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采用恒温批处理平衡法研究生物炭热解温度、吸附剂质量、吸附质溶液初始p H值对锰改性玉米秸秆生物炭吸附1,4-苯醌的影响,并进行了动力学和热力学分析。经Mn SO4改性的玉米秸秆生物炭明显提高了对1,4-苯醌的吸附去除能力,同时热解温度的升高能大幅度提高其吸附能力,当吸附剂质量为20 mg时,1,4-苯醌的吸附量和去除率为最佳值。p H=8.0时吸附量最高,达到75.977 mg/g。准二级动力学模型能够更好地描述该吸附过程,其控制步骤为化学吸附。等温吸附试验结果表明,锰改性玉米秸秆生物炭吸附1,4-苯醌的机理主要以多分子层吸附为主,伴随表面单分子层吸附。
The effects of biotransformation temperature, adsorbent mass and initial p H value of adsorptive solution on 1,4-benzoquinone biosorption by manganese-modified corn stalk were investigated by constant temperature batch equilibrium method. Kinetic and thermodynamic analysis . The biotransformation of corn stalks with Mn SO 4 significantly increased the adsorption and removal capacity of 1,4-benzoquinone, while the increase of pyrolysis temperature could greatly improve the adsorption capacity. When the mass of adsorbent was 20 mg, The adsorption amount and removal rate of 4-benzoquinone are the best. The adsorption capacity reached the highest at p H = 8.0, reaching 75.977 mg / g. Quasi-second-order kinetic model to better describe the adsorption process, the control step is chemisorption. The results of isothermal adsorption experiments showed that the mechanism of adsorption of 1,4-benzoquinone by biochar on manganese-modified corn stalk was dominated by multi-molecular layer adsorption, accompanied by the adsorption of monolayers on the surface.