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Chemical and toxicological assessment of arsenic sorption onto Fe-sericite composite powder and beads
- Source :
- Ecotoxicology and Environmental Safety. 147:80-85
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Batch sorption and leaching of arsenic (1-30mgL-1) 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 13.21mgg-1 for As(III) and As(V), respectively) were higher than those of the corresponding beads (9.02 and 7.11mgg-1 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 56.11mgg-1 Fe for As(III) and As(V), respectively) than those of previously reported sorbents.
- Subjects :
- Sorbent
Alginates
Arsenites
Surface Properties
Iron
Health, Toxicology and Mutagenesis
Composite number
0211 other engineering and technologies
chemistry.chemical_element
02 engineering and technology
010501 environmental sciences
Sericite
01 natural sciences
Water Purification
Adsorption
Glucuronic Acid
Specific surface area
Toxicity Tests, Acute
Animals
Particle Size
Arsenic
0105 earth and related environmental sciences
021110 strategic, defence & security studies
Chromatography
Chemistry
Hexuronic Acids
Public Health, Environmental and Occupational Health
Sorption
General Medicine
Models, Theoretical
Silicon Dioxide
Pollution
Daphnia
Arsenates
Leaching (metallurgy)
Powders
Water Pollutants, Chemical
Nuclear chemistry
Subjects
Details
- ISSN :
- 01476513
- Volume :
- 147
- Database :
- OpenAIRE
- Journal :
- Ecotoxicology and Environmental Safety
- Accession number :
- edsair.doi.dedup.....6aa44757ce6e88e35c1165b8324c5d22