Factors affecting formation of haloacetonitriles and haloketones during chlorination/monochloramination of Jinlan Reservoir water
Factors affecting formation of haloacetonitriles and haloketones during chlorination/monochloramination of Jinlan Reservoir water
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DOI：
10.2166/ws.2013.097
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发表时间：
2013-08
期刊：
影响因子：
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通讯作者：
H. Hong;Fangqu Huang;Hongjun Lin;Haiying Yu;F. Wang;L. Ding
中科院分区：
文献类型：
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作者：
H. Hong;Fangqu Huang;Hongjun Lin;Haiying Yu;F. Wang;L. Ding
研究了金兰水库水在不同处理条件下氯化和氯胺化反应中卤代乙腈和卤代酮的生成规律。结果表明，一氯胺而不是氯产生显着较低浓度的HAN和HK。在氯化反应中，HAN和HK的生成量随着反应时间和氯剂量的增加而增加。添加溴化物显着提高了总HAN产率，但由于含溴HK的不可用，减少了总HK的形成。HAN的产量随温度的升高而增加，而HKS的产量随温度的升高先增加后减少。至于pH值的影响，HKs的产量普遍增加，随着pH值的降低，但没有观察到明显的模式HAN的形成。另一方面，在一氯胺化中，HAN和HK的产率通常随反应时间、温度和一氯胺剂量而增加。在低pH下形成较高的HAN和HKS产率，并且溴化物的添加显著增加了总HAN产率。极差分析进一步表明，避免溴化物污染、降低氯/氯胺投加量以及缩短反应时间是控制金兰水库饮用水HAN和HKS生成的有效途径。
Formations of haloacetonitriles (HANs) and haloketones (HKs) from chlorination and chloramination from Jinlan Reservoir water under different treatment conditions were investigated in this study. Results showed that monochloramine rather than chlorine produced significant lower concentrations of HANs and HKs. In chlorination, the formation of HANs and HKs increased with the reaction time and chlorine dose. Addition of bromide significantly enhanced the total HANs yields but reduced total HKs formation due to the unavailability of bromine-containing HKs. HANs yields increased as the temperature was raised, yet HKs yields increased first and decreased later with temperature. As for the influence of pH, the HKs yields generally increased as the pH decreased, yet no obvious pattern was observed for HANs formation. On the other hand, in monochloramination, the yields of HANs and HKs generally increased with reaction time, temperature and the monochloramine dose. Higher HANs and HKs yields formed at low pH, and the addition of bromide significantly increased the total HANs yields. Range analysis further revealed that avoiding the bromide contamination, lowering the chlorine/monochloramine dose as well as reducing the reaction time were the effective ways to control HANs and HKs formation for drinking water sourced from Jinlan Reservoir water.