Effective Remediation of Arsenic-Contaminated Soils by EK-PRB of Fe/Mn/C-LDH
Performance, Characteristics, and Mechanism
Bibliographic Data
| ID | 15478277 |
|---|---|
| Authors | Zongqiang Zhu (0000-0001-9107-5988, Guilin University of Technology), Shuai Zhou (0000-0002-7123-730X, Guilin University of Technology), Xiaobin Zhou (0000-0003-0504-3061, Guilin University of Technology, corresponding author), Shengpeng Mo (0000-0001-9896-3961, Guilin University of Technology), Yinian Zhu (0000-0002-3678-2476, Guilin University of Technology), Lihao Zhang (0000-0002-3543-914X, Guilin University of Technology), Shen Tang (0000-0002-4220-0225, Guilin University of Technology), Zhanqiang Fang (South China Normal University), Yinming Fan (0000-0003-0299-9674, Guilin University of Technology, corresponding author) |
| Year | 2022 |
| Volume | 19 |
| Issue | 7 |
| Pages | 4389-4389 |
| Publication date | 2022-04-06 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | International Journal of Environmental Research and Public Health (JOURNAL) |
| Journal identifiers | ISSN: 1661-7827 • E-ISSN: 1660-4601 |
| Publisher | Multidisciplinary Digital Publishing Institute (PUBLISHER • CH) |
| DOI | 10.3390/ijerph19074389 |
| PMID | 35410068 |
| OpenAlex | W4223488509 |
| Language | EN |
| References cited | 37 |
Arsenic is highly toxic and carcinogenic. The aim of the present work is to develop a good remediation technique for arsenic-contaminated soils. Here, a novel remediation technique by coupling electrokinetics (EK) with the permeable reactive barriers (PRB) of Fe/Mn/C-LDH composite was applied for the remediation of arsenic-contaminated soils. The influences of electric field strength, PRB position, moisture content and PRB filler type on the removal rate of arsenic from the contaminated soils were studied. The Fe/Mn/C-LDH filler synthesized by using bamboo as a template retained the porous characteristics of the original bamboo, and the mass percentage of Fe and Mn elements was 37.85%. The setting of PRB of Fe/Mn/C-LDH placed in the middle was a feasible option, with the maximum and average soil leaching toxicity removal rates of 95.71% and 88.03%, respectively. When the electric field strength was 2 V/cm, both the arsenic removal rate and economic aspects were optimal. The maximum and average soil leaching toxicity removal rates were similar to 98.40% and 84.49% of 3 V/cm, respectively. Besides, the soil moisture content had negligible effect on the removal of arsenic but slight effect on leaching toxicity. The best leaching toxicity removal rate was achieved when the soil moisture content was 35%, neither higher nor lower moisture content in the range of 25-45% was conducive to the improvement of leaching toxicity removal rate. The results showed that the EK-PRB technique could effectively remove arsenic from the contaminated soils. Characterizations of Fe/Mn/C-LDH indicated that the electrostatic adsorption, ion exchange, and surface functional group complexation were the primary ways to remove arsenic
Arsenic · Contamination · Environmental remediation · Leaching (pedology · Moisture · Soil contamination · Soil water · Water content · Chemistry · Concrete and Cement Materials Research · Electrokinetic Soil Remediation Techniques · Environmental Science · Geophysical and Geoelectrical Methods · Ecology · Environmental Chemistry · Environmental Engineering · Geology · Soil Science
| Highly cited | No |
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