摘要
印染废水因其成分复杂,并且难以被自然去除,己成为环境的重点污染源之一.本研究采用甘蔗渣还原液还原氧化石墨烯,并负载伯克霍尔德菌成功制备了新型生物纳米材料MNMs.采用SEM-EDS-Mapping和Raman分析证实该材料具有较好的结构稳定性和良好的吸附效果,并对印染废水的典型污染物Cd^(2+)和孔雀石绿的联合去除率均达到80%以上.GC-MS检测结果证实该复合纳米材料可将孔雀石绿降解为N,N-二甲基苯胺和4-(二甲基氨基)二苯甲酮.动力学拟合分析表明Cd^(2+)和孔雀石绿被MNMs吸附过程遵循伪二级速率模型(R^(2)>0.99),而MG的降解过程更遵循伪一级速率模型(R^(2)>0.99).MNMs对Cd^(2+)和MG的理论最大吸附量分别为84.03 mg·g^(-1)和45.25 mg·g^(-1).研究结果表明,该生物纳米材料对水溶液中Cd^(2+)和孔雀石绿有较好的去除效果,未来可应用于工业印染废水的污染控制.
Printing and dyeing wastewater has become one of the important sources of environment pollution due to its complex components and is difficult to remove naturally.In this study,bagasse was used as a reducing agent of graphene oxide,and Burkholderia cepacia was loaded to prepare a new bio-nanomaterial(MNMs).SEM-EDS-Mapping and Raman characterization results showed that the bio-nanomaterial has good structural stability and adsorption capacity.The removal efficiency of Cd^(2+)and malachite green(MG)in printing and dyeing wastewater reached more than 80%.The GC-MS analysis showed that the degradation products of MG were N,N-dimethylaniline and 4-(dimethylamino)benzophenone.The kinetic analysis showed that the adsorption process of Cd^(2+)and MG by MNMs follows the pseudo second-order model(R^(2)>0.99),and the degradation process of MG fits better with the pseudo-first-order model(R^(2)>0.99).The maximum adsorption capacity for Cd^(2+)and MG are 84.03 mg·g^(-1) and 45.25 mg·g^(-1),respectively.The results indicated that the bio-nanomaterial has a good removal efficiency of Cd^(2+)and MG,and it can be used as a potential material for the treatment of printing and dyeing wastewater.
作者
张涛
薛超
ZHANG Tao;XUE Chao(School of Environmental Science and Engineering,Fujian Normal University,Fuzhou 350000;Fujian Key Laboratory of Pollution Control and Resource Recycling,Fuzhou 350000)
出处
《环境科学学报》
CAS
CSCD
北大核心
2021年第6期2138-2146,共9页
Acta Scientiae Circumstantiae
基金
福建师范大学人才建设基金(No.Z0210509)
国家自然基金青年科学基金项目(No.52004067)
福建省自然科学基金项目(No.2020J05043)
福建省中青年教师教育科研项目(No.JAT190080)。
关键词
绿色合成
石墨烯
伯克霍尔德菌
镉
孔雀石绿
green synthesis
graphene oxide
Burkholderia cepacia
cadmium
malachite green
