食物废弃物基吸附剂对水中重金属的吸附  

Adsorption of Heavy Meals From Aqueous Solutions by Adsorbent From Food Waste

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作  者:范晓丹[1,2] 张襄楷[1,3] 

机构地区:[1]天津城建大学环境与市政工程学院,天津300384 [2]天津市水质科学与技术重点实验室,天津300384 [3]天津大学材料学院,天津300072

出  处:《工业安全与环保》2016年第1期11-13,48,共4页Industrial Safety and Environmental Protection

基  金:天津市应用基础及前沿技术研究计划(07JCZDJC02200);天津市高校"中青年骨干创新人才培养计划"

摘  要:研究用食物废弃物制得的吸附剂(FRA)对水中多种重金属的吸附,并研究酒石酸钾钠对FRA吸附重金属的影响,探讨影响的机理。结果表明,两种重金属离子共存体系中重金属离子的竞争吸附系数相当,均在0.46~0.54之间。增加共存重金属种类减弱FRA对重金属的吸附效果。初始浓度较低时,竞争吸附对FRA吸附量的影响较小。较低p H值时酒石酸钾钠的浓度对重金属Cu^(2+),Zn^(2+)及Cd^(2+)的吸附去除效果影响更大。FRA对Cu^(2+),Zn^(2+),Pb^(2+)和Cd^(2+)的吸附符合Langmuir等温式。Absorbent prepared from food waste (FRA) is used to study the competitive adsorption of heavy metal ions in co- existing system and the effects of potassium sodium tam'ate on adsorption of heavy metal ions also are studied to understand the influence mechanism. The results indicate that the competitive coefficients are even and arrange from 0.46 to 0.54 in the system with two kinds of heavy metals. The adsorption of heavy metal ions decreases with the increase of the kinds in the system. The competitive adsorptions are weak when the initial concentration of heavy metal ions is lower. The effects of potassium sodium tartrate on the adsorption of Cu^2 + , Zn^2+ and Cd^2+ are great at lower pH. Langmuir isotherm model is ap- plied to describe the adsorption of the heavy metals ions onto FRA.

关 键 词:吸附剂 食物废弃物 重金属 吸附 酒石酸钾钠 

分 类 号:X781.1[环境科学与工程—环境工程]

 

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