废弃胺肟树脂气流膨化碳化及其吸附Pb2+研究
Study on Gas Flow Expansion Carbonization of Waste Amine Oxime Resin and Its Adsorption of Pb2+
蒋延明 1廖艳 1刘云 1黄嘉欣 1韦凤 1唐春海 1马少健 1何春林1
作者信息
- 1. 广西大学资源环境与材料学院,广西南宁 530004;省部共建特色金属材料与组合结构全寿命安全国家重点实验室,广西南宁 530004
- 折叠
摘要
胺肟树脂作为镓的吸附树脂,在反复吸附-解吸1月后失效,孔道塌陷官能团失效,每年产生废弃树脂量大.为了对废弃胺肟树脂进行资源化利用,提出"爆米花"式气流膨化法对废胺肟树脂进行膨化扩孔处理,并探究膨化树脂对溶液Pb2+离子的吸附行为,膨化实验和吸附实验结果表明:废胺肟树脂的含水率,罐体预热温度,膨化压力对膨化效果影响大:膨化树脂对溶液中对Pb2+的饱和吸附容量为221.02 mg/g,吸附符合准二级动力学(R2=0.9999)和Langmuir等温模型(R2=0.9906),主要以化学吸附为主.研究结果为废弃胺肟树脂再生利用及溶液含铅废水处理提供一种新吸附材料,为废弃胺肟树脂对资源化处理提供一种新途径.
Abstract
The amine oxime resin,as an adsorption resin for gallium,fails after 1 month of repeated adsorption-desorption,and the pore collapse functional group fails,resulting in a large amount of waste resin every year.In order to resource utilization of waste amine oxime resin,we proposed the"popcorn"type airflow expansion method to expand the pore of waste amine oxime resin and investigate the adsorption behavior of the expanded resin on Pb2+ions in solution.The results of the puffing and adsorption experiments showed that the water content,tank preheating temperature and puffing pressure of the waste amine oxime resin had a significant effect on the puffing effect;the saturation capacity of the puffing resin for Pb2+ in solution was 221.02 mg/g,and the adsorption was in accordance with the quasi-secondary kinetics(R2=0.9999)and the Langmuir isothermal model(R2=0.9906),mainly by chemisorption.The results provide a new adsorption material for the regeneration of waste amine oxime resin and the treatment of lead-containing wastewater in solution,and provide a new way for the resource treatment of waste amine oxime resin.
关键词
胺肟树脂/铅/气流膨化/吸附/螯合Key words
amine oxime resin/lead/air puffing/adsorption/chelation引用本文复制引用
基金项目
广西大学创新创业培训项目(202110593349)
广西自然科学基金(2021GXNSFAA220096)
国家自然科学基金(51804084)
出版年
2024
NETL
NSTL
万方数据