文章摘要
廖月清, 陈明, 郑小俊, 邹杰平, 王军锋, 陈伟江, 王苗苗.模拟酸雨条件下生物炭配施沸石对江西某钨矿区Pb、Cd、W的淋溶效应[J].水土保持学报,2021,35(6):319~326
模拟酸雨条件下生物炭配施沸石对江西某钨矿区Pb、Cd、W的淋溶效应
Leaching Effect of Biochar and Zeolite on Pb, Cd and W in Tungsten Ore Area of Jiangxi Province Under Simulated Acid Rain Conditions
投稿时间:2021-06-30  
DOI:10.13870/j.cnki.stbcxb.2021.06.043
中文关键词: 土壤  沸石  生物炭  酸雨        淋溶
英文关键词: soil  zeolite  biochar  acid rain  tungsten  cadmium  lead  leaching
基金项目:国家重点研发计划项目(2019YFC1805100);国家自然科学基金项目(51664025);江西省科技厅重点研究计划项目(20192ACB70018);赣州科技计划项目(GSKF201850)
作者单位E-mail
廖月清, 陈明, 郑小俊, 邹杰平, 王军锋, 陈伟江, 王苗苗 稀有稀土资源开发与利用省部共建协同创新中心, 江西省矿冶环境污染与控制重点实验室, 江西理工大学资源与环境工程学院, 江西 赣州 341000 Jxlgdx@qq.com 
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中文摘要:
      为解决江西某钨矿区钨及其他重金属污染问题,通过室内模拟酸雨淋溶试验,研究在不同pH (3.1,4.5,5.8)酸雨条件下,添加稻壳生物炭(BC)、天然沸石(ZE)、稻壳生物炭—天然沸石(CO)改良剂对土壤Pb、Cd、W的固定效果。结果表明,酸雨增加了重金属的溶出风险,pH越低,风险越大。添加BC、ZE、CO有效提高土壤的酸缓冲能力,平均分别使得淋溶液pH增加0.53,0.23,0.58个单位,使得淋溶后土壤pH增加0.27,0.09,0.17个单位。在pH=4.5和pH=5.8模拟酸雨后,生物炭联合沸石处理Cd和Pb的淋溶总量明显低于未处理土壤,相较于空白分别降低32.1%,38.0%和36.0%,32.7%。W和Cd、Pb不同,在模拟酸雨pH=3.1条件下,添加改良剂对W淋溶总量均无显著影响,在模拟酸雨pH=4.5和pH=5.8时,单独施用生物炭处理使得W淋溶总量分别增加44.3,53.8 μg/L,但生物炭联合沸石处理使得W淋溶总量分别降低6.0,7.1 μg/L。综合来看,生物炭—沸石能更有效同时防止酸雨条件下污染土壤Pb、Cd、W的淋溶流失,可为后期钨矿区重金属污染防治提供参考。
英文摘要:
      To solve Jiangxi tungsten and other heavy metal pollution problems, an indoor simulated acid rain leaching test was conducted in this study. In the test, we studied the fixed effect of soil amendments such as rice husk biochar (BC), natural zeolite (ZE) and rice husk biochar-natural zeolite (CO) on the soil Pb, Cd and W under the conditions of acid rain with different pH (3.1, 4.5 and 5.8). The results showed that acid rain increased the leaching risk of heavy metals, and the lower the pH, the greater the risk. The addition of BC, ZE and CO effectively improved the acid buffering capacity of soil, and increased the pH of the leaching solution by 0.53, 0.23 and 0.58 units on average, respectively, and increased the soil pH by 0.27, 0.09 and 0.17 units on average after leaching. After leaching of simulated acid rain with pH=4.5 and pH=5.8, the total leaching amounts of Cd and Pb in CO treatment were significantly lower than those in untreated soil, and decreased by 32.1%, 38.0% and 36.0%, 32.7%, respectively, compared with untreated soil. W was different from Cd and Pb. Under the condition of simulated acid rain with pH=3.1, the addition of amendments had no significant effect on the total leaching amount of W. When the pH of simulated acid rain were 4.5 and 5.8, the total leaching amounts of W increased by 44.3 μg/L and 53.8 μg/L in the treatment of applying biochar alone, respectively. However, biochar combined with zeolite treatment reduced the total leaching amounts of W by 6.0 μg/L and 7.1 μg/L, respectively. In conclusion, biochar combined with zeolite could more effectively prevent leaching loss of Pb, Cd and W from contaminated soil under acid rain conditions, which could provide a reference for prevention and control of heavy metal pollution in tungsten ore areas.
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