摘要
为了比较不同提取方法对胞外聚合物(EPS)的提取及其吸附Cd(Ⅱ)的影响,考察了pH、单一物理提取方法和组合方法对脱水污泥中EPS的提取量及其对Cd(Ⅱ)的吸附能力的影响。结果表明:碱性条件在能够提高EPS提取量的同时,也能够提高EPS对Cd(Ⅱ)的吸附能力;不同物理处理方法对EPS的提取效率影响顺序为加热法>超声法>离心法,但其对Cd(Ⅱ)的吸附能力影响顺序为超声法>离心法>加热法;组合物理方法虽然较单一方法的EPS提取效率要高,但其提取EPS吸附Cd(Ⅱ)的能力较单一方法弱。以上结果可为EPS重金属吸附剂的有效提取和工业化应用提供参考。
To compare the effects of extraction methods on Cd(Ⅱ)adsorption by extracellular polymers(EPS),the EPS extraction amount and its adsorption capacity of Cd(Ⅱ)corresponding to different pH and physical extraction methods were studied.The results showed that the alkaline condition was beneficial to increase the EPS extraction amount and its Cd(Ⅱ)adsorption capacity accordingly.The EPS extraction efficiency by different physical treatment methods followed the sequence of heating method>ultrasonic method>centrifugal method,while the adsorption capacity of Cd(Ⅱ)followed the sequence of ultrasonic method>centrifugal method>heating method.Although the combined physical method was more efficient than the single method in EPS extraction,its Cd(Ⅱ)adsorption capacity was lower than single method.The result of this study can provide some theoretical guidance for the extracted EPS as heavy metal adsorbent.
作者
林伟雄
顾海奇
郑诗琳
武纯
陈楠纬
杨帆
孙水裕
LIN Weixiong;GU Haiqi;ZHENG Shilin;WU Chun;CHEN Nanwei;YANG Fan;SUN Shuiyu(School of Environmental and Chemical Engineering,Zhaoqing University,Zhaoqing 526061,China;School of Environmental Science and Engineering,Guangdong University of Technology,Guangzhou 510006,China;Guangdong Polytechnic of Environmental Protection Engineering,Foshan 528216,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2020年第3期829-834,共6页
Chinese Journal of Environmental Engineering
基金
国家重点研发计划(2018YFD0800702)
广东省高校青年创新项目(2017GkQNCX043)
佛山市科技创新项目(2017AG100072)
肇庆学院科研基金资助项目(201914)。
