BENTONITE G 150
Launching July´15
• Greek fungus “Mykes” and Latin poison “Toxicum”
• 1000 years from “St. Anthony’s fire” until the death of 100.000 turkeys in the UK due to “Aflatoxin” in
1960
• Feed born toxins present in the main crops. Natural contaminants
• Complete elimination of mycotoxins is very unlikely
• Potential threat to human and animal health
• Combined strategies are required to minimise the
risk of transference through the feed – food chain
MYCOTOXINS Historical notes
• A food safety, animal performance and health concern
• A lot of research during the last 30 years
• One of the most recognised feed chain contaminants
• Hundreds of mycotoxins identified
• Aflatoxin identified as a potent carcinogen (IARC)
• Important economical impact
• Maximum limits established for AB1 and OTA
• The EU is the most restrictive. US AFB1 x 10
• Criteria and controls not harmonised – Risk!
• Functional group in the UE
MYCOTOXINS Today
MYCOTOXINS CE 1060/2013
MYCOTOXINS CE 1060/2013
• Aflatoxins (B1, B2, G1, G2, M)
Fungi: Aspergillus flavus and A. parasiticus
• Ochratoxin A (OTA)
Fungi:Aspergillus ochraceus and Penicillium verrucosum
• Fumonisins (FB1+B2)
Fungi: Fusarium verticillioides and F. proliferatum:
• Zearalenone (ZEA), Deoxynivalenol (DON), & Trichothecens
Fungi: Fusarium graminearium
• T2 Toxin
Fungi: Fusarium sporotrichioides
MYCOTOXINS OF CONCERN IN
ANIMAL FEED
DNA, RNA
damage
Protein
Synthesis
Lipid
Peroxidation
Cell membrane
disruption Cell cycle
alteration
Cell death
Toxicity: Liver, kidney, nerves, genes
Immunosuppression
Reduced performance and health
TOXICITY MECHANISM OF
MYCOTOXINS
• AFLATOXINS are the most dangerous mycotoxins – legal maximums established
• DON, ZEA and Fumonisin B1 are not very toxic but they are very frequently detected. Not important carry over into milk, meat and eggs, but impact on animal performance and health – Recommended maximum established
MYCOTOXIN MENACE IN
ANIMAL FEEDING
LEGAL MAXIMUM CONTENTS
AFLATOXIN B1, EU Dir 2002/32 & 2003/100
Feedstuff
12% moisture
Maximum, µg/kg (ppb)
All feed materials 20
Complete feedstuffs:
- Cattle, sheep and goats (except dairy, calves and lambs)
- Dairy cattle
- Calves and lambs
- Pigs and poultry (except young animals)
- Young animals and other complete feedstuffs
20
5
10
20
10
Complementary feedstuffs:
- Cattle, sheep and goats (except dairy, claves and lambs)
- Pigs and poultry (except young animals)
- Other complementary feedstuffs
20
20
5
LEGAL MAXIMUM CONTENTS
AFLATOXIN B1, EU Dir 2002/32 & 2003/100
Mycotoxin
FOOD
Maximum,
µg/kg (ppb)
AFM1(*)
- Milk
- Infant formulae and milk
0.05
OTA(**)
Pork kidney
10*
20**
1 Reg. 1881/2006/CE 2 National Reg. Denmark: *Viscera condemned, ** Carcass condemned
Physical methods: Cleaning, sorting, thermal, wet milling… Incomplete or expensive
“Binders”: Economical but variable efficacy
Chemical methods: alkali, acid, ammonium, additives, ozonation… Effective against fungi, variable efficacy against toxins or expensive
Microbiological methods: Ethanol fermentation (bio-fuels): Possible increase in mycotoxin concentration: AFB1, ZEA, FB1…
Dietary interventions: Effective reducing mycotoxin toxicity: Vitamins, AAs, antioxidants, bioflavonoids, enzymes…+ Combinations with mycotoxin binders
STRATEGIES AGAINST CARRY OVER OF FEED
MYCOTOXINS
FAO 1999, EFSA, 2009
70% of the products described by EFSA against mycotoxins in feed are “Binders”
More than 50% of the “Binders” are “Clays” or clay based products
Differences among clays are essential for understanding their efficacy and mode of action
MYCOTOXIN ABSORBING
AGENTS BINDERS
• Structural differences are due to:
Genesis
Chemical composition
Isomorphus substitutions
• Structural differences confere: Specific characteristics
Special properties
STRUCTURAL DIFFERENCES
AMONG CLAYS
Phyllosilicate 2:1
Surface area: 50-120 m2/g
CEC: 50-150 mEq/100g
Exchangeable cations: Ca2+, K+, Na+
Swelling capacity (Na+ smectite)
Hydrophyllic surface
Uses
Absorbent
Rheological additive
Binder
SMECTITE (Bentonite)
Mx(Al,Fe,Mg)4(Si,Al)8O20(OH)
4
Surface area (SA): Clays have very large SA. The greater the SA the better adsorption of mycotoxins
Active centres (AC): points for active sorption of cations. A proper number of AC should exist on the surface for effective and irreversible adsorption of mycotoxins. Usually occupied by cations (Na, K Ca, Mg) and measured by the cation exchange capacity
Cation exchange capacity (CEC): Number of cations readily exchangeable. Required for stable binding of mycotoxins
Charge Density (CD): Number of cations per unit of surface area
ESSENTIAL FEATURES OF CLAYS
AGAINST MYCOTOXINS
An adequate charge density is essential
for effective protection against mycotoxins
without interferences with nutrients
DIFFERENTIAL ASPECT OF MYCOTOXIN
BINDERS - SILICATES Mg Silicates Al Silicates
Sepiolite
Mg
Bentonite
Ca
Bentonite
Na
Bentonite
Natural
Zeolite
Synthetic
Zeolite
Surface
area, m2/g 350 120 70 60 50 500
C.E.C. meq/100g
15 60 90 120 200 500
Charge
density*
CEC/SA
0.05
0.5
1.5
2
4
1
Example EXAL BENTONITE
G-150
Novasil, H
SCAS
Others Clinopti-
lolite
Zeolite-A
Effective adsorption and no desorption
No interference with nutrients and additives
Safe for the user, animal and environment
Easy to handle
Economical
REQUIREMENTS FOR A GOOD
MYCOTOXIN BINDER
BENTONITE G 150:
1m558i NATURAL MYCOTOXIN BINDER
MINE: Selective mining after exhaustive control of raw mineral
Drill sampling: Mineralogical composition and contaminants
Extraction of selected raw mineral
Coarse grinding in site to homogenize the raw mineral
Distribution on homogeneous stacks of 50 cm depth
Activation: watering and sun drying cycles to increase swelling
Activated raw mineral sampling: Traceability and quality controls
FACTORY: Purification and re – activation
Grinding and classification: Purification
Fluid bed heat drying: Re – activation to increase adsorption
BENTONITE G 150 packaging and sampling for quality controls
BENTONITE G 150:
1m558i NATURAL MYCOTOXIN BINDER
BENTONITE G 150:
1m558i NATURAL MYCOTOXIN BINDER
BENTONITE G 150:
1m558i NATURAL MYCOTOXIN BINDER
BENTONITE G 150:
1m558i NATURAL MYCOTOXIN BINDER
BENTONITE G 150:
1m558i NATURAL MYCOTOXIN BINDER