Abstract:The surface character of a 11-year-old DN300 ductile cast iron pipes of main pipelines in drinking water distribution system was investigated by atomic absorption spectrometry, GC-MS, EDS, and XRD, and the content of pollutants, such as metals and organic compounds, also detected. Results showed that, the pipe scales of the lower part had the maximum amount and the maximum average particle size. The spatial distribution of heavy metals was significantly different. The concentration of iron, manganese, zinc, lead, copper and chromium was highest in the upper pipe scales. While the highest content of aluminum was detected in the lower pipe scales. The distribution was closely related with its resource in pipe scales. Beside some common types of hydrocarbons formed by microbial metabolites, there were also some microalgae metabolites and exogenous contaminant accumulated in pipe scales. And types of organic pollutants varied in different spatial locations. The finding put forward higher requirements on the research method about drinking water distribution system biochemical safety, and provided a theoretical basis for the drinking water safety.
陈环宇, 柳景青, 魏宗元, 张慧慧, 何晓芳, 周晓燕, 裘尚德, 胡宝兰, 楼莉萍. 供水管网大口径管道管垢中污染物分布的径向差异[J]. 中国环境科学, 2015, 35(9): 2706-2712.
CHEN Huan-Yu, LIU Jing-Qing, WEI Zong-Yuan, ZHANG Hui-Hui, HE Xiao-Fang, ZHOU Xiao-Yan, QIU Shang-De, HU Bao-Lan, LOU Li-Ping. Radial differences in contaminant distribution in large-diameter pipe scales of main pipelines in drinking water distribution system. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(9): 2706-2712.