基于油酸钙加强析出及微生物絮凝剂GA1去除孔雀石绿的方法  

Method for malachite green removal by enhanced precipitation of calcium oleate and microbial flocculant GA1 flocculation

作　　者：肖怀香 杨朝晖[1,2] 宋佩佩 徐锐[1,2] 熊炜平 李鑫 张燕茹[1,2] XIAO Huaixiang;YANG Zhaohui;SONG Peipei;XU Rui;XIONG Weiping;LI Xin;ZHANG Yanru(College of Environmental Science and Engineering, Hunan University, Changsha 410082, China;Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, Hunan University, Changsha 410082, China;College of Resources and Environment, Shandong Agricultural University, Tai＇an 271018, China)

机构地区：[1]湖南大学环境科学与工程学院,长沙410082 [2]湖南大学环境生物与控制教育部重点实验室,长沙410082 [3]山东农业大学资源与环境学院,泰安271018

出　　处：《环境工程学报》2018年第6期1619-1628,共10页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(51378189;51578223;51521006)

摘　　要：提出利用油酸钙(Ca(OL)_2)加强析出和微生物絮凝剂GA1(MBFGA1)絮凝作用去除水溶液中阳离子染料孔雀石绿(MG)的方法。该方法将油酸纳(NaOL)对MG的增溶作用和Ca^(2+)对增溶了MG的NaOL胶团(NaOL-MG胶团)的作用结合起来,使MG以吸附在Ca(OL)2上的悬浮颗粒物的形式从水溶液中析出,随后利用微生物絮凝剂GA1(MBFGA1)将其絮凝沉降。考察了各因素NaOL、Ca^(2+)、MBFGA1的投加量对MG去除率及NaOL与Ca^(2+)相互作用的影响。基于这些研究,利用响应面分析法(RSM)和环境扫描电镜分析(ESEM)对MG去除机理及NaOL与Ca^(2+)之间结合机理进行了探讨。在最优的反应条件下,MG 0.14 mmol·L^(-1),NaOL 9 mmol·L^(-1),Ca^(2+)9 mmol·L^(-1),MBFGA1 4 mL,MG去除率可达98.13%。实验结果显示该方法高效环保,在实际染料废水处理中具有较大的应用潜力。Malachite green（MG）, a hazardous cationic dye, was removed from aqueous solution by a novel method containing calcium oleate（Ca（OL）2） enhanced precipitation and microbial flocculant GA1（MBFGA1） flocculation.This method combined the solubilization effect of sodium oleate（NaOL） micelles on MG and the Ca^2＋effect on NaOL micelles including the solubilized MG（NaOL-MG micelles） to make MG separated out from aqueous solution in a form of suspended particles, which then were flocculated and settled out by MBFGA1. The effects of factors,including NaOL, Ca^2＋, and MBFGA1 dosage, on the MG removal and the interaction between NaOL and Ca^2＋were investigated. Based on these investigations, MG removal mechanism and the interactive mechanism between NaOL and Ca^2＋were discussed and confirmed by the response surface methodology（RSM） and environmental scanning electron microscope（ESEM）. Under the optimum conditions of MG initial concentration 0.14 mmol·L^-1, NaOL dosage9 mmol·L^-1, Ca^2＋dosage 9 mmol·L^-1 and MBFGA1 dosage 4 mL, experimental results suggested that the MG removal rate would acquire 98.13%. These results showed that the method was highly efficient and environmentally friendly,and it seemed to hold strong applied potential to the treatment of real dye wastewater.

关 键 词：孔雀石绿 油酸钠 增溶 CA^2+ 微生物絮凝剂GA1 

分 类 号：X703.1[环境科学与工程—环境工程]