典型文献
Effects of ultrasonication on the DBP formation and toxicity during chlorination of saline wastewater effluents
文献摘要：
Chlorine disinfection of saline wastewater effluents rich in bromide and iodide forms rel-atively toxic brominated and iodinated disinfection byproducts(DBPs).Ultrasonication is a relatively new water treatment technology,and it is less sensitive to suspended solids in wastewaters.In this study,we examined the effects of ultrasonication(in terms of reactor type and combination mode with chlorination)on the DBP formation and toxicity in chlori-nated primary and secondary saline wastewater effluents.Compared with the chlorinated wastewater effluent samples without ultrasonication,ultrasonic horn pretreatment of the wastewater effluent samples reduced the total organic halogen(TOX)levels in chlorination by～30％,but ultrasonic bath pretreatment of the wastewater samples did not significantly change the TOX levels in chlorination,which might be attributed to the higher energy uti-lization and decomposition extent of organic DBP precursors in the ultrasonic horn reac-tor.Moreover,the TOX levels in the chlorinated samples with ultrasonic horn pretreatment(USH-chlorination),simultaneous treatment(chlorination+USH)and subsequent treatment(chlorination-USH)were also significantly reduced,with the maximum TOX reductions oc-curring in the samples with ultrasonic horn pretreatment.A toxicity index was calculated by weighting and summing the levels of total organic chlorine,total organic bromine and total organic iodine in each treated sample.The calculated toxicity index values of the chlo-rinated wastewater effluent samples followed a descending rank order of"chlorination"＞"chlorination+USH"＞"chlorination-USH"＞"USH-chlorination",with the lowest toxicity occurring in the samples with ultrasonic horn pretreatment.Then,a developmental toxic-ity bioassay was conducted for each treated sample.The measured toxicity index values of the chlorinated wastewater samples followed the same descending rank order.
文献关键词：
中图分类号：
作者姓名：
Yu Li;Wanxin Li;Xiangru Zhang;Jingyi Jiang
作者机构：
School of Environment,Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety&MOE Key Laboratory of Theoretical Chemistry of Environment,South China Normal University,Guangzhou 510006,China;Department of Civil and Environmental Engineering,Hong Kong University of Science and Technology,Hong Kong,China
文献出处：
引用格式：
[1]Yu Li;Wanxin Li;Xiangru Zhang;Jingyi Jiang-.Effects of ultrasonication on the DBP formation and toxicity during chlorination of saline wastewater effluents)[J].环境科学学报（英文版）,2022(07):326-335
A类：
iodinated,Ultrasonication,chlori,USH,chlorination+USH,rinated
B类：
Effects,ultrasonication,formation,toxicity,during,saline,effluents,Chlorine,disinfection,rich,bromide,iodide,forms,brominated,byproducts,DBPs,relatively,new,technology,less,sensitive,suspended,solids,wastewaters,In,this,study,examined,effects,terms,reactor,type,combination,mode,primary,secondary,Compared,chlorinated,samples,without,horn,pretreatment,reduced,total,organic,halogen,TOX,levels,bath,not,significantly,change,which,might,be,attributed,higher,energy,uti,lization,decomposition,extent,precursors,Moreover,simultaneous,subsequent,were,also,maximum,reductions,calculated,weighting,summing,chlorine,bromine,iodine,each,treated,values,followed,descending,rank,order,lowest,occurring,Then,developmental,bioassay,conducted,measured,same
AB值：
0.351122
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