ASSESSMENT OF RECLAIMED SOIL ENVIRONMENT QUALITY IN THE COALMINE CAVE-IN AREA
MA Jiu-yang;ZHU Jiang;ZHOU Jun;Ma Lai;LI Tao;YANG Hong-bo;School of Resources and Environment, Anhui Agricultural University;
Based on test of samples from reclaimed soil in the coalmine cave-in area, this paper studied the effect of contents of heavy metals of Cu, Zn, Cd, Hg, As, Pb and Cr on soil environment. The results indicate that according to one-factor pollution index method and Nemero comprehensive pollution index method, along with national soil environment quality standard, soil environment quality is good in the studied area, and on the whole reaches national class-2 standard, the category of safeness and cleanness; according to the Pollution-free Food and Vegetable Production Base Environment Conditions Standard, Green Food Production Base Environment Quality Standard and Organic Agricultural Production Base Environment Quality Standard, the soils in the studied area all meet the Green Food Production Base Environment Quality Standard. If a reasonable remediation method is applied to some slightly contaminated soils, all the soils in the studied area can meet the Organic Farm Production Base Environment Quality Standard. Based on hidden ecological hazard index RI analysis, hidden heavy metals hazard is relatively low and agricultural production has good development prospect in the reclaimed area.