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首页> 外文期刊>Journal of Environmental Engineering >Bromate formation by ozone-VUV in comparison with ozone and ozone-UV: Effects of pH, ozone dose, and VUV power
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Bromate formation by ozone-VUV in comparison with ozone and ozone-UV: Effects of pH, ozone dose, and VUV power

机译：与臭氧和臭氧-UV相比，臭氧-VUV形成的溴酸盐：pH，臭氧剂量和VUV功率的影响

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摘要

The formation of bromate by ozone-vacuum ultraviolet (VUV) (185+254 nm) process in comparison with ozone and ozone-ultraviolet (UV) (254nm) processes of coagulated and softened water was studied. The effects of pH (7, 9, and 11), ozone dosage (1, 2, and 4mg O_3/mg C), and VUV power (30, 60, and 120W) were investigated. Bromate concentrations formed by the ozone-VUV process were up to four and six times less than those by the ozone and ozone-UV processes, respectively. Among the variables studied, ozone dosage had the most effect on bromate formation by the ozone-VUV process. Approximately 64 and 213% increases of bromate concentration were observed when the ozone dosage was increased from 1 to 2 and 4mg O3/mg C with VUV power of 120W at pH 7. The bromate formation also increased as VUV power and pH increased. Hydroxyl radical exposure had a positive relationship with ozone dosage and bromate formation. Results further indicated that it might be difficult to achieve the drinking water standard for bromate and high organic matter removal concurrently.
机译：与臭氧和臭氧-紫外线（254nm）凝结和软化水的过程相比，研究了通过臭氧-真空紫外线（VUV）（185 + 254 nm）过程形成的溴酸盐。研究了pH（7、9和11），臭氧剂量（1、2和4mg O_3 / mg C）和VUV功率（30、60和120W）的影响。臭氧-VUV工艺形成的溴酸盐浓度分别比臭氧和臭氧-UV工艺形成的溴酸盐浓度分别低四倍和六倍。在研究的变量中，臭氧剂量对通过臭氧-VUV工艺形成溴酸盐的影响最大。当臭氧剂量从1增至2和4mg O3 / mg C（pH为120W的VUV功率）时，溴酸盐的浓度增加了约64％和213％。随着VUV功率和pH的增加，溴酸盐的形成也增加了。羟自由基暴露与臭氧剂量和溴酸盐形成呈正相关。结果进一步表明，要同时达到溴酸盐和高有机物去除率可能很难达到饮用水标准。

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