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  1. Article ; Online: Release Behavior of Liquid Crystal Monomers from Waste Smartphone Screens: Occurrence, Distribution, and Mechanistic Modeling.

    Jin, Qianqian / Yu, Jianxin / Fan, Yinzheng / Zhan, Yuting / Tao, Danyang / Tang, Jingchun / He, Yuhe

    Environmental science & technology

    2023  Volume 57, Issue 28, Page(s) 10319–10330

    Abstract: Liquid crystal display (LCD) screens can release many organic pollutants into the indoor environment, including liquid crystal monomers (LCMs), which have been proposed as a novel class of emerging pollutants. Knowing the release pathways and mechanisms ... ...

    Abstract Liquid crystal display (LCD) screens can release many organic pollutants into the indoor environment, including liquid crystal monomers (LCMs), which have been proposed as a novel class of emerging pollutants. Knowing the release pathways and mechanisms of LCMs from various components of LCD screens is important to accurately assess the LCM release and reveal their environmental transport behavior and fate in the ambient environment. A total of 47, 43, and 33 out of 64 target LCMs were detected in three disassembled parts of waste smartphone screens, including the LCM layer (LL), light guide plate (LGP), and screen protector (SP), respectively. Correlation analysis confirmed LL was the source of LCMs detected in LGP and SP. The emission factors of LCMs from waste screen, SP, and LGP parts were estimated as 2.38 × 10
    MeSH term(s) Air Pollutants/analysis ; Liquid Crystals ; Smartphone ; Environmental Pollutants ; Environmental Monitoring
    Chemical Substances Air Pollutants ; Environmental Pollutants
    Language English
    Publishing date 2023-06-27
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1520-5851
    ISSN (online) 1520-5851
    DOI 10.1021/acs.est.2c09602
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Revealing roles of CO

    He, Mingjing / Cao, Yang / Fan, Yinzheng / Mašek, Ondřej / Clark, James H / Tsang, Daniel C W

    Bioresource technology

    2023  Volume 385, Page(s) 129429

    Abstract: In this study, ... ...

    Abstract In this study, CO
    MeSH term(s) Carbon Sequestration ; Carbon Dioxide/analysis ; Carbon Dioxide/chemistry ; Nitrogen/analysis ; Nitrogen/chemistry ; Renewable Energy ; Temperature
    Chemical Substances Carbon Dioxide (142M471B3J) ; Nitrogen (N762921K75)
    Language English
    Publishing date 2023-06-29
    Publishing country England
    Document type Journal Article
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2023.129429
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Liquid crystal monomers in ventilation and air conditioning dust: Indoor characteristics, sources analysis and toxicity assessment.

    Jin, Qianqian / Fan, Yinzheng / Lu, Yichun / Zhan, Yuting / Sun, Jiaji / Tao, Danyang / He, Yuhe

    Environment international

    2023  Volume 180, Page(s) 108212

    Abstract: Indoor dust contaminated with liquid crystal monomers (LCMs) released from various commercial liquid crystal display (LCD) screens may pose environmental health risks to humans. This study aimed to investigate the occurrence of 64 LCMs in ventilation and ...

    Abstract Indoor dust contaminated with liquid crystal monomers (LCMs) released from various commercial liquid crystal display (LCD) screens may pose environmental health risks to humans. This study aimed to investigate the occurrence of 64 LCMs in ventilation and air conditioning filters (VACF) dust, characterize their composition profiles, potential sources, and associations with indoor characteristics, and assess their in vitro toxicity using the human lung bronchial epithelial cells (BEAS-2B). A total of 31 LCMs with concentrations (ΣLCMs) ranging from 43.7 ng/g to 448 ng/g were detected in the collected VACF dust. Additional analysis revealed the potential interactions between indoor environmental conditions and human exposure risks associated with the detected LCMs in VACF dust. The service area and working time of the ventilation and air conditioning system, and the number of indoor LCD screens were positively correlated with the fluorinated ΣLCMs in VACF dust (r = 0.355 ∼ 0.511, p < 0.05), while the associations with the non-fluorinated ΣLCMs were not found (p > 0.05), suggesting different environmental behavior and fates of fluorinated and non-fluorinated LCMs in the indoor environment. Four main indoor sources of LCMs (i.e., computer (37.1%), television (28.3%), Brand A smartphone (21.2%) and Brand S smartphone (13.4%)) were identified by positive matrix factorization-multiple linear regression (PMF-MLR). Exposure to 14 relatively frequently detected LCMs, individually and in the mixture, induced significant oxidative stress in BEAS-2B cells. Among them, non-fluorinated LCMs, specifically 3cH2B and MeP3bcH, caused dominant decreased cell viability. This study provides new insights into the indoor LCMs pollution and the associated potential health risks due to the daily use of electronic devices.
    Language English
    Publishing date 2023-09-18
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 554791-x
    ISSN 1873-6750 ; 0160-4120
    ISSN (online) 1873-6750
    ISSN 0160-4120
    DOI 10.1016/j.envint.2023.108212
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3131: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  4. Article ; Online: Revealing roles of CO2 and N2 in pressurized hydrothermal carbonization process for enhancing energy recovery and carbon sequestration

    He, Mingjing / Cao, Yang / Fan, Yinzheng / Mašek, Ondřej / Clark, James H. / Tsang, Daniel C.W.

    Bioresource Technology. 2023 Oct., v. 385 p.129429-

    2023  

    Abstract: In this study, CO₂– and N₂-pressurized hydrothermal carbonization processes were investigated to understand the catalytic effects of CO₂ on hydrochar production and its quality (e.g., surface properties, energy recovery, and combustion behaviour). Both ... ...

    Abstract In this study, CO₂– and N₂-pressurized hydrothermal carbonization processes were investigated to understand the catalytic effects of CO₂ on hydrochar production and its quality (e.g., surface properties, energy recovery, and combustion behaviour). Both CO₂– and N₂-pressurized HTC processes could enhance the energy recovery (from 61.5% to 63.0–67.8%) in hydrochar by enhancing the dehydration reactions. Nonetheless, the two systems exhibited contrasting trends in volatile release, oxygen removal, and combustion performance as a function of increasing pressure. High N₂ pressure enhanced deoxygenation reaction, facilitating the release of volatiles and increasing the hydrochar aromaticity and combustion activation energy (172.7 kJ/mol for HC/5N). Without the contribution of CO₂, excessively high pressure may cause an adverse impact on the fuel performance owing to higher oxidation resistance. This study presents an important and feasible strategy to utilise CO₂-rich flue gas in the HTC process to produce high-quality hydrochar for renewable energy and carbon recovery.
    Keywords activation energy ; carbon ; carbon dioxide ; carbon sequestration ; combustion ; energy recovery ; flue gas ; fuels ; hydrochars ; hydrothermal carbonization ; oxygen ; renewable energy sources ; technology ; Bio-renewable energy ; CO2 utilisation ; Combustion performance ; Energy and carbon balance ; Biochar/hydrochar
    Language English
    Dates of publication 2023-10
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2023.129429
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    In stock of ZB MED Bonn / Germany

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  5. Article ; Online: A comparative study on the use of palm bark as a supplementary carbon source in partially saturated vertical constructed wetland: Organic matter characterization, release-adsorption kinetics, and pilot-scale performance.

    Huang, Yang-Rui / Liu, Qi-Qi / Fan, Yin-Zheng / Li, Huai-Zheng

    Chemosphere

    2020  Volume 253, Page(s) 126663

    Abstract: In this study, a comparative investigation of palm bark and corncob (a well-investigated material) for enhancing nitrogen removal efficiency in partially saturated vertical constructed wetland (PSVCW) was performed to evaluate an effective and cost- ... ...

    Abstract In this study, a comparative investigation of palm bark and corncob (a well-investigated material) for enhancing nitrogen removal efficiency in partially saturated vertical constructed wetland (PSVCW) was performed to evaluate an effective and cost-effective supplementary carbon source. The characteristics of the released organic matter and the release processes were analyzed through optical property characterization and a first-order release-adsorption model, respectively, and the nitrogen removal performance was evaluated in a series of pilot-scale PSVCWs. Results showed that the amount of organic matter released per unit mass of corncob was larger than that released per unit mass of palm bark under the same pretreatment conditions (control, heat, and alkaline pretreatment). The organic matter released from corncob has a higher apparent molecular weight and a higher degree of aromatic condensation than those of the organic matter released from palm bark, whereas the organic matter released from palm bark has higher and more stable bioavailability. Moreover, palm bark showed a more significant improvement of release capacity with the heat and alkaline pretreatment methods. Pilot-scale studies revealed that PSVCW using palm bark as the supplementary carbon source has a longer replacement cycle and higher total nitrogen (TN) removal efficiency than that using corncob, indicating that palm bark can be considered an effective and inexpensive supplementary carbon source. This study provides initial guidance for the ongoing research on supplementary carbon sources for improving nitrogen removal efficiency in constructed wetlands.
    MeSH term(s) Adsorption ; Carbon ; Denitrification ; Kinetics ; Nitrogen ; Pilot Projects ; Plant Bark ; Waste Disposal, Fluid/methods ; Wetlands
    Chemical Substances Carbon (7440-44-0) ; Nitrogen (N762921K75)
    Language English
    Publishing date 2020-04-02
    Publishing country England
    Document type Journal Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2020.126663
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2540: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  6. Article: A comparative study on the use of palm bark as a supplementary carbon source in partially saturated vertical constructed wetland: Organic matter characterization, release-adsorption kinetics, and pilot-scale performance

    Huang, Yang-Rui / Liu, Qi-Qi / Fan, Yin-Zheng / Li, Huai-Zheng

    Chemosphere. 2020 Aug., v. 253

    2020  

    Abstract: In this study, a comparative investigation of palm bark and corncob (a well-investigated material) for enhancing nitrogen removal efficiency in partially saturated vertical constructed wetland (PSVCW) was performed to evaluate an effective and cost- ... ...

    Abstract In this study, a comparative investigation of palm bark and corncob (a well-investigated material) for enhancing nitrogen removal efficiency in partially saturated vertical constructed wetland (PSVCW) was performed to evaluate an effective and cost-effective supplementary carbon source. The characteristics of the released organic matter and the release processes were analyzed through optical property characterization and a first-order release-adsorption model, respectively, and the nitrogen removal performance was evaluated in a series of pilot-scale PSVCWs. Results showed that the amount of organic matter released per unit mass of corncob was larger than that released per unit mass of palm bark under the same pretreatment conditions (control, heat, and alkaline pretreatment). The organic matter released from corncob has a higher apparent molecular weight and a higher degree of aromatic condensation than those of the organic matter released from palm bark, whereas the organic matter released from palm bark has higher and more stable bioavailability. Moreover, palm bark showed a more significant improvement of release capacity with the heat and alkaline pretreatment methods. Pilot-scale studies revealed that PSVCW using palm bark as the supplementary carbon source has a longer replacement cycle and higher total nitrogen (TN) removal efficiency than that using corncob, indicating that palm bark can be considered an effective and inexpensive supplementary carbon source. This study provides initial guidance for the ongoing research on supplementary carbon sources for improving nitrogen removal efficiency in constructed wetlands.
    Keywords alkali treatment ; bark ; bioavailability ; carbon ; comparative study ; constructed wetlands ; corn cobs ; cost effectiveness ; heat ; molecular weight ; nitrogen ; organic matter ; total nitrogen
    Language English
    Dates of publication 2020-08
    Publishing place Elsevier Ltd
    Document type Article
    ZDB-ID 120089-6
    ISSN 1879-1298 ; 0045-6535 ; 0366-7111
    ISSN (online) 1879-1298
    ISSN 0045-6535 ; 0366-7111
    DOI 10.1016/j.chemosphere.2020.126663
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2540: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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