环境影响评价报告全本公示简介:06 水环境影响分析.doc
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1、第六章 水、声、渣环境质量现状和影响分析第六章 水、声、渣环境质量现状和影响分析6.1 地表水环境质量现状与影响分析6.1.1 水环境质量现状分析与评价兴元铁合金有限责任公司委托兰州市环境监测站于2013年11月810日对项目所在地的大通河水质进行了监测。地表水环境质量现状监测断面见图1-1。(1)具体的监测方案如下:监测断面的布设为了了解项目所在地的大通河段水质状况,在项目所在地大通河段上设三个监测断面。1-1断面位于项目厂址上游700m的兰州市七十一中附近;2-2断面位于厂址下游约300m的下窑村附近;3-3监测断面位于厂址下游约1.65km处的水泥厂附近。各断面上的监测垂线设置在每条断面
2、上设3个取样垂线(分别为河中心、河两侧各距岸边约5m处)。每条取样垂线上设两个取样点(分别水面下0.5m、河底上0.5m);即每条断面上共取6个水样。水样的对待将每条断面上所取的水样混合。监测因子:pH、溶解氧、高锰酸盐指数、CODcr、BOD5、氨氮、总磷、总氮、石油类、挥发酚、氰化物、六价铬、总铬、砷、汞、总锌、粪大肠菌群、水温。监测频次:2次/d,连续3d。(2)监测分析方法本项目各类因子的监测分析方法见表6-1。表6-1 各类因子监测分析方法序号监测项目分析方法序号监测项目分析方法1水温温度计法GB13195-9110石油类红外分光光度法HJ637-20122pH玻璃电极法GB6920
3、-8611挥发酚4-氨基安替比林分光光度法HJ/T 503-20093溶解氧碘量法GB7489-8712氰化物容量法和分光光度法HJ484-20094高锰酸盐指数酸性法GB11892-8913六价铬二苯碳酰二肼分光光度法GB7467-875CODcr重铬酸盐法GB11914-8914镉火焰原子吸收法GB7475-876BOD5稀释与接种法HJ/T 505-200915砷原子荧光法-7氨氮纳氏试剂分光光度法HJ535-200916汞原子荧光法-8总磷钼锑抗分光光度法GB11893-8917锌火焰原子吸收法GB7475-879总氮碱性过硫酸钾消解紫外分光光度法HJ636-201218粪大肠菌群多管
4、发酵法-(3)评价方法一般水质因子采用单因子评价方法式中:Ci实测值; Si标准值; Pi污染分指数。特殊水质因子A、pH值采用以下方法计算:pHj7.0时,pH值的污染分指数为:SpH,j=(7.0-pHj)/(7.0-pHsd)pHj7.0时,pH值的污染分指数为:SpH,j=(pHj-7.0)/(pHsu-7.0)式中:SpH,jpH的标准指数; pHjpH值的实测统计代表值; pHsd表示标准下限值; pHsu表示标准上限值。B、溶解氧(DO)采用以下方法计算:式中:Pi溶解氧的指标指数; DOj溶解氧实测浓度,mg/l; DOf饱和溶解氧浓度,mg/l; DOs溶解氧评价标准,mg/
5、l。对饱和溶解氧,用经验公式计算(4)监测结果统计及评价地表水环境质量现状监测及评价结果见表6-2。115表6-2 地表水环境质量现状监测及评价结果(单位:mg/L,pH值为无量纲,大肠菌群单位为万个/L)监测断面监测因子监测结果评价结果11月8日上午11月8日下午11月9日上午11月9日下午11月10日上午11月10日下午最小值最大值平均值标准值最小指数最大指数样品数超标率1#断面水温101110111011101110.5/6/pH8.418.438.48.388.418.48.388.438.41690.69 0.72 60溶解氧6.977.17.37.17.26.97.37.160.8
6、3 0.74 60高锰酸盐指数1.41.11.31.111.811.81.340.25 0.45 60CODcr7.57.626.739.4712.111.46.7312.19.14150.45 0.81 60BOD50.80.70.70.70.60.60.60.80.730.20 0.27 60氨氮0.2250.2350.2270.2270.2190.240.2190.240.2290.50.44 0.48 60总磷0.0210.0190.0140.0170.0190.0220.0140.0220.0190.10.14 0.22 60总氮1.211.461.261.121.281.291.1
7、21.461.270.52.24 2.92 6100石油类0.0140.0130.0180.0130.0110.010ND0.0110.0180.0140.050.22 0.36 60挥发酚0.003ND0.003ND0.003ND0.003ND0.003ND0.003ND0.003ND0.003ND0.003ND0.0020.000.0060氰化物0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.050.000.0060六价铬0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.
8、004ND0.004ND0.004ND0.050.000.0060镉0.010ND0.010ND0.010ND0.010ND0.010ND0.010ND0.010ND0.010ND0.010ND0.0050.000.0060砷0.0020.00170.00160.00160.00180.00170.00160.0020.00170.050.03 0.04 60汞0.00001ND0.00001ND0.00001ND0.00001ND0.00001ND0.00001ND0.00001ND0.00001ND0.00001ND0.000050.000.0060锌0.020ND0.020ND0.020
9、ND0.020ND0.020ND0.020ND0.020ND0.020ND0.020ND1.00.000.0060粪大肠菌群23.823.823.823.823.823.823.823.823.80.2602#断面水温101110111011101110.5/6/pH8.398.398.398.48.48.48.398.48.406-90.700.7060溶解氧7.27.27.17.37.27.27.17.37.250.660.6260高锰酸盐指数1.51.32.21.82.92.11.32.92.060.220.4860CODcr17.511.712.713.41616.411.717.51
10、4.6200.590.8860BOD510.80.70.70.90.70.710.840.180.2560氨氮0.2610.2250.2740.2580.2220.2270.2220.2740.24510.220.2760总磷0.0270.0280.030.030.0310.0290.0270.0310.0290.20.140.1660总氮1.251.231.871.331.281.291.231.871.3811.231.876100石油类0.0140.0120.010ND0.010.0140.0110.010.0140.0120.050.200.2860挥发酚0.003ND0.003ND0
11、.003ND0.003ND0.003ND0.003ND0.003ND0.003ND0.003ND0.0050.000.0060氰化物0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.20.000.0060六价铬0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.050.000.0060镉0.010ND0.010ND0.010ND0.010ND0.010ND0.010ND0.010ND0.010ND0.010ND0.0050.000.006
12、0砷0.00180.00180.00140.00130.00160.00160.00130.00180.00160.050.030.0460汞0.00001ND0.00001ND0.00001ND0.00001ND0.00001ND0.00001ND0.00001ND0.00001ND0.00001ND0.00010.000.0060锌0.020ND0.020ND0.020ND0.020ND0.020ND0.020ND0.020ND0.020ND0.020ND10.000.0060粪大肠菌群23.823.823.823.823.823.823.823.823.810.00240.0024603
13、#断面水温111111111111111111/6/pH8.398.388.418.428.48.398.388.428.406-90.690.7160溶解氧7.37.37.27.37.37.27.27.37.2750.640.6260高锰酸盐指数2.31.62.31.61.621.71.62.31.8460.270.3860CODcr14.914.815.915.815.616.714.816.715.6200.740.8460BOD510.710.50.50.60.510.740.130.2560氨氮0.2770.3110.2530.2720.2740.2610.2530.3110.275
14、10.250.3160总磷0.0310.030.0220.0250.0280.0260.0220.0310.0270.20.110.1660总氮1.572.091.61.961.741.661.572.091.7711.572.096100石油类0.0170.0190.010.0110.0120.0170.010.0190.0140.050.200.3860挥发酚0.003ND0.003ND0.003ND0.003ND0.003ND0.003ND0.003ND0.003ND0.003ND0.0050.000.0060氰化物0.004ND0.004ND0.004ND0.004ND0.004ND0
15、.004ND0.004ND0.004ND0.004ND0.20.000.0060六价铬0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.004ND0.050.000.0060镉0.010ND0.010ND0.010ND0.010ND0.010ND0.010ND0.010ND0.010ND0.010ND0.0050.000.0060砷0.00150.00150.00140.00160.00140.00150.00140.00160.00150.050.030.0360汞0.00001ND0.00001ND0.00001ND0.00
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