中南大学学报（自然科学版）2023，Vol.54Issue(11)：4283-4294,12.DOI:10.11817/j.issn.1672-7207.2023.11.007
生物炭负载纳米零价铁活化过硫酸盐降解水中菲的性能研究
Performance of degradation of phenanthrene in water with persulfate activated by nano zero-valent iron supported on biochar
摘要
Abstract
Biochar-supported nano zero-valent iron(BC@nZVI)is a novel and efficient non-homogeneous activation material that can activate persulfate(PS)for in situ chemical oxidation of PAHs in complex contaminated sites such as coking sites.Aiming to the performance of Phenanthrene(PHE)degradation by BC@nZVI activated PS and factors affecting phenanthrene(PHE)degradation,BC@nZVI was synthesized by liquid-phase reduction method.The pore structure,surface morphology,elemental distribution,structural morphology,phase composition,and functional groups of BC@nZVI were characterized by specific surface area analyzer(BET),scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffractometer(XRD),and Fourier transform infrared spectroscopy(FT-IR).The effects of Fe/C mass ratio,BC@nZVI dosage,initial concentrations of PHE,and PS concentrations on PHE degradation were investigated,and a pseudo-first-order kinetic model was used to fit the PHE degradation progress.The results show that BC serves as a support for nZVI and inhibites the agglomeration of nZVI,which improves the activation efficiency for PS.BC@nZVI with Fe/C mass ratio of 1꞉4 has the best effect on activating PS to degrade PHE.The degradation rate of PHE reaches 94.59%under the optimal conditions of initial PHE concentration of 1 mg/L,PS concentration of 1.6 mmol/L and BC@nZVI dosing of 0.6g/L.As the initial concentration of PHE increases,the degradation rate of PHE decreases;the degradation effect of PHE in acidic environment is better than that in neutral and alkaline environment.The main active species includes SO-4∙,∙OH and O-2∙ in the BC@nZVI/PS system.关键词
生物炭负载纳米零价铁/过硫酸盐/菲/活化/原位化学氧化Key words
biochar supported nano zero-valent iron/persulfate/phenanthrene/activation/in situ chemical oxidation分类
资源环境引用本文复制引用
周来,王一臣,李丹琼,张洁慧,朱雪强..生物炭负载纳米零价铁活化过硫酸盐降解水中菲的性能研究[J].中南大学学报（自然科学版）,2023,54(11):4283-4294,12.基金项目
国家重点研发计划项目(2020YFC1806502) （2020YFC1806502）
中国矿业大学重大项目培育项目(2020ZDPYMS07)(Project(2020YFC1806502)supported by the National Key Research and Development Program of China （2020ZDPYMS07）
Project(2020ZDPYMS07)supported by the Fundamental Research Funds for the Central Universities of China) （2020ZDPYMS07）
