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Impacts of backwashing on micropollutant removal and associated microbial assembly processes in sand

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 3, doi: 10.1007/s11783-023-1634-z

Abstract:

● Backwashing in sand filters with 2-h and 4-h EBCTs was simulated.

Keywords： Sand filter     Backwashing     Recovery     Micropollutants     Community composition    

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Occurrence and Roles of Comammox Bacteria in Water and Wastewater Treatment Systems: A Critical Review Review

Naga Raju Maddela, Zhihao Gan, Yabing Meng, Fuqiang Fan, Fangang Meng

Engineering 2022, Volume 17, Issue 10,   Pages 196-206 doi: 10.1016/j.eng.2021.07.024

Abstract:

Nitrogen removal is a critical process in water treatment plants (WTPs) and wastewater treatment plants (WWTPs). The recent discovery of a novel bacterial process, complete ammonia oxidation (comammox, CMX), has refuted a century-long perception of the two-step conversion of NH3 to NO3–. Compared with canonical nitrifiers, CMX bacteria offer undeniable advantages, such as a high growth yield propensity and adaptability to nutrient- and growth-limiting conditions, which collectively draw attention to validate the aptness of CMX bacteria to wastewater treatment. As there has been no comprehensive review on the relevance of CMX bacteria for sustainable water and wastewater treatment, this review is intended to discuss the roles and applications of CMX in the removal of nitrogen and pollutants from water and wastewater. We took into account insights into the metabolic versatilities of CMX bacteria at the clade and subclade levels. We focused on the distribution of CMX bacteria in engineered systems, niche differentiation, co-occurrence and interactions with canonical nitrifiers for a better understanding of CMX bacteria in terms of their ecophysiology. Conceptualized details on the reactor adaptability and stress response of CMX bacteria are provided. The potential of CMX bacteria to degrade micropollutants either directly or co-metabolically was evaluated, and these insights would be an indispensable advantage in opening the doors for wider applications of CMX bacteria in WWTPs. Finally, we summarized future directions of research that are imperative in improving the understanding of CMX biology.

Keywords： Comammox bacteria     Wastewater treatment     Nitrogen removal     Micropollutant degradation     Reactor operation    

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Influence of construction-induced damage on the degradation of freeze–thawed lightweight cellular concrete

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 781-792 doi: 10.1007/s11709-021-0733-9

Abstract: construction of lightweight cellular concrete (LCC), material damage frequently occurs, causing the degradation

Keywords： lightweight cellular concrete     construction-induced damage     freeze-thaw action     microstructure     degradation    

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Efficient degradation of orange II by ZnMn

Qingzhuo Ni, Hao Cheng, Jianfeng Ma, Yong Kong, Sridhar Komarneni

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 6,   Pages 956-966 doi: 10.1007/s11705-019-1907-z

Abstract: Its catalytic activity has been investigated for the degradation of orange II dye using three differentThe last system exhibits the maximum degradation efficiency of 90%, much higher than the photocatalysisFurthermore, the potential degradation mechanisms applicable to the three systems are discussed withactive species such as Mn(III), O , h , e , SO and HO are proposed to be responsible for the excellent degradation

Keywords： ZnMn2O4     photo-chemical catalysis     bisulfite     dye degradation    

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Promotive effect of pyridine on indole degradation by activated sludge under anoxic conditions

LI Yongmei, GU Guowei, LI Wenshu

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 4,   Pages 493-497 doi: 10.1007/s11783-007-0079-0

Abstract: Batch experiments were carried out to investigate the promotive effect of pyridine on indole degradation

Keywords： wastewater treatment     coal-coking wastewater     promotive     degradation    

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anchored alginate/poly(acrylic acid/acrylamide) double-network hydrogel composites for efficient catalytic degradation

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 7,   Pages 893-905 doi: 10.1007/s11705-022-2290-8

Abstract: In the tap water system and simulated seawater system, the degradation time of p-nitrophenol atMoreover, the catalyst exhibited outstanding performance in the degradation experiment of four typical

Keywords： double-network hydrogel     dye degradation     silver nanoparticles     alginate    

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Sustainable wood-based nanotechnologies for photocatalytic degradation of organic contaminants in aquatic

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1346-6

Abstract:

•Wood and its reassemblies are ideal substrates to develop novel photocatalysts.

Keywords： Wood     Nanocatalysts     Photodegradation     Organic contaminants     Composites    

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Thermal degradation kinetics and lifetime estimation for polycarbonate/polymethylphenylsilsesquioxane

Jiangbo WANG, Zhong XIN

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 2,   Pages 167-171 doi: 10.1007/s11705-009-0006-y

Abstract: The thermal degradation behaviors of polycarbonate/polymethylphenylsilsesquioxane (FRPC) composites wereThe isothermal kinetics equation was used to describe the thermal degradation process.The results showed that activation energy ( ), in the case of isothermal degradation, was a quick increasingisothermal condition, the addition of polymethylphenylsilsesquioxane (PMPSQ) retardanted the thermal degradationand enhanced the thermal stability of PC during the early and middle stages of thermal degradation.

Keywords： polycarbonate     polymethylphenylsilsesquioxane     thermal degradation kinetics     activation energy     lifetime    

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bismuth oxyiodide with highly exposed (110) facets on curved carbon nitride for the photocatalytic degradation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 7,   Pages 1125-1138 doi: 10.1007/s11705-021-2116-0

Abstract: (110) facet and abundant oxygen vacancies were successfully designed to enhance the photocatalytic degradationOxytetracycline (OTC) and methyl blue dyes were used as targets for pollutant degradation, and 85.6%and 96.5% photocatalytic degradation efficiencies, respectively, were observed in the optimal proportionshowed that •O2– and h+ played a major role in the process of pollutant degradationchromatography-mass spectrography was used to identify the reaction intermediates of OTC, and the possible degradation

Keywords： high-exposure (110) facet     oxygen vacancy-rich     BiOI-110/DCN heterojunction     photocatalytic degradation    

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UV-LED/P25-based photocatalysis for effective degradation of isothiazolone biocide

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1379-x

Abstract:

• UV-LED with shorter wavelength was beneficial for photocatalytic degradation

Keywords： Degradation     Photocatalytic     LED     CMIT     P25    

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Mechanistic insights into the selective photocatalytic degradation of dyes over TiO/ZSM-11

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 8, doi: 10.1007/s11783-023-1701-5

Abstract:

● TiO2/ZSM-11 was prepared by a facile solid state dispersion method.

Keywords： Selective dye degradation     Photocatalysis     TiO2     ZSM-11     Chemisorption    

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Photocatalytic degradation of methyl orange using ZnO/TiO composites

Ming GE , Changsheng GUO , Xingwang ZHU , Lili MA , Wei HU , Yuqiu WANG , Zhenan HAN ,

Frontiers of Environmental Science & Engineering 2009, Volume 3, Issue 3,   Pages 271-280 doi: 10.1007/s11783-009-0035-2

Abstract: and ultrasonic precipitation followed by heat treatment in order to investigate their photocatalytic degradationThe degradation efficiencies of MO at various pH values were obtained.The highest degradation efficiencies were obtained before 30min and after 60min at pHSix intermediates were found during the photocatalytic degradation process of quinonoid MO.The degradation pathway of quinonoid MO was also proposed.

Keywords： photocatalytic degradation     methyl orange     ZnO/TiO2 composites     high performance liquid chromatography    

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Acid Orange 7 degradation using methane as the sole carbon source and electron donor

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 3, doi: 10.1007/s11783-021-1468-5

Abstract:

• AO7 degradation was coupled with anaerobic methane oxidation.

Keywords： Azo dyes     AO7 degradation     Anaerobic methane oxidation     Microbial community     ANME-2d    

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Photocatalytic degradation of polybrominated diphenyl ethers in pure water system

Min ZHANG,Jian LU,Yiliang HE,P Chris WILSON

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 2,   Pages 229-235 doi: 10.1007/s11783-014-0762-x

Abstract: In this study the photocatalytic degradation of decabromodiphenyl ether (BDE209), a type of polybrominatedAlthough the addition of organic solvent (tetrahydrofuran, THF) could lead to a relatively high BDE209 degradationtetrahydro-2-furanol and γ-butyrolactone, were detected indicating the engagement of THF in the BDE209 degradationThe photocatalytic degradation of BDE209 in the pure water system followed first-order kinetics.The BDE209 degradation rate constant increased from 0.0011 to 0.0023 min as the pH increased from 3

Keywords： polybrominated diphenyl ethers     photocatalytic degradation     solvent    

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The effect of altering crosslinker chemistry during interfacial polymerization on the performance of nanofiltration membranes for desalination, organic, and micropollutants removal

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 2025-2036 doi: 10.1007/s11705-023-2356-2

Abstract: Chemistry of the polyamide active layer of a desalination membrane is critical in determining both its physical and chemical properties. In this study, we designed and fabricated three novel membranes with different active layers using the crosslinkers: terephthaloyl chloride, isophthaloyl chloride, and trimesoyl chloride. The crosslinkers were reacted with an aqueous solution of an aliphatic tetra-amine. Because these crosslinkers differ in their structures and crosslinking mechanisms during interfacial polymerization, the resultant membranes also possess different structural properties. The water contact angle of the fabricated membranes also varies; the water contact angles of 4A-3P-TPC@PSF/PET, 4A-3P-TMC@PSF/PET, and 4A-3P-IPC@PSF/PET, are 68.9°, 65.6°, and 53.9°, respectively. Similarly, the desalination performance of resultant membranes also showed variations, with 4A-3P-TPC@PSF/PET, 4A-3P-IPC@PSF/PET, and 4A-3P-TMC@PSF/PET having a permeate flux of 17.14, 25.70, and 30.90 L·m−2·h−1, respectively, at 2.5 MPa. The 4A-3P-TPC@PSF/PET membrane exhibited extensive crosslinking with aliphatic linear amine, and cationic dye rhodamine B, MgCl2, and amitriptyline rejection rates of 98.6%, 92.7% and 80.9%, respectively. The 4A-3P-TMC@PSF/PET membrane showed mediocre performance, while 4A-3P-IPC@PSF/PET membrane showed even lower performance, with a 35% rejection of methyl orange dye.

Keywords： acid chlorides     covalent crosslinking     desalination     linear aliphatic amine     micropollutant removal    

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Title Author Date Type Operation

Impacts of backwashing on micropollutant removal and associated microbial assembly processes in sand

Journal Article

Occurrence and Roles of Comammox Bacteria in Water and Wastewater Treatment Systems: A Critical Review

Naga Raju Maddela, Zhihao Gan, Yabing Meng, Fuqiang Fan, Fangang Meng

Journal Article

Influence of construction-induced damage on the degradation of freeze–thawed lightweight cellular concrete

Journal Article

Efficient degradation of orange II by ZnMn

Qingzhuo Ni, Hao Cheng, Jianfeng Ma, Yong Kong, Sridhar Komarneni

Journal Article

Promotive effect of pyridine on indole degradation by activated sludge under anoxic conditions

LI Yongmei, GU Guowei, LI Wenshu

Journal Article

anchored alginate/poly(acrylic acid/acrylamide) double-network hydrogel composites for efficient catalytic degradation

Journal Article

Sustainable wood-based nanotechnologies for photocatalytic degradation of organic contaminants in aquatic

Journal Article

Thermal degradation kinetics and lifetime estimation for polycarbonate/polymethylphenylsilsesquioxane

Jiangbo WANG, Zhong XIN

Journal Article

bismuth oxyiodide with highly exposed (110) facets on curved carbon nitride for the photocatalytic degradation

Journal Article

UV-LED/P25-based photocatalysis for effective degradation of isothiazolone biocide

Journal Article

Mechanistic insights into the selective photocatalytic degradation of dyes over TiO/ZSM-11

Journal Article

Photocatalytic degradation of methyl orange using ZnO/TiO composites

Ming GE , Changsheng GUO , Xingwang ZHU , Lili MA , Wei HU , Yuqiu WANG , Zhenan HAN ,

Journal Article

Acid Orange 7 degradation using methane as the sole carbon source and electron donor

Journal Article

Photocatalytic degradation of polybrominated diphenyl ethers in pure water system

Min ZHANG,Jian LU,Yiliang HE,P Chris WILSON

Journal Article

The effect of altering crosslinker chemistry during interfacial polymerization on the performance of nanofiltration membranes for desalination, organic, and micropollutants removal

Journal Article