【摘要】 目的 探讨呼和浩特慢性地方性砷中毒地下水水质特征。方法 分别于1998年11月和1999年4月采集呼和浩特慢性地方性砷中毒地区地下水样 74份进行水质分析,并对富砷（As≥50μg/L）和非富砷（As<50μg/L）水各指标中位数进行分析比较。结果 富砷地下水Na+（163.0 mg/L）、HCO3-（605.0mg/L）、溶解性有机碳（DOC,8.67 mg/L）、总Fe（0.61mg/L）、Mn2+（0.058mg/L）、总P（0.82mg/L）、B3+（0.44 mg/L）、Al3+（11 mg/L）和Ph2+（0.1 mg/L）含量均高于非富砷水（P<001）,溶解氧（DO,00 mg/L）、电位（Eh,39 mV）和Se4+（<0.5 mg/L）含量低于非富砷水（P<0.01）。结论 改水降氟应考虑砷与其他元素的协同或拮抗作用。更多还原

【Abstract】 ve To explore the characteristics of water quality of underground water in chronic endemic arsenic poisoning areas of Hohhot. Methods 74 underground water samples were collected from chronic endemic ar-senic poisoning areas of Hohhot in Nov. 1998 and Apr. 1999 respectively for water quality analysis. The analysis and comparision of every indexes of water quality of high-arsenic water samples (As≥50μg/L) and low-arsenic water samples (As<50μg/L) were carried out using medians. Results Higher levels of Na+ (163.0μg/L), HCO3- (605. 0 mg/L) ,dissolved organic carbon (8. 67 mg/L) , total iron (0. 61 mg/L) , Mn2+ (0. 058 mg/L) , total phosphorous (0. 82 mg/L), B3+ (0. 44 mg/L), Al3 + (11 mg/L) and Pb2 + (0. 1 mg/L) and lower levels of dissolved oxygen (0.0 mg/L) , Eh (electrade potential, 39 mV) and Se4+(<0.5 mg/L) were found in high-arsenic underground water samples com-pared with those of low-arsenic underground water samples (P<0.01) . Conclusion Synergism or antagonism be-tween arsenic and other coexisting elements in underground water should be considered carefully in improvement of water supply and minimization of the levels of arsenic in drinking water.更多还原