原子能科学技术2016，Vol.50Issue(3)：402-409,8.DOI:10.7538/yzk.2016.50.03.0402
水合二氧化锰对Co2＋的吸附行为研究
Adsorption of Co2+ on Hydrated Manganese Dioxide
摘要
Abstract
The hydrated manganese dioxide (HMO ) was prepared by the oxidation‐reduction method with potassium permanganate as starting materials ,while the resulted HMO was characterized by XRD ,BET ,TG‐DTA and FT‐IR .In the adsorption experi‐ment ,the influences of various experimental conditions were investigated ,and HMO was also applied for the actual treatment of 60 Co wastewater .Experimental results show a good adsorption property of Co2+ on HMO ,in the condition of pH=7 and T=298 K , with a maximum adsorption capacity of 132.98 mg/g .The pH of the solution can signifi‐cantly affect Co2+ adsorbed on HMO ,and in the experimental pH range ,the adsorption capacity increases with pH .Under the same Co2+ initial concentration ,the adsorption capacity increases with temperature .Co2+ adsorption on HMO is influenced while Na+ , K+ ,M g2+ ,Ca2+ ,Zn2+ and Fe3+ coexisted in the solution .T he adsorption behavior of Co2+ on HMO is well described by pseudo‐second‐order kinetic model and Langmuir isotherm model (R2 >0.99) ,and it is indicated that the adsorption process maybe a chemical and monolayer adsorption . T he adsorption thermodynamics data of ΔH=46.96 kJ/mol andΔG= -26.09 kJ/mol show that the adsorption process is endothermic and spontaneous . In addition ,when treating wastewater containing 60Co whose initial radioactivity concen‐tration is 2.78 × 105 Bq/L in the dynamic column experiment ,the removal rate is 56.90% .关键词
Co2+/水合二氧化锰/吸附Key words
Co2+/hydrated manganese dioxide/adsorption分类
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李冬梅,唐军,刘宁,李飞泽,李兵,廖家莉,张劲松,陈云明,龚鑫,杨吉军,杨远友..水合二氧化锰对Co2＋的吸附行为研究[J].原子能科学技术,2016,50(3):402-409,8.基金项目
四川省应用基础研究计划资助项目 （）
