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Removal of Arsenate from Contaminated Water via Combined Addition of Magnesium-Based and Calcium-Based Adsorbents

Author

Listed:
  • Hajime Sugita

    (Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Central 7, 1-1-1 Higashi, Tsukuba 305-8567, Japan)

  • Terumi Oguma

    (Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Central 7, 1-1-1 Higashi, Tsukuba 305-8567, Japan)

  • Junko Hara

    (Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Central 7, 1-1-1 Higashi, Tsukuba 305-8567, Japan)

  • Ming Zhang

    (Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Central 7, 1-1-1 Higashi, Tsukuba 305-8567, Japan
    Deceased author 16 July 2022.)

  • Yoshishige Kawabe

    (Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), Central 7, 1-1-1 Higashi, Tsukuba 305-8567, Japan)

Abstract

The effects of the combined addition of Mg- and Ca-based adsorbents (MgO, Mg(OH) 2 , MgCO 3 , CaO, Ca(OH) 2 , and CaCO 3 ) were systematically tested for improving arsenic-removal performance and inhibiting the leaching of base material components from the adsorbent. Arsenic-removal tests were conducted with each single type or combination of two types of adsorbents. Results obtained after the combined-addition tests were compared with those obtained from the single-addition test with each adsorbent. The arsenic-removal performance improved in most combined additions but decreased in certain combined additions of MgO or Mg(OH) 2 with Ca-based adsorbents. The arsenic-removal performance of the combined addition of MgCO 3 and Ca(OH) 2 was the highest. The combination of Mg-based adsorbents with CaO or Ca(OH) 2 inhibited Mg-leaching, whereas that of CaO or Ca(OH) 2 with MgCO 3 inhibited Ca-leaching. Improvement in arsenic-removal performance for the combination of MgCO 3 with CaO or Ca(OH) 2 was caused by the incorporation and co-precipitation with arsenic when Mg(OH) 2 and CaCO 3 were produced. MgCO 3 -Ca(OH) 2 and MgCO 3 -CaO are recommended for both arsenic removal and environmental adsorbent stability that can be effectively applied over a wide range of arsenic concentrations.

Suggested Citation

  • Hajime Sugita & Terumi Oguma & Junko Hara & Ming Zhang & Yoshishige Kawabe, 2023. "Removal of Arsenate from Contaminated Water via Combined Addition of Magnesium-Based and Calcium-Based Adsorbents," Sustainability, MDPI, vol. 15(5), pages 1-22, March.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:5:p:4689-:d:1089397
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    References listed on IDEAS

    as
    1. Senanayake, Nari & Mukherji, Aditi, 2014. "Irrigating with arsenic contaminated groundwater in West Bengal and Bangladesh: A review of interventions for mitigating adverse health and crop outcomes," Agricultural Water Management, Elsevier, vol. 135(C), pages 90-99.
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