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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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A ternary mechanism for the facilitated transfer of metal ions onto metal–organic frameworks: implications

Frontiers of Chemical Science and Engineering   Pages 1632-1642 doi: 10.1007/s11705-022-2187-6

Abstract: Herein, a ternary mechanism for U(VI) uptake in metal–organic frameworks was reported.Specifically, hydrated uranyl ions form outer-sphere complexes in the surface of MIL-100s (Al, Fe) byexchanging with hydrogen ions of terminal hydroxyl groups (Al-OH2, Fe-OH2), and/or, hydrated uranyl ions are bound directly to Al(III) center in MIL-100(Al) through a strong inner-sphereThe present study suggests that changing metal center of metal–organic frameworks and sorption conditions

Keywords： U(VI)     metal–organic frameworks     adsorption mechanism     metal node    

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minimized fluorescent chemosensor array utilizing carboxylate-attached polythiophenes on a chip for metalions detection

Yui Sasaki, Xiaojun Lyu, Zhoujie Zhang, Tsuyoshi Minami

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 1,   Pages 72-80 doi: 10.1007/s11705-021-2037-y

Abstract: two types of carboxylate-functionalized polythiophene derivatives for the detection of eight types of metalions.Upon recognition of the metal ions, the polythiophenes exhibited changes in their fluorescence intensityConsequently, the metal ions in aqueous media were successfully discriminated qualitatively and quantitatively

Keywords： metal ions     polythiophene     chemosensor array     fluorescence     pattern recognition    

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Effects of metal ions on the morphology of calcium sulfate hemihydrate whiskers by hydrothermal method

Tianjie Liu, Hao Fan, Yanxia Xu, Xingfu Song, Jianguo Yu

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 4,   Pages 545-553 doi: 10.1007/s11705-017-1665-8

Abstract: The effects of Na , Mg , Al and Fe ion concentrations on the crystal morphology of calcium sulfate hemihydrate whiskers formed via a hydrothermal method have been studied. In the presence of Al concentrations higher than 1×10 mol/L the whiskers were significantly shorter and thicker and the presence of Mg and Fe resulted in shorter whiskers. The presence of Na did not affect the morphology of the whiskers. Through elemental analysis, it was determined that Mg and Al were selectively adsorbed on the surfaces of the crystals, whereas Fe underwent a hydrolysis reaction to form a brown precipitate which decreased the ion concentration in the solution. These results indicate that in raw materials used for the industrial preparation of calcium sulfate whiskers, Al and Fe should be removed and the Mg concentration should be less than 8 × 10 mol/L in order to obtain pure whiskers with high aspect ratios.

Keywords： metal ions     morphology     calcium sulfate hemihydrate whiskers     hydrothermal method     selective adsorption    

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Boron and nitrogen co-doped porous carbon derived from sodium alginate enhanced capacitive deionization for water purification

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 2014-2024 doi: 10.1007/s11705-023-2346-4

Abstract: /sup>·g‒1) and high specific capacitance (190.7 F·g‒1) for adsorption of salt ionsand heavy metal ions.This work can pave the way to design low-cost porous carbon with high-performances for removal of salt ionsand heavy metal ions.

Keywords： capacitance deionization     porous carbon     B/N co-doping     heavy metal ions     water purification    

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An AuNPs/Mesoporous NiO/Nickel Foam Nanocomposite as a Miniaturized Electrode for Heavy Metal Detection Article

Boyuan Xue, Qian Yang, Kaidong Xia, Zhihong Li, George Y. Chen, Dayi Zhang, Xiaohong Zhou

Engineering 2023, Volume 27, Issue 8,   Pages 199-208 doi: 10.1016/j.eng.2022.06.005

Abstract:

Heavy metals, notably Pb2+ and Cu2+, are some of the most persistent contaminantsAs a result, the heavy metals Pb2+ (0.020 mg·L−1 detection limit,Furthermore, other heavy metal ions and common interfering ions found in groundwater showed negligiblepower consumption, and ability to remotely operate our electrode pave the way for onsite detection of heavy

Keywords： AuNPs     Mesoporous NiO     Miniaturized electrode     Heavy metal ions     Groundwater     Square wave voltammetry    

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Removal of copper ions from aqueous solution by adsorption using LABORATORIES-modified bentonite (organo-bentonite

Sandy, Velycia MARAMIS, Alfin KURNIAWAN, Aning AYUCITRA, Jaka SUNARSO, Suryadi ISMADJI

Frontiers of Chemical Science and Engineering 2012, Volume 6, Issue 1,   Pages 58-66 doi: 10.1007/s11705-011-1160-6

Abstract: Equilibrium, kinetic and thermodynamic aspects of the adsorption of copper ions from an aqueous solutionThe Sips model had the best fit for the adsorption of copper ions onto organo-bentonite.Thermodynamically, the adsorption of copper ions occurs via chemisorption and the process is endothermic

Keywords： heavy metal     copper     adsorption     organo-bentonite     temperature dependent    

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Fluoride ions adsorption from water by CaCO enhanced Mn–Fe mixed metal oxides

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 2,   Pages 236-248 doi: 10.1007/s11705-022-2193-8

Abstract: Novel CaCO3-enhanced Mn–Fe mixed metal oxides (CMFC) were successfully prepared for the firstThese oxides were then employed as an adsorbent for adsorptive removal of excess fluoride ions.

Keywords： mesoporous materials     metal oxides     fluoride ion     adsorption mechanism    

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Recent progress in electrospun nanofibers and their applications in heavy metal wastewater treatment

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 3,   Pages 249-275 doi: 10.1007/s11705-022-2245-0

Abstract: adsorbents with a simple preparation process and large capacity for removing highly toxic and nondegradable heavyThese membranes show remarkable application potential in the field of heavy metal wastewater treatmentmetal wastewater treatment are introduced, and their advantages and future development are summarizedstructure of the nanofiber membrane, the recent progresses of electrospun functional membranes for heavymetal removal are reviewed, and the advantages of different structures for applications are concluded

Keywords： electrospinning     heavy metal     adsorption     nanostructure     wastewater    

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Strategies to manage the risk of heavy metal(loid) contamination in agricultural soils

Fang-Jie ZHAO

Frontiers of Agricultural Science and Engineering 2020, Volume 7, Issue 3,   Pages 333-338 doi: 10.15302/J-FASE-2020335

Abstract:

Soil contamination with heavy metal(loid)s threatens soil ecological functions, water quality andLong-term monitoring of anthropogenic additions and accumulation of heavy metal(loid)s in agriculturalMass-balance models should be constructed to evaluate future trends of metal(loid)s in agricultural soils

Keywords： arsenic     cadmium     food safety     heavy metals     soil contamination    

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Sulfur mediated heavy metal biogeochemical cycles in coastal wetlands: From sediments, rhizosphere to

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1523-x

Abstract:

• In sediments, the transformation of sulfides may lead to the release of heavy

Keywords： Coastal wetland     Heavy metal     Sulfur     Biogeochemical cycle    

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Temporal variation of heavy metal pollution in urban stormwater runoff

Wen LI, Zhenyao SHEN, Tian TIAN, Ruimin LIU, Jiali QIU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5,   Pages 692-700 doi: 10.1007/s11783-012-0444-5

Abstract: The degree of heavy metal contamination was related to the type of underlying surfaces.Additionally, the concentration of dissolved heavy metals peaked shortly after the runoff began and thenThe relative strength of the first flush for dissolved heavy metals was Fe, Mn>Cu, Zn>Pb.

Keywords： urban stormwater     heavy metal pollution     temporal variation     event mean concentration     first flush effect    

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Reuse of heavy metal-accumulating

Dongdong MA,Hongwen GAO

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 6,   Pages 952-959 doi: 10.1007/s11783-013-0619-8

Abstract: A reasonable disposal of metal hyperaccumulators is always a major issue in waste reuse and resource-savingThe heavy metal-accumulating (L.) was investigated where heavy metals were desorbed by a facile acid-treatmentThe plant residue was used to adsorb heavy metals ions.metal-imprinting cavities existed simultaneously during the adsorption.The method offers a new disposal approach for heavy metal hyperaccumulator.

Keywords： heavy metals     Cynondon dactylon     acid-treatment     adsorption     recycling    

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Interactions between metal ions and the biopolymer in activated sludge: quantification and effects of

Yun Zhou, Siqing Xia, Binh T. Nguyen, Min Long, Jiao Zhang, Zhiqiang Zhang

Frontiers of Environmental Science & Engineering 2017, Volume 11, Issue 1, doi: 10.1007/s11783-017-0898-6

Abstract: Removal mechanism of metal ions by activated sludge system was further disclosed.Accordingly, the aromatic protein (peak B) plays the key role in the interactions between metal ions

Keywords： Metal ions     Biopolymer     Activated sludge     Three-dimensional excitation emission matrix (3D-EEM)     Fluorescence    

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Research progress of micellar-enhanced ultrafiltration for treatment of wastewater containing heavy metalions

Yao Qingxu,Jia Mingchun,Wang Xiaowei

Strategic Study of CAE 2014, Volume 16, Issue 7,   Pages 95-99

Abstract: applicable to purifying wastewater,especially in dealing with the effluents containing low levels of metalions.

Keywords： micellar enhanced ultrafiltration     surfactant     critical micellar concentration    

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Title Author Date Type Operation

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

A ternary mechanism for the facilitated transfer of metal ions onto metal–organic frameworks: implications

Journal Article

minimized fluorescent chemosensor array utilizing carboxylate-attached polythiophenes on a chip for metalions detection

Yui Sasaki, Xiaojun Lyu, Zhoujie Zhang, Tsuyoshi Minami

Journal Article

Effects of metal ions on the morphology of calcium sulfate hemihydrate whiskers by hydrothermal method

Tianjie Liu, Hao Fan, Yanxia Xu, Xingfu Song, Jianguo Yu

Journal Article

Boron and nitrogen co-doped porous carbon derived from sodium alginate enhanced capacitive deionization for water purification

Journal Article

An AuNPs/Mesoporous NiO/Nickel Foam Nanocomposite as a Miniaturized Electrode for Heavy Metal Detection

Boyuan Xue, Qian Yang, Kaidong Xia, Zhihong Li, George Y. Chen, Dayi Zhang, Xiaohong Zhou

Journal Article

Removal of copper ions from aqueous solution by adsorption using LABORATORIES-modified bentonite (organo-bentonite

Sandy, Velycia MARAMIS, Alfin KURNIAWAN, Aning AYUCITRA, Jaka SUNARSO, Suryadi ISMADJI

Journal Article

Fluoride ions adsorption from water by CaCO enhanced Mn–Fe mixed metal oxides

Journal Article

Recent progress in electrospun nanofibers and their applications in heavy metal wastewater treatment

Journal Article

Strategies to manage the risk of heavy metal(loid) contamination in agricultural soils

Fang-Jie ZHAO

Journal Article

Sulfur mediated heavy metal biogeochemical cycles in coastal wetlands: From sediments, rhizosphere to

Journal Article

Temporal variation of heavy metal pollution in urban stormwater runoff

Wen LI, Zhenyao SHEN, Tian TIAN, Ruimin LIU, Jiali QIU

Journal Article

Reuse of heavy metal-accumulating

Dongdong MA,Hongwen GAO

Journal Article

Interactions between metal ions and the biopolymer in activated sludge: quantification and effects of

Yun Zhou, Siqing Xia, Binh T. Nguyen, Min Long, Jiao Zhang, Zhiqiang Zhang

Journal Article

Research progress of micellar-enhanced ultrafiltration for treatment of wastewater containing heavy metalions

Yao Qingxu,Jia Mingchun,Wang Xiaowei

Journal Article