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
荆秀艳 1董强飞 1齐佳华2
作者信息
- 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
- 折叠
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1 000 kg/667 m2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.
Abstract
[Objective]To investigate the effect of bio-carbon on the remediation of Hg contaminated soils.[Method]We used 1 000 kg/667m2 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 trans-fer 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 mer-cury soils,but had little effect on loofah.[Conclusion]The biocarbon control of mercury accumulation in dif-ferent vegetables can provide theoretical basis and technical reference for practical application of remedia-tion 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Key words
mercury/biochar/soil mercury pollution/enrichment and transport/passivation remediation引用本文复制引用
基金项目
陕西省土壤污染防治专项(60002001001)
出版年
2024
NETL
NSTL
维普
万方数据