玉米芯生物碳吸附水中Cd^(2+)的影响因素研究  

Corn cob bio-carbon for adsorption of Cd^(2+) and influencing factors

作　　者：程嵩[1] 樊建军[1] 张菊萍[2] 罗少凡 

机构地区：[1]广州大学土木工程学院,广东广州510006 [2]华南理工大学环境与能源学院,广东广州510006 [3]广州市市政集团设计院有限公司,广东广州510000

出　　处：《广州大学学报（自然科学版）》2015年第4期66-72,共7页Journal of Guangzhou University:Natural Science Edition

基　　金：十一五国家水体污染控制与治理重大专项资助项目(2009ZX07423-003)

摘　　要：用玉米芯制备生物碳,并通过批处理平衡试验,分析了生物碳对Cd2+的吸附热力学、吸附动力学以及影响其吸附的因素,结果表明:生物碳的产率随着热解温度升高逐渐降低且其颜色呈现红棕色-浅黑色-黑色-深黑色变化,其对Cd2+的吸附在12 h达到平衡,吸附量随着p H的升高而增加,该吸附反应在常温下是自发进行的,反应更符合Langmuir模型,动力学更符合准二级动力学模型.Preparation of bio-char with corn bco ,and through the batch balance test,analysis of the bio-char thermodynamics,kinetics of Cd2 + and factors that affect the adsorption,the results showed that the yield of the bio-carbon with pyrolysis temperature decreases gradually and the colors red brown-shallow black-black-deep black change,its adsorption of Cd2 +1 2 hours in balance,the adsorption quantity increases with the increase of pH,the adsorption reaction is spontaneous reaction,reaction conforms to the Langmuir model,dynamic more accordant with the secondary dynamic model.

关 键 词：生物碳 玉米芯 CD^2+ 吸附机理 吸附动力 吸附热力学 

分 类 号：X172[环境科学与工程—环境科学]