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辽宁省粮菜主产区农村饮用水硝酸盐污染状况研究

Keywords: 粮菜主产区,饮用水,硝酸盐污染

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Abstract:

为了解农村饮用水硝酸盐污染情况,2005—2008年连续4年7次采集辽宁省粮食、蔬菜主产区农户井水样品1307个,利用TU-1810DASPC紫外可见光光度计测定了硝酸盐含量。结果表明,粮食、蔬菜主产区农村饮用水硝酸盐含量平均值为18.96mg·L-1,大于20mg·L-1的样品占32.08%。保护地蔬菜产区农户饮用水硝酸盐含量平均值为21.26mg·L-1,个别的蔬菜种植户地下水硝酸盐含量达到396.67mg·L-1。水稻产区农村饮用水硝酸盐含量平均值为20.62mg·L-1,玉米产区农户饮用水硝酸盐含量为17.8mg·L-1。受硝酸盐污染的水井占监测水井总数的百分比分别为:昌图县34.52%、开原市49.63%、铁岭县38.92%、新民市52.68%、辽中县39.82%、黑山县32.42%和北镇市32.99%。

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