改性生物炭活化过硫酸盐去除罗丹明B  

Removal of Rhodamine B by Activated Persulfate with Modified Biochar

作　　者：王宇航 邓德明[1] WANG Yuhang;DENG Deming(School of Resource and Environmental Sciences,Wuhan University,Wuhan 430072,China)

机构地区：[1]武汉大学资源与环境科学学院,湖北武汉430072

出　　处：《水处理技术》2022年第6期85-89,共5页Technology of Water Treatment

基　　金：武汉市科技攻关计划资助项目(201260723227)。

摘　　要：以废弃椰壳为原料、高锰酸钾为活化剂,采用一锅法合成了多孔分级碳材料(HPC),并用其活化过硫酸钠(PS)用于去除罗丹明B(RhB)。通过XRD、SEM对样品的结构、形貌进行了表征,并初步探索了HPC吸附RhB,HPC/PS去除RhB的机理;研究了催化剂用量、PS浓度、溶液初始pH等对HPC/PS去除RhB效果的影响以及HPC的稳定性。结果表明,与未改性的生物炭(BC)相比,HPC的吸附能力提高了1.5倍;SO_(4)^(-)是HPC活化PS去除RhB的主要活性物种;HPC为0.5 g/L,PS浓度为5 mmol/L,溶液初始pH为2.24时,反应120 min后RhB的去除率达到95%;HPC具有较好的稳定性,循环使用4次后活化PS去除RhB的效率仍达86%。In this work,a hierarchical porous carbon(HPC),which was synthesized by one-step method using waste coconut shell as precursor and potassium permanganate as activator,was applied to activate persulfate(PS)for the degradation of Rhodamine B(RhB).The structure and morphology of the samples were characterized by XRD and SEM.We used RhB as the simulation contaminants,studying the mechanism of RhB degradation in HPC/PS preliminarily;investigating the effects of catalyst content,PS content and initial pH of solution on the removal of RhB;analyzing the reusability and stability of HPC.The results show that,compared with BC,The adsorption capacity of HPC was increased by 1.5 times;SO_(4)^(-)was the main active species for the removal of RhB in HPC/PS;when HPC was 0.5 g/L,PS was 5 mmol/L,and the initial pH of RhB solution was 2.24,the removal rate of RhB reached 95%after 120 min;HPC has good reusability for the degradation rate of RhB still reached 86%after four cycles.

关 键 词：高级氧化 过硫酸盐 硫酸根自由基 生物炭改性 罗丹明B 

分 类 号：X703[环境科学与工程—环境工程]