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目的筛查地处淮河流域的河南省沈丘县高砷水源,为砷中毒防治提供依据。方法以淮河支流沙河为轴心,沿河80个自然村居民饮用水为筛查对象,采用原子荧光分光光度法测定水砷含量。结果检测20个分散供水(井深<50米)村500份水样、60个深水井集中供水自然村19处水源水,分散供水水砷范围为:0.001~0.054 mg/L,共检出水砷在0.01~0.05 mg/L水样30个,占6.00%,未检出水砷>0.05 mg/L水样,20个村水砷含量均≤0.01mg/L;19处集中供水水样砷含量范围为:0.001~0.006 mg/L。结论河南省沈丘县无砷超标水源,以村为单位,无分散供水砷污染(以水砷>0.01 mg/L计),沈丘县无砷中毒防治任务。
Objective To screen high-arsenic water sources in Shenqiu County, Henan Province, located in the Huaihe River Basin, and provide a basis for the prevention and control of arsenic poisoning. Methods Shahe River, a tributary of the Huaihe River, was used as an example. Drinking water from 80 natural villages along the river was used as the screening target, and the arsenic content was determined by atomic fluorescence spectrometry. Results A total of 500 water samples from 20 villages with decentralized water supply (well depth <50 m) and 19 water sources from 60 deep-water wells were collected. The arsenic range of water supply was 0.001-0.05 4 mg / L. 30 water samples with 0.01 ~ 0.05 mg / L, accounting for 6.00%, no water arsenic> 0.05 mg / L water samples, 20 arsenic water samples ≤0.01 mg / L; the concentration of arsenic in 19 centralized water samples : 0.001 ~ 0.006 mg / L. Conclusion Shenqiu County, Henan Province, has no arsenic-exceeding water source. The village is a unit of arsenic-contaminated water without arsenic (water arsenic> 0.01 mg / L). Shenqiu County has no arsenic poisoning prevention and control task.