摘要
针对富硒养殖业中潜在的硒与抗生素共存废水,以虾壳制备的氮掺杂多孔生物炭(NBC)为骨架,原位合成纳米零价铁(nZVI),构建具有NBC和nZVI活性功能成分的复合材料(NBC-nZVI),采用扫描电镜(SEM)、氮气吸附、X射线衍射(XRD)、傅里叶红外光谱(FTIR)和X射线光电子能谱(XPS)表征样品。考察NBC-nZVI对Se(Ⅳ)和环丙沙星(CIP)的同步吸附行为。结果表明,NBC-nZVI对CIP和Se(Ⅳ)的去除性能优于NBC和nZVI;Se(Ⅳ)优先于CIP被吸附于NBC-nZVI表面,并介导CIP的吸附,提高NBC-nZVI对CIP的去除性能;CIP对NBC-nZVI吸附Se(Ⅳ)无明显影响;双组分体系中NBC-nZVI对CIP和Se(Ⅳ)的吸附行为符合准二级动力学和Sips等温模型,对CIP与Se(Ⅳ)的最大理论吸附量分别为130.6,335.7 mg/g。
Aiming at the potential hazard of the wastewater with the coexistence of selenium and antibiotics in selenium-enriched aquaculture,nano zero-valent iron(nZVI)was in situ synthesized on the N-doped porous biochar(NBC)prepared by shrimp shells,resulting in the composites(NBC-nZVI)with active functional components of NBC and nZVI.The samples were characterized by scanning electron microscopy(SEM),nitrogen adsorption,X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR)and X-ray photoelectron spectroscopy(XPS).Taking Se(Ⅳ)and ciprofloxacin(CIP)as the targeted pollutants,the simultaneous adsorption behavior of NBC-nZVI was investigated.The results showed that the removal performance of NBC-nZVI toward CIP and Se(Ⅳ)was superior to that of NBC and nZVI.Se(Ⅳ)was preferentially adsorbed on the surface of NBC-nZVI compared to CIP,which mediated the adsorption of CIP and improved the removal performance of NBC-nZVI to CIP.The adsorption of NBC-nZVI for Se(Ⅳ)was nearly immune to CIP.The adsorption behavior of NBC-nZVI toward CIP and Se(Ⅳ)in the bicomponent system followed the pseudo-second-order kinetics and Sips isotherm model,and the theoretical maximum adsorption capacities for CIP and Se(Ⅳ)were 130.6,335.7 mg/g,respectively.
作者
吴明燏
滕鑫
梁兴唐
尹艳镇
WU Ming-yu;TENG Xin;LIANG Xing-tang;YIN Yan-zhen(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;School of Petroleum and Chemical Engineering,Beibu Gulf University,Qinzhou 535011,China)
出处
《应用化工》
CAS
CSCD
北大核心
2023年第2期343-349,共7页
Applied Chemical Industry
基金
国家自然科学基金项目(52060001)
广西自然科学基金项目(2020GXNSFAA159026)。
