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| Stabilization effects and ecological impacts on As and heavy metal co-contaminated soils stabilized by Fe-Mn binary oxides |
| Received:August 01, 2016 |
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| KeyWord:Fe-Mn binary oxides(FMBO);stabilization;heavy metal;seed germination;microbial diversity |
| Author Name | Affiliation | E-mail | | FEI Yang | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Beijing 100101, China
University of Chinese Academy of Sciences, Beijing 100049, China | | | YAN Xiu-lan | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Beijing 100101, China | yanxl@igsnrr.ac.cn | | LIAO Xiao-yong | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Beijing 100101, China | | | LI Yong-hua | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Beijing 100101, China | | | LIN Long-yong | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Beijing 100101, China
Guangdong Provincial Academy of Environmental Science, Guangzhou 510045, China | | | SHAN Tian-yu | Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
Beijing Key Laboratory of Environmental Damage Assessment and Remediation, Beijing 100101, China
University of Chinese Academy of Sciences, Beijing 100049, China | |
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| Abstract: |
| In this article, laboratory culture experiments were carried out to investigate the stabilization effects and ecological impacts on three As and heavy metal co-contaminated soils stabilized by Fe-Mn binary oxides(FMBO). In the extraction experiments, the results showed that FMBO could reduce the concentration of available As and heavy metals in the soils, which could decrease 93.7%~100%, 30.8%~57.8%,81.3%~95.0%,66.7%~95.3%,55.8%~100% of available As, Pb, Cd, Zn, Cu after adding FMBO under 5% mass percentage dosage. In the seed germination experiments, the results showed that under 0%~2.5% mass percentage dosage, FMBO could reduce the toxic effects of As and heavy metals on the growth and development of plants in the soils.Under 2.5% mass percentage dosage, the seed germination rate, root length, seedling length could reach 86%~92%, 7.25~9.09 cm, 8.62~9.91 cm respectively, which were the best of all treatments. But when the FMBO addition reached 5%, it could inhabit the germination and growth of the wheat seeds due to Mn2+ releasing. In addition, FMBO could reduce the soil microbial diversity slightly and change the microbial community composition of the three contaminated soils. In conclusion, stabilization effectiveness and ecological impacts should be considered simultaneously before field trials to determine the optimal addition of the remediation materials. |
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