H2O2氧化/CaO沉淀预处理化学镀镍废槽液及其FO浓缩减量效果研究  

Study on Pretreatment of Electroless Nickel Plating Waste Bath by H2O2 Oxidation/CaO Precipitation and the Effect of FO Concentration and Reduction

作　　者：蒋永伟 潘婷 丁博蕾 曹蕾 何佳颖 黄建 冯旭松 张勇 Jiang Yongwei;Pan Ting;Ding Bolei;Cao Lei;He Jiaying;Huang Jian;Feng Xusong;Zhang Yong(Jiangsu Provincial Environmental Engineering Technology Co.,Ltd.,Nanjing 210036,China;Engineering Research Center of Standardized Construction and Intelligent Management of Industrial Parks,Nanjing 210036,China;Jiangsu Province Engineering Research Center of Standardized Constructionand Intelligent Management of Industrial Parks,Nanjing 210036,China;School of Environment,Nanjing Normal University,Nanjing 210023,China;School of Business Administration,Nanjing University of Finance&Economics,Nanjing 210023,China;Jiangsu Provincial Environmental Protection Group Co.,Ltd.,Nanjing 210036,China)

机构地区：[1]江苏省环境工程技术有限公司,江苏南京210036 [2]江苏省工业园区规范化建设及智慧化管控工程研究中心,江苏南京210036 [3]江苏省重点行业减污降碳协同控制工程研究中心,江苏南京210036 [4]南京师范大学环境学院,江苏南京210023 [5]南京财经大学工商管理学院,江苏南京210023 [6]江苏省环保集团有限公司,江苏南京210036

出　　处：《南京师大学报（自然科学版）》2023年第4期131-137,共7页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：江苏省环保集团科技项目(JSEP-TZ-2021-1001-RE).

摘　　要：为了降低高浓度化学镀镍废槽液处理成本,采用氧化-沉淀预处理-正渗透(FO)组合工艺对废槽液进行常温浓缩减量.FO膜为水通道蛋白膜(AQP),汲取液为4 mol·L^(-1)NaCl溶液,FO过程采用活性层朝向原料液(AL-FS)的模式.当采用H2O2加CaO进行预处理时,废液电导率、TP、TOC和Ni的去除率远高于其他预处理方案.当CaO添加量为5%时,系统水通量可达到5.89 L·(m^(2)·h)^(-1);浓缩后污染物TP、Ni和TOC的截留率分别达到73.97%、92.90%和84.65%.三维荧光图谱(EEM)结果显示,有机物类腐殖酸组分比酪氨酸或色氨酸蛋白类物质更容易透过半透膜从原料液进入到汲取液中.适量的CaO预处理不仅可以有效的降低污染物的浓度和渗透压,有利于后续FO工艺浓缩减量,而且节约了经济成本.In order to reduce the treatment cost of high concentration electroless nickel plating waste bath,the combined process of oxidation-precipitation pretreatment-forward osmosis(FO)was used to concentrate and reduce the waste bath at room temperature.The aquaporin membrane(AQP)was used as the FO membrane,the draw solution was the 4M NaCl solution,and the FO process adopted the mode that the active layer was facing to feed solution(AL-FS).When H2O2 and CaO were used for pretreatment,the removal rates of electrical conductivity,TP,TOC and Ni of the waste bath are much higher than those of other pretreatment schemes.When 5%of CaO was added,the system water flux could reach 5.89 L·(m^(2)·h)^(-1);the rejection ratio of pollutants TP,Ni and TOC after concentration were 73.97%,92.90%and 84.65%,respectively.EEM results showed that organic-like humic acid fractions were more likely to pass through the semipermeable membrane from the feed solution to the draw solution than tyrosine or tryptophan protein-like substances.Taking the appropriate amount of CaO for pretreatment can not only effectively reduce the concentration and osmotic pressure of pollutants,which is conducive to the concentration of the subsequent FO process,but also save the economic cost.

关 键 词：正渗透 化学镀镍废槽液 氧化 沉淀 预处理 

分 类 号：X703[环境科学与工程—环境工程]