Concurrent adsorption and reduction of chromium(Ⅵ)to chromium(Ⅲ)using nitrogen-doped porous carbon adsorbent derived from loofah sponge

作     者：Feng Chen Shihao Guo Yihao Wang Lulu Ma Bing Li Zhimin Song Lei Huang Wen Zhang Feng Chen;Shihao Guo;Yihao Wang;Lulu Ma;Bing Li;Zhimin Song;Lei Huang;Wen Zhang

作者机构：School of Environmental and Biological EngineeringHenan University of EngineeringZhengzhou 451191China School of Environmental Science and EngineeringGuangzhou UniversityGuangzhou 510006China Guangzhou University-Linköping University Research Center on Urban Sustainable DevelopmentGuangzhou UniversityGuangzhou 510006China John A.ReifJr.Department of Civil and Environmental EngineeringNew Jersey Institute of TechnologyNewarkNJ 07102USA 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2022年第16卷第5期

页      面：27-37页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：funded by the National Natural Science Foundation of China(Grant No.41872169) the Project of Education Department of Henan Province(No.21A610002) the Innovation and entrepreneurship training plan for college students of Henan Province in 2020(No.S202011517004) 

主　　题：Chromium(Ⅵ) Nitrogen-doped porous carbon Adsorption Reduction Loofah sponge 

摘      要：To develop highly effective adsorbents for chromium removal,a nitrogen-doped biomass-derived carbon(NHPC)was synthesized via direct carbonation of loofah sponge followed by alkali activation and doping *** possessed a hierarchical micro-/mesoporous lamellar structure with nitrogen-containing functional groups(1.33 at%),specific surface area(1792.47 m2/g),and pore volume(1.18 cm^(3)/g).NHPC exhibited a higher Cr(Ⅵ)adsorption affinity than the HPC(without nitrogen doping)or the pristine loofah sponge carbon(LSC)*** influence of process parameters,including pH,dosage,time,temperature,and Cr(Ⅵ)concentration,on Cr(Ⅵ)adsorption by NHPC were *** Cr(Ⅵ)adsorption kinetics matched with the pseudo-second-order model(R^(2)≥0.9983).The Cr(Ⅵ)adsorption isotherm was fitted with the Langmuir isotherm model,which indicated the maximum Cr(Ⅵ)adsorption capacities:227.27,238.10,and 285.71 mg/g at 298K,308K,and 318K,*** model analysis also indicated that adsorption of Cr(Ⅵ)on NHPC was a spontaneous,endothermal,and entropy-increasing *** Cr(Ⅵ)adsorption process potentially involved mixed reductive and adsorbed ***,computational chemistry calculations revealed that the adsorption energy between NHPC and Cr(VI)(-0.84 eV)was lower than that of HPC(-0.51 eV),suggesting that nitrogen doping could greatly enhance the interaction between NHPC and Cr(VI).