梧桐树皮活性炭对水中铬离子吸附性能研究

Study on adsorption property of Cr^(6+) by sycamore bark activated carbon

研究了梧桐树皮活性炭对水中铬离子的吸附性能,探讨了其吸附机理,得出相关热力学参数。研究结果表明用0.4 g梧桐树皮活性炭处理50 m L的100 mg/L的Cr^(6+)溶液,在25℃下,pH2,静置吸附180 min后Cr^(6+)的去除率可以达到99.8%;梧桐树皮活性炭对Cr^(6+)的吸附符合Langmuir模型,10℃时的饱和吸附量为7.888 mg/g,为单分子层吸附。

The adsorption property of Cr^6＋ by sycamore bark activated carbon was studied. The related thermodynamic parameters were obtained. The research results showed that using 0. 4 g sycamore bark activated carbon for the treatment of 50 mL Cr^6＋solution concentration of 100 mg / L,under the condition of temperature,p H and adsorption time of 25℃,2. 0 and 180 min,the removal rate of Cr^6＋ reached to 99. 8%. Sycamore bark activated carbon adsorption of Cr^6＋conformed to the Langmuir model,and it the saturated adsorption capacity was 7. 888 mg / g when the temperature was 10℃.