TiO2光催化氧化脱盐电池系统去除海水中PAHs效果研究  

Study on the removal of PAHs from seawater by TiO2 photocatalytic oxidation desalination cells

作　　者：卢家磊 董奕岑 徐成龙 张饮江 LU Jia-lei;DONG Yi-cen;XU Cheng-long;ZHANG Yin-jiang(College of Marine Ecology and Environment,Shanghai Ocean University,Shanghai 201306,China;Water Environment & Ecology Engineering Research Center of Shanghai Institution ofHigher Education,Shanghai 201306,China)

机构地区：[1]上海海洋大学海洋生态与环境学院,上海201306 [2]水域环境生态上海高校工程研究中心,上海201306

出　　处：《应用化工》2021年第1期78-82,共5页Applied Chemical Industry

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07101014-004);上海临港海绵城市土壤盐碱地改良项目(D-8005-18-0228);大学生创新创业训练计划项目(S201910264062,X201910264081);上海海洋大学骆肇荛大学生科技创新基金项目(A1-2004-20-201307)。

摘　　要：针对海水PAHs污染严重、PAHs难降解等问题,构建了TiO2光催化氧化脱盐电池系统,通过检测电化学、盐度与PAHs降解量等指标,探究了TiO2光催化氧化脱盐电池系统的脱盐效率以及pH对系统效能的影响,并对海水中PAHs的降解效果进行了分析评价。结果表明,TiO2光催化氧化脱盐电池系统电压输出可达108 mV,系统运行3 h后,PAHs降解量达280.79 ng/L;当pH≥3.0时,系统内PAHs降解率最高可达98%,并在pH=7时,脱盐率达到最佳的90.3%;以pH=8的降解PAHs适宜环境为例,TiO2光催化剂投加量为3 g/L时,PAHs降解率高达95.8%,出水PAHs浓度为52.13 ng/L。In view of the serious pollution of PAHs in seawater and the difficulty of PAHs degradation,a TiO2 photocatalytic oxidative desalination battery system was constructed.The desalination efficiency of TiO2 photocatalytic oxidation desalination battery system and the effect of pH on the system efficiency were explored by detecting the indicators of electrochemistry,salinity and PAHs degradation,and the degradation effect of PAHs in seawater was analyzed and evaluated.The results show that the voltage output of TiO2 photocatalytic oxidation desalination battery system can reach 108 mV,and the degradation amount of PAHs reaches 280.79 ng/L after the system runs for 3 h.When pH≥3.0,the highest degradation rate of PAHs can reach 98%,and the best desalination rate is 90.3%at pH=7.Taking a suitable environment of pH=8 for example,when the dosage of TiO2 photocatalyst was 3 g/L,the degradation rate of anode PAHs was up to 95.8%,and the concentration of PAHs in the effluent was only 52.13 ng/L.

关 键 词：海水PAHs降解 TIO2光催化 脱盐电池系统 产电脱盐 pH梯度 催化剂用量 

分 类 号：TQ152[化学工程—电化学工业] TM911[电气工程—电力电子与电力传动]