云南省者竜—嘎洒地区Cr、Ni地球化学特征及土壤污染风险防控建议

吴松, 陈政, 李元彬, 黄钊, 张林, 许胜超, 王开贵

Cr and Ni geochemistry and some suggestions on soil pollution risk prevention control in the Zhelong-Gasa area, Yunnan Province

WU Song, CHEN Zheng, LI Yuan-Bin, HUANG Zhao, ZHANG Lin, XU Sheng-Chao, WANG Kai-Gui

表4 不同土地利用类型Cr污染风险评估

Table 4 The risk assessment of chromium pollution of different land use types

土地 利用现状 酸碱度(pH) 样品数 Cr平均值/10-6 污染风险筛选值/10-6 超标样数 超标率/% 水田 pH≤5.5 1033 90 250 0 0 5.5<pH≤6.5 1084 101.3 250 0 0 6.5<pH≤7.5 355 121.2 300 0 0 7.5<pH 96 119.5 350 0 0 旱地 pH≤5.5 1337 129.5 150 0 0 5.5<pH≤6.5 301 258 150 84 27.9 6.5<pH≤7.5 74 131.5 200 0 0 7.5<pH 9 106 250 0 0 园地 pH≤5.5 1450 108.9 150 0 0 5.5<pH≤6.5 1345 109.8 150 0 0 6.5<pH≤7.5 721 109.3 200 0 0 7.5<PH 264 110.9 250 0 0 林地 pH≤5.5 1165 144.1 150 0 0 5.5<pH≤6.5 212 284.1 150 27 12.7 6.5<pH≤7.5 66 89.6 200 0 0 7.5<pH 40 85 250 0 0 草地 pH≤5.5 165 286.8 150 66 40 5.5<pH≤6.5 26 1647.4 150 15 57.7 6.5<pH≤7.5 5 391.7 200 2 40