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Magnetic KIT-6 nano-composite and its amino derivatives as convenient adsorbent for U(VI) sequestration

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 2037-2049 doi: 10.1007/s11705-023-2358-0

Abstract: The prepared materials exhibited excellent properties for U(VI) ions removal from aqueous solutions underThe experimental data show that the U(VI) adsorption features fast adsorption kinetics, high adsorptioncapacity and ideal selectivity toward U(VI).The adsorption process is of spontaneous and endothermic nature and ionic strength independence, andVI) while exerting its role as a recovery adsorbent.

Keywords： magnetic nanoparticle     3D mesoporous silica     amino functionalization     adsorption of U(VI)     acid resistance    

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Concurrent adsorption and reduction of chromium(VI) to chromium(III) using nitrogen-doped porous carbon

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 5, doi: 10.1007/s11783-021-1491-6

Abstract:

• A high-efficiency N-doped porous carbon adsorbent for Cr(VI) was synthesized

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

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Dual-functional sites for synergistic adsorption of Cr(VI) and Sb(V) by polyaniline-TiO hydrate: Adsorption

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1526-7

Abstract: OH)n(4–n)+ exhibited excellent adsorption

Keywords： Polyaniline/TiO2     Chromium     Antimony     Adsorption     Desorption     Mechanism    

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Effects of phosphorus concentration on Cr(VI) sorption onto phosphorus-rich sludge biochar

DING Wenchuan,PENG Wenlong,ZENG Xiaolan,TIAN Xiumei

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 3,   Pages 379-385 doi: 10.1007/s11783-013-0606-0

Abstract: To investigate effects of phosphorus content on Cr(VI) sorption onto phosphorus-rich biochar, sewageThe adsorption kinetics of phosphorus-rich biochar could be described by the pseudo-second-order modelindicated that chemical functional groups hydroxyl and methyl on surface of biochar were involved in Cr(VIIt also could react with Cr(III) on the biochar surface that impacted on capacity of Cr(VI) removal from

Keywords： phosphorus     biochar     sewage sludge     hexavalent chromium     adsorption    

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Efficient removal of Cr(VI) and Pb(II) from aqueous solution by magnetic nitrogen-doped carbon

Wanyue Liu, Xiaoqin Liu, Jinming Chang, Feng Jiang, Shishi Pang, Hejun Gao, Yunwen Liao, Sheng Yu

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1185-1196 doi: 10.1007/s11705-020-2032-8

Abstract: The capacity of MNC to adsorb Cr(VI) and Pb(II) was evaluated.The effects of the initial pH, dosage, concentration and temperature on the adsorption capacity of MNCThe maximum Cr(VI)-adsorption capacity and maximum Pb(II) adsorption capacity of MNC could reach 456.63The pseudo-second-order model was used to describe the adsorption kinetics of MNC, and the FreundlichThe adsorption process was affected by the electrostatic force, the reducing reaction, pores and chelation

Keywords： magnetic     nitrogen-doped carbon     adsorption     Cr(VI)     Pb(II)    

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Biosorption of Cr(VI) by carbonized

Jinfa CHEN,Ping YANG,Dagang SONG,Sha YANG,Li ZHOU,Lei HAN,Bo LAI

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 6,   Pages 960-966 doi: 10.1007/s11783-013-0612-2

Abstract: The biosorbent was used for Cr(VI) removal.Cr(VI) removal efficiency is found to be maximum (98%) at pH= 1.Langmuir and Freundlich adsorption isotherms were applicable to the adsorption process and their constantsThe maximum adsorption capacities for Cr(VI) ranged from 46.23 to 55.19 mg·g for temperature between) adsorption.

Keywords： Eupatorium adenophorum     buckwheat straw     adsorption     Cr(VI)     thermodynamics    

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Selective targeted adsorption and inactivation of antibiotic-resistant bacteria by Cr-loaded mixed metal

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 6, doi: 10.1007/s11783-021-1502-7

Abstract:

• LDHs and MMOs was synthesized by ultrasound-assisted one-step co-precipitation.

Keywords： Heavy metal adsorption     Magnetic hydrotalcite     ARBs removal     Cr(VI)-MMOs combined antibacterial activity    

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Crosslinking acrylamide with EDTA-intercalated layered double hydroxide for enhanced recovery of Cr(VI

Jing Li, Haiqin Yu, Xue Zhang, Rixin Zhu, Liangguo Yan

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 3, doi: 10.1007/s11783-020-1229-x

Abstract: Elimination of Cr(VI) was promoted by coexisting CR.Adsorption process of CR was less influenced by the presence of Cr(VI).)) in single and binary adsorption systems.The adsorption process on LDH-EDTA-AM for CR and Cr(VI) achieved equilibrium quickly, and the removalIn the Cr(VI) adsorption process, reduction also took place.

Keywords： Chromate     Dye adsorption     Simultaneous removal     Cross-linking method     Amino functionalization    

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A ternary mechanism for the facilitated transfer of metal ions onto metal–organic frameworks: implications for the ‘‘versatility’’ of these materials as solid sorbents

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.Analogous MIL-100s (Al, Fe, Cr) were prepared and studied for their ability to sequestrate U(VI) fromtechnique combined with energy-dispersive X-ray spectroscopy and zeta potential measurement reveal that U(VI) uptake in the three metal–organic frameworks involves different mechanisms.For MIL-100(Cr), however, the U(VI) uptake is attributed to electrostatic attraction.

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

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Preparation and characterization of

Chunhua XU, Dandan CHENG, Baoyu GAO, Zhilei YIN, Qinyan YUE, Xian ZHAO

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 4,   Pages 455-462 doi: 10.1007/s11783-010-0275-1

Abstract: Batch adsorption experiments were conducted to explore the adsorption of Cr(VI) in aqueous solutionspH, initial Cr(VI) ion concentration, contact time and temperature.The uptake of Cr(VI) was very rapid and 44.3%, 51.6%, 58.9% of the adsorption happened during the firstand 0.076 mg Cr(VI) per gram of the adsorbent, respectively.The negative value of and the positive value of showed that the adsorption of Cr(VI) in aqueous solutions

Keywords： β-FeOOH-coated sand     Cr(VI)     adsorption     isotherm     kinetics    

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The biosorption of Cr(VI) ions by dried biomass obtained from a chromium-resistant bacterium

Paul Fabrice NGUEMA,Zejiao LUO,Jingjing LIAN

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 4,   Pages 454-464 doi: 10.1007/s11705-014-1456-4

Abstract: However, there is little data on the biosorption mechanism of Cr(VI) by dried biomass.So the bio-removal of Cr(VI) ions from aqueous solutions was investigated using dried biomass from aThe biosorption process was found to be highly pH dependent and the optimum pH for the adsorption ofCr(VI) was 2.0±0.3 at 30±2 °C.External mass transfer was found to be the rate-determining step for the adsorption process.

Keywords： Cr(VI)     biomass     Bacillus cereus Pf-1     biosorption capacity     biosorbents    

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Decontamination of Cr(VI) facilitated formation of persistent free radicals on rice husk derived biochar

Kaikai Zhang, Peng Sun, Yanrong Zhang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 2, doi: 10.1007/s11783-019-1106-7

Abstract:

PFRs were produced on biochar during Cr(VI) decontamination.listitem>

PFRs formation on biochar was owing to the oxidization of phenolic-OH by Cr(VIlistitem>

Biochar charred at high temperature possessed great performance to Cr(VI

Keywords： Biochar     Persistent free radicals     Phenolic hydroxyl groups     Cr(VI) reduction    

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Hyperbranched magnetic polymer: highly efficient removal of Cr(VI) and application in electroplating

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1568-1580 doi: 10.1007/s11705-023-2303-2

Abstract: Under optimal adsorption conditions, the maximum adsorption capacity of TTCA/THT@Fe3OFor actual wastewater containing Cr(VI), the Cr(VI) concentration was reduced from 25.8 to 0.4 mg∙Ladsorption performance of Cr(VI) on TTCA/THT@Fe3O4 wasincrease the contact area with Cr(VI), maximizing adsorption.The synergistic effect of adsorption and reduction enhances the adsorption performance of TTCA/THT@Fe

Keywords： magnetic polymer     chromium removal     hydrogen bonding     recyclability     actual wastewater    

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Enhancement of extracellular Cr(VI) reduction for anammox recovery using hydrazine: performance, pathways

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1715-z

Abstract: ItemContent>

● N2H4 addition enhanced and recovered anammox performance under Cr(VI

Keywords： Extracellular Cr(VI) reduction     Electron transfer     Anammox     Hydrazine     Cr(VI) inhibition    

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A building-based data capture and data mining technique for air quality assessment

Ni SHENG, U Wa TANG

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 4,   Pages 543-551 doi: 10.1007/s11783-011-0369-4

Abstract: Recently, a building-based air quality model system which can predict air quality in front of individual buildings along both sides of a road has been developed. Using the Macau Peninsula as a case study, this paper shows the advantages of building-based model system in data capture and data mining. Compared with the traditional grid-based model systems with input/output spatial resolutions of 1–2 km, the building-based approach can extract the street configuration and traffic data building by building and therefore, can capture the complex spatial variation of traffic emission, urban geometry, and air pollution. The non-homogeneous distribution of air pollution in the Macau Peninsula was modeled in a high-spatial resolution of 319 receptors·km . The spatial relationship among air quality, traffic flow, and urban geometry in the historic urban area is investigated. The study shows that the building-based approach may open an innovative methodology in data mining of urban spatial data for environmental assessment. The results are particularly useful to urban planners when they need to consider the influences of urban form on street environment.

Keywords： traffic air pollution     spatial distribution     high resolution     geographic information system    

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Title Author Date Type Operation

Magnetic KIT-6 nano-composite and its amino derivatives as convenient adsorbent for U(VI) sequestration

Journal Article

Concurrent adsorption and reduction of chromium(VI) to chromium(III) using nitrogen-doped porous carbon

Journal Article

Dual-functional sites for synergistic adsorption of Cr(VI) and Sb(V) by polyaniline-TiO hydrate: Adsorption

Journal Article

Effects of phosphorus concentration on Cr(VI) sorption onto phosphorus-rich sludge biochar

DING Wenchuan,PENG Wenlong,ZENG Xiaolan,TIAN Xiumei

Journal Article

Efficient removal of Cr(VI) and Pb(II) from aqueous solution by magnetic nitrogen-doped carbon

Wanyue Liu, Xiaoqin Liu, Jinming Chang, Feng Jiang, Shishi Pang, Hejun Gao, Yunwen Liao, Sheng Yu

Journal Article

Biosorption of Cr(VI) by carbonized

Jinfa CHEN,Ping YANG,Dagang SONG,Sha YANG,Li ZHOU,Lei HAN,Bo LAI

Journal Article

Selective targeted adsorption and inactivation of antibiotic-resistant bacteria by Cr-loaded mixed metal

Journal Article

Crosslinking acrylamide with EDTA-intercalated layered double hydroxide for enhanced recovery of Cr(VI

Jing Li, Haiqin Yu, Xue Zhang, Rixin Zhu, Liangguo Yan

Journal Article

A ternary mechanism for the facilitated transfer of metal ions onto metal–organic frameworks: implications for the ‘‘versatility’’ of these materials as solid sorbents

Journal Article

Preparation and characterization of

Chunhua XU, Dandan CHENG, Baoyu GAO, Zhilei YIN, Qinyan YUE, Xian ZHAO

Journal Article

The biosorption of Cr(VI) ions by dried biomass obtained from a chromium-resistant bacterium

Paul Fabrice NGUEMA,Zejiao LUO,Jingjing LIAN

Journal Article

Decontamination of Cr(VI) facilitated formation of persistent free radicals on rice husk derived biochar

Kaikai Zhang, Peng Sun, Yanrong Zhang

Journal Article

Hyperbranched magnetic polymer: highly efficient removal of Cr(VI) and application in electroplating

Journal Article

Enhancement of extracellular Cr(VI) reduction for anammox recovery using hydrazine: performance, pathways

Journal Article

A building-based data capture and data mining technique for air quality assessment

Ni SHENG, U Wa TANG

Journal Article