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Journal of Environmental Sciences 2012年第6期24卷 1133-1141页

作者： Muleja Anga Adolph Yangkou Mbianda Xavier Pillay Kriveshini Krause Rui Department of Chemical Technology University of JohannesburgDoornfontein Campus P.O Box 17011JohannesburgSouth Africa

Synthesised triphenylphosphine-linked multiwalled carbon nanotubes （Tpp-MWCNTs） were used to study the adsorption of nickel in aqueous solutions and their adsorption capabilities were compared with purified MWCNTs.The adsorption capacity increased with an increase in pH for all adsorbents.The adsorption equilibrium was reached in 40 and 30 min for purified MWCNTs and Tpp-MWCNTs,respectively.Both Freundlich and Langmuir isotherms used to investigate the adsorption process fitted the experimental data well with the correlation coefficient R 2 close to 1 for all adsorbents.On the other hand,the experimental data fitted well with a pseudo secondorder model.The speciation of nickel also influenced the adsorption on the purified and Tpp-MWCNTs.The adsorbents used in this study showed superior adsorption capacity when compared to other adsorbents reported in the literature.

关键词： phosphine functionalised multiwalled carbon nanotubes adsorbent XPS remediation nickel

Novel Fe/glass composite adsorbent for As(V) removal

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Journal of Environmental Sciences 2009年第4期21卷 434-439页

作者： WANG Ying ZHU Kongjun WANG Fen YANAGISAWA Kazumichi College of Materials Science and Engineering Shaanxi University of Science and Technology Shaanxi 710021 China The Aeronautical Key Laboratory for Smart Materials and Structures Nanjing University of Aeronautics and Astronautics Nanjing 210016 China Research Laboratory of Hydrothermal Chemistry Kochi University Kochi 780-8520 Japan

An effective adsorbent for arsenic removal was synthesized by hydrothermal treatment of waste glass powder （GP）, followed by loading Fe（Ⅲ） oxyhydroxide onto the surface of waste glass powder. The =Si-O-H group was formed on the surface of GP and the specific surface area of GP powder was slightly increased after hydrothermal treatment. FeOOH was loaded onto the surface of hydrothermally treated waste glass powder （HGP） by the hydrolysis of FeC13. The formation conditions of FeOOH were also investigated. The ability of this new adsorbent for arsenic （As（V）） removal was evaluated. The results indicated that the highest removal efficiency was about 97% for 1 mg/L As（V） solution at pH 6 and keeping time 2 h.

关键词： arsenic removal adsorbent iron oxide hydrothermal treatment

A fully bio-sourced adsorbent of heavy metals in water fabricated by immobilization of quinine on cellulose paper

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Journal of Environmental Sciences 2019年第10期31卷 174-183页

作者： Ehu C.Aka Medy C.Nongbe Tchirioua Ekou Lynda Ekou Vincent Coeffard Francois-Xavier Felpin Universite de Nantes CNRS UMR 6230CEISAM2 rue de la Houssinière44322 Nantes Cedex 3France Universite Nangui Abrogoua Laboratoire de Thermodynamique et de Physico-Chimie du Milieu02 BP 801 Abidjan 02Cote d'lvoire

The fabrication of a fully bio-sourced adsorbent of Cd(Ⅱ)by covalent immobilization of quinine on cellulose paper is described.The double bond of commercially available quinine was converted to a terminal alkyne function which was reacted with cellulose paper,chemically modified with azide functions,through a 1,3-dipolar cycloaddition,leading to Cell-Quin.The adsorption efficiency of Cell-Quin was investigated to determine the optimal pH,contact time and dose of adsorbent,ultimately leading to high levels of removal.The mechanism of adsorption of Cell-Quin was deeply rationalized through kinetic experiments and isotherm modeling.We also showed that Cell-Quin could adsorb other heavy metals such as Cu(Ⅱ),Pb(Ⅱ),Ni(Ⅱ)and Zn(Ⅱ).

关键词： Cellulose paper Quinine Heavy metal removal adsorbent

Effect of pyrolysis temperature and hold time on the characteristic parameters of adsorbent derived from sewage sludge

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Journal of Environmental Sciences 2004年第4期16卷 683-686页

作者： ZHAI Yun-bo, WEI Xian-xun, ZENG Guang-ming (Department of Environmental Science and Engineering,Hunan University, Changsha 410082, China. Department of Environmental Science and Engineering Hunan University Changsha 410082

According to the Doehlert’s matrix method, the adsorbent derived from sewage sludge was prepared through chemical activation under controlling the pyrolysis temperature and hold time. The characteristic parameters including the total yield, adsorption of methylene blue, adsorption of iodine, BET surface area, micro-pore volume are 35%—49%, 16.5—38 mg/g, 285—362 mg/g, 185—359 m2/g, and 0.112—0.224 m3/g, respectively. According to the experimental data, the multi-linear regression method was adopted to fit the relations between the characteristic parameters and influential factors. At final, through optimization method, the optimal adsorbent is obtained when using 62 min as hold time and 1105K as pyrolysis temperature. Under the conditions, the adsorbent was produced and compared the characteristic parameters with model forecast value, the coherence is satisfied.

关键词： adsorbent sewage sludge pyrolysis temperature hold time Doehlert’s matrix

Application of diatomite as an effective polysulfides adsorbent for lithium-sulfur batteries

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Journal of Energy Chemistry 2017年第6期26卷 1267-1275页

作者： Zhong Li Nan Zhang Yubao Sun Hanzhong Ke Hansong Cheng Sustainable Energy Laboratory Faculty of Material Science and ChemistryChina University of Geosciences(Wuhan)Wuhan 430074HubeiChina

The lithium–sulfur batteries show the great potential to be the most promising candidate for high energy applications. However, the shuttling of soluble polysulfides deteriorates the battery performance tremendously. To suppress the diffusion of soluble polysulfides, diatomite that has abundant natural three-dimensional ordered pores is incorporated into the cathode to trap polysulfides. The composite cathode material(S-DM-AB for short), including sulfur(S), diatomite(DM), and acetylene black(AB) is prepared by an impregnation method. For comparison, another composite cathode material(S-AB for short) including sulfur and acetylene black is also prepared by the same method. The battery with S-DMAB composite cathode material delivers a discharge capacity of 531.4 m Ah/g after 300 cycles at 2 C with a capacity retention of 51.6% at room temperature. By contrast, the battery with S-AB composite cathode material delivered a capacity of only 196.9 m Ah/g with a much lower capacity retention of 18.6% under the same condition. The addition of diatomite in the cathode is proved to be a cheap and effective way to improve the life time of the lithium sulfur batteries.

关键词： Lithium–sulfur batteries Diatomite adsorbent Cycle performance

Graphene oxide based carbon composite as adsorbent for Hg removal:Preparation, characterization, kinetics and isotherm studies

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Chinese Journal of Chemical Engineering 2017年第9期25卷 1170-1175页

作者： Tayebeh Esfandiyari Navid Nasirizadeh Mohammad Dehghani Mohammad Hassan Ehrampoosh Department of Environmental Health Engineering Shaheed Sadoughi University of Medical Sciences Young Researchers and Elite Club Yazd Branch Islamic Azad University

The presence of Hg in the aqueous media is known to cause severe health issues in both humans and animals.Many technologies and especially adsorbents have been applied for its removal. In this study, a graphene oxide–carbon composite(GO–CC) as a new adsorbent was prepared by sol gel procedure and characterized using field emission scanning electron microscopy, BET and EDX. The effects of different variables including solution p H, contact time, adsorbent dose and GO ratio in adsorbent matrix on the removal capacity of Hg were studied. The isotherm data correlated well with the Langmuir isotherm model. Further analysis recommended that the Hg^(2+) adsorption process is governed by the intra-particle and external mass transfer, in which the film diffusion was the rate restrictive step. The presented composite has maximum absorption capacity, q_(max) of 68.8 mg·g^(-1), which is comparable with carbon based adsorbent reported in the previous publications.

关键词： adsorbent Mercury removal Sol gel Carbon composite

New Models for Evaluating the Adsorption Rate of an adsorbent

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Chinese Journal of Chemical Engineering 1998年第1期6卷 5-15页

作者：姚春才 Chi Tien Department of Chemical Engineering Nanjing Foresty University Department of Chemical Engineering and Materials Science Syracuse University Syracuse

Four models for the rate of adsorption in an adsorbent(slab-like,cylindrical or spherical)arepresented.The parabolic profile(PP)model is obtained by assuming a parabolic intraparticle concentrationprofile.The shell-core(SC)model is based on a shell-core type profile.The modified shell-core(MSC)medel isan extension of the SC model.And the general driving force(GDF)model is a weighted average of the PP andMSC models.Sample calculations show that the GDF model provides the best approximation.

关键词： adsorption rate adsorption adsorbent

Synthesis and characterization of porous 4VP-based adsorbent for Re adsorption as analogue to 99Tc

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Nuclear Science and Techniques 2017年第3期28卷 23-29页

作者： Pu-Yin Wang Jian-Hua Zu Yue-Zhou Wei School of Nuclear Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China

Technetium(^(99)Tc), a major fission product in nuclear reactors, of high yield, long-half-life and high mobility in the environment must be removed in nuclear fuel reprocessing. Considering rhenium(Re) and Tc are both VIIB elements, Re is a good chemical analogue to ^(99)Tc. Herein, we use Re as a substitution of ^(99)Tc to study adsorption and desorption behavior. Porous 4-vinylpyridine–divinylbenzene-based(4VP–DVB) adsorbent containing tertiary amine groups is synthesized by suspension polymerization and characterized by BET, TGA, SEM and laser particle size analyzer. The adsorbent has high adsorption efficiency toward Re(VII) in 0.1 mol/L nitric acid solution, and the adsorption equilibrium can be achieved in 30 min. The adsorption kinetics of Re(VII)follows pseudo-second-order rate equation, the adsorption isotherm matches well with the Langmuir isotherm, and the adsorption capacity of Re(VII) on 4VP–DVB adsorbent is 352.1 mg/g at 298 K. Thermodynamic study reveals that the adsorption process is exothermic. This adsorbent is of separation convenience when a fixed-bed column is used,compared to the batch adsorption treatment.

关键词： Rhenium Technetium Porous adsorbent Adsorption

Enhancement of Photocatalytic and Antibacterial Activities of ZnO：Ag Nanopowders Through the Addition of Bamboo Charcoal： An Efficient Natural adsorbent

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Acta Metallurgica Sinica(English Letters) 2017年第12期30卷 1249-1256页

作者： K. Nithiyadevi K. Ravichandran PG Research and Department of Physics AVVM Sri Pushpam College (Autonomous) Poondi Thanjavur Tamil Nadu 613 503 India Department of Physics Bharathidasan University Constituent College (Women) Orathanadu Tamil Nadu 614 625 India

This research article explains the removal of methylene blue （MB） and malachite green （MG） from aqueous solution using adsorption/photodegradation activity of ZnO：Ag/bamboo charcoal （BC） nanocomposite. In addition, the antibacterial studies of the prepared samples were tested against Staphylococcus aureus （S. aureus） Gram-positive and Escherichia coli （E. coli） Gram-negative bacteria by the well diffusion method. The ZnO：Ag/BC nanocomposite exhibits superior photocatalytic activity compared with ZnO：Ag. Remarkable degradation efficiencies of 93.95% （MB） and 95.75% （MG） were recorded for ZnO：Ag/BC nanocomposite after 45 min. The degradation process follows a pseudo-first-order kinetics. The rate constant of ZnO：Ag/BC nanocomposite is two times greater than that of pristine ZnO nanopowder for the degradation of MB dye, while for MG dye degradation, it is three times. It is found that the ZnO：Ag/BC nanocomposite shows a higher rate of dye removal due to excellent adsorbing properties of bamboo charcoal （BC）. The ZnO：Ag/BC nanocomposite showed better antibacterial properties compared to ZnO：Ag. In this study, the samples were prepared using a simple and low-cost soft chemical route and they were characterized by optical, structural, surface morphological, antibacterial and photocatalytic properties. These characterization studies substantiate the discussions on the photocatalytic and antibacterial activities of the synthesized samples.

关键词： Bamboo charcoal adsorbent ZnO Photocatalysis Antibacterial

Recyclable adsorbent of BiFeO_3/Carbon for purifying industrial dye wastewater via photocatalytic reproducible

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Green Energy & Environment 2019年第1期4卷 66-74页

作者： Shuang Jiao Yiming Zhao Chensha Li Binsong Wang Yang Qu Key Laboratory of Functional Inorganic Materials Chemistry (Heilongjiang University) Ministry of Education School of Chemistry and Materials ScienceInternational Joint Research Center for Catalytic Technology Key Laboratory of Functional Inorganic Materials Chemistry(Heilongjiang University) Ministry of Education School of Chemistry and Materials ScienceInternational Joint Research Center for Catalytic Technology

It is essential to prepare highly-efficiency reproducible adsorbent for purifying industrial dye wastewater. In this work, biscuit with a layered porous structure as a template is applied to prepare a photocatalytic recyclable adsorbent of BiFeO3/Carbon nanocomposites for purifying simulative industrial dye wastewater. It is found that the structure of the prepared BiFeO3/Carbon nanocomposite is related to the natural structure of the biscuit, annealing temperatures and immersing times, demonstrated by XRD, TEM, UV-Vis and adsorptive activities. Kinetics data shows that the adsorption rate of the adsorbent to the dye is rapid and fitted well with the pseudo-second-order model, that more than 80% of dyes can be removed in the beginning 30 min. The adsorption isotherm can be perfectly described by the Langmuir model as well. It can be seen from the adsorption data that the adsorption performance can reach over 90% at pH ? 2–12, which can imply its universal utilization. The prepared BiFeO_3/Carbon nanocomposites have also displayed excellent capacities(over 90% within 30 min) for adsorption of seven different dyes and their mixed one. According to the five times photocatalytic reproducible experiments, it is proved that BiFeO_3/Carbon nanocomposites show the excellent stability and reproduction for purifying simulative industrial dyes, even the sample have been placed for one year. These research results indicate that the adsorbent BiFeO_3/Carbon can be a suitable material used in treating industrial dye wastewater potentially.

关键词： Reproducible adsorbent BiFeO3/Carbon nanocomposites Photocatalysis Purifying industrial dye wastewater Pseudo-second-order model