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  1. AU="Kedong Ma"
  2. AU="Valdés-Bécares, Ana"
  3. AU="Sarah‐Lee Bekaert"
  4. AU="Foster, Angel M"
  5. AU="Muzik, Otto"
  6. AU="De Leo, Pasqualina"
  7. AU="Chatterjee, Pabitra B"
  8. AU="Papandreou, Z"
  9. AU="Moore, E F"
  10. AU="Verhoeven, V"
  11. AU="Benchat, Noureddine" AU="Benchat, Noureddine"
  12. AU="El-Rayes, Mahmoud Kamil"
  13. AU="Aude de Watteville"
  14. AU="Balm, P W"
  15. AU="Peng, Zhenling"
  16. AU="Du, Peilin"
  17. AU="Yeh, Pamela"
  18. AU="Moloney, Gail"
  19. AU="Murphy, Ross G"
  20. AU="Petronilho, Sara"
  21. AU="Ordóñez, Raquel"
  22. AU="Mulvaney, Robert"
  23. AU="Amarin, Z"
  24. AU="Vadlin, S"
  25. AU="Erin E. Michalak"
  26. AU="Cassidy, Caitlin A"
  27. AU="Veronica Davalos"
  28. AU="Koba, Wade R"
  29. AU="Cui, Hongyan"
  30. AU="Ross, Nina E"
  31. AU="Atwa, Hanaa A"
  32. AU="Reid, Carly"

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  1. Artikel ; Online: Increasing Surface Functionalities of FeCl 3 -Modified Reed Waste Biochar for Enhanced Nitrate Adsorption Property

    Peijing Kuang / Yubo Cui / Zhongwei Zhang / Kedong Ma / Wanjun Zhang / Ke Zhao / Xiaomeng Zhang

    Processes, Vol 11, Iss 1740, p

    2023  Band 1740

    Abstract: Ferric chloride (FeCl 3 ) modified reed straw-based biochar was synthesized to remove nitrate from aqueous solutions and achieve waste recycling. The adsorption of nitrate onto Fe-RBC-600 adsorbents could be described by the pseudo-second-order kinetic ... ...

    Abstract Ferric chloride (FeCl 3 ) modified reed straw-based biochar was synthesized to remove nitrate from aqueous solutions and achieve waste recycling. The adsorption of nitrate onto Fe-RBC-600 adsorbents could be described by the pseudo-second-order kinetic model and fitted to Langmuir adsorption, and the maximum adsorption capacity predicted using the Langmuir model was 272.024 mg g −1 . The adsorbent characterization indicated that a high temperature of 600 °C and an oxygen-poor environment could develop a hydrophobic surface and O-containing functional groups on the biochar, which provided more binding sites for Fe 3+ /Fe 2+ attachment and increased the surface functionality of Fe-RBC-600 with iron oxide formation. The increasing surface functionality successfully enhanced the nitrate adsorption property. The mechanism of nitrate adsorption was mainly attributed to the physical adsorption onto the positive surface and sequential chemical reduction by Fe 2+ , and the electrostatic adsorption by protonated amine groups.
    Schlagwörter reed waste biochar ; nitrate adsorption property ; iron modification ; surface functionalities ; mechanism ; Chemical technology ; TP1-1185 ; Chemistry ; QD1-999
    Thema/Rubrik (Code) 333
    Sprache Englisch
    Erscheinungsdatum 2023-06-01T00:00:00Z
    Verlag MDPI AG
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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  2. Artikel: Simultaneous concentration and detoxification of lignocellulosic hydrolysates by novel membrane filtration system for bioethanol production

    Pan, Liwei / Mingxiong He / Bo Wu / Yanwei Wang / Guoquan Hu / Kedong Ma

    Journal of cleaner production. 2019 Aug. 01, v. 227

    2019  

    Abstract: The presence of inhibitory compounds as well as low sugar concentration was the main challenge in lignocellulosic hydrolysate based biofuels production. The objective of this study was to develop an effective membrane filtration process for ... ...

    Abstract The presence of inhibitory compounds as well as low sugar concentration was the main challenge in lignocellulosic hydrolysate based biofuels production. The objective of this study was to develop an effective membrane filtration process for simultaneously separating inhibitors and concentrating sugars to improve the lignocellulosic hydrolysate fermentability. The nanofiltration (NF) and reverse osmosis (RO) membranes were chosen to evaluate their sugar rejection and inhibitor removal performance using real lignocellulosic hydrolysate in batch recycling mode. The influence of soluble anionic polymer addition, anionic polymer concentration and pH on sugar rejection and inhibitor removal was examined. The results implied that application of sodium tripolyphosphate during NF/RO could improve the inhibitor separation in particular formic acid and acetic acid removal was significantly enhanced. Moreover, pH adjustment for hydrolysate prior to detoxification and concentration and fermentation could be avoided. The concentration experiment indicated that NF-RO hybrid membrane improved sugar rejection but did not cause the obvious increase in inhibitor concentration. Overall, the total sugar titer at the end of concentration mode was 145.6 g/L compared to the initial titer of 38.4 g/L at a volume concentration ratio (VCR) of 4. Furthermore, diafiltration with RO after NF-RO hybrid membrane filtration achieved maximum sugar recovery and inhibitor removal, consequently led to successful ethanol fermentation using detoxified retentate. After 134 h cultivation, the ethanol maximum concentration, productivity and yield of diafiltrated retentate reached 45.16 g/L, 0.34 g/L/h and 0.44 g/g, which were comparable to that of control. These observations indicated that the novel membrane filtration system proposed could achieve simultaneous lignocellulosic hydrolysate detoxification and concentration, which would greatly reduce the number of processing steps, operating cost and energy consumption, consequently improve the production efficiency. Therefore, it could be considered as promising strategy for large scale industrial lignocellulosic bioenergy production.
    Schlagwörter acetic acid ; biofuels ; energy use and consumption ; ethanol ; ethanol fermentation ; ethanol production ; formic acid ; fuel production ; hydrolysates ; lignocellulose ; microfiltration ; nanofiltration ; operating costs ; pH ; polymers ; recycling ; reverse osmosis ; sodium tripolyphosphate ; sugars
    Sprache Englisch
    Erscheinungsverlauf 2019-0801
    Umfang p. 1185-1194.
    Erscheinungsort Elsevier Ltd
    Dokumenttyp Artikel
    ISSN 0959-6526
    DOI 10.1016/j.jclepro.2019.04.239
    Datenquelle NAL Katalog (AGRICOLA)

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  3. Artikel: Extracellular polymeric substances, microbial activity and microbial community of biofilm and suspended sludge at different divalent cadmium concentrations

    Wang, Zichao / Jing Zhang / Junfeng Wei / Kedong Ma / Mengchun Gao / Shuping Yu / Yusuo Yang

    Bioresource technology. 2016 Apr., v. 205

    2016  

    Abstract: The differences between biofilm and suspended sludge (S-sludge) in extracellular polymeric substances (EPS), microbial activity, and microbial community in an anoxic-aerobic sequencing batch biofilm reactor (SBBR) at different concentrations of divalent ... ...

    Abstract The differences between biofilm and suspended sludge (S-sludge) in extracellular polymeric substances (EPS), microbial activity, and microbial community in an anoxic-aerobic sequencing batch biofilm reactor (SBBR) at different concentrations of divalent cadmium (Cd(II)) were investigated. As the increase of Cd(II) concentration from 0 to 50mgL−1, the specific ammonium oxidation rate (SAOR), specific nitrite oxidation rate (SNOR), and specific nitrate reduction rate (SNRR) of biofilm decreased from 4.85, 5.22 and 45mgNg−1 VSSh−1 to 1.54, 2.38 and 26mgNg−1VSSh−1, respectively, and the SAOR, SNOR and SNRR of S-sludge decreased from 4.80, 5.02 and 34mgNg−1VSSh−1 to 1.46, 2.20 and 17mgNg−1VSSh−1, respectively. Biofilm had higher protein (PN) content in EPS than S-sludge. Contrast to S-sludge, biofilm could provide Nitrobacter vulgaris, beta proteobacterium INBAF015, and Pseudoxanthomonas mexicana with the favorable conditions of growth and reproduction.
    Schlagwörter biofilm ; cadmium ; microbial activity ; microbial communities ; nitrate reduction ; nitrites ; Nitrobacter vulgaris ; oxidation ; Pseudoxanthomonas ; reproduction ; sludge
    Sprache Englisch
    Erscheinungsverlauf 2016-04
    Umfang p. 213-221.
    Erscheinungsort Elsevier Ltd
    Dokumenttyp Artikel
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2016.01.067
    Datenquelle NAL Katalog (AGRICOLA)

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  4. Artikel: Long-term effects of combined divalent copper and tetracycline on the performance, microbial activity and community in a sequencing batch reactor

    Wang, Zichao / Guoxia Zheng / Jinbo Chen / Jing Zhang / Junfeng Wei / Kedong Ma / Lin Wang / Mengchun Gao / Pinghui Xia / Yuejing Wang / Yusuo Yang / Zhiwei Deng

    Bioresource technology. 2018 Feb., v. 249

    2018  

    Abstract: The long-term effects of combined divalent copper (Cu(II)) and tetracycline (TC) on the performance, microbial activity and community in a sequencing batch reactor (SBR) were investigated. The addition of Cu(II), TC or mixed Cu(II)/TC caused the decrease ...

    Abstract The long-term effects of combined divalent copper (Cu(II)) and tetracycline (TC) on the performance, microbial activity and community in a sequencing batch reactor (SBR) were investigated. The addition of Cu(II), TC or mixed Cu(II)/TC caused the decrease of the organics and nitrogen removal efficiencies, and their decreased degrees were the lowest at the addition of mixed Cu(II)/TC. The increase of mixed Cu(II)/TC concentrations in the influent did not change the antagonistic effects between Cu(II) and TC on nitrifying and denitrifying activities. Nitrifiers had higher tolerances to Cu(II), TC and mixed Cu(II)/TC than denitrifiers. Compared to the addition of Cu(II) or TC alone, the microbial community richness was higher at the addition of mixed Cu(II)/TC, while the microbial community diversity was lower. The increased protein (PN) in extracellular polymeric substances (EPS) was a protective response of bacteria to Cu(II), TC and mixed Cu(II)/TC.
    Schlagwörter bacteria ; copper ; denitrification ; denitrifying microorganisms ; long term effects ; microbial activity ; microbial communities ; nitrogen ; tetracycline
    Sprache Englisch
    Erscheinungsverlauf 2018-02
    Umfang p. 916-923.
    Erscheinungsort Elsevier Ltd
    Dokumenttyp Artikel
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2017.11.006
    Datenquelle NAL Katalog (AGRICOLA)

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