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二甲基亚硝胺是一种致癌、致突变和致畸的物质。Kobayashi 1974年报告了在污水中存在仲胺类物质,且认为在光合细菌和其他微生物的联合作用下能消除这类物质。为了解亚硝胺在污染环境中的形成和光合细菌对它的解毒作用,作者对二甲基亚硝胺设计了下述实验。一、在污染环境中二甲基亚硝胺的形成:作者配制含有污泥并加入亚硝酸钠的人工污水,当该污水的 pH 为酸性时,经14天即检出二甲基亚硝胺,第20天达最高值。尤其当污水的 pH 为4时,第20天的二甲基亚硝胺浓度为11ppm。二甲基亚硝胺也能在腐败一周后的污泥中检出,最大值在第二周为2.85μg/ml。
Dimethylnitrosamine is a carcinogenic, mutagenic and teratogenic substance. Kobayashi reported the presence of secondary amines in wastewater in 1974 and considered them to be combated under the combined action of photosynthetic bacteria and other microorganisms. In order to understand the formation of nitrosamines in polluted environment and the detoxification of photosynthetic bacteria, the author designed the following experiments on dimethylnitrosamine. I. Formation of Dimethylnitrosamine in a Polluted Environment: The authors prepared artificial sewage containing sludge and adding sodium nitrite. When the pH of the wastewater was acidic, dimethyl nitrosamine was detected after 14 days , The highest value on the 20th day. Especially when the pH of the sewage was 4, the dimethylnitrosamine concentration on the 20th day was 11 ppm. Dimethylnitrosamine can also be detected in the sludge one week after decay, with a maximum of 2.85 μg / ml in the second week.