摘要
以生物质热解副产物半焦为吸附剂,研究了对水中磷的吸附动力学行为及其主要影响因素。实验结果表明,生物质半焦对水中磷的平衡吸附量为9.71 mg/g,该吸附过程能够较好地符合准一级动力学模型。此外,磷在生物质半焦上的等温吸附能较好地用Freundlich吸附等温线方程表示。在半焦用量为3 g/L、温度为40℃、pH值为3的条件下,水中磷的吸附去除率达到98.86%。作为一种廉价工业副产物,生物质半焦对水中磷具有良好的去除效果。
Biomass char is prepared from pyrolysis,and the kinetics of phosphate adsorbed by biomass char in aqueous solution and influence factors are studied. The results show that the equilibrium adsorption capacity of biomass char is 9.71 mg/g,the adsorption of phosphate follows the pseudo second-order kinetics model and the adsorption isotherm is described by Freundlich model.The removal rate of phosphate can reach 98.86 % under conditions of 3 g/L of biomass char,40 ℃ of reaction temperature and pH value of 3.As one of the industrial by-products,biomass char can effectively remove phosphate from aqueous solution.
出处
《工业安全与环保》
北大核心
2011年第5期6-8,共3页
Industrial Safety and Environmental Protection
关键词
生物质半焦
吸附动力学
吸附等温线
除磷
biomass chars kinetics of adsorption adsorption isotherm phosphate removal
