AN INVESTIGATION AND ANALYSIS OF TOXIC ORGANIC TRACES IN DRINKING WATER SOURCES IN HENAN
DUO Ke-xin, WANG Ling-ling, ZHU Xu-chao, PENG Hua, SHEN Jian (Henan Province Environmental Monitoring Center, Zhengzhou 450004, China)
This paper aims to present the results of its investigation and analysis of the drinking water sources in Henan Province for the polluted nature and characteristic features of the organic toxicant traces. The results of our study by means of multi-analysis techniques indicate that there exist 23 kinds of toxicant pollutants in the water sources, including GC/MS, HPLC, GC/ECD. The sample collection period has been chosen three times in spring, summer and winter. Among the 740 kinds of organic compounds found in the research samples, 261 kinds belong to main toxic and detrimental pollutants according the toxicity documents. PAHs and phathlates are the commonest pollutants, whose pollution situations are very serious. Many of them have been characterized as carcinogens, mutagens and teratogens. The concentration levels of most toxic compounds are far lower than the new national drinking water source standards. While the concentration of VOCs is 0.01～2.0 μg/L and that of all SVOCs - less than 1.0 μg/L, 60.5% of the pollutants are less than 0.1 μg/L. But no less than 100 compounds have been detected in every point of the 20 surface drinking water spots. However, the underground water drinking sources are relatively slightly contaminated.