摘要
天祝褐煤资源丰富,其提取腐植酸后的残渣对污水中的有害物质有一定的吸附能力。为此,制备了天祝褐煤提取腐植酸后的残渣,研究了其对污水中重金属离子Cr(Ⅵ)的吸附性能。结果表明:在室温(20～25℃),pH值为5的条件下,褐煤残渣对Cr(VI)有较好的吸附性能,吸附平衡时间约为4h;吸附规律符合Freundlich吸附等温式,其相关系数R2为0.9686,特性常数n为2.0446,其吸附过程可用Ho准二级反应动力学模型描述。
The residue of lignitic coal in Tianzhu after humic acid extraction was prepared,and the adsorption performance of the residue for Cr(VI) in sewage was evaluated.Results show that the residue of lignitic coal after humic acid extraction can well ad-sorb Cr(VI) in sewage at a room temperature of 20～ 25 ℃ and pH value of 5.The adsorption equilibrium was reached in about 4 h,and the adsorption obeyed Freundlich adsorption isothermal equation.The correlation coefficient R2 was 0.968 6,and the characteristic constant n was 2.044 6.The adsorption process could be described by Ho pseudo second-order dynamic model.
出处
《材料保护》
CAS
CSCD
北大核心
2010年第9期63-65,共3页
Materials Protection
基金
甘肃省自然科学基金项目(1010RJZA073)
兰州交通大学校项目(40427)资助
关键词
CR(VI)
吸附
褐煤残渣
腐植酸
动力学
吸附等温式
Cr(Ⅵ)
adsorption
residue of lignitic coal
humic acid
dynamic
adsorption isothermal equation
