Journal of Water Reuse and Desalination ( IF 2.3 ) Pub Date : 2021-09-01 , DOI: 10.2166/wrd.2021.010 Deng Lin 1 , Xu Bohui 1 , Zhu Fanfang 1 , Singh Rajendra Prasad 1
The existence of nitrate and dissolved organic matter (DOM) in water can react with chlorine disinfectant to form chloronitromethane (CNM) with high toxicity. The purpose of this study was to investigate the effects of NH4NO3, NaNO3 and Ca(NO3)2 on the formation of CNM under UV/chlorine treatment when glucose was used as the carbon source. The results showed that the formation of CNM from nitrate and glucose was raised first and then decreased. Among three types of nitrate, the potential of forming CNM from NH4NO3 was the largest. The concentration of CNM increased with increasing glucose concentration and UV intensity, while it decreased with increasing pH from 6 to 8. The analysis of various nitrogen showed that NH3-N and were converted into dissolved organic nitrogen (DON) under UV/chlorine treatment. The formation pathways of CNM from nitrate and glucose had been inferred under UV/chlorine treatment. Actual water samples were used to verify the laws found in the laboratory. The study could provide the development of a new disinfection method for water treatment and be useful for controlling the generation of CNM under UV/chlorine treatment.
中文翻译:
UV/氯处理下硝酸盐和葡萄糖对氯硝基甲烷(CNM)形成的影响
水中存在硝酸盐和溶解性有机物(DOM),可与氯消毒剂反应生成高毒性的氯硝基甲烷(CNM)。本研究的目的是研究当葡萄糖作为碳源时,NH 4 NO 3、NaNO 3和Ca(NO 3 ) 2对紫外线/氯处理下CNM形成的影响。结果表明,硝酸盐和葡萄糖形成的CNM先升高后降低。在三种硝酸盐中,NH 4 NO 3形成CNM的潜力是最大的。CNM 的浓度随着葡萄糖浓度和 UV 强度的增加而增加,而随着 pH 从 6 到 8 的增加而降低。 各种氮的分析表明,NH 3 -N 和在 UV/氯处理下转化为溶解有机氮 (DON) . 在紫外线/氯处理下推测了硝酸盐和葡萄糖的 CNM 形成途径。实际水样用于验证实验室中发现的法律。该研究可以为水处理提供一种新的消毒方法的开发,并有助于控制紫外线/氯处理下 CNM 的产生。