利用废胺肟（WAO）树脂通过微波制备碳及其对水中Pb(II)的去除
Utilization of Waste Amine-Oxime (WAO) Resin to Generate Carbon by Microwave and Its Removal of Pb(II) in Water.
作者信息
He Chunlin, Liu Yun, Zheng Chunhui, Jiang Yanming, Liao Yan, Huang Jiaxin, Fujita Toyohisa, Wei Yuezhou, Ma Shaojian
机构信息
School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China.
Guangxi Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials, Guangxi University, Nanning 530004, China.
出版信息
Toxics. 2022 Aug 23;10(9):489. doi: 10.3390/toxics10090489.
Utilising waste amine-oxime (WAO) resin through microwave semi-carbonization, a carbon adsorbent (CA) was obtained to remove Pb(II). After microwave treatment, the pore size of the skeleton structure, three-dimensional porous network, and lamellar pore structure of WAO was improved. The distribution coefficient (Kd) of Pb(II) onto CA is 620 mL/g, and the maximum adsorption capacity of Pb(II) is 82.67 mg/g after 20 min of WAO microwave treatment. The adsorption kinetics and adsorption isotherms conform to the quasi-second-order kinetic equation and Langmuir adsorption isotherm model, respectively. The surface of MT-WAO is negatively charged and the adsorption mechanism is mainly electrostatic interaction. Pb(II) elution in hydrochloric acid solution is more than 98%, and its recovery is high at 318 K and for 1 h.
通过微波半碳化利用废胺肟（WAO）树脂，制备了一种用于去除Pb(II)的碳吸附剂（CA）。微波处理后，WAO的骨架结构、三维多孔网络和层状孔结构的孔径得到改善。Pb(II)在CA上的分配系数（Kd）为620 mL/g，WAO微波处理20分钟后，Pb(II)的最大吸附容量为82.67 mg/g。吸附动力学和吸附等温线分别符合准二级动力学方程和朗缪尔吸附等温线模型。MT-WAO表面带负电荷，吸附机制主要是静电相互作用。在盐酸溶液中Pb(II)的洗脱率超过98%，在318 K下洗脱1小时时其回收率较高。
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