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近年来,有人发现活性炭净水器出水中亚硝酸盐含量高于进水含量,由于亚硝胺是致癌性物质,担心饮用净水器滤后水可能会合成一定量的亚硝胺而导致癌变。活性炭净水器出水中亚硝酸盐为什么会增加?净水器通水使用一定时间后,由于吸附截留水中有机杂质和杂菌,活性炭炭粒表面逐渐形成生物膜,成为细菌的培养基。水中蛋白性杂质在微生物作用下分解成肽、氨基酸等,最后形成氨,是为有机性氮素化合物逐渐分解成较简单的无机性氮素化合物的氨化过程:
In recent years, it has been found that the nitrite content in activated carbon water purifiers is higher than the influent content. Because nitrosamines are carcinogenic substances, it is feared that the filtered water from drinking water purifiers may synthesize a certain amount of nitrosamines and cause canceration. . Why does the nitrite in the effluent of the activated carbon water purifier increase? After a certain period of time after the water purifier is used for water passage, due to the adsorption of organic impurities and mixed bacteria in the entrapped water, the surface of activated carbon particles gradually forms a biofilm and becomes a medium for bacteria. Protein impurities in water are decomposed into peptides, amino acids, etc. under the action of microorganisms. Finally, ammonia is formed, which is the amination process for the gradual decomposition of organic nitrogen compounds into simpler inorganic nitrogen compounds: