Vanadium(V)reduction by using a by-product of the yellow phosphorus industry  

作　　者：Baibin Yang Shihong Chen Haowen Ren Yang Qiu Chong Chen Yong Guo Chunhui Luo Qiang Zhao Wei Yang 

机构地区：[1]School of Chemical Engineering,Sichuan University,Chengdu 610065,China [2]State Key Laboratory of Hydraulics and Mountain River Engineering,College of Water Resource&Hydropower,Sichuan University,Chengdu 610065,China

出　　处：《Chinese Journal of Chemical Engineering》2023年第10期150-158,共9页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foundation for Young Scientists of China(22108185,51906168,52276208).

摘　　要：Release of vanadium(V)from industry has threatened the environment and human health.In this paper,a removal method of vanadium(V)is proposed using a by-product of the yellow phosphorus industry(phosphorus-iron)as a reducing agent.The thermodynamics analysis shows that the Gibbs free energy is always negative from 0 to 100℃,indicating a spontaneous process.Effect of the phosphorus-iron slag/sulfuric acid dosage and temperature on the removal efficiency is comprehensively studied,and the kinetics parameters are calculated based on a quasi-first order reaction kinetics model.Results indicate that vanadium(V)can be entirely reduced by using phosphorus-iron slag,the frequency factor and apparent activation energy are 3.23×10^(9)min^(-1)and 64.50 kJ.mol^(-1) for vanadium(V)reduction.Based on above results,a lab-scale reactor is constructed and achieves a removal efficiency of~100%and a treatment capacity of 200 ml vanadium(V)solution(2 g.L^(-1))within 3 h.This work demonstrates the feasibility of vanadium(V)reduction using phosphorus-iron slag as a reducing agent in applications.

关 键 词：VANADIUM Phosphorus-iron slag THERMODYNAMICS KINETICS REDUCTION 

分 类 号：TQ031.6[化学工程] X703[环境科学与工程—环境工程]