汞矿周边农田蔬菜生物碳阻控汞富集和转运的效果  

Accumulation and transport of mercury by vegetables under biocarbon inhibition in the farmland experiment

作　　者：荆秀艳[1] 董强飞 齐佳华 JING Xiuyan;DONG Qiangfei;QI Jiahua(College of Geology and Environmental Engineering,Xi’an University of Science and Technology,Xi’an 710054,China;Shanxi Geological and Mineral Third Team Co.Ltd.,Baoji 721300,China)

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054 [2]陕西地矿第三地质队有限公司,陕西宝鸡721300

出　　处：《甘肃农业大学学报》2024年第2期233-239,249,共8页Journal of Gansu Agricultural University

基　　金：陕西省土壤污染防治专项“旬阳县汞污染农田土壤污染治理与修复技术应用试点项目钝化技术”(60002001001)。

摘　　要：【目的】探究生物碳钝化汞污染土壤的效果。【方法】设置低、中、高3种汞污染土壤区,分别施加1000 kg/667 m^(2)生物碳,探讨瓜果、根茎类农田蔬菜生物碳阻控汞富集和转运效果。【结果】生物碳施加后,蔬菜对汞的转运表现为根部富集最高,向茎、叶、果实部位依次减弱,大小顺序为:丝瓜>豆角>茄子>辣椒>豇豆>黄瓜,富集系数分别降低了53.3%、20.6%、14.7%、10.5%和8%,豆角和豇豆阻控作用最为明显,而辣椒最弱;土壤汞含量会影响阻控效果,豆角、黄瓜、豇豆分别在低、中和高汞土壤中阻控效果最好,汞浓度对丝瓜影响最小。【结论】生物碳能针对不同蔬菜对汞的富集起到一定阻控作用,其结果可为钝化修复汞污染土壤的实际应用提供理论依据。【Objective】To investigate the effect of bio-carbon on the remediation of Hg contaminated soils.【Method】We used 1000 kg/667m^(2) biocarbon to inactivate Hg from mining soils with low,medium and high mercury contamination to investigate the effect of mercury accumulation and transport in fruits and rhizomes of vegetables.【Result】The Hg content was highest in the roots of the vegetables,then the transfer to the stems,leaves and fruits gradually decreased after the application of biochar.The order of transfer capability was as follows:loofah>beans>eggplant>pepper>cowpea>cucumber.Compared to no biochar,the enrichment coefficient decreased by 53.3%,20.6%,14.7%,10.5%and 8%,respectively.Thus,faba bean and cowpea showed the most pronounced inhibitory effect on Hg,while capsicum was the weakest.On the other hand,bean,cucumber and cowpea had the best effect on low,medium and high mercury soils,but had little effect on loofah.【Conclusion】The biocarbon control of mercury accumulation in different vegetables can provide theoretical basis and technical reference for practical application of remediation of mercury contaminated soil.

关 键 词：汞 生物炭 土壤汞污染 富集与转运 钝化修复 

分 类 号：X703.5[环境科学与工程—环境工程]