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• W2077183665 abstract "Highly stable Fe–Pd bimetallic nanoparticles were prepared with 0.2% (w/w) of sodium carboxylmethylcellulose (CMC) as a stabilizer. The effectiveness of the stabilized Fe–Pd nanoparticles was studied for degradation of two chlorinated pesticides (lindane and atrazine) under aerobic and anaerobic conditions. Batch kinetic tests showed that under anaerobic condition the nanoparticles can serve as strong electron donors and completely reduce 1 mg l−1 of lindane at an iron dose of 0.5 g l−1 or 1 mg l−1 of atrazine with 0.05 g l−1 iron with a trace amount (0.05–0.8% of Fe) of Pd as a catalyst. In contrast, under aerobic condition, the nanoparticles can facilitate Fenton-like reactions, which lead to oxidation of 65% of lindane under otherwise identical conditions. Under aerobic condition, the presence of CMC reduced the level of hydroxyl radicals generated from the nanoparticels by nearly 50%, and thus, inhibited the oxidation of the contaminants. While the particle stabilization greatly enhanced the anaerobic degradation, it did not appear to be beneficial under aerobic condition. The degradation rate was progressively enhanced as the Pd content increased from 0.05% to 0.8% of Fe, and the catalytic effect of Pd was more significant under anaerobic condition. Under anaerobic condition, lindane is degraded via dihaloelimination and dehydrohalogenation, whereas atrazine is by reductive dechlorination followed by subsequent reductive dealkylation. Under aerobic condition, reactive oxygen species and hydroxyl radicals from the iron nanoparticles are responsible for oxidizing the pesticides. Lindane is oxidized via dechlorination/dehydrohalogenation, whereas atrazine is destroyed through dealkylation of the alkylamino side chain." @default.
• W2077183665 created "2016-06-24" @default.
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• W2077183665 date "2008-01-01" @default.
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• W2077183665 title "Destruction of lindane and atrazine using stabilized iron nanoparticles under aerobic and anaerobic conditions: Effects of catalyst and stabilizer" @default.
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• W2077183665 doi "https://doi.org/10.1016/j.chemosphere.2007.06.070" @default.
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