Emerging Patterns for Engineered Nanomaterials in the Environment:
A Review of Fate and Toxicity Studies
Kendra L. Garner and Arturo A. Keller
UC Center on the Environmental Implications of Nanotechnology and School of Environmental Science and Management, University of California, Santa Barbara, CA 93106
Supporting Information
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Many studies were considered for determining the merging patterns for fate and toxicity
represented in Figures 2-5. These sources are summarized in Table S1. Some of these sources
provided direct process rate information, while others provided additional conditions or
exceptions to the generalized results, as discussed in the main manuscript.
Table S1. References for rates of aggregation, sedimentation, and dissolution, as well as
specifically how ENMs interact with NOM, transport in porous media, and toxicity.
NP Specific Process
References
Aggregation Rates
Adeleye et al., 2013; Afrooz et al., 2013; Aruoja et al., 2009; Baalousha, 2009; Baalousha et al., 2008; Bennett et al., 2013; Bian et al., 2011; Chen et al., 2007, 2006, 2012; Chen and Elimelech, 2007, 2006; Chinnapongse et al., 2011; Chowdhury et al., 2011; Cornelis et al., 2011; Delay et al., 2011; Diedrich et al., 2012; Domingos et al., 2009; Dunphy Guzman et al., 2006; Elzey and Grassian, 2010; Fabrega et al., 2009; Fairbairn et al., 2011; Fang et al., 2009; Fortner et al., 2005; Franklin et al., 2007; French et al., 2009; Furman et al., 2013; Ghosh et al., 2010; Gong et al., 2011; Griffitt et al., 2008; He and Zhao, 2005; Hoecke et al., 2009; Hotze et al., 2010; Huynh and Chen, 2011; Hyung et al., 2006; Jones and Su, 2012; Keller et al., 2012, 2010; T. Li et al., 2010; Li et al., 2011, 2010; Limbach et al., 2008; Lin et al., 2010; Liu et al., 2009; Ma et al., 2013; Miller et al., 2010; Pakrashi et al., 2012; Pelley and Tufenkji, 2008; Petosa et al., 2012; Pettibone et al., 2008; Phenrat et al., 2007; Quik et al., 2013; Reinsch et al., 2012; N. Saleh et al., 2008; N. B. Saleh et al., 2008; Schrick et al., 2004; Shih et al., 2012; Simon-Deckers et al., 2009; Stankus et al., 2010; Stebounova et al., 2011; Thio et al., 2011; Unrine et al., 2010; Velzeboer et al., 2008; von der Kammer et al., 2010; P. Wang et al., 2008; Y. Wang et al., 2012; Wang et al., 2011; Wong et al., 2010; Yin et al., 2012; Zhang et al., 2009, 2008; Zhou and Keller, 2013, 2010; Zhu et al., 2012; Zook et al., 2012
Sedimentation Rates
Adeleye et al., 2013; Aruoja et al., 2009; Battin et al., 2009; Bennett et al., 2013; Bian et al., 2011; Chen et al., 2012; Chen and Elimelech, 2006; Chinnapongse et al., 2011; Chowdhury et al., 2011; Fairbairn et al., 2011; Fang et al., 2009; Ferry et al., 2009; Fortner et al., 2005; Franklin et al., 2007; Gilbert et al., 2007; Griffitt et al., 2008; He and Zhao, 2005; Hyung and Kim, 2008; Jones and Su, 2012; Keller et al., 2010; Kennedy, et al.,
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2008; Z. Li et al., 2010; Limbach et al., 2008; Lowry et al., 2012; Ma et al., 2013; Mackenzie et al., 2012; Miller et al., 2010, p. 201; Montes et al., 2012; Pettibone et al., 2008; Quik et al., 2013, 2010; N. Saleh et al., 2008; Schrick et al., 2004; Stankus et al., 2010; Stebounova et al., 2011; Thio et al., 2011; von der Kammer et al., 2010; P. Wang et al., 2008; Y. Wang et al., 2012; Yin et al., 2012; Zhang et al., 2009, 2008; Zhou and Keller, 2010; Zhou et al., 2012b; Zhu and Cai, 2012; Zhu et al., 2012, 2007
Dissolution Rates
Adeleye et al., 2013; Baalousha et al., 2008; Benn and Westerhoff, 2008; Bian et al., 2011; Blaser et al., 2008, p. 2; Blinova et al., 2010; Cornelis et al., 2011; David et al., 2012; Diedrich et al., 2012; Dobias and Bernier-Latmani, 2013, p. 2; Elzey and Grassian, 2010; Fabrega et al., 2009; Fairbairn et al., 2011; Fang et al., 2009; Franklin et al., 2007; Gaiser et al., 2011; Griffitt et al., 2008; Hitchman et al., 2013; Ho et al., 2010; Huynh and Chen, 2011; Judy et al., 2011; Kasemets et al., 2009; Keller et al., 2010; Levard et al., 2011; Li et al., 2013; Li et al., 2011, 2010; Liu and Hurt, 2010; Liu et al., 2010, 2009; Ma et al., 2013; Mahmood et al., 2011; Miller et al., 2010; Montes et al., 2012; Mortimer et al., 2010; Pakrashi et al., 2012; Petosa et al., 2012; Reed et al., 2012; Reinsch et al., 2012; Rimer et al., 2007; Roelofs and Vogelsberger, 2006, 2004; Simon-Deckers et al., 2009; Stebounova et al., 2011; Vogelsberger et al., 2008; Wang et al., 2011; Wong et al., 2010; Xia et al., 2008; Yin et al., 2012; Zook et al., 2012
Interactions with NOM
Baalousha, 2009; Baalousha et al., 2008; Bennett et al., 2013; Bian et al., 2011; Blinova et al., 2010; Chen et al., 2012; Chinnapongse et al., 2011; Delay et al., 2011; Fabrega et al., 2009; Franklin et al., 2007; Furman et al., 2013; Ghosh et al., 2010; Hitchman et al., 2013; Huynh and Chen, 2011; Hyung and Kim, 2008; Hyung et al., 2006; Jones and Su, 2012; Kennedy, et al., 2008; Z. Li et al., 2010; Limbach et al., 2008; Liu and Hurt, 2010; Lowry et al., 2012; Pelley and Tufenkji, 2008; Quik et al., 2010; N. B. Saleh et al., 2008; Shoults-Wilson et al., 2011; Stankus et al., 2010; Thio et al., 2011; von der Kammer et al., 2010; P. Wang et al., 2008; Y. Wang et al., 2012; Wang et al., 2011; Westerhoff et al., 2013; Xie et al., 2008; Yin et al., 2012; Zhang et al., 2009; Zhou and Keller, 2010
Zeta Potential Adeleye et al., 2013; Battin et al., 2009; Bian et al., 2011; Delay et al., 2011; Elzey and Grassian, 2010; French et al., 2009; Ghosh et al., 2010; Griffitt et al., 2009, 2008; Handy et al., 2008; Hitchman et al., 2013; Jiang et al., 2009; Judy et al., 2011; Limbach et al., 2008; Mackenzie et al., 2012; Petosa et al., 2012; Quik et al., 2010; Reed et al., 2012; Sunkara et al., 2010; P. Wang et al., 2008; Wang et al., 2011; Yin et al., 2012
Fate and Transport in Porous Media
Ben-Moshe et al., 2010; Boxall et al., 2007; Bradford et al., 2002; Brant et al., 2005; Cheng et al., 2005; Chowdhury et al., 2011; Cornelis et al., 2010; Darlington et al., 2009; Espinasse et al., 2007; Fang et al., 2009; Ghosh et
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al., 2008; Godinez and Darnault, 2011; Grant et al., 2001; Grolimund et al., 2001; Jaisi and Elimelech, 2009; Jaisi et al., 2008; Jeong and Kim, 2009; Johnson et al., 2009; Jones and Su, 2012; Kanel et al., 2008; Kool et al., 2011; Lecoanet and Wiesner, 2004; Lecoanet et al., 2004; Li et al., 2008; Z. Li et al., 2011; Liu et al., 2009; Mattison et al., 2011; Milani et al., n.d.; Pelley and Tufenkji, 2008; Petosa et al., 2012; Phenrat et al., 2010; N. Saleh et al., 2008; Schrick et al., 2004; Shoults-Wilson et al., 2011; Tian et al., 2012, 2010; Tiede et al., 2009; Tosco et al., 2012; Tourinho et al., 2012; Tufenkji and Elimelech, 2004; Vecchia et al., 2009; C. Wang et al., 2012; Y. Wang et al., 2012, 2008; Xiao and Wiesner, 2013
Toxicity (Adams et al., 2006; Aruoja et al., 2009; Baek and An, 2011; Battin et al., 2009; Baun et al., 2008; Ben-Moshe et al., 2013; Bennett et al., 2013; Blinova et al., 2010; L. Canesi et al., 2010; Laura Canesi et al., 2010; Coleman et al., 2010; Crane et al., 2008; Fabrega et al., 2009; Franklin et al., 2007; Gaiser et al., 2011; García et al., 2011; Gomes et al., 2011; Gong et al., 2011; Griffitt et al., 2009, 2008, 2007; Heinlaan et al., 2008; Ho et al., 2010; Hoecke et al., 2009; Horie et al., 2013, 2009; Ji et al., 2011; Jiang et al., 2009; Judy et al., 2011; Kadar et al., 2010; Kasemets et al., 2009; Keller et al., 2013, 2012; Kennedy, et al., 2008; Kool et al., 2011; Li et al., 2009, 2013; M. Li et al., 2011; T. Li et al., 2010; Z. Li et al., 2010; Manabe et al., 2011; Manzo et al., 2011; Miao et al., 2009; Miller et al., 2010; Mortimer et al., 2010; Pakrashi et al., 2012; Parks et al., 2013; Reinsch et al., 2012; Ringwood et al., 2009; Rogers et al., 2010; Shoults-Wilson et al., 2011; Simon-Deckers et al., 2009; Singh et al., 2011; Tedesco et al., 2010; Tong et al., 2007; Velzeboer et al., 2008; Wong et al., 2010; Xia et al., 2008; Zhu et al., 2012, 2009, 2007; Zook et al., 2012)
Figure 2 in main manuscript was created using Table S2, which considers aggregation rates
observed in many different waters. For ENMs with multiple studies on the rates of aggregation in
a water type, we used the most common rate provided, meaning that if two sources estimated the
rate of aggregation as days and one sources as weeks, we put days, and noted in the footnotes
that the third source estimated weeks. Red indicates aggregation within hours, orange indicates
aggregation within days, yellow indicates aggregation within weeks, and green indicates minimal
aggregation over months or longer. These categorizations are solely with respect to the rate of
aggregation without evaluating exposure or risk. Key details, deviations and exceptions are noted
in the footnotes. Asterisks indicate the presence of a coating on the ENMs.
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Table S2. Aggregation rates by water type
NP Stormwater (low IS, high NOM)
Freshwater (low IS, mid NOM)
Groundwater (mid IS, low NOM)
Seawater (high IS, low NOM)
AgFabrega et al., 2009; Huynh and Chen, 2011*; Chinnapongse et al., 2011*
Fabrega et al., 2009; Huynh and Chen, 2011*; Chinnapongse et al., 2011*
Huynh and Chen, 2011*; Chinnapongse et al., 2011*
Li et al., 20111; Chinnapongse et al., 2011*2
Al2O3Pakrashi et al., 2012
AuStankus et al., 2010* Stankus et al., 2010*; Li et
al., 2010Unrine et al., 2010; Afrooz et al., 2013*3; Stankus et al., 2010*
Afrooz et al., 2013*
CeO2Keller et al., 2010 Keller et al., 2010;
Cornelis et al., 2011*;Keller et al., 2010 Keller et al., 2010; Hoecke
et al., 2009
CuO Jones and Su, 20124
C60Adeleye and Keller, 2014; Chen and Elimelech, 2007
Adeleye and Keller, 2014; Chen and Elimelech, 2007
Adeleye and Keller, 20145; Fortner et al., 2005; Chen and Elimelech, 2007
Adeleye and Keller, 20146; Chen and Elimelech, 2006; Fortner et al., 2005; Chen and Elimelech, 2007
FeOOHGilbert et al., 20077 Gilbert et al., 20078
FeO/Fe2O3Baalousha, 2009 Baalousha, 2009 Zhang et al., 2008 Chen et al., 2006*
LatexPelley and Tufenkji, 2008
MWCNTsSaleh et al., 2008 Saleh et al., 2008 Lin et al., 20109 Lin et al., 201010
NiO Gong et al., 2011 Zhang et al., 2008
nZVISaleh et al., 2008* Keller et al., 2012*11 Keller et al., 2012*; Yin et
al., 2012Keller et al., 2012*; Yin et al., 2012*
SiO2Zhang et al., 2009 Zhang et al., 2009 Zhang et al., 2009; Zhang
et al., 2008Zhang et al., 2009
SWCNTsBennett et al., 2013; Wang Bennett et al., 2013; Wang Bennett et al., 2013 Bennett et al., 2013
1 Aggregation of coated Ag is on the order of weeks at IS below 400 mMol NaCl2 Aggregation of Ag in seawater occured within hours3 Coated Au aggregates within hours in the presence of common groundwater cations4 Aggregation of CuO in groundwater ranges from days to weeks5 Significant C60 aggregation occurs within hours in groundwater6 Significant C60 aggregation occurs within hours in seawater7 Tests completed at g/L concentrations8 Tests completed at g/L concentrations9 Tests completed at 200 mg/L10 Tests completed at 200 mg/L11 Uncoated nZVI will aggregate within minutes in freshwater
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et al., 2008 et al., 2008
TiO2Domingos et al., 2009; von der Kammer et al., 2010; Shih et al., 2012
Velzeboer et al., 200812; Keller et al., 2010; Thio et al., 2011; Domingos et al., 2009; von der Kammer et al., 2010; Shih et al., 2012
Thio et al., 2011; Zhang et al., 2008; French et al., 200913; Chen et al., 2012; von der Kammer et al., 2010; Shih et al., 2012
Keller et al., 2010; Chowdhury et al., 2011; Domingos et al., 2009; French et al., 2009; Chen et al., 2012; von der Kammer et al., 2010; Simon-Deckers et al., 2009; Shih et al., 2012
ZnOZhou and Keller, 2010 Zhou and Keller, 2010;
Keller et al., 2010; Franklin et al., 200714
Zhou and Keller, 2010; Zhang et al., 200815; Bian et al., 2011
Zhou and Keller, 2010; Keller et al., 2010; Miller et al., 2010; Fairbairn et al., 2011; Bian et al., 2011; Wong et al., 2010
Figure 3 in the main manuscript was created using the Table S3, which considers sedimentation
rates observed in different studies. Colors follow Table S2. Categorizations do not evaluate
exposure or risk. Key details, deviations and exceptions are noted in the footnotes.
Table S3. Sedimentation rates by water type
NP Stormwater (low IS, high NOM)
Freshwater (low IS, mid NOM)
Groundwater (mid IS, low NOM)
Seawater (high IS, low NOM)
Ag Chinnapongse et al., 2011* Lowry et al., 2012; Chinnapongse et al., 2011*; Griffitt et al., 2008; Quik et al., 2013*
Stebounova et al., 2011*; Chinnapongse et al., 2011*; Quik et al., 2013*16
Au Stankus et al., 2010* Stankus et al., 2010* Stankus et al., 2010* Ferry et al., 2009
CeO2Keller et al., 2010; Quik et al., 2010; Limbach et al., 2008
Keller et al., 201017; Zhou et al., 2012; Quik et al., 2010; Quik et al., 2013
Keller et al., 2010 Keller et al., 2010; Fairbairn et al., 2011 ; Montes et al., 2012; Quik et al., 2010; Limbach et al., 2008; Quik et al., 201318
12 No significant aggregation of TiO2 occurred in pond water over the course of weeks13 TiO2 aggregates in hours in the presence of any IS14 ZnO aggregates within 6 hours for in freshwater15 ZnO aggregates within days in tap water16 Ag will sediment over the course of weeks to months17 CeO2 sedimentation takes more than weeks in freshwater18 CeO2 sediments in seawater over the course of days to weeks
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12131415161718
CuO Griffitt et al., 2008
C60Adeleye and Keller, 2014; Fortner et al., 2005; Zhu and Cai, 2012;
Adeleye and Keller, 2014; Fortner et al., 2005; Zhu and Cai, 2012; Quik et al., 201319
Adeleye and Keller, 201420; Fortner et al., 2005; Zhu and Cai, 2012
Adeleye and Keller, 201421; Chen and Elimelech, 2006; Fortner et al., 2005; Zhu and Cai, 2012; Quik et al., 2013
FeOOHGilbert et al., 2007 Gilbert et al., 2007
FeO/Fe2O3Zhu et al., 201222 Zhang et al., 2008
MWCNTs Wang et al., 2008; Hyung and Kim, 2008; Hyung et al., 2006; Lin et al., 2010
Wang et al., 2008; Hyung and Kim, 2008; Hyung et al., 2006; Lin et al., 2010
Zhu and Cai, 2012; Hyung and Kim, 2008; Lin et al., 2010
NiO Griffitt et al., 2008 Zhang et al., 2008
nZVI Schrick et al., 2004* Schrick et al., 2004* Li et al., 2010*; Saleh et al., 2008*
Li et al., 2010; Yin et al., 2012*23
SiO2Zhang et al., 2009 Zhang et al., 2009 Zhang et al., 2009; Zhang
et al., 200824Zhang et al., 2009
SWCNTsWang et al., 2008 Wang et al., 2008
TiO2Keller et al., 2010; Wang et al., 2012; von der Kammer et al., 2010
Keller et al., 2010; Zhou et al., 201225; Wang et al., 2012; von der Kammer et al., 2010; Battin et al., 200926
Keller et al., 2010; Zhang et al., 2008; Chen et al., 2012; Fang et al., 200927; von der Kammer et al., 2010
Keller et al., 2010; Fairbairn et al., 2011; Chen et al., 2012
ZnO Keller et al., 2010; Zhou and Keller, 2010; Keller et al., 201028; Zhou et al., 2012; Franklin et al., 200729
Keller et al., 2010; Zhang et al., 200830
Zhou and Keller, 2010; Keller et al., 2010; Miller et al., 201031; Fairbairn et al., 2011
Figure 4 on dissolution rates was created using the studies in Table S4. Red indicates dissolution
within hours, orange indicates dissolution within days, yellow indicates dissolution within
weeks, and green indicates minimal dissolution over months or longer. These categorizations do
not evaluate exposure or risk. Key details, deviations and exceptions are noted in the footnotes.
Asterisks indicate the presence of a coating on the ENM.
Table S4. Dissolution rates by water type
19 C60 sediments within days in freshwater20 Significant sedimentation of C60 occurred within 8 days21 Some C60 was still found in seawater after 8 days, indicating sedimentation over the course of weeks22 Uncoated Fe2O3 settles within days in zebrafish culture medium23 Coated nZVI sedimented in the presence of IS over the course of hours24 SiO2 sediments over the course of weeks in tap water25 TiO2 sediments over weeks in low IS freshwater26 TiO2 sediments within hours in natural lake water27 TiO2 sediments in days to weeks in soil water28 ZnO did no aggregate in 8 hours in freshwater29 ZnO sedimentation occurred with 6 hours in freshwater30 ZnO sedimented in tapwater within days31 ZnO sediments in seawater within hours at ZnO concentrations above 10 mg/L, but may take a week at lower concentrations
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1920212223242526272829303132
NP Stormwater (low IS, high NOM)
Freshwater (low IS, mid NOM) Groundwater (mid IS, low NOM)
Seawater (high IS, low NOM)
Ag
Dobias and Bernier-Latmani, 2013*32; Fabrega et al., 2009; Huynh and Chen, 2011*; Griffitt et al., 2008; Gaiser et al., 2011; Quik et al., 2013*33
Shoults-Wilson et al., 2011*; Liu and Hurt, 2010*; Benn and Westerhoff, 2008
Liu and Hurt, 2010*34; Li et al., 2010*; Quik et al., 2013*35
Al2O3
Griffitt et al., 2008; Pakrashi et al., 2012
Simon-Deckers et al., 2009; Roelofs and Vogelsberger, 2006
Au
Hitchman et al., 2013*36
Hitchman et al., 2013* Unrine et al., 2010; Hitchman et al., 2013*; Judy et al., 2011*
Hitchman et al., 2013*
CeO2
Cornelis et al., 2011*; Gaiser et al., 2011; Quik et al., 2013
Cornelis et al., 2011* Montes et al., 2012; Quik et al., 2013
CuO
Wang et al., 2011 Blinova et al., 2010; Aruoja et al., 2009; Griffitt et al., 2008; Wang et al., 2011; Mortimer et al., 2010
Wang et al., 2011 Wang et al., 2011
FeO/ Fe2O3 Baalousha et al., 2008 Baalousha et al., 2008
NiOMahmood et al., 201137
Griffitt et al., 2008; Mahmood et al., 2011
Mahmood et al., 2011 Mahmood et al., 2011
nZVI Adeleye et al., 2013*PbS Liu et al., 2009
TiO2
Keller et al., 2010; Miller et al., 2010
Miller et al., 2010; Griffitt et al., 2008 Keller et al., 2010; Miller et al., 2010
Keller et al., 2010; Miller et al., 2010
ZnO
Li et al., 2013 Li et al., 2013; Bian et al., 2011; Blinova et al., 201038; Franklin et al., 2007; Reed et al., 2012; Mortimer et al., 2010
Reed et al., 2012; Kool et al., 2011;
Miller et al., 2010; Fairbairn et al., 2011; Li et al., 2013; Wong et al., 2010; Xia et al., 2008; Montes et al., 201239; David et al., 2012
Table S5 includes a summary of toxicity tests for various ENMs on various species in different
media. Toxicity observed at environmentally relevant concentrations are highlighted in red.
Toxicity observed at environmentally relevant concentrations if they were to increase 100-fold
are highlighted in orange. Toxicity observed at < 10 mg/L are highlighted in yellow. Minimal
toxicity observed at concentrations > 10 mg/L are highlighted in light green. When no toxicity
was observed at all tested concentrations, the cells are highlighted in dark green. White indicates
32 In river water, only half of the coated Ag dissolved over four months33 Coated Ag dissolution may take months in freshwater34 Ag dissolved in seawater between 6 and 125 days35 Coated Ag dissolution in seawater will take from weeks to months36 PVP-stabilized Au is essentially insoluble in all media37 NiO dissolution is negligible between pH7-11, even in presence of salts for all media38 ZnO at 10 mg/L dissolved over hours to days39 ZnO at concentrations below 10 mg/L dissolves over the course of days
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that not enough data were given to place the study into one of the above categories. Asterisks
indicate the presence of a coating on the ENM.
Table S5. Toxicity of ENMs to various species.
NP Species Toxic Concentration ReferenceAg E. coli Minimum inhibitory concentration 100 μM Ho et al., 2010*Ag Hemolytic toxicity All AgNPs caused at least 75% hemolysis at the highest
concentration of 100 ug/ml, and caused no additional hemolysis compared to theDMEM at the lowest concentration of 10 ug/ml.
Zook et al., 2012*
Ag P. fluorescens Ag reduced bacterial growth entirely at 2000 ppb (19 μM) under all conditions and adversely affected growth at 200 ppb (1.9 μM) under some conditions, indicating some toxicity
Fabrega et al., 2009
Ag E. fetida Toxicity observed at 7.41 mg/kg in sandy loam soil Shoults-Wilson et al., 2011*
Ag E. coli Dissolved Ag concentrations measured in the E. coli growth inhibition media with AgNP concentrations equal to 50 mg/L were 8−10 μg/L for the unsulfidized and lowest sulfidized AgNP (agg) samples
Reinsch et al., 2012*
Ag D. magna LC50 ~ 3 ug/L Li et al., 2010Ag D. pulex, D. rerio, P.
kirchneriellaLC50 0.04-7.2 mg/L Griffitt et al., 2008
Ag D. magna Acute toxicity 56% death at 0.1 mg/L, 100% death at 1 mg/L, chronic toxicity at 0.001 mg/L
Gaiser et al., 2011
Ag Thalassiosira weissflogii Photosynthesis and chlorophyll were severely suppressed beyond around 1*10^-11 M.
Miao et al., 2009
Al2O3 Microtox (bacteria), pulse-amplitude modulation (algae), Chydotox (crustaceans), and Biolog (soil enzymes)
No effects were observed up to 100 mg/L Velzeboer et al., 2008
Al2O3 C. metallidurans CH34 and E. coli MG1655
Toxic at all concentrations (10 – 500 mg/L) Simon-Deckers et al., 2009
Al2O3 B. subtilis, E. coli and P. fluorescens
36-70% of bacteria died at 20 mg/L Jiang et al., 2009
Al2O3 D. magna EC50 ~114.357 mg/L, LC50 ~162.392 Zhu et al., 2009Al2O3 D. pulex, D. rerio, P.
kirchneriellaLC50 3.99 - >10 mg/L Griffitt et al., 2008
Al2O3 E. fetida No mortality occurred in subchronic exposures, although reproduction decreased at ≥3,000 mg/kg nano-sized Al2O3
Coleman et al., 2010
Au E fetida Bioavalable and reproduction was negatively affected at 8 and 3.4% of bulk soil concentrations
Unrine et al., 2010
Au D. magna LC50 ~ 70 mg/L Li et al., 2010Au M. sexta biomagnification factor 6.2 - 11.6 Judy et al., 2011*Au Mytilus edulis Oxidative stress occurred within 24 hours at 750 ppb Tedesco et al., 2010CeO2 Microtox (bacteria),
pulse-amplitude No effects were observed up to 100 mg/L Velzeboer et al., 2008
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NP Species Toxic Concentration Referencemodulation (algae), Chydotox (crustaceans), and Biolog (soil enzymes)
CeO2 P. subcapitata, D. magna, and T. platyurus, and embryos of D. rerio
No acute toxicity was observed for the two crustaceans and D.rerio embryos, up to test concentrations of 1000, 5000, and 200mg/L, respectively. In contrast, significant chronic toxicity to P. subcapitata with EC10s between 2.6-5.4 mg/L was observed.
Hoecke et al., 2009
CeO2 RAW 264.7 and BEAS-2B cell lines
CeO2 (25 ug/mL) NPs were taken up intact the cells without inflammation or cytotoxicity
Xia et al., 2008
CeO2 D. magna LC50 ~0.012 mg/ml García et al., 2011CeO2 P. subcapitata LC50 10.3 mg/L Rogers et al., 2010CeO2 D. magna No acute toxicity. Chronic toxicity at 10 mg/L Gaiser et al., 2011Cr2O3 E. coli As the concentration of Cr2O3 (100 nm) in the culture
media increased from 0 – 100 ug/mL, the percentage of live cells decreased linearly
Singh et al., 2011
Cr2O3 Human lung carcinoma A549 cells and human keratinocyte HaCaT cells
HaCaT cells showed a greater reduction in cell viability by Cr2O3 exposure than A549 cells. In particular, the cytotoxicity of NPs washigher than that for fine particles at a high concentration of Cr2O3 (0.5 mg/mL)
Horie et al., 2013
Cu D. rerio LC50 1.56 mg/L Griffitt et al., 2007CuO D. magna, T. platyurus,
and T. thermophilaThe L (E)C50 values of nanoCuO for both crustaceans in natural water ranged from 90 to 224 mg Cu/l
Blinova et al., 2010
CuO P. subcapitata EC50 = 0.71 mg Cu/l Aruoja et al., 2009CuO Soil microbe community soil microbe community changed, indicating toxicity at 1
and 5% w/w dry soilChen et al., 2006
CuO E. coli, B. subtilis, and S. aureus
EC50 ranged from 28.6 – 65.9 mg/L Baek and An, 2011
CuO V. fischeri, D. magna, and T. platyurus
L (E)C59 ~ 2.1 – 79 mg/L Heinlaan et al., 2008
CuO D. pulex, D. rerio, P. kirchneriella
LC50 0.06 - 0.94 mg/L Griffitt et al., 2008
CuO S. cerevisiae 8-h EC50 were 20.7 mg/L and 24-h EC50 were 13.4 mg/L
Kasemets et al., 2009
CuO T. thermophila EC50 128 mg/L Mortimer et al., 2010
CuO Mytilus galloprovincialis CuO NPs induced oxidative stress in mussels by overwhelming gills antioxidant defense system at 10 ug/L
Gomes et al., 2011
C60 Microtox (bacteria), pulse-amplitude modulation (algae), Chydotox (crustaceans), and Biolog (soil enzymes)
Toxic effects were observed at greater than 1 mg/L Velzeboer et al., 2008
C60 P. subcapitata and D. magna
The mobility of daphnids was not affected in the tested concentrations (≤50 mg C60/l). The algal growth rate was inhibited up to 30% at 90 mg C60/l, but no reproducible concentration–response relationships could be
Baun et al., 2008
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NP Species Toxic Concentration Referenceestablished
C60 D. rerio C60 at 1.5 mg/L delayed zebrafish embryo and larval development
Zhu et al., 2007
C60 D. magna EC50 ~9.344 mg/L and LC50 ~ 10.515 mg/L Zhu et al., 2009C60 Soil microbe community No effect on structure, function, or processes Tong et al., 2007C60 Crassostrea virginica Significant toxicity at 10 ppb Ringwood et al.,
2009C60 Mytilus galloprovincialis Some effects observed at 5 mg/L Canesi et al., 2010Fe2O3 D. rerio EC50 ~ 36.06 mg/L, LC50 ~ 53.35mg/L Zhu et al., 2012Fe2O3 Mytilus galloprovincialis no significant effect was detected following exposure of
embryos to Fe up to 8 mg/LKadar et al., 2010
Fe3O4 Soil microbe community minimal changes to microbial community, indicating limited toxicity at 1 and 5% w/w dry soil
Chen et al., 2006
Fe3O4 D. magna LC50 ~23·10-4 mg/ml García et al., 2011Latex O. latipes Survival decreased under some conditions at 1 mg/L Manabe et al., 2011MWCNTs C. metallidurans CH34
and E. coli MG165550 – 60% viability loss at 100 mg/L Simon-Deckers et al.,
2009MWCNTs C. dubia, L. plumulosus
and H. aztecaAqueous exposures to raw MWNTs decreased C. dubia viability, but such effects were not observed during exposure to functionalized MWNTs (>80 mg/L). Sediment exposures of the amphipods indicated mortality increased as particle size decreased, although raw MWNTs induced lower mortality (LC50 50 to >264 g/kg) than carbon black (LC50 18–40 g/kg) and activated carbon (LC50 12–29 g/kg).
Kennedy, et al., 2008
MWCNTs D. magna EC50 ~8.723 mg/L and LC50 ~22.751 mg/L Zhu et al., 2009NiO C. vulgaris NiO NPs had severe impacts on the algae, with 72 h
EC50 values of 32.28 mg NiO/LGong et al., 2011
NiO E. coli, B. subtilis, and S. aureus
EC50 ranged from 121.1 – 160.2 mg/L Baek and An, 2011
NiO Human keratinocyte HaCaT cells, Human lung carcinoma A549 cells
The cell proliferation was completely inhibited by 50 μg/mL Ni2+
Horie et al., 2009
NiO D. pulex, D. rerio, P. kirchneriella
LC50 0.35 - >10 mg/L Griffitt et al., 2008
nZVI I. galbana, D. tertiolecta, T. pseudonana, P. subcapitata, and D. magna
Growth was suppressed between 0.4 and 12 mg/L Keller et al., 2012*
nZVI E. coli Minimum inhibitory concentration (MIC) after 24 h was 5 mg/L for uncoated nZVI. MIC for coated nZVI ranged from 100-500 mg/L
Li et al., 2010*
nZVI O. latipes Toxicity observed at 0.5 mg/L Li et al., 2009*Sb2O3 E. coli, B. subtilis, and S.
aureusEC50 ranged from 144.7 – 324 mg/L Baek and An, 2011
SiO2 B. subtilis and E. coli SiO2 at 5000 mg/L resulted in 99% growth reduction of B. subtilis, but only 48% growth reduction of E. coli at 5000 mg/L
Adams et al., 2006
SiO2 B. subtilis, E. coli and P. fluorescens
40-70% of bacteria died at 20 mg/L Jiang et al., 2009
SiO2 Mytilus galloprovincialis Some negative effects at 10 mg/L Canesi et al., 2010
11
NP Species Toxic Concentration ReferenceSiO2 Mytilus galloprovincialis No effect observed up to 5 mg/L Canesi et al., 2010SiO2 Chlorella sp. No toxic effect observed up to 1000 mg/L Ji et al., 2011SWCNTs P. subcapitata Exposure to 10 mg/L CNT does negatively influence the
growth of algae across most treatments. However, decreased growth was observed compared with the control.
Bennett et al., 2013
SWCNTs D. magna EC50 ~1.306 mg/L and LC50 ~2.425 mg/L Zhu et al., 2009SWCNTs A. abdita, A. bahia, L.
plumulosusNo significant mortality to any species via sediment or food matrices was observed at concentrations up to 100 ppm.
Parks et al., 2013
TiO2 Microtox (bacteria), pulse-amplitude modulation (algae), Chydotox (crustaceans), and Biolog (soil enzymes)
No effects were observed up to 100 mg/L Velzeboer et al., 2008
TiO2 T. pseudonana, and S. marinoi, D. tertiolectaand I. galbana
No toxic effects up to g/L concentrations Miller et al., 2010
TiO2 B. subtilis and E. coli 72% growth reduction in E. coli exposed to 5000 mg/L and 75% growth reduction in B. subtilis exposed to 1000 mg/L
Adams et al., 2006
TiO2 C. metallidurans CH34 and E. coli MG1655
Significant loss of viability was observed after exposure to the smallest TiO2 NP (10 to 25 nm) and viability decreased from 15-52% at 100 mg/L.
Simon-Deckers et al., 2009
TiO2 RAW 264.7 and BEAS-2B cell lines
TiO2 (25 ug/mL) did not elicit any adverse or protective effects
Xia et al., 2008
TiO2 P. subcapitata EC50=5.83 mg Ti/l Aruoja et al., 2009TiO2 Phytoplankton and
Biofilms24 h of exposure nano-TiO2 (initial concentration, 5.3mgL-1) had significantly damaged cell membranes. Similar, but less damaging effects were observed in biofilms
Battin et al., 2009
TiO2 B. subtilis, E. coli and P. fluorescens
TiO2 NPs did not affect bacterial populations Jiang et al., 2009
TiO2 V. fischeri, D. magna, and T. platyurus
Not toxic even at 20 g/L Heinlaan et al., 2008
TiO2 D. rerio Not toxic up to 100 mg/L Griffitt et al., 2009TiO2 D. magna EC50 ~ 35.306 mg/L and LC50 ~ 143.387 mg/L Zhu et al., 2009TiO2 D. magna LC50 ~0.016 mg/ml García et al., 2011TiO2 D. pulex, D. rerio, P.
kirchneriellaLC50 >10 mg/L Griffitt et al., 2008
TiO2 S. cerevisiae Not toxic even at 20000 mg/L Kasemets et al., 2009
ZnO T. pseudonana, and S. marinoi, D. tertiolectaand I. galbana
NEC 428 μg L-1 for S. marinoi, 233 μg L-1 for T. pseudonana. NEC for other two species around 500 - 1000 μg L-1.
Miller et al., 2010
ZnO E. coli Toxic in soft water at 1.2 mg/L, no toxicity observed at 100 mg/L in hard water
Li et al., 2013
ZnO S. costatum, T. pseudonana,
T. japonicas, E. Rapax, and O. melastigma
96 hour LC50 values ranged from 0.85 – 4.56 mg/L Wong et al., 2010
12
NP Species Toxic Concentration ReferenceZnO B. subtilis and E. coli At 10 mg/L, ZnO resulted in 90% growth reduction of B.
subtilis but only 48% growth reduction in E. coli resulted at 1000 mg/L ZnO
Adams et al., 2006
ZnO D. magna, T. platyurus, and T. thermophila
L (E)C50 values for nanoZnO were 1.1–16 mg Zn/l Blinova et al., 2010
ZnO P. subcapitata 72-h LC50 value near 60 μg Zn/L, attributable solely to dissolved zinc
Franklin et al., 2007
ZnO RAW 264.7 and BEAS-2B cell lines
ZnO (25 ug/mL) induced toxicity in both cells, leading to the generation of reactive oxygen species (ROS), oxidant injury, excitation of inflammation, and cell death.
Xia et al., 2008
ZnO P. subcapitata 72 h EC50 ~0.04 mg Zn/l Aruoja et al., 2009ZnO E. coli, B. subtilis, and S.
aureusE50 ranged from 85.5 - >125 mg/L Baek and An, 2011
ZnO E. coli All media exhibited strong toxicity with 3 h LC50 at lower than 0.1 mg Zn L-1.The bacterialmortality all exceeded 90% at concentrations of zinc higher than 1.0 mg L-1
M. Li et al., 2011
ZnO B. subtilis, E. coli and P. fluorescens
All bacteria died at 20 mg/L Jiang et al., 2009
ZnO V. fischeri, D. magna, and T. platyurus
L (E)C 50 ~ 0.18 – 3.2 mg/L Heinlaan et al., 2008
ZnO D. magna EC50 ~ 0.622 mg/L and LC50 ~1.511 mg/L Zhu et al., 2009
ZnO S. cerevisiae 8-h EC50 121–134 mg ZnO/l and 24-h EC50 131–158 mg/l
Kasemets et al., 2009
ZnO T. thermophila EC50 5 mg/L Mortimer et al., 2010
ZnO F. candida No effect up to 6400 mg/kg. Reproduction was affected at just under 2000 mg/kg
Kool et al., 2011
ZrO2 Microtox, algae, Chydotox, and Biolog
No effects were observed up to 100 mg/L Velzeboer et al., 2008
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