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Seminar
onBIOSORPTION OF METALS
presented by guided by
LASSIN VARGHESE Lect. PRAVEENA GANGADHARAN
ROLL NO : 30 CIVIL ENGG DEPTS7 , CIVIL ENGG SNGCESNGCE
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1. While choosing the biomass for metal biosorption, its origin is a
major factor .
2. Biomasscan come from, activated sludge or fermentation
waste from industries like those of food, diary and starch .
3. organisms coming from their natural habitats are good sources
of biomass.
4. Fast growing organisms that are specifically cultivated for
biosorption purposes
SELECTION OF BIOMASS
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1. Agricultural products
2. Seaweeds
3. Fungi and Yeast
4. Bacteria
TYPES OF BIOMASS
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SELECTION OF BIOMASS
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CASE STUDY:EXPERIMENT WITHULMUS AND THEIR ASH
PREPARATION OF ULMUS LEAVES
1. Ulmus leaves were washed with deionized water.
2. Then laid down to be dried in sunlight for 14 days.
3. Dry leaves were then ground with electrical grinder.
4. After being grounded, the leaf particle were sieved with 60 70 mesh
sieves (0.20.3mm)
5. Then the leaves were dried at 1000
C for 24 hours to be constant weight.
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Figure :Ulmus Leaves
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PREPARATION OF ASHES
1. The Ulmus leaves ash obtained from burning of Ulmus leaves in
oven at 5500C for 15 minutes.
2. Dried leaves were stored in desiccator until used.
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PREPARATION OF STOCK SOLUTION
1. By dissolving the cadmium nitrate in the distilled water.
2. The concentration range of cadmium in the solution varied between 240 mg/l.
3. For the required PH value diluted and the concentrated H2SO4 and
NaOH solution were added.
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PROCEDURE
1. The experiment were carried out in the batch system for the
measurement of adsorption capacities.
2. Each cadmium solution was placed in 1000 ml. beaker and known
amount of adsorbent (1g) were added to each beaker.
3. The beaker were agitated on the jar test equipments at 300 rpm
constant mixing rate for 5
300 minutes to ensure equilibrium was
reached.
4. After agitating the solution biosorbent, the biosorbent was removed by
filtration through 0.45m membrane filter and filters.
5. Using the atomic spectrometry we can analyze the residual cadmium.
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Figure : Atomic Spectrometry
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CALCULATIONS
Where:
qe = adsorbent (leaves) phase concentration after equilibrium, mg
adsorbate/g adsorbent
Co = initial concentration of adsorbate,mg/L
Ce = final equilibrium concentration of adsorbate after absorption
has occurred, mg/L
V = Volume of liquid in the reactor, L
M = mass of adsorbent, g
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RESULTS
EFFECT OF CONTACT TIME ON THE REMOVAL OF CADMIUM
Figure 1: Effect of contact time on the removal of Cadmium by ULMUS Leaves and their ash
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Effect of PH on the removal of Cadmium
Figure 2: Effect of PH
on the removal of Cadmium by Ulmus Leaves and their ash
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Effect of Cadmium concentration on the removal
Figure 3: Effect of Cadmium concentration on the removal of Cadmium by Ulmus Leaves and their ash
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The effect of other metals on adsorptioncapacity
Figure 4: The effect of other metals on adsorption capacity
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ADVANTAGES AND DISADVANTAGES
ADVANTAGES
1. Cost effectiveness.2. High efficiency.
3. Minimization of chemical/biological sludg,
4. And regeneration of biosorbent with possibility of metal recovery.
DISADVANTAGES
1. Early saturation of biomass.
2. Little biological control over the characteristics of biosorbents.
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CONCLUSION
1. In this case study the removal efficiency of Cadmium was greater than
85%2. The adsorption of metal ion on tree leaves reached equilibrium in 60
min.
3. pH=6-7 and initial concentration of 2mg/L.
4. Compare ulms leaves and their ash ,ulmus leaves ash is more effective
than ulmus leaves
5. Analyzing all the result bisorption is an effective process for theremoval of ions
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REFERENCES
1. Hima Karnika, Srinivasa Reddy Ronda: Biosorption An-
ecofriendly alternative for heavy metal removal: Journal of
Biotechnology:6.2007, 2924
2931.
2. Nasi R. Bishnoi and Garima: Fungus An alternative for
bioremediation of heavy metals containing waste water: Journal
of Scientific & Industrial research: 64.2005.93100
3. Mahvi A.H., Gholami F, Nazmara S: Cadmium Biosorption formwaste water by Ulmus Leaves and their Ash:Journal of Scientific
Research:23:2008.197 - 203
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T H A N K Y O U
