文章摘要
蒋鑫,林大松,胡钧铭,李婷婷,刘顺翱,吴昊,韦翔华,赵茹.矿区Cd污染稻田生物炭生态原位钝化及Cd形态转化[J].农业环境科学学报,2024,43(5):1010-1016.
矿区Cd污染稻田生物炭生态原位钝化及Cd形态转化
Ecological in-situ passivation and morphological transformation of Cd in paddy fields in mining areas using biochar
投稿时间:2023-08-12  
DOI:10.11654/jaes.2023-0652
中文关键词: Cd污染稻田  原位钝化  Cd形态转化  生物炭  矿区
英文关键词: Cd-polluted rice field  in situ passivation  Cd morphological transformation  biochar  mining area
基金项目:农业农村部产地环境污染防控重点实验室开放基金项目(19cdhj-16);广西“新世纪十百千人才工程”专项资金项目(2018221);广西农业科学院创新团队项目(桂农科2021YT040)
作者单位E-mail
蒋鑫 广西大学农学院, 南宁 530004
广西农业科学院农业资源与环境研究所/广西耕地保育重点实验室, 南宁 530007 
 
林大松 农业农村部环境保护科研监测所, 天津 300191  
胡钧铭 广西农业科学院农业资源与环境研究所/广西耕地保育重点实验室, 南宁 530007 jmhu06@126.com 
李婷婷 广西农业科学院农业资源与环境研究所/广西耕地保育重点实验室, 南宁 530007  
刘顺翱 广西大学农学院, 南宁 530004
广西农业科学院农业资源与环境研究所/广西耕地保育重点实验室, 南宁 530007 
 
吴昊 广西壮族自治区环境保护科学研究院, 南宁 530223  
韦翔华 广西大学农学院, 南宁 530004  
赵茹 广西大学农学院, 南宁 530004
广西农业科学院农业资源与环境研究所/广西耕地保育重点实验室, 南宁 530007 
 
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中文摘要:
      为探究生物炭对矿区Cd污染稻田土壤原位钝化生态修复效果,进行稻田土壤Cd污染修复试验,设置海泡石(BC1)、生物炭(BC2)、空白对照(BC3)3种处理。采用梯度扩散薄膜(DGT)技术研究水稻根际土壤Cd生物有效性,明确其对水稻根际土壤Cd生物有效性和土壤Cd形态转化的影响。结果表明:生物炭影响矿区Cd污染稻田水稻根际土壤Cd形态比率。生物炭改变稻田土壤中Cd形态,明显提高土壤中残渣态Cd含量占比,提高幅度达27.84%,利于其他形态Cd向更稳定的残渣态转变。生物炭改变矿区Cd污染稻田水稻根际土壤Cd生物有效性。与空白对照相比,生物炭使水稻收获期的根际土壤Cd生物有效性降低了40.90%,土壤中有效态Cd含量降低了9.53%;海泡石处理的土壤Cd生物有效性比生物炭处理的土壤Cd生物有效性降低了83.90%,海泡石处理的土壤有效态Cd含量比生物炭处理的土壤有效态Cd含量降低了7.73%。生物炭可提升矿区Cd污染稻田土壤质量。生物炭改善了水稻土壤质量;与空白对照相比,生物炭处理的土壤有机质提高了6.75%,土壤阳离子交换量升高了8.44%,土壤pH值提升了7.44%;与海泡石对照相比,生物炭处理的土壤有机质提高了2.95%,土壤阳离子交换量升高了9.22%,土壤pH值降低了13.33%。研究表明,生物炭原位钝化能有效降低矿区Cd污染稻田土壤Cd生物有效性,提升生态修复水平。
英文摘要:
      A paddy soil Cd pollution remediation test was conducted to analyze the effects of in-situ passivation of biochar on ecological remediation of cadmium(Cd)-contaminated paddy soil in mining areas. Three treatments of sepiolite, biochar, and blank control were performed. The gradient diffusion film technique was used to study the bioavailability of Cd in rice rhizosphere soil and determine its effects on the bioavailability of Cd in rice rhizosphere soil and the transformation of soil Cd form. The results showed that:biochar input affected the Cd morphological ratio of rice rhizosphere soil in Cd-contaminated paddy fields. Biochar changed the form of Cd in paddy soil and significantly increased the proportion of residual Cd content in the soil by 27.84%, which was conducive to changes in other forms of Cd to a more stable residual state. Biochar changed the Cd bioavailability of rice rhizosphere soil in the Cd-contaminated paddy fields. Compared with that in the blank control, biochar reduced Cd bioavailability in rhizosphere soil by 40.90% and Cd content in the soil by 9.53%. Cd bioavailability in soil treated with sepiolite was reduced by 83.90% when compared with that in soil treated with biochar. The effective Cd content in soil treated with sepiolite was reduced by 7.73% compared to that in soil treated with biochar. Biochar improved the soil quality of Cd-polluted paddy fields in mining areas. Biochar improved rice soil quality. Compared with that in the blank control, the organic matter of the soil treated with biochar increased by 6.75%, the cation exchange capacity of the soil increased by 8.44%, and the pH value of the soil increased by 7.44%. Compared with that in the sepiolite control, soil organic matter after biochar treatment increased by 2.95%, cation exchange capacity increased by 9.22%, and soil pH value decreased by 13.33%. In-situ passivation of biochar could effectively reduce Cd bioavailability in Cd-contaminated paddy soil and improve the ecological restoration level.
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