典型文献
Effect and mechanism of changes in physical structure and chemical composition of new biochar on Cu(Ⅱ)adsorption in an aqueous solution
文献摘要：
To improve the adsorption effect of biochar on heavy metal Cu(Ⅱ),we prepared new biochar and explored its modification process influence on original biochar's physical structure and chemical composition as well as its adsorption mechanism for Cu(Ⅱ)in an aqueous solution.Through research work,we have reached some significant conclusions:(1)The modified biochar(M2-800)can adsorb Cu(Ⅱ)at the rate of 98.039 mg g-1,38.8 times higher than that of the original biochar C800(2.525 mg g-1);(2)The biochar modification process boosts its etching and pore expansion,helping Cu(Ⅱ)enter the inner surface of the adsorbent,but chemical adsorption is still the most essential fixation method for Cu(Ⅱ);(3)The alkaline modification process promotes the formation of oxygen-containing functional groups,in which-OH/-COOH and iron ions would form C-O-Fe structures such as hydroxyl bridges(Fe-O-)and carboxy bridges(Fe-OOC-);(4)Carboxyl is the primary site of Cu(Ⅱ)fixation in M2-800,and M2-800 has higher electronegativity(-47.8 mV)and larger pH(11.61),so that Cu(Ⅱ)can be removed by electrostatic attraction and precipitation.
文献关键词：
中图分类号：
作者姓名：
Shengnan Yuan;Zhongxin Tan
作者机构：
Hubei Key Laboratory of Soil Environment and Pollution Remediation,Key Laboratory of Arable Land Conservation(Middle and Lower Reaches of Yangtze River),Ministry of Agriculture and Rural Affairs,College of Resources and Environment,Huazhong Agricultural University,Wuhan 430070,China
文献出处：
引用格式：
[1]Shengnan Yuan;Zhongxin Tan-.Effect and mechanism of changes in physical structure and chemical composition of new biochar on Cu(Ⅱ)adsorption in an aqueous solution)[J].土壤生态学快报（英文）,2022(03):237-253
A类：
B类：
Effect,mechanism,changes,physical,chemical,composition,new,biochar,adsorption,aqueous,solution,To,improve,effect,heavy,metal,prepared,explored,its,modification,process,influence,original,well,Through,research,work,have,reached,some,significant,conclusions,modified,M2,rate,times,higher,than,that,C800,boosts,etching,pore,expansion,helping,enter,inner,surface,adsorbent,but,still,most,essential,fixation,method,alkaline,promotes,formation,oxygen,containing,functional,groups,which,COOH,iron,would,structures,such,hydroxyl,bridges,carboxy,OOC,Carboxyl,primary,site,has,electronegativity,mV,larger,removed,by,electrostatic,attraction,precipitation
AB值：
0.540724
相似文献
机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
