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Novel approach to control adsorbent aggregation: iron fixed bentonite-fly ash for Lead (Pb) and Cadmium (Cd) removal from aqueous media 被引量:5
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作者 Teza Mwamulima Xiaolin Zhang +2 位作者 Yongmei Wang Shaoxian Song Changsheng Peng 《Frontiers of Environmental Science & Engineering》 SCIE EI CAS CSCD 2018年第2期17-28,共12页
In the present study, a novel approach was used to control zero valent iron aggregation and separation problems by fixing zero valent iron (ZVI) on bentonite-fly ash pellets. For this purpose, porous low cost benton... In the present study, a novel approach was used to control zero valent iron aggregation and separation problems by fixing zero valent iron (ZVI) on bentonite-fly ash pellets. For this purpose, porous low cost bentonite-fly ash (BFA) pellets with size of 2.00 cm in length and 0.35 cm in diameter were prepared and fixed with ZV1 to manufacture zero valent iron bentonite-fly ash (ZVI-BFA) pellets. Importantly, unlike powdered adsorbents, ZVI-BFA can easily be separated from final effluents when exhausted without any disintegration. The performance of the developed novel adsorbent was investigated for the removal of Pb2+ and Cd2+ from aqueous media. At 100 mg.L I and 1 g adsorbent, a maximum of 89.5% ofCd2+ and 95.6% ofPb2+ was removed by ZVI-BFA as compared to 56% and 95% removal by BFA. At 200 mg.L 10 Cd2+ and Pb2+ removal by ZVI-BFA was 56% and 99.8% respectively as compared to only 28% and 96% by BFA. Further, the removal kinetics was best fitted for pseudo-second order model. The study provides the basis for improving the removal capacity of porous materials by iron fixation while taking separation ability into consideration. 展开更多
关键词 zero valent ironbentonitefly ashheavy metals removalsynthesis
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