虾壳生物炭对水溶液中铅离子的吸附研究

Adsorption of Lead in Aqueous Solution by Crayfish Shell-derived Biochar

以废弃虾壳为原料,通过高温炭化后酸洗脱钙制备多孔生物炭(SBC),并利用SEM、TG、DTA和BET等进行表征,研究了其对铅离子吸附特性。结果表明,SBC-800比表面积为291.2997 m^2/g,在pH值为5、铅离子初始质量浓度为200 mg/L、接触时间2 h的条件下,SBC对Pb^2+溶液的吸附量达到87.4 mg/g。SEM-EDS分析表明:Pb^2+吸附到生物炭表面。

Crayfish shells were used to prepare porous biochar in high temperature.SEM,TG,DTA and BET were employed to determine the structure of the biochars,and their adsorption proterties were studied in details.The results showed that the specific surface area of SBC-800 was 291.2997 m^2/g,and when pH was 5,the initial concentration of lead ions was 200 mg/L and contact time was 2 h,the adsorption capacity of SBC to Pb^2+reached 87.4 mg/g.SEM-EDS analysis showed that Pb^2+was adsorbed on the surface of biochar.