铜陵矿集区土壤Cu缓变型地球化学灾害研究  

Study on Cu-gradient Geochemical Disasters in Soil of Tongling Ore

作　　者：杨善谋 黄博[1] Yang Shanmou;Huang Bo(Anhui Geophysical and Geochemical Exploration Technology Institute, Hefei 230009, Anhui, China)

机构地区：[1]安徽省地球物理地球化学勘查技术院

出　　处：《农业技术与装备》2019年第8期26-27,29,共3页Agricultural Technology & Equipment

摘　　要：文章根据缓变型地球化学灾害(DGH)模型,研究了铜陵金属矿集区凤凰山地区土壤中Cu的缓变型地球化学特征。结果表明:在pH为5.0、5.0~2.0时,其缓变型地球化学灾害临界点分别为222.22 mg·kg^-1、81.68 mg·kg^-1,爆发点分别为438.75 mg·kg^-1、384.99 mg·kg^-1。随着酸性程度的增强,具有爆发Cu缓变型地球化学灾害可能的区域面积增大,临界点和爆发点均提前。地球化学背景异常和矿业开发的人为活动导致土壤重金属长期输入;酸雨和矿业的酸性排水引起土壤理化性质的改变;环境容量变小等因素是DGH的主要原因。In this paper, according to delayed geochemical hazards model,we have researched the soil Cu elements delayed geochemical characteristics in Fenghuangshan district, Tongling mining area. The results show that: in the pH of 5.0, 5.0~2.0, burst critical point of delayed geochemical hazards is 222.22 mg·kg^-1, 81.68 mg·kg^-1 respectively and burst point of delayed geochemical hazards is 438.75 mg·kg^-1, 384.99 mg·kg^-1 respectively;at the same time, As the acidity increasing, the size of the region with probability of the outbreak of Cu-based delayed geochemical hazards enlarged, burst critical point and burst point are ahead of schedule, while soil quality evaluation process in the lower soil Cu content also need to attract sufficient attention;Abnormal geochemical background and man-made activities in mining development lead to long-term input of heavy metals in soils;acid rain and acid drainage in mining cause changes in soil physical and chemical properties;environmental capacity is smaller and other factors are the main cause of DGH.

关 键 词：DGH 重金属元素 铜陵 土壤 

分 类 号：X53[环境科学与工程—环境工程]