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借鉴美国环境保护局规定中的有机氯农药分析方法,利用Agilent 6890N气相色谱仪/微电子捕获检测器(μ-ECD)以及固相萃取预处理技术,对饮用水中的DDT和BHC的成分进行分析测定.该测定方法快速、简洁、重复性好,线性相关系数>99.9%,并且样品回收率不低于88%,用于测定实际样品结果满意. 相似文献
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建立生活饮用水中二氧化氯消毒副产物氯酸盐、亚氯酸盐及氟化物、氯化物、硝酸盐、硫酸盐等6种无机阴离子的同时测定方法。以离子色谱法为测试手段,对采用二氧化氯消毒的生活饮用水出厂水及管网水中氯酸盐、亚氯酸盐含量进行测定。结果:分析方法的线性相关系数在0.9990-0.9994之间,,测试值的相对标准偏差RSD为1.49%-4.12%,各组份的检出限在0.0050-0.0225mg/L之间,回收率为96.0%-102.0%。方法简单、快速、准确、灵敏,适于大批量水样分析。出厂水及末梢水中二氧化氯消毒产生的消毒副产物均符合国标。 相似文献
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江苏省某市典型饮用水水源中抗生素质量浓度特征 总被引:6,自引:0,他引:6
采用固相萃取-高效液相色谱/串联质谱法,分析江苏省某市3个典型地表饮用水水源中5类(14种)抗生素质量浓度特征。结果表明,14种目标抗生素的质量浓度在ND~52.7 ng/L,检出率在0~78%。检出频率较高的为磺胺嘧啶、磺胺甲噁唑、金霉素和氧氟沙星,质量浓度相对较高的为磺胺类,但总体上,地表水饮用水水源中抗生素的质量浓度水平低于国内外其他地表水中相应污染物的质量浓度水平;抗生素质量浓度受季节和水源类型影响,平水期(188.3 ng/L)枯水期(57.2ng/L)丰水期(8.9 ng/L),太湖水源地略高于长江水源地。 相似文献
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浙江省浦江县把解决农民饮用水问题列入新农村建设重要内容,在全省范围内率先编制了县域性的农村饮水安全总体规划,通过县财政安排、农民自筹、上级补助和社会捐助的方式解决工程和管理资金,取得了显著的成效. 相似文献
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地下生活贮水池的设置探讨 总被引:1,自引:0,他引:1
<建筑给水排水设计规范>(GBJ15-88,1997年版)第2.2.10条规定:生活或生活用水与其他用水合用的水池、水箱的池(箱)体应采用独立结构形式,不得利用建筑物的本体结构作为水池池壁和水箱箱壁.<建筑给水排水设计规范>(GB50015-2003)第3.2.10条规定:建筑物内的生活饮用水水池(箱)体,应采用独立结构形式,不得利用建筑物的本体结构作为水池(箱)的壁板、底板及顶盖.自1997年起,在设计中多数给排水工程师都已习惯于将建筑物内的生活贮水池做到与建筑物本体结构脱开. 相似文献
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The industrial pesticide dichlorodiphenyltrichloroethane (DDT) was initially heralded for its effectiveness against malaria and agricultural pests, but was eventually banned in North America during the 1970s due to growing concerns about its detrimental impacts on wildlife. Despite the successful termination of its commercial application, the persistent and bioaccumulative nature of DDT has resulted in lingering concentrations in aquatic food webs, particularly in upper trophic-level fish species. In this study, we used dynamic linear modeling to examine temporal trends of four DDT compounds (p,p′-DDT, o,p′-DDT, p,p′-DDE, and p,p′-DDD) in nine fish species in Lake Erie from 1976 to 2007, while considering both fish length and lipid content as covariates. Our results indicate that the levels of both p,p′-DDT and o,p′-DDT have been decreasing, often to the detection limit, with slowing decline rates during the second half of the study period. The p,p′-DDE levels were much more variable, exhibiting large fluctuations through time (though usually with a net downward trajectory), with the annual rates of change of the corresponding concentrations remaining negative or (more recently) near zero. Similarly, p,p′-DDD levels fluctuated (though to a lesser degree) over time, with gradually slowing decline rates in many fish species, such as smallmouth bass and freshwater drum. The results are in agreement with our understanding that DDE and DDD are degradation products of p,p′-DDT, and thus continue to be produced, as DDT is broken down. Declining trends observed for nearly all congeners and fish species indicate reduction of DDT risks in the Lake Erie fish communities. 相似文献
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以合浦县党江供水工程为例,介绍了在平原人口分散地区,通过采用变频与管道泵联合供水,满足乡镇及农村人口分散,用水时变系数大的要求,达到节约投资,降低运行费用的目的。 相似文献