ARENIC IMMOBILIZATION IN SOIL USING IRON/TITANIUM COMPOSITE

YAN Xiuyi; GU Zhibin; LI Zhimeng; QIN Yu; DENG Meng

doi:10.13205/j.hjgc.202308023

Volume 41 Issue 8

Aug. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(8): 181-187

YAN Xiuyi, GU Zhibin, LI Zhimeng, QIN Yu, DENG Meng. ARENIC IMMOBILIZATION IN SOIL USING IRON/TITANIUM COMPOSITE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 181-187. doi: 10.13205/j.hjgc.202308023

Citation:

YAN Xiuyi, GU Zhibin, LI Zhimeng, QIN Yu, DENG Meng. ARENIC IMMOBILIZATION IN SOIL USING IRON/TITANIUM COMPOSITE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 181-187. doi: 10.13205/j.hjgc.202308023

YAN Xiuyi, GU Zhibin, LI Zhimeng, QIN Yu, DENG Meng. ARENIC IMMOBILIZATION IN SOIL USING IRON/TITANIUM COMPOSITE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 181-187. doi: 10.13205/j.hjgc.202308023

Citation:

YAN Xiuyi, GU Zhibin, LI Zhimeng, QIN Yu, DENG Meng. ARENIC IMMOBILIZATION IN SOIL USING IRON/TITANIUM COMPOSITE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(8): 181-187. doi: 10.13205/j.hjgc.202308023

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ARENIC IMMOBILIZATION IN SOIL USING IRON/TITANIUM COMPOSITE

doi: 10.13205/j.hjgc.202308023

College of Chemical Engineering and Environment, China University of Petroleum (Beijing), Beijing 102249, China

Received Date: 2022-08-11
Available Online: 2023-11-15

Abstract

Abstract

At present, immobilization is one of the most common remediation methods for arsenic-contained soil. Reasonable selection of immobilization reagents is very important in soil immobilization remediation. According to the characteristics of arsenic in soil, this study synthesized Fe/Ti composite material and the modified Fe/Ti composite material by biochar, to explore the effect of immobilization of arsenic in soil, respectively. The adsorption isothermal model and adsorption kinetics model was used to study the adsorption characteristics. The experimental results showed that the adsorption effect of biochar-modified Fe-Ti composite material was better than that of Fe-Ti composite material. The Elovich model was found to be the best kinetics model in fitting the adsorption process, indicating that the adsorption of trivalent arsenic by the two materials was mainly chemical adsorption. The Freundlich isothermal adsorption model was the best model in the adsorption isothermal experiment, which showed that the adsorption of trivalent arsenic on the surface of the two materials was heterogeneous multimolecular adsorption and monolayer adsorption, including physical and chemical adsorption. These two adsorbents can effectively adsorb arsenic in soil, and the maximum adsorption amount is 48.63 and 61.09 mg/g, respectively. By adding biochar, the adsorption rate of the material can be effectively improved, rapid stabilization of arsenic in soil can be achieved, and the immobilization effect of arsenic is higher under different water contents in soil. It can provide a reference for arsenic removal from soil by biochar-modified iron titanium composite.
- soil arsenic pollution,
- Fe/Ti composite material,
- Fe/Ti biochar composite material,
- leaching toxicity,
- adsorption isothermal model

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References(28)

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