Effects of nitrate and glucose on the formation of chloronitromethane (CNM) under UV/chlorine treatment

IF 2.3 Q2 Environmental Science

Journal of Water Reuse and Desalination Pub Date : 2021-05-20 DOI:10.2166/WRD.2021.010

D. Lin, Xu Bohui, Zhu Fanfang, S. Prasad

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引用次数: 9

Abstract

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.

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硝酸盐和葡萄糖对紫外线/氯处理下氯硝基甲烷（CNM）生成的影响

水中硝酸盐和溶解有机物（DOM）的存在可与氯消毒剂反应生成毒性较高的氯硝基甲烷（CNM）。本研究的目的是研究当葡萄糖作为碳源时，NH4NO3、NaNO3和Ca（NO3）2在UV/氯处理下对CNM形成的影响。结果表明，硝酸盐和葡萄糖对CNM的生成先增加后减少。在三种类型的硝酸盐中，由NH4NO3形成CNM的潜力最大。CNM的浓度随着葡萄糖浓度和紫外线强度的增加而增加，而随着pH从6增加到8而降低。对各种氮的分析表明，在紫外线/氯处理下，NH3-N和转化为溶解有机氮（DON）。在紫外/氯处理条件下，推测了硝酸盐和葡萄糖形成CNM的途径。实际的水样被用来验证在实验室中发现的规律。该研究可为开发一种新的水处理消毒方法提供依据，并有助于控制紫外线/氯处理下CNM的产生。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Water Reuse and Desalination ENGINEERING, ENVIRONMENTAL-WATER RESOURCES

CiteScore

4.30

自引率

0.00%

发文量

审稿时长

16 weeks

期刊介绍： Journal of Water Reuse and Desalination publishes refereed review articles, theoretical and experimental research papers, new findings and issues of unplanned and planned reuse. The journal welcomes contributions from developing and developed countries.