ADSORPTION PROPERTIES OF MAGNETIC COCONUT SHELL FOR As（Ⅲ） IN SOIL LEACHING WASTEWATER

YANG Tao; CHEN Jingyu; SUN Xiaoshuang; HUANGFU Zhuoxi; YU Jiang

doi:10.13205/j.hjgc.202201013

Volume 40 Issue 1

Mar. 2022

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YANG Tao, CHEN Jingyu, SUN Xiaoshuang, HUANGFU Zhuoxi, YU Jiang. ADSORPTION PROPERTIES OF MAGNETIC COCONUT SHELL FOR As（Ⅲ） IN SOIL LEACHING WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 86-93. doi: 10.13205/j.hjgc.202201013

Citation:

YANG Tao, CHEN Jingyu, SUN Xiaoshuang, HUANGFU Zhuoxi, YU Jiang. ADSORPTION PROPERTIES OF MAGNETIC COCONUT SHELL FOR As（Ⅲ） IN SOIL LEACHING WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(1): 86-93. doi: 10.13205/j.hjgc.202201013

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ADSORPTION PROPERTIES OF MAGNETIC COCONUT SHELL FOR As（Ⅲ） IN SOIL LEACHING WASTEWATER

doi: 10.13205/j.hjgc.202201013

YANG Tao^1,3,
CHEN Jingyu^1,4,
SUN Xiaoshuang^1,3,
HUANGFU Zhuoxi^1,3,
YU Jiang^{1,2,3
,
,}

1. College of Architecture and Environment, Sichuan University, Chengdu 610065, China;
2. Institute of New Energy and Low Carbon Technology, Sichuan University, Chengdu 610065, China;
3. Yibin Institute of Industrial Technology, Sichuan University, Yibin 644000, China;
4. Nuclear Power Institute of China, Chengdu 610041, China

Received Date: 2021-04-07
Available Online: 2022-03-30
Publish Date: 2022-03-30

Abstract

Abstract

Leaching technology is one of the mainstream technologies for remediation of soil heavy metal(metal-like) pollution, but the risk of secondary contamination in leaching waste liquid is the main factor restricting its application. This study explored the best adsorption conditions and removal effect of As(Ⅲ) in soil leaching wastewater through solvent deposition of magnetic coconut shell(MCS) prepared by the modified materials. XPS, SEM analysis results showed that magnetic materials could be successfully loaded on the coconut. EDS, FT-IR analysis showed that the As(Ⅲ) could be effectively adsorbed by MCS material. We used the pseudo-second-order kinetic model and Freundlich model to simulate the MCS for the As(Ⅲ) adsorption process, and found that the adsorption process was multilayer adsorption behavior and dominated by chemical adsorption, and the complexation of hydroxyl, carboxyl and iron-containing groups on As(Ⅲ) was the main mechanisms of the adsorption. The removal efficiency of As(Ⅲ) in actual leaching waste water could reach 96.58% under the condition of MCS dosage of 20 g/L, pH of 9 and adsorption time of 120 min. The final content of As(Ⅲ) in the leaching waste water treated by MCS was lower than the discharge limit specified in the Integrated Waste Water Discharge Standard, GB 8978—1996(As≤0.5 mg/L). In conclusion, MCS is an effective adsorption material for the treatment of As(Ⅲ) contaminated soil leaching liquid.
- magnetic coconut shell(MCS),
- leaching waste water,
- As(Ⅲ),
- adsorption

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References(37)

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