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  1. Article ; Online: Risk assessment of microplastic exposure: A case study near a refinery factory at the central coast of Vietnam.

    Le, Xuan Thanh Thao / Nguyen, Duy Thanh / Pham, Minh Tuan / Trinh, Minh Viet / Le, Phuoc Cuong / Do, Van Manh

    Marine pollution bulletin

    2023  Volume 196, Page(s) 115636

    Abstract: The goal of this study was to identify the presence of microplastics on the beach near a refinery in the central coast of Vietnam. In this study, 11 sampling sites were selected within a length of 300 m of the beach. The results showed that microplastics ...

    Abstract The goal of this study was to identify the presence of microplastics on the beach near a refinery in the central coast of Vietnam. In this study, 11 sampling sites were selected within a length of 300 m of the beach. The results showed that microplastics were presented in all collected samples with an average concentration of 1582 ± 660 MPs/kg. Fibers were the predominant shape of microplastics found in the samples, which accounted for 57.11 %, while the rest were classified as fragments. The average size of microplastics varied greatly around 83.1 ± 74.3 μm with the vast majority having a size smaller than 50 μm (41.84 %). A total of 11 polymers of microplastics were detected from collected samples, Polyethylene Terephthalate was the main polymer with 46.43 %. The pollution load index of microplastics was 3.15 showing that refinery activities could expose microplastic to the environment.
    MeSH term(s) Microplastics ; Plastics ; Vietnam ; Water Pollutants, Chemical/analysis ; Environmental Monitoring ; Polymers ; Risk Assessment
    Chemical Substances Microplastics ; Plastics ; Water Pollutants, Chemical ; Polymers
    Language English
    Publishing date 2023-10-07
    Publishing country England
    Document type Journal Article
    ZDB-ID 2001296-2
    ISSN 1879-3363 ; 0025-326X
    ISSN (online) 1879-3363
    ISSN 0025-326X
    DOI 10.1016/j.marpolbul.2023.115636
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  2. Article ; Online: Treatment of medical solid waste using an Air Flow controlled incinerator

    Trinh Van Tuyen / Van Huu Tap / Pham Quang Huy / Trinh Minh Viet / Bui Ha Manh

    Polish Journal of Chemical Technology, Vol 22, Iss 1, Pp 29-

    2020  Volume 34

    Abstract: In this study, air flow controlled incinerator (AFCI) was used to treat medical solid waste in Vietnam. The experiment was conducted with solid waste samples that was weighed approximately 2.1–3.3 kg/h and had moisture content of 2.8–11.7%. The results ... ...

    Abstract In this study, air flow controlled incinerator (AFCI) was used to treat medical solid waste in Vietnam. The experiment was conducted with solid waste samples that was weighed approximately 2.1–3.3 kg/h and had moisture content of 2.8–11.7%. The results showed that an increase in the airflow rate during the drying process accelerated the combustion time by 10–20%, and the optimal airflow rate was 1.1 m/s. The combustion time varied from 0–45 min. The highest temperatures recorded in the drying chamber, carbonisation chamber and combustion chamber after 25–35 min of operation were varied from 195°C, 775°C and 1275°C, respectively. The temperature of the stack was from 33–68°C after the treatment by the wet scrubber using 20% NaOH solution. The combustion capacity was 77.3–87.5%. The experimental results revealed the AFCI process advantages including low operation cost and suitability for treating hazardous waste on a small scale.
    Keywords carbonization ; hazardous solid waste ; incinerator ; Chemistry ; QD1-999
    Subject code 660
    Language English
    Publishing date 2020-03-01T00:00:00Z
    Publisher Sciendo
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Iron-impregnated granular activated carbon for arsenic removal: Application to practical column filters.

    Kalaruban, Mahatheva / Loganathan, Paripurnanda / Nguyen, Tien Vinh / Nur, Tanjina / Hasan Johir, Md Abu / Nguyen, Thi Hai / Trinh, Minh Viet / Vigneswaran, Saravanamuthu

    Journal of environmental management

    2019  Volume 239, Page(s) 235–243

    Abstract: Arsenic is a major drinking water contaminant in many countries causing serious health hazards, and therefore, attempts are being made to remove it so that people have safe drinking water supplies. The effectiveness of arsenic removal from As(V) ... ...

    Abstract Arsenic is a major drinking water contaminant in many countries causing serious health hazards, and therefore, attempts are being made to remove it so that people have safe drinking water supplies. The effectiveness of arsenic removal from As(V) solutions using granular activated carbon (GAC) (zero point of charge (ZPC) pH 3.2) and iron incorporated GAC (GAC-Fe) (ZPC pH 8.0) was studied at 25 ± 1 °C. The batch study confirmed that GAC-Fe had higher Langmuir adsorption capacity at pH 6 (1.43 mg As/g) than GAC (1.01 mg As/g). Adsorption data of GAC-Fe fitted the Freundlich model better than the Langmuir model, thus indicating the presence of heterogeneous adsorption sites. Weber and Morris plots of the kinetic adsorption data suggested intra-particle diffusion into meso and micro pores in GAC. The column adsorption study revealed that 2-4 times larger water volumes can be treated by GAC-Fe than GAC, reducing the arsenic concentration from 100 μg/L to the WHO guideline of 10 μg/L. The volume of water treated increased with a decrease in flow velocity and influent arsenic concentration. The study indicates the high potential of GAC-Fe to remove arsenic from contaminated drinking waters in practical column filters.
    MeSH term(s) Adsorption ; Arsenic ; Charcoal ; Iron ; Water Pollutants, Chemical ; Water Purification
    Chemical Substances Water Pollutants, Chemical ; Charcoal (16291-96-6) ; Iron (E1UOL152H7) ; Arsenic (N712M78A8G)
    Language English
    Publishing date 2019-03-20
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2019.03.053
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    In stock of ZB MED Bonn / Germany

    Z 7556: Show issues

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  4. Article ; Online: Laterite as a low-cost adsorbent in a sustainable decentralized filtration system to remove arsenic from groundwater in Vietnam.

    Nguyen, Thi Hai / Tran, Hai Nguyen / Vu, Hai Anh / Trinh, Minh Viet / Nguyen, Tien Vinh / Loganathan, Paripurnanda / Vigneswaran, Saravanamuthu / Nguyen, Tuan Minh / Trinh, Van Tuyen / Vu, Duc Loi / Nguyen, Thi Hoang Ha

    The Science of the total environment

    2019  Volume 699, Page(s) 134267

    Abstract: In the Red River Delta, Vietnam, arsenic (As) contamination of groundwater is a serious problem where more than seventeen million people are affected. Millions of people in this area are unable to access clean water from the existing centralized water ... ...

    Abstract In the Red River Delta, Vietnam, arsenic (As) contamination of groundwater is a serious problem where more than seventeen million people are affected. Millions of people in this area are unable to access clean water from the existing centralized water treatment systems. They also cannot afford to buy expensive household water filters. Similar dangerous situations exist in many other countries and for this reason there is an urgent need to develop a cost-effective decentralized filtration system using new low-cost adsorbents for removing arsenic. In this study, seven locally available low-cost materials were tested for arsenic removal by conducting batch adsorption experiments. Of these materials, a natural laterite (48.7% Fe
    MeSH term(s) Adsorption ; Arsenic/analysis ; Filtration/economics ; Groundwater ; Vietnam ; Water Pollutants, Chemical/analysis ; Water Purification/methods
    Chemical Substances Water Pollutants, Chemical ; Arsenic (N712M78A8G)
    Language English
    Publishing date 2019-09-05
    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.2019.134267
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 949: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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    Jg. 1995 - 2021: Lesesall (1.OG)
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  5. Article: Laterite as a low-cost adsorbent in a sustainable decentralized filtration system to remove arsenic from groundwater in Vietnam

    Nguyen, Thi Hai / Loganathan, Paripurnanda / Nguyen, Thi Hoang Ha / Nguyen, Tien Vinh / Nguyen, Tuan Minh / Tran, Hai Nguyen / Trinh, Minh Viet / Trinh, Van Tuyen / Vigneswaran, Saravanamuthu / Vu, Duc Loi / Vu, Hai Anh

    Science of the total environment. 2019 Sept. 02,

    2019  

    Abstract: In the Red River Delta, Vietnam, arsenic (As) contamination of groundwater is a serious problem where more than seventeen million people are affected. Millions of people in this area are unable to access clean water from the existing centralized water ... ...

    Abstract In the Red River Delta, Vietnam, arsenic (As) contamination of groundwater is a serious problem where more than seventeen million people are affected. Millions of people in this area are unable to access clean water from the existing centralized water treatment systems. They also cannot afford to buy expensive household water filters. Similar dangerous situations exist in many other countries and for this reason there is an urgent need to develop a cost-effective decentralized filtration system using new low-cost adsorbents for removing arsenic. In this study, seven locally available low-cost materials were tested for arsenic removal by conducting batch adsorption experiments. Of these materials, a natural laterite (48.7% Fe2O3 and 18.2% Al2O3) from Thach That (NLTT) was deemed the most suitable adsorbent based on arsenic removal performance, local availability, stability/low risk and cost (US$ 0.10/kg). Results demonstrated that the adsorption process was less dependent on the solution pH from 2.0 to 10. The coexisting anions competed with As(III) and As(V) in the order, phosphate > silicate > bicarbonate > sulphate > chloride. The adsorption process reached a fast equilibrium at approximately 120–360 min, depending on the initial arsenic concentrations. The Langmuir maximum adsorption capacities of NLTT at 30 °C were 512 μg/g for As(III) and 580 μg/g for As(V), respectively. Thermodynamic study conducted at 10 °C, 30 °C, and 50 °C suggested that the adsorption process of As(III) and As(V) was spontaneous and endothermic in nature. A water filtration system packed with NLTT was tested in a childcare centre in the most disadvantaged community in Ha Nam province, Vietnam, to determine arsenic removal performance in an operation lasting six months. Findings showed that the system reduced total arsenic concentration in groundwater from 122 to 237 μg/L to below the Vietnam drinking water standard of 10 μg/L.
    Keywords adsorbents ; adsorption ; aluminum oxide ; anions ; arsenic ; bicarbonates ; child care centers ; chlorides ; cost effectiveness ; drinking water ; endothermy ; ferric oxide ; filtration ; groundwater ; groundwater contamination ; laterites ; pH ; phosphates ; risk ; river deltas ; silicates ; sulfates ; thermodynamics ; water filters ; water treatment ; Vietnam
    Language English
    Dates of publication 2019-0902
    Publishing place Elsevier B.V.
    Document type Article
    Note Pre-press version
    ZDB-ID 121506-1
    ISSN 1879-1026 ; 0048-9697
    ISSN (online) 1879-1026
    ISSN 0048-9697
    DOI 10.1016/j.scitotenv.2019.134267
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 949: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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    Jg. 1995 - 2021: Lesesall (1.OG)
    ab Jg. 2022: Lesesaal (EG)

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