Preparation of peanut shell active carbon for the removal of lead (II) ionfrom aqueous solution
An abundant and low-cost agricultural waste as peanut shell was used as raw material in the preparation of powdered activated carbon by one-step phosphoric acid in this work. The evolution of pore structure at different H3PO4 concentrations, H3PO4/peanut shell ratios, and in the activation temperature range of 300 ～500 ℃ were investigated through various characterization techniques. The yield and the lead (II) ion removal capacity of peanut shell activated carbon were also analyzed. The experimental results show that the key factor affect the yield of active carbon was activation temperature, and the phosphoric acid concentration is the most important factor to the lead (II) ion adsorption capacity of peanut shell activated carbon. The peanut shell-based active carbon with lead (II) adsorption capacity as high as 5.12 mg·g -1 (the lead ion concentration of model solution is 5 mg·L -1 ), BET surface area of 1018.5 m 2 ·g -1 , the total pore volume of 0.754 cm 3 ·g -1 , the average pore size of 2.961 nm was produced under the conditions of phosphoric acid concentration of 75％, impregnation of 150％ and activation temperature of 300 ℃. The element composition analysis results indicated that the carbon composition of peanut shell activated carbons increased with increase in activation temperature and the phosphoric acid concentration.
peanut shell active carbon adsorption lead ion impregnation
XU Tao LIU Xiaoqin
State Key Laboratory of Materials-oriented Chemical Engineering, Nanjing University of Technology, Nanjing 21009, China
国际会议
第四届中日化工学术研讨会(The 4th Joint China/Japan Chemical Engineering Symposium)(CJCES)
成都
英文
2007-12-19（万方平台首次上网日期，不代表论文的发表时间）