不同形貌纳米二氧化锰对三价砷吸附性能及机理研究
Adsorption Performance and Mechanism of Different Morphologies nano-MnO2 on Arsenic(III)
投稿时间:2017-12-18  修订日期:2018-01-29
DOI:10.12119/j.yhyj.201903003
中文关键词:  水热合成  二氧化锰  三价砷  吸附机理
英文关键词:Hydrothermal method  MnO2  Arsenic(III)  Adsorption mechanism
基金项目:国家自然科学基金项目(41472078)
作者单位E-mail
姚利娜 中国科学院青海盐湖研究所,青海西宁 810008
中国科学院大学化学化工学院,北京 100049 
yaolina166@163.com 
许乃才 青海师范大学化学化工学院,青海西宁 810008  
董亚萍 中国科学院青海盐湖研究所,青海西宁 810008  
李武 中国科学院青海盐湖研究所,青海西宁 810008  
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中文摘要:
      以高锰酸钾和一水硫酸锰为原料,采用水热合成法,合成得到了花状和海胆状纳米二氧化锰吸附剂。研究了两种吸附剂对三价砷的吸附选择性、循环利用性及除砷机理。结果表明,阴离子对花状和海胆状吸附剂吸附三价砷的影响顺序略有不同,其分别为PO3-4> CO2-3>HCO-3>NO-3>SO2-4>Cl-,PO3-4>HCO-3>SO2-4>CO2-3>NO-3>Cl-;花状和海胆状二氧化锰经三次循环再生后的除砷率分别为65.5%和75.1%;两种吸附剂对三价砷的吸附机理主要为氧化吸附作用。
英文摘要:
      Flower-like and sea-urchin-like MnO2 nanoparticles were successfully synthesized by the hydrothermal method. The adsorption selectivity, recycling performance, and adsorption mechanism of arsenic(III) were systematically studied. The results showed that some anions had significant effect on the fluoride removal by flower-like and sea-urchin-like MnO2, and the influence orders were PO3-4>CO2-3>HCO-3>NO-3>SO2-4>Cl-,PO3-4>HCO-3>SO2-4>CO2-3>NO-3>Cl-,respectively.The arsenic(III) removal rate fell to 65.5% and 75.1% after three adsorption and desorption cycles. In addition, the adsorption mechanism mainly was the synergistic effects of effective oxidizing and adsorptive performance.
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