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Removal of lead from aqueous solution by hydroxyapatite/manganese dioxide composite

Lijing DONG,Zhiliang ZHU,Yanling QIU,Jianfu ZHAO

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1,   Pages 28-36 doi: 10.1007/s11783-014-0722-5

Abstract: hydroxyapatite/manganese dioxide (HAp/MnO ), has been developed for the purpose of removing lead ions from aqueousVarious factors that may affect the adsorption efficiency, including solution pH, coexistent substancesUsing this composite adsorbent, solution pH and coexistent calcium or magnesium cations were found toresults indicate that HAp/MnO composite may be an effective adsorbent for the removal of lead ions from aqueous

Keywords： lead     composite materials     manganese dioxide     hydroxyapatite     adsorption    

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Investigation of phosphate adsorption from an aqueous solution using spent fluid catalytic cracking catalyst

Zhen Li, Zhaofu Qiu, Ji Yang, Benteng Ma, Shuguang Lu, Chuanhui Qin

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 6, doi: 10.1007/s11783-018-1082-3

Abstract:

Spent FCC catalyst with lanthanum is proposed as a novel P-removal adsorbent.

The spent FCC catalyst exhibits 99% adsorption efficiency for low P-concentration wastewater (C0 <5.0 mg/L).

High affinity, endothermic reaction and fast sorption kinetics are achieved.

The phosphate is adsorbed in the form of LaPO4 and KH2PO4.

Keywords： Spent FCC catalyst     Phosphate removal     Adsorption     Lanthanum    

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Removal of rhodamine B from aqueous solution by BiPO

Lei LI, Jian XU, Changsheng GUO, Yuan ZHANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 3,   Pages 382-387 doi: 10.1007/s11783-013-0504-5

Abstract: Hexahedron-like BiPO microcrystals were sucessfully synthesized via a template-free hydrothermal method. The resulting samples were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and UV–vis spectroscopy. The BiPO samples were of pure monoclinic phase, and the initial amount of during synthesis did not show obvious effect on the phase properties of the materials. The hexahedron-like BiPO microcrystal had explicitly cut edges, and its thickness was about 1 μm. The photocatalytic performance of the BiPO catalysts was evaluated by photodegradation of RhB under UV light irradiation with commerial Degussa P25 TiO as reference. Compared with P25, the BiPO catalysts displayed higher photocatalytic activity, with 98.7% of RhB degraded during 60-min experiment. Cost evaluation analysis was adopted to describe the energy consumption of the degradation process, and the results suggested the potential application of this material in the field of dye-contaminated wastewater treatment or environmental matrices remediation.

Keywords： BiPO4     photocatalysis     Rhodamine B     cost evaluation    

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VALORIZATION OF BIOGAS THROUGH SIMULTANEOUS CO AND HS REMOVAL BY RENEWABLE AQUEOUS AMMONIA SOLUTION IN

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 3,   Pages 468-478 doi: 10.15302/J-FASE-2022473

Abstract:

● Simultaneous H2S and CO2 removal from biogas is studied.

Keywords： biomethane     biogas purification     CO2 removal     H2S removal     membrane absorption    

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Removal of sulfadiazine from aqueous solution on kaolinite

Jian XU, Yan HE, Yuan ZHANG, Changsheng GUO, Lei LI, Yuqiu WANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 6,   Pages 836-843 doi: 10.1007/s11783-013-0513-4

Abstract: The adsorption of sulfadiazine onto kaolinite clay as an alternative adsorbent was examined in aqueoussolution.Decreasing ionic strength in the solution was favorable for adsorption, and the addition of cationic

Keywords： adsorption     kaolinite     sulfadiazine     kinetics    

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Rheological behavior of PMVE-MA aqueous solution with metallic cations

Xiaoping DONG, Li LI, Jun XU, Xuhong GUO

Frontiers of Chemical Science and Engineering 2011, Volume 5, Issue 1,   Pages 126-130 doi: 10.1007/s11705-010-0548-z

Abstract: The rheological properties of aqueous solutions of poly(methyl vinyl ether-co-maleic anhydride) (PMVE-MA

Keywords： poly(methyl vinyl ether-co-maleic anhydride)     shear-thickening     gel point     rheology    

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Experimental study on oxidative decomposition of nitrobenzene in aqueous solution by honeycomb ceramic-catalyzed

ZHAO Lei, MA Jun, LIU Zhengqian, YANG Yixin, SUN Zhizhong

Frontiers of Environmental Science & Engineering 2008, Volume 2, Issue 1,   Pages 44-50 doi: 10.1007/s11783-008-0012-1

Abstract: The ozonation of nitrobenzene in aqueous solution was carried out in a semi-batch reactor to investigateThe degradation rates all increased greatly with the increase of temperature and pH of the solution inBut, when the pH of the solution increased to 9.50, the advantage of the honeycomb ceramic-catalyzedand honeycomb ceramic-catalyzed ozonation, nitrobenzene was primarily oxidized by OH free radical in aqueoussolution.
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Enhanced hydrogen production from aqueous methanol solution using TiO

Paramasivan GOMATHISANKAR,Tomoko NODA,Hideyuki KATSUMATA,Tohru SUZUKI,Satoshi KANECO

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 2,   Pages 197-202 doi: 10.1007/s11705-014-1417-y

Abstract: The photocatalytic hydrogen production from aqueous methanol solution using titanium dioxide (TiO ) was

Keywords： photocatalytic hydrogen generation     methanol     copper particles     TiO2     metal-semiconductor interface    

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Removal of Cu(II) ions from aqueous solution by activated carbon impregnated with humic acid

LIU Hanchao,FENG Suping,ZHANG Nannan,DU Xiaolin,LIU Yongli

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 3,   Pages 329-336 doi: 10.1007/s11783-013-0553-9

Abstract: Humic acid (HA) was impregnated onto powdered activated carbon to improve its Cu(II) adsorption capability. The optimum pH value for Cu(II) removal was 6. The maximum adsorption capacity of HA-impregnated activated carbon was up to 5.98 mg·g , which is five times the capacity of virgin activated carbon. The adsorption processes were rapid and accompanied by changes in pH. In using a linear method, it was determined that the equilibrium experimental data were better represented by the Langmuir isotherm than by the Freundlich isotherm. Surface charges and surface functional groups were studied through zeta potential and FTIR measurements to explain the mechanism behind the humic-acid modification that enhanced the Cu(II) adsorption capacity of activated carbon.

Keywords： adsorption     humic acid     activated carbon     heavy metal ions    

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Effects of baffles on separation of aqueous ethanol solution with hollow fibers

Zhihong YANG, Guoliang ZHANG, Lan LIN, Danping REN, Qin MENG, Hongzi ZHANG

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 1,   Pages 68-72 doi: 10.1007/s11705-009-0130-8

Abstract: The effects of baffles on the operation and mass-transfer characteristics in novel hollow fiber membrane contactor used in distillation were investigated. Hollow fiber membranes, coated with a 7 μm polydimethyl-siloxane, were operated as structural packing in the separation of ethanol-water solutions. The parallel flow mode was chosen for separation due to the stronger driving force of the concentration difference, in which liquid flows through the lumens of the fibers and vapor flows countercurrent-wise outside the fibers. Two baffles were installed on the shell side of the membrane contactors to enhance separation, which had a round shape with a semi-lunar hole. The results show that both baffled and unbaffled membrane contactors gave better, more productive separations than traditional packing in distillation, such as the excellent Sulzer Gauze BX structured packing. The baffled membrane contactors performed better than unbaffled ones, especially at high vapor velocities. The minimal HTU of membrane contactor with baffles could reach as low as 4.5 cm, and almost all the contactors could work well above the limit where flooding normally occurs in conventional cases. Theoretical analysis predicted that baffles helped membrane module to obtain a higher mass-transfer coefficient and a smaller mass-transfer resistance. Finally, theoretical mass-transfer coefficient and experimental value were compared as well as the contribution of each individual mass-transfer coefficients among liquid, gas and membrane.

Keywords： hollow fiber     membrane contactor     baffle     mass-transfer     ethanol-water    

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Solution properties and self-association of multi-blocks like copolymer P(AM/AA) prepared by template

ZHANG Yuxi, WU Feipeng, LI Miaozhen, WANG Erjian

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 1,   Pages 68-71 doi: 10.1007/s11705-007-0014-8

Abstract: like copolymers (TP) of acrylamide (AM) and acrylic acid (AA) prepared by template copolymerization in aqueoussolution were studied.Decreasing the value of pH or adding Ca ion to the copolymer solution will make phase separation occurWith the increase of the pH value of copolymer solution, the changes of the solution viscosity was similar

Keywords： aqueous solution     homopolyacrylic     copolymer solution     significant structure     presence    

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Removal of clofibric acid from aqueous solution by polyethylenimine-modified chitosan beads

Yao NIE,Shubo DENG,Bin WANG,Jun HUANG,Gang YU

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 5,   Pages 675-682 doi: 10.1007/s11783-013-0622-0

Abstract: Polyethylenimine (PEI)-modified chitosan was prepared and used to remove clofibric acid (CA) from aqueoussolution.

Keywords： clofibric acid     PEI-modified chitosan     adsorption capacity     adsorption mechanism     electrostatic interaction    

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Isolation of highly purity cellulose from wheat straw using a modified aqueous biphasic system

Lifeng YAN, Yi ZHAO, Qing GU, Wan LI

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 3,   Pages 282-291 doi: 10.1007/s11705-012-0901-5

Abstract: The dewaxed wheat straw was pretreated with aqueous hydrochloric acid followed by delignification usingan environmentally benign poly(ethyleneglycol)/salt aqueous biphasic system.All the isolated cellulose samples could be directly dissolved in a 6 wt-% NaOH/4 wt-% urea aqueous solutionthrough a precooling-thawing process to form a homogenous solution.The separation process was investigated and the obtained cellulose and its solution were characterized

Keywords： cellulose     straw     separation     aqueous solution    

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Unconventional hydrodynamics of hybrid fluid made of liquid metals and aqueous solution under applied

Xu-Dong ZHANG, Yue SUN, Sen CHEN, Jing LIU

Frontiers in Energy 2018, Volume 12, Issue 2,   Pages 276-296 doi: 10.1007/s11708-018-0545-3

Abstract: The hydrodynamic characteristics of hybrid fluid made of liquid metal/aqueous solution are elementaryBesides, the liquid metal immersed in the solution can move and deform when administrated with non-contactOwing to its remarkable capability in flow and deformation, liquid metal immersed in the solution is

Keywords： liquid metal     hybrid fluid     hydrodynamics     surface tension     applied fields     self-actuation    

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Biosorption of Cr(III) from aqueous solution by freeze-dried activated sludge: Equilibrium, kinetic and

Qian YAO, Hua ZHANG, Jun WU, Liming SHAO, Pinjing HE,

Frontiers of Environmental Science & Engineering 2010, Volume 4, Issue 3,   Pages 286-294 doi: 10.1007/s11783-010-0025-4

Abstract: Batch biosorption experiments were conducted to remove Cr(III) from aqueous solutions using activated

Keywords： activated sludge     biosorption     chromium     film diffusion     kinetics     thermodynamics    

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Title Author Date Type Operation

Removal of lead from aqueous solution by hydroxyapatite/manganese dioxide composite

Lijing DONG,Zhiliang ZHU,Yanling QIU,Jianfu ZHAO

Journal Article

Investigation of phosphate adsorption from an aqueous solution using spent fluid catalytic cracking catalyst

Zhen Li, Zhaofu Qiu, Ji Yang, Benteng Ma, Shuguang Lu, Chuanhui Qin

Journal Article

Removal of rhodamine B from aqueous solution by BiPO

Lei LI, Jian XU, Changsheng GUO, Yuan ZHANG

Journal Article

VALORIZATION OF BIOGAS THROUGH SIMULTANEOUS CO AND HS REMOVAL BY RENEWABLE AQUEOUS AMMONIA SOLUTION IN

Journal Article

Removal of sulfadiazine from aqueous solution on kaolinite

Jian XU, Yan HE, Yuan ZHANG, Changsheng GUO, Lei LI, Yuqiu WANG

Journal Article

Rheological behavior of PMVE-MA aqueous solution with metallic cations

Xiaoping DONG, Li LI, Jun XU, Xuhong GUO

Journal Article

Experimental study on oxidative decomposition of nitrobenzene in aqueous solution by honeycomb ceramic-catalyzed

ZHAO Lei, MA Jun, LIU Zhengqian, YANG Yixin, SUN Zhizhong

Journal Article

Enhanced hydrogen production from aqueous methanol solution using TiO

Paramasivan GOMATHISANKAR,Tomoko NODA,Hideyuki KATSUMATA,Tohru SUZUKI,Satoshi KANECO

Journal Article

Removal of Cu(II) ions from aqueous solution by activated carbon impregnated with humic acid

LIU Hanchao,FENG Suping,ZHANG Nannan,DU Xiaolin,LIU Yongli

Journal Article

Effects of baffles on separation of aqueous ethanol solution with hollow fibers

Zhihong YANG, Guoliang ZHANG, Lan LIN, Danping REN, Qin MENG, Hongzi ZHANG

Journal Article

Solution properties and self-association of multi-blocks like copolymer P(AM/AA) prepared by template

ZHANG Yuxi, WU Feipeng, LI Miaozhen, WANG Erjian

Journal Article

Removal of clofibric acid from aqueous solution by polyethylenimine-modified chitosan beads

Yao NIE,Shubo DENG,Bin WANG,Jun HUANG,Gang YU

Journal Article

Isolation of highly purity cellulose from wheat straw using a modified aqueous biphasic system

Lifeng YAN, Yi ZHAO, Qing GU, Wan LI

Journal Article

Unconventional hydrodynamics of hybrid fluid made of liquid metals and aqueous solution under applied

Xu-Dong ZHANG, Yue SUN, Sen CHEN, Jing LIU

Journal Article

Biosorption of Cr(III) from aqueous solution by freeze-dried activated sludge: Equilibrium, kinetic and

Qian YAO, Hua ZHANG, Jun WU, Liming SHAO, Pinjing HE,

Journal Article