叙永县落卜硫铁矿矿山土壤环境治理效果研究

川南地区广泛分布无序开采的硫铁矿矿山,早期开采方式导致土壤酸化、重金属含量高等环境问题出现,2012年政府集中治理连片矿山地质环境恢复问题。研究了落卜硫铁矿矿区的土壤使用石灰和零散坡耕地整治对土壤酸化、重金属钝化修复效果。通过野外调查、采样分析测试、对比综合评价等方法证明,向土壤中投放石灰可以有效改善土壤酸化。在治理区76.6%土壤p H由酸性变为中性或者弱碱性土壤;石灰和零散坡耕地整治区土壤重金属As、Hg、Pb、Zn等含量下降率达50.0%~93.8%不等,但对Cd、Cu、Ni修复效果有限。

Study on Soil Environment Remediation Effect of Luobu Pyrite Mine in Xuyong County

Disordered Pyrite mines with are widely distributed in Southern Sichuan.The early mining method of pyrite resulted in soil acidification and high content of heavy metals.The government has carried out the restoration and management of mine geological environment for concentrated and continuous mine distribution area in 2012.In this paper,the remediation effect of lime and scattered sloping land on soil acidification and heavy metal passivation in Luobu pyrite mining area.Through field investigation,sampling analysis,testing,and comparative comprehensive evaluation,it is proved that adding lime into soil can effectively improve the soil acidification.In the study area,76.6% of soil pH changed from acid to neutral or weakly alkaline after treatment.The contents of heavy metals,such As,Hg,Pb,and Zn decreased by 50.0%~93.8% after the remediation of lime and scattered sloping land,but the remediation effect on Cd,Cu and Ni was limited.