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Heavy Metal Accumulation in Water, Soil, and Plants of Municipal Solid Waste Landfill in Vientiane, Laos

Author

Listed:
  • Noudeng Vongdala

    (Graduate school for International Development and Cooperation, Hiroshima University, Hiroshima 739-8529, Japan)

  • Hoang-Dung Tran

    (Nguyen Tat Thanh University, Ho Chi Minh City 702000, Vietnam)

  • Tran Dang Xuan

    (Graduate school for International Development and Cooperation, Hiroshima University, Hiroshima 739-8529, Japan)

  • Rolf Teschke

    (Department of Internal Medicine II, Division of Gastroenterology and Hepatology, Klinikum Hanau, D-63450 Hanau, Germany)

  • Tran Dang Khanh

    (Agricultural Genetics Institute, Pham Van Dong, Tu Liem, Hanoi 123000, Vietnam)

Abstract

The municipal solid waste (MSW) landfill in Vientiane, Laos, which receives > 300 tons of waste daily, of which approximately 50% is organic matter, has caused serious environmental problems. This study was conducted to investigate the accumulated levels of heavy metals (HMs) (cadmium (Cd), chromium (Cr), copper (Cu), nickel (Ni), lead (Pb), and zinc (Zn)) in water (surface and groundwater), soil, and plants between dry and wet seasons according to the standards of the Agreement on the National Environmental Standards of Laos (ANESs), Dutch Pollutant Standards (DPSs), and the World Health Organization (WHO), respectively. Although no impact of pollution on the surface water was observed, the levels of Cr and Pb in the groundwater significantly exceeded the basics of ANESs and WHO in both seasons. The pollution caused by Cd and Cu reached the eco-toxicological risk level in the landfill soils and its vicinity. The vegetable Ipomoea aquatica , which is consumed by the nearby villagers, was seriously contaminated by Cr, Pb, Cu, and Zn, as the accumulation of these toxic metals was elevated to much greater levels as compared to the WHO standards. For the grass Pennisetum purpureum (elephant grass), the quantities of HMs in all plant parts were extreme, perhaps due to the deeper growth of its rhizome than I. aquatica . This study is the first to warn of serious HM pollution occurring in the water, soil, and plants in the MSW landfill of Vientiane, Laos, which requires urgent phytoremediation. The indication of what sources from the MSW principally cause the pollution of HMs is needed to help reduce the toxicological risks on Lao residents and the environment in Vientiane as well.

Suggested Citation

  • Noudeng Vongdala & Hoang-Dung Tran & Tran Dang Xuan & Rolf Teschke & Tran Dang Khanh, 2018. "Heavy Metal Accumulation in Water, Soil, and Plants of Municipal Solid Waste Landfill in Vientiane, Laos," IJERPH, MDPI, vol. 16(1), pages 1-13, December.
    • Handle: RePEc:gam:jijerp:v:16:y:2018:i:1:p:22-:d:192406
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    References listed on IDEAS

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    1. Nachalida Yukalang & Beverley Clarke & Kirstin Ross, 2017. "Barriers to Effective Municipal Solid Waste Management in a Rapidly Urbanizing Area in Thailand," IJERPH, MDPI, vol. 14(9), pages 1-23, September.
    2. Olatunde S. Durowoju & John O. Odiyo & Georges-Ivo E. Ekosse, 2016. "Variations of Heavy Metals from Geothermal Spring to Surrounding Soil and Mangifera Indica –Siloam Village, Limpopo Province," Sustainability, MDPI, vol. 8(1), pages 1-12, January.
    3. Petra Schneider & Le Hung Anh & Jörg Wagner & Jan Reichenbach & Anja Hebner, 2017. "Solid Waste Management in Ho Chi Minh City, Vietnam: Moving towards a Circular Economy?," Sustainability, MDPI, vol. 9(2), pages 1-20, February.
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