摘要： 以鸡粪和玉米芯的混合物为原料，制备热解生物炭前驱体（BPC），并用尿素对其水热改性，得到水热改性热解生物炭（HMPC），研究了HMPC对废水中Cr（Ⅵ）和甲基橙（MO）的吸附性能。结果表明，在温度为25℃，Cr（Ⅵ）、MO溶液初始pH分别为2.0、6.5，搅拌速率为150 r/min，HMPC投加量为1 g/L的条件下，对初始质量浓度为100 mg/L的Cr（Ⅵ）、MO的吸附量分别为56.26、73.31 mg/g。HMPC对Cr（Ⅵ）和MO的吸附较好地遵循准二级动力学模型。Langmuir模型更好地拟合HMPC对Cr（Ⅵ）和MO的吸附行为。

关键词: 改性生物炭, Cr(Ⅵ), 甲基橙, 吸附

Abstract: The hydrothermal modified pyrolysis biochar(HMPC) has been obtained,by using the mixtures of chicken manure and corn cobs as raw materials,preparing pyrolysis biochar precursor(BPC),and modifying its hydrothermal reaction with urea. The adsorption capabilities of this HMPC for Cr(Ⅵ) and methyl orange(MO) in wastewater are evaluated. The results show that when the temperature is 25℃,initial pH value of Cr(Ⅵ) and MO are 2.0 and 6.5, stirring speed is 150 r/min,and dosage of HMPC is 1 g/L,the adsorption capacities of Cr(Ⅵ) and MO with initial mass concentration 100 mg/L reach 56.26 mg/g and 73.31 mg/g,respectively. The adsorption of HMPC for Cr(Ⅵ) and MO complies with the pseudo-second-order kinetics model. Langmuir isotherm model can simulate the adsorption behaviors of HMPC for Cr(Ⅵ) and MO better.

Key words: modified biochar, Cr(Ⅵ), methyl orange, adsorption

中图分类号: 

• X703