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5 调查区不同土地利用类型Ni污染风险评估

Table 5 The risk assessment of nickele pollution of different land use types in the survey area

土地利用 现状 酸碱度 样品数 Ni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 32.2 60 0 0 5.5<pH≤6.5 1084 39.7 70 0 0 6.5<pH≤7.5 355 52.1 100 0 0 7.5<pH 96 56.8 190 0 0 旱地 pH≤5.5 1337 55.5 60 0 0 5.5<pH≤6.5 301 183.9 70 90 29.9 6.5<pH≤6.5 74 76.9 100 0 0 7.5<pH 9 54.2 190 0 0 园地 pH≤5.5 1450 39.7 60 0 0 5.5<pH≤6.5 1345 43.8 70 0 0 6.5<pH≤7.5 721 42.1 100 0 0 7.5<pH 264 46.6 190 0 0 林地 pH≤5.5 1165 52.1 60 0 0 5.5<pH≤6.5 212 202.8 70 31 14.6 6.5<pH≤7.5 66 38.3 100 0 0 7.5<pH 40 33.2 190 0 0 草地 pH≤5.5 165 104.9 60 38 23 5.5<pH≤6.5 26 1247 70 16 61.5 6.5<pH≤7.5 5 312.5 100 2 40