| 紫外线消毒对水中余氯衰减规律的影响研究 |
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| 引用本文： | 张永吉,胡领文,叶河秀,周玲玲. 紫外线消毒对水中余氯衰减规律的影响研究[J]. 给水排水, 2011, 37(8) |
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| 作者姓名： | 张永吉 胡领文 叶河秀 周玲玲 |
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| 作者单位： | 1. 同济大学长江水环境教育部重点实验室,上海,200092
2. 同济大学污染控制与资源化研究国家重点实验室,上海,200092 |
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| 基金项目： | 国家自然科学基金项目(50878164); 国家水体污染控制与治理科技重大专项(2008ZX07422-005); 长江水环境教育部重点实验室自主课题(YRWEY1001) |
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| 摘 要： | 对经紫外线消毒后水中余氯的衰减规律进行了研究,考察了pH、有机物含量、紫外线强度及剂量等因素对氯衰减速率的影响。结果表明:紫外线剂量低于40mJ/cm2时紫外线消毒对氯衰减基本没有影响,而当紫外线剂量大于40mJ/cm2时会加速氯的衰减速度,紫外线剂量从40mJ/cm2提高到1 000mJ/cm2时,水中余氯由3.2mg/L下降到2.8mg/L;低紫外线强度下氯的衰减速度低于高紫外线强度情况,如紫外线剂量为100mJ/cm2,紫外线强度为0.113 00mW/cm2和0.028 25mW/cm2时,水中余氯分别为2.31mg/L和2.63mg/L;在同一紫外线剂量下,pH偏酸性时氯衰减速度高于高pH情况;增加水中有机物浓度会加快氯的衰减速度。在实际应用低紫外线强度进行消毒时,如降低投氯量将不能有效保证管网水中的余氯量。
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| 关 键 词： | 紫外线 照射 消毒 氯 衰减 |
Effect of UV disinfection on residual chlorine decay in drinking water |
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| Zhang Yongji,Hu Lingwen,Ye Hexiu,Zhou Lingling. Effect of UV disinfection on residual chlorine decay in drinking water[J]. Water & Wastewater Engineering, 2011, 37(8) |
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| Authors: | Zhang Yongji Hu Lingwen Ye Hexiu Zhou Lingling |
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| Affiliation: | Zhang Yongji1,Hu Lingwen1,Ye Hexiu1,Zhou Lingling2 (1.Key Laboratory of Yangtze River Water Environment,Ministry of Education,Tongji University,Shanghai 200092,China,2.State Key Laboratory of PollutionControl and Resources Reuse,China) |
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| Abstract: | A test was conducted to investigate the decay of residual chlorine after UV disinfection and the influence of pH,concentration of organic matter and UV intensity and dosage on chlorine decay.The results showed:when the UV dosage was below 40 mJ/cm2,there was little influence on chlorine decay from UV disinfection;when the UV dosage was above 40 mJ/cm2,the chlorine decay rate would be accelerated;when the UV dosage increased from 40 mJ/cm2 to 1 000 mJ/cm2,the residual chlorine in drinking water would decreas... |
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| Keywords: | UV Irradiation Disinfection Chlorine Decay |
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