【摘要】 以农业废弃物花生壳为原料制备生物炭,对其表面形貌及孔结构进行了表征,对其吸附水中Pb(Ⅱ)的行为进行了研究.结果表明,花生壳生物炭对Pb(Ⅱ)的吸附在120 min达到平衡,吸附过程符合准二级动力学方程.Langmuir吸附模型能够很好的模拟吸附等温线,最大饱和吸附量为68.22 mg·g-1.吸附热力学结果显示,花生壳生物炭对Pb(Ⅱ)的吸附主要以化学吸附为主,升高温度有利于吸附.更多还原

【Abstract】 The biochar was prepared by using peanut shell as raw materials. The surface pattern and pore structure of peanut shell biochar were characterized and the adsorption property for Pb(Ⅱ) from water onto peanut shell biochar was studied.The results indicated that the adsorption of Pb(Ⅱ) on peanut shell biochar reached equilibrium within 120 min,which accorded the second-order kinetic model.The adsorption data can be fitted by Langmuir model and the maximum adsorption capacity is 68.22 mg·g-1.The thermodynamics results showed that chemical adsorption was predominant in the adsorption process and increasing temperature is beneficial to the adsorption.更多还原