A functionalized activated carbon adsorbent prepared from waste amidoxime resin by modifying with H_(3)PO_(4) and ZnCl_(2) and its excellent Cr(Ⅵ)adsorption  

作　　者：Chunlin He Yun Liu Mingwei Qi Zunzhang Liu Yuezhou Wei Toyohisa Fujita Guifang Wang Shaojian Ma Wenchao Yang 

机构地区：[1]School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China [2]State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,Guangxi University,Nanning 530004,China [3]School of Nuclear Science and Technology,University of South China,Hengyang 421000,China [4]School of Nuclear Science and Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [5]Key Laboratory of New Low-carbon Green Chemical Technology,Education Department of Guangxi Zhuang Autonomous Region,Nanning 530004,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2024年第3期585-598,共14页矿物冶金与材料学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.52364022);the Natural Science Foundation of Guangxi Province,China (Nos.2023JJA160192 and 2021GXNSFAA220096);the Guangxi Science and Technology Major Project,China (No.AA23073018);the Guangxi Chongzuo Science and Technology Plan,China (No.2023ZY00503).

摘　　要：With the application of resins in various fields, numerous waste resins that are difficult to treat have been produced. The industrial wastewater containing Cr(Ⅵ) has severely polluted soil and groundwater environments, thereby endangering human health. Therefore, in this paper, a novel functionalized mesoporous adsorbent PPR-Z was synthesized from waste amidoxime resin for adsorbing Cr(Ⅵ). The waste amidoxime resin was first modified with H3PO4 and ZnCl_(2), and subsequently, it was carbonized through slow thermal decomposition. The static adsorption of PPR-Z conforms to the pseudo-second-order kinetic model and Langmuir isotherm, indicating that the Cr(Ⅵ) adsorption by PPR-Z is mostly chemical adsorption and exhibits single-layer adsorption. The saturated adsorption capacity of the adsorbent for Cr(Ⅵ) could reach 255.86 mg/g. The adsorbent could effectively reduce Cr(Ⅵ) to Cr(Ⅲ) and decrease the toxicity of Cr(Ⅵ) during adsorption. PPR-Z exhibited Cr(Ⅵ) selectivity in electroplating wastewater. The main mechanisms involved in the Cr(Ⅵ) adsorption are the chemical reduction of Cr(Ⅵ) into Cr(Ⅲ) and electrostatic and coordination interactions. Preparation of PPR-Z not only solves the problem of waste resin treatment but also effectively controls Cr(Ⅵ) pollution and realizes the concept of “treating waste with waste”.

关 键 词：waste amidoxime resin mesoporous adsorbent H_(3)PO_(4)and ZnCl_(2)processing Cr(VI)adsorption electroplating wastewater 

分 类 号：TQ424[化学工程] X703[环境科学与工程—环境工程]