阻燃剂四溴双酚A生产废水的资源化处理  

Resource Recycling-Based Treatment for Waste Water in Production of Fire Retardant Tetrabromobisphenol A

作　　者：邵维敏 邱炜[2] 杨昕达 周青云 李昊 王昶 SHAO Weimin;QIU Wei;YANG Xinda;ZHOU Qingyun;LI Hao;WANG Chang(College of Marine and Environmental Sciences,Tianjin University of Science&Technology,Tianjin 300457,China;Tianjin Changlu Hangu Salt Field Co.,Ltd.,Tianjin 300450,China)

机构地区：[1]天津科技大学海洋与环境学院,天津300457 [2]天津长芦汉沽盐场有限责任公司,天津300450

出　　处：《天津科技大学学报》2022年第4期37-43,共7页Journal of Tianjin University of Science & Technology

基　　金：产学研项目。

摘　　要：以阻燃剂四溴双酚A生产废水为研究对象,在使用气相色谱–质谱联用仪分析废水组成的基础上,结合实际生产工艺,构建酸化、沉降分离预处理、光催化降解深度处理的资源化处理模式,实现了对四溴双酚A生产废水中有机物的回收,以及深度转化为单一化学品三溴甲烷的资源化有效处理.采用正己烷对实验水样进行萃取,使用气相色谱–质谱联用仪对原水、酸化沉降后不同处理条件下的上清液水样进行定性和定量分析,考察光催化降解过程中H_(2)O_(2)投加量、紫外光光照时间以及曝气等因素对光催化降解反应的影响.实验结果表明:经过酸化后,生产废水中的2,4–二溴苯酚、2,6–二溴苯酚和2,4,6–三溴苯酚的去除率分别为64.76%、54.26%和90.52%,沉降分离可获得5.2 g/L的有价值的有机沉淀物;光催化降解可深度处理水中的残余有机物,使其定向转化为有机化学品三溴甲烷,在曝气、加入质量分数30%的H_(2)O_(2)溶液5 mL和紫外光照射2 h的最佳操作条件下,残余的2,4–二溴苯酚、2,6–二溴苯酚和2,4,6–三溴苯酚被完全降解,每升废水可获得5.59 g三溴甲烷,其中曝气有助于光催化降解反应的进行.该研究为阻燃剂生产废水的资源化有效处理提供了一条新的途径.Taking the wastewater from the production of fire retardant tetrabromobisphenol A as the target pollutant,the composition distribution in the wastewater was investigated by gas chromatography-mass spectrometry.Combined with the actual productive process,a resource recycling-based treatment mode of acidification,sedimentation and in-depth photocatalytic degradation was established.The valuable organic matter in the wastewater could be recycled by conversing into a single tribromomethane.The experimental water was extracted by n-hexane.Gas chromatography-mass spectrometry detector was used to detect the water samples for qualitative and quantitative analysis,such as the raw water,supernatant water samples under different treatment conditions after acidification sedimentation,investigating the effects of H_(2)O_(2) dosage,UV light time and aeration on the photo-catalytic reaction.The experimental results showed that after acidification,the removal efficiencies of 2,4-dibromophenol,2,6-dibromophenol and 2,4,6-tribromophenol in the wastewater reached 64.76%,54.26%and 90.52%respectively.5.2 g/L valuable organic sediment could be obtained by sedimentation;photo-catalytic technology was used to further degrade the residual organics in the wastewater and directionally converse them into the single tribromomethane.Under the optimal conditions of aeration,H_(2)O_(2) solution(30%)of 5 mL and UV irradiation of 2 h,the residual 2,4-dibromophenol,2,6-dibromophenol and 2,4,6-tribromophenol were completely degraded,and 5.59 g/L of tribromomethane could be recycled.It was demonstrated that aeration is conducive to the photo-catalytic reaction.Our study provided a new pathway for the resource-recycling and effective treatment of fire retardant productive wastewater.

关 键 词：阻燃剂 四溴双酚A 酸化分离 过氧化氢 光催化 

分 类 号：TQ243.1[化学工程—有机化工]