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| Effects of different passivation materials on the remediation of copper-contaminated soil |
| Received:January 15, 2018 |
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| KeyWord:soil copper;passivation material;rape(Brassica napus L.);immobilization |
| Author Name | Affiliation | E-mail | | LIU Na | Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China | | | XUE Zhong-jun | Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China | | | YE Wen-ling | Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China | | | HU Hong-xiang | Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China | hongxianghu@163.com | | XU Nian | Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China | | | FU Xiao-fei | Anhui Province Key Laboratory of Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China | |
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| Abstract: |
| In order to compare the effects of different passivation materials on the remediation of copper-contaminated soil, a field experiment was conducted to investigate the effects of calcium-based passivation materials (apatite, lime), organic passivation materials (biological humic acid agent, bioorganic fertilizer), and silicon-based passivation material (new porous ceramic nanomaterial) on the physicochemical properties of copper-contaminated soil, the available copper concentration of copper-contaminated soil, rape growth, and copper uptake by rape. The results showed that the soil pH significantly increased with the application of calcium-based and silicon-based passivation materials compared with conventional fertilization (the control). Organic materials were more effective than the other two materials in increasing the soil nutrient contents (except for soil available phosphorus). In addition, soil available copper content significantly decreased with the application of different passivation materials (28.65%~36.66% lower than the control), and copper accumulation in rape seeds was effectively inhibited (33.84%~46.03% lower than the control). With the application of calcium-based material, available copper content and copper accumulation showed the largest reductions of 36.66% and 46.03%, respectively. With the application of calcium-based materials, the rape yield increased by 7.43% compared to that of the control, but the rape yield decreased with the application of organic materials and silicon-based material. These results indicate that application of calcium-based materials (especially lime) may improve rape yield by significantly increasing soil pH and reducing copper bioavailability in acid soil. |
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