评价区土壤及底泥环境质量现状评价.docx

评价区土壤及底泥环境质量现状评价（1）样品的采集及分析测试2013年12月，本溪市环境监测中心站对思山岭铁矿采选工程土壤及底泥环境质量进行了现状监测。本项目区域内土壤及底泥监测点位、监测因子以及监测方法见表9.1-10和表9.1-11；见监测布点图9.1-10。表9.1-10 土壤、底泥监测点位及监测因子编号样品位置土壤、底泥监测项目1#废石场最高标高上游50m土壤镉、总汞、总砷、铜、铅、总铬、锌、镍、铁、锰、pH2#废石场后塔沟上游100m土壤、底泥3#废石场后塔沟下游50m土壤、底泥4#废石场后塔沟下游100m土壤、底泥5#工业场地外东侧50m土壤6#工业场地外南侧50m土壤、底泥7#工业场地外西南侧50m土壤、底泥8#尾矿库最高标高上游100m土壤9#尾矿库截渗坝下游50m土壤、底泥10尾矿库截渗坝下游100m（杨木沟西南支沟与东南支沟交汇处）土壤、底泥表9.1-11 土壤监测因子监测方法表序号项目分析测定方法方法来源1镉原子吸收分光光度法GB/T 17141-19972汞原子荧光光谱法GB/T 17141-19973砷原子荧光法GB/T 17140-19974铅原子吸收分光光度法GB/T 17140-19975铬原子吸收分光光度法GB/T 17137-19976铁原子吸收分光光度法GB/T 17141-19977锰原子吸收分光光度法GB/T 17141-19978铜原子吸收分光光度法GB/T 17138-19979锌原子吸收分光光度法GB/T 17138-199710镍原子吸收分光光度法GB/T 17139-1997（2）样品的监测结果土壤样品监测结果见表9.1-12。表9.1-12 土壤样品监测结果统计表监测点位监测因子（mg/kg）pH值（无量纲）镉汞砷铅铬铁锰铜锌镍1#7.150.0290.0353.65426.5715.691369.58856.4526.9566.3932.562#7.680.0250.0453.62329.0218.021406.39924.6521.5599.5930.653#7.220.0310.0423.01932.1115.691235.41836.5122.2868.5925.624#7.050.0310.0373.51230.2616.981442.02936.2521.9865.3227.535#7.360.0220.0363.66527.6918.291586.96879.6224.6569.8736.986#7.030.0370.0423.34625.1118.591435.11954.6623.0966.9627.627#7.020.0280.0454.15830.2515.361234.56836.2226.1863.5230.178#7.580.0180.0333.98728.6919.251596.32991.2328.4566.2134.259#7.150.0260.0443.99630.2617.241529.68825.6726.3262.3131.0310#6.980.0280.0413.15228.5517.691253.12925.1723.564.2828.65土壤样品监测结果见表9.1-13。表9.1-13 底泥样品监测结果统计表监测点位监测因子（mg/kg）ph（无量纲）镉汞砷铅铬铁锰铜锌镍2#8.380.0370.0513.83529.2418.931497.16938.9523.6974.5932.693#7.420.0410.0493.26932.1319.121247.64873.3526.5876.8929.654#7.450.040.0573.90833.9718.71454.07993.1222.9870.1928.556#7.180.0420.0493.88126.1120.781473.14968.6525.6965.9829.617#7.190.0330.054.24633.3921.621270.09848.3629.6879.6932.159#7.440.0350.0474.00733.0418.831529.74827.6727.3688.6534.0510#7.20.0370.064.25434.2622.521563.41956.126.5576.5235.69（3）评价方法本次评价土壤环境质量现状评价采用单因子污染指数法。单因子污染指数为土壤中重金属的含量与土壤环境质量标准的比值，其表达式为：Pi=Ci/Si式中：Pi土壤环境质量指数；Ci土壤环境质量的实测值，mg/kg；Si土壤环境质量评价标准，mg/kg。Pi1表示受污染物i的影未超标；Pi1表示污染物i的污染超标，Pi越大，受污染程度越重。本次评价以土壤环境质量标准（GB15618-1995）中的类土壤为标准，即主要适用于一般农田、蔬菜地、茶园、果园、牧场等土壤。（4）评价结果评价标准采用土壤环境质量标准（GB15618-1995）中的二级标准。标准值见表9.1-14，单因子评价指数结果见表9.1-15及表9.1-16。表9.1-14 各监测因子评价标准 单位：mg/kg评价因子pH镉汞砷铅铬铜锌镍评价标准6.57.50.300.5030300200100250507.50.601.02535025010030060表9.1-15 评价区土壤样品单因子指数评价结果统计表监测因子编号及样品位置镉汞砷铅铬铜锌镍1#废石场最高标高上游50m0.0970.070.1220.0890.0780.2700.2660.6512#废石场后塔沟上游100m0.0420.450.1450.0830.0720.2150.3320.6133#废石场后塔沟下游50m0.1030.0840.1010.1070.0780.2230.2740.5124#废石场后塔沟下游100m0.1030.0740.1170.1010.0850.220.2610.5515#工业场地外东侧50m0.0730.0720.1220.0920.0910.2470.2790.7406#工业场地外南侧50m0.1230.0840.1120.0840.0930.2310.2680.5527#工业场地外西南侧50m0.0930.090.1390.1010.0770.2620.2540.6038#尾矿库最高标高上游100m0.030.330.1590.0960.0770.2850.2210.5719#尾矿库截渗坝下游50m0.0870.0880.1330.0820.0860.2630.2080.62110尾矿库截渗坝下游100m（杨木沟西南支沟与东南支沟交汇处）0.0930.0820.1050.0950.0880.2350.2570.573表9.1-16 评价区底泥样品单因子指数评价结果统计表 监测因子编号及样品位置镉汞砷铅铬铜锌镍2#废石场后塔沟上游100m0.0620.0510.1530.084 0.076 0.237 0.249 0.545 3#废石场后塔沟下游50m0.1370.0980.1090.107 0.096 0.266 0.308 0.593 4#废石场后塔沟下游100m0.1330.1140.1300.113 0.094 0.230 0.281 0.571 6#工业场地外南侧50m0.140.0980.1290.087 0.104 0.257 0.264 0.592 7#工业场地外西南侧50m0.110.10.1420.111 0.108 0.297 0.319 0.643 9#尾矿库截渗坝下游50m0.1170.0940.1340.110 0.094 0.274 0.355 0.681 10尾矿库截渗坝下游100m（杨木沟西南支沟与东南支沟交汇处）0.1230.120.1420.114 0.113 0.266 0.306 0.