Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5747853 | Ecotoxicology and Environmental Safety | 2018 | 6 Pages |
Abstract
Batch sorption and leaching of arsenic (1-30 mg Lâ1) on Fe-sericite composite powder and beads were investigated in this study. Fe-sericite composite powder was made from natural sericite modified with iron, and alginate was used to transform the powder into beads. The maximum sorption capacities of the Fe-sericite composite powder (15.04 and 13.21 mg gâ1 for As(III) and As(V), respectively) were higher than those of the corresponding beads (9.02 and 7.11 mg gâ1 for As(III) and As(V), respectively) owing to the higher specific surface area of the powder. In addition, the leaching amounts of As(III) from Fe-sericite composite beads (⤠15.03%) were higher than those of the corresponding powder (⤠5.71%). However, acute toxicity of As(III)-sorbed Fe-sericite composite beads toward Daphnia magna was not significantly different from that of the corresponding powder (p > 0.05). Considering higher uptake of the powder particles by the daphnids, Fe-sericite composite beads seem to be a more appropriate and safer sorbent for arsenic removal in practical application. Based on Fe content, Fe-sericite composite beads had similar or higher maximum sorption capacities (71.19 and 56.11 mg gâ1 Fe for As(III) and As(V), respectively) than those of previously reported sorbents.
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Authors
Jiwon Kim, Cheongho Lee, Seung Mok Lee, Lalhmunsiama Lalhmunsiama, Jinho Jung,