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  1. Article: Application and validation of a biotic ligand model for calculating acute toxicity of lead to Moina dubia in lakes of Hanoi, Vietnam

    Pham, Hong Thi / Vu, Long Duc / Lê, Ngoc Chi / Hoang, Thu-Huong Thi

    Environmental science and pollution research. 2022 June, v. 29, no. 28

    2022  

    Abstract: It is increasingly being recognized that biotic ligand models (BLMs) can successfully predict the toxicity of divalent metals toward aquatic biota applied to temperate freshwater ecosystems. However, studies on the eutrophic lakes in tropical regions ... ...

    Abstract It is increasingly being recognized that biotic ligand models (BLMs) can successfully predict the toxicity of divalent metals toward aquatic biota applied to temperate freshwater ecosystems. However, studies on the eutrophic lakes in tropical regions toward native tropical organisms, including Moina, are relatively limited. In this study, Moina dubia, the native organism of the Hanoi eutrophic urban lakes, were used in toxicological studies of lead (Pb); 24-h EC₅₀ value of Pb was 523.19 µg/L under optimal living conditions for M. dubia in the laboratory. The constant binding of Pb²⁺ on M. dubia surface sites (log KPbBL = 2.38) was significantly low. Other stability constants were obtained under experiments as logKCₐBL = 2.48, logKMgBL = 2.80, logKNₐBL = 2.35, logKKBL = 2.49, and logKHBL = 3.026. A BLM was developed to calculate the acute toxicity (EC₅₀-24 h) of lead on M. dubia based on the condition of the urban lakes of Hanoi. Validation with toxicity data in synthetic medium showed a coefficient determination of 79.16% and a mean absolute percentage error (MAPE) of 10.2%, while the validation with the toxicity data with natural water medium from 11 Hanoi lakes showed a coefficient determination of 73.7% and a MAPE of 13.66%. The BLM worked well with water at a pH of 7.0 to 8.0, but failed with water at a pH above 8.0. Eutrophic conditions proved to have a significant effect on the toxicity of lead on local zooplankton.
    Keywords Moina ; acute toxicity ; eutrophication ; freshwater ; ligands ; models ; pH ; pollution ; research ; toxicology ; zooplankton ; Vietnam
    Language English
    Dates of publication 2022-06
    Size p. 42005-42015.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-021-16884-x
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: Application and validation of a biotic ligand model for calculating acute toxicity of lead to Moina dubia in lakes of Hanoi, Vietnam.

    Pham, Hong Thi / Vu, Long Duc / Lê, Ngoc Chi / Hoang, Thu-Huong Thi

    Environmental science and pollution research international

    2021  Volume 29, Issue 28, Page(s) 42005–42015

    Abstract: It is increasingly being recognized that biotic ligand models (BLMs) can successfully predict the toxicity of divalent metals toward aquatic biota applied to temperate freshwater ecosystems. However, studies on the eutrophic lakes in tropical regions ... ...

    Abstract It is increasingly being recognized that biotic ligand models (BLMs) can successfully predict the toxicity of divalent metals toward aquatic biota applied to temperate freshwater ecosystems. However, studies on the eutrophic lakes in tropical regions toward native tropical organisms, including Moina, are relatively limited. In this study, Moina dubia, the native organism of the Hanoi eutrophic urban lakes, were used in toxicological studies of lead (Pb); 24-h EC
    MeSH term(s) Animals ; Cladocera ; Ecosystem ; Lakes ; Lead ; Ligands ; Vietnam ; Water ; Water Pollutants, Chemical/toxicity
    Chemical Substances Ligands ; Water Pollutants, Chemical ; Water (059QF0KO0R) ; Lead (2P299V784P)
    Language English
    Publishing date 2021-10-21
    Publishing country Germany
    Document type Journal Article
    ZDB-ID 1178791-0
    ISSN 1614-7499 ; 0944-1344
    ISSN (online) 1614-7499
    ISSN 0944-1344
    DOI 10.1007/s11356-021-16884-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

    Full text online

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  3. Article ; Online: Estimating ammonium changes in pilot and full-scale constructed wetlands using kinetic model, linear regression, and machine learning.

    Nguyen, X Cuong / Nguyen, T Phuong / Lam, V Son / Le, Phuoc-Cuong / Vo, T Dieu Hien / Hoang, Thu-Huong Thi / Chung, W Jin / Chang, S Woong / Nguyen, D Duc

    The Science of the total environment

    2023  Volume 907, Page(s) 168142

    Abstract: Constructed wetlands (CWs) are a widely utilized nature-based wastewater treatment method for various effluents. However, their application has been more focused on pilot and full-scale CWs with substantial surface areas and extended operation times, ... ...

    Abstract Constructed wetlands (CWs) are a widely utilized nature-based wastewater treatment method for various effluents. However, their application has been more focused on pilot and full-scale CWs with substantial surface areas and extended operation times, which hold greater relevance in practical scenarios. This study used kinetics, linear regression (LR), and machine learning (ML) models to estimate effluent ammonium in pilot and full-scale CWs. From screening 1476 papers, 24 pilot and full-scale CW studies were selected to extract data containing 15 features and 975 data points. Nine models were fit to this data, revealing that linear models were less effective in capturing CW effluent compared to nonlinear ML algorithms. For training data, the Monod kinetic model predicted the poorest performance with an RMSE of 41.84 mg/L and R
    Language English
    Publishing date 2023-10-26
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.168142
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 949: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  4. Article ; Online: Greenhouse Gas Emissions from Blackwater Septic Systems.

    Huynh, Loi Tan / Harada, Hidenori / Fujii, Shigeo / Nguyen, Lien Pham Hong / Hoang, Thu-Huong Thi / Huynh, Hai Trung

    Environmental science & technology

    2021  Volume 55, Issue 2, Page(s) 1209–1217

    Abstract: Septic systems are potentially a significant source of greenhouse gases (GHGs). The present study investigated GHGs from the blackwater septic systems that are widely used especially in low- and middle-income countries. Ten blackwater septic tanks in ... ...

    Abstract Septic systems are potentially a significant source of greenhouse gases (GHGs). The present study investigated GHGs from the blackwater septic systems that are widely used especially in low- and middle-income countries. Ten blackwater septic tanks in Hanoi, Vietnam, were investigated using the floating chamber method. The average methane and carbon dioxide emission rates measured at the first compartment (65% of total capacity) of the septic tanks were 11.92 and 20.24 g/cap/day, respectively, whereas nitrous oxide emission was negligible. Methane emission rate was significantly correlated with septage oxidation-reduction potential (ORP) (
    MeSH term(s) Carbon Dioxide/analysis ; Greenhouse Effect ; Greenhouse Gases ; Methane/analysis ; Nitrous Oxide/analysis ; Vietnam
    Chemical Substances Greenhouse Gases ; Carbon Dioxide (142M471B3J) ; Nitrous Oxide (K50XQU1029) ; Methane (OP0UW79H66)
    Language English
    Publishing date 2021-01-06
    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.0c03418
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Microplastics in sediments from urban and suburban rivers: Influence of sediment properties.

    Duong, Thi Thuy / Nguyen-Thuy, Duong / Phuong, Ngoc Nam / Ngo, Ha My / Doan, Thi Oanh / Le, Thi Phuong Quynh / Bui, Ha Manh / Nguyen-Van, Huong / Nguyen-Dinh, Thai / Nguyen, Thi Anh Nguyet / Cao, Thi Thanh Nga / Pham, Thi Minh Hanh / Hoang, Thu-Huong Thi / Gasperi, Johnny / Strady, Emilie

    The Science of the total environment

    2023  Volume 904, Page(s) 166330

    Abstract: Although sediments are considered to be a major sink for microplastics (MP), there is still a relative lack of knowledge on the factors that influence the occurrence and abundance of MP in riverine sediments. The present study investigated the occurrence ...

    Abstract Although sediments are considered to be a major sink for microplastics (MP), there is still a relative lack of knowledge on the factors that influence the occurrence and abundance of MP in riverine sediments. The present study investigated the occurrence and distribution of MP in riverine sediments collected at twelve sites representative of different populated and urbanized rivers (To Lich, Nhue and Day Rivers) located in the Red River Delta (RRD, Vietnam, during dry and rainy seasons. MP concentrations ranged from 1600 items kg
    Language English
    Publishing date 2023-08-15
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2023.166330
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Zs.A 949: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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  6. Article: Modelling Tools to Analyze and Assess the Ecological Impact of Hydropower Dams

    Nguyen, Thi Hanh Tien / Bennetsen, Elina / Boets, Pieter / Everaert, Gert / Forio, Marie Anne Eurie / Goethals, Peter L. M / Hoang, Thu Huong Thi / Volk, Martin

    Water. 2018 Mar. 02, v. 10, no. 3

    2018  

    Abstract: We critically analyzed a set of ecological models that are used to assess the impact of hydropower dams on water quality and habitat suitability for biological communities. After a literature search, we developed an integrated conceptual model that ... ...

    Abstract We critically analyzed a set of ecological models that are used to assess the impact of hydropower dams on water quality and habitat suitability for biological communities. After a literature search, we developed an integrated conceptual model that illustrates the linkages between the main input variables, model approaches, the output variables and biotic-abiotic interactions in the ecosystems related to hydropower dams. We found that variations in water flow and water depth coupled with increased nutrient availability are major variables that contribute to structural and functional ecosystem changes. We also found that ecological models are an important tool to assess the impact of hydropower dams. For instance, model simulation of different scenarios (e.g., with and without the dam, different operation methods) can analyze and predict the related ecosystem shifts. However, one of the remaining shortcomings of these models is the limited capacity to separate dam-related impacts from other anthropogenic influences (e.g., agriculture, urbanization). Moreover, collecting sufficient high-quality data to increase the statistical power remains a challenge. The severely altered conditions (e.g., generation of very deep lakes) also lead to difficulties for standardized data collection. We see future opportunities in the integration of models to improve the understanding of the different processes affected by hydropower dam development and operation, as well as the use of remote sensing methods for data collection.
    Keywords anthropogenic activities ; dams (hydrology) ; data collection ; ecological models ; ecosystems ; environmental impact ; habitats ; lakes ; nutrient availability ; remote sensing ; simulation models ; urbanization ; water flow ; water quality
    Language English
    Dates of publication 2018-0302
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2521238-2
    ISSN 2073-4441
    ISSN 2073-4441
    DOI 10.3390/w10030259
    Database NAL-Catalogue (AGRICOLA)

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  7. Article: Threshold Responses of Macroinvertebrate Communities to Stream Velocity in Relation to Hydropower Dam: A Case Study from The Guayas River Basin (Ecuador)

    Nguyen, Thi Hanh Tien / Boets, Pieter / Damanik Ambarita, Minar Naomi / Dominguez-Granda, Luis Elvin / Everaert, Gert / Forio, Marie Anne Eurie / Goethals, Peter / Hoang, Thu Huong Thi / Lock, Koen / Suhareva, Natalija / Van der heyden, Christine

    Water. 2018 Sept. 06, v. 10, no. 9

    2018  

    Abstract: The Guayas River basin is one of the most important water resources in Ecuador, but the expansion of human activities has led to a degraded water quality. The purpose of this study was (1) to explore the importance of physical-chemical variables in ... ...

    Abstract The Guayas River basin is one of the most important water resources in Ecuador, but the expansion of human activities has led to a degraded water quality. The purpose of this study was (1) to explore the importance of physical-chemical variables in structuring the macroinvertebrate communities and (2) to determine if the thresholds in stream velocity related to macroinvertebrate community composition could be identified in the Guayas River basin. Thus, macroinvertebrates and physical–chemical water quality variables were sampled at 120 locations during the dry season of 2013 in the Guayas River basin. Canonical correspondence analysis (CCA) was performed to identify relevant physical–chemical characteristics of the river influencing the distribution of the macroinvertebrate communities. Threshold indicator taxa analysis (TITAN) was used to discriminate between the macroinvertebrate community related to stagnant waters (Daule–Peripa reservoir) and to running waters. CCA indicates that the most important environmental factors influencing the distribution of macroinvertebrate communities were stream velocity, chlorophyll concentration, conductivity, temperature and elevation. Tipping points for the macroinvertebrate community were defined by stream velocity at 0.03 m/s and 0.4 m/s, i.e., stagnant-water (including dam-related reservoirs) taxa start to quickly decrease in abundance and frequency at 0.03 m/s while running-water taxa start to quickly increase in abundance and frequency at 0.03 m/s until a stream velocity of 0.4 m/s. The results provide essential information to define environmental flows to further support water management plans of the Guayas River basin. Information obtained will be useful for management of similar rivers in South America, as well as the rest of the world.
    Keywords anthropogenic activities ; case studies ; chlorophyll ; community structure ; correspondence analysis ; dams (hydrology) ; dry season ; environmental factors ; indicator species ; macroinvertebrates ; rivers ; streams ; temperature ; water quality ; watersheds ; Ecuador
    Language English
    Dates of publication 2018-0906
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2521238-2
    ISSN 2073-4441
    ISSN 2073-4441
    DOI 10.3390/w10091195
    Database NAL-Catalogue (AGRICOLA)

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