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| Stabilization of Pb in contaminated soil using zeolite-struvite composites |
| Received:June 03, 2016 |
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| KeyWord:struvite, artificial zeolite, heavy metal, soil, stabilization |
| Author Name | Affiliation | E-mail | | ZHANG Zhi-hao | State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China | | | CHEN Jie | State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
Shanghai Hydraulic Engineering Group Company Limited, Shanghai 201612, China | | | XIA Peng | State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China | | | WANG Hao | State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China | | | WANG Xue-jiang | State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China | wangxj@tongji.edu.cn | | ZHAO Jian-fu | State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China | |
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| Abstract: |
| Azeolite-struvite composites(Zeo-str material) was recovered in simulated wastewater and applied to stabilize Pb in soil. The stabilization effect of it was explored by SEM/EDS and XRD characterization, extraction of the available heavy metal, modified BCR sequential extraction procedures, enzymatic activity analysis, etc. The results showed that Zeo-str material mostly was the struvite loaded ammonium saturated zeolite and it performed better ability of stabilizing Pb than zeolite. After applying Zeo-str material into Pb contaminated soil at the dosage of 10% in 28 days, the fraction of exchangeable Pb decreased 83% while reducible Pb and residual Pb fractions increased 8.7 and 2.5 times respectively, and sucrose enzyme activity increased while catalase activity decreased due to the stabilization of Pb in soil. In conclusion,Pb in soil can be stabilized by Zeo-str material, thus achieving resource utilization of waste. |
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