天然凝集剤<i>Moringa oleifera</i>によるカオリナイト粒子の凝集沈殿に水質が与える影響  [in Japanese] Influence of Water Quality on Turbidity Removal by Coagulation with <i>Moringa Oleifera</i> Seeds  [in Japanese]

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Author(s)

    • 鈴木 祐麻 SUZUKI Tasuma
    • 山口大学大学院理工学研究科環境共生系専攻 Department of Environmental Science and Engineering, Graduate School of Science and Engineering, Yamaguchi University
    • 新苗 正和 NIINAE Masakazu
    • 山口大学大学院理工学研究科環境共生系専攻 Department of Environmental Science and Engineering, Graduate School of Science and Engineering, Yamaguchi University
    • 真田 靖瑛 SANADA Yasuaki
    • 山口大学工学部循環環境工学科 Department of Sustainable Environmental Engineering, Faculty of Engineering, Yamaguchi University

Abstract

<i>Moringa oleifera</i> (<i>M. oleifera</i>) is one of the most widely spread <i>Moringa</i> species that grows quickly in the tropical belt. The objective of this study was to investigate the influence of the aqueous pH, initial turbidity of the synthetic kaolin turbid water, ionic strength, and humic substances on the efficiency of the <i>M. oleifera</i> coagulant. The experimental results showed that the coagulation efficiency was significantly enhanced by the presence of divalent cations such as Ca<sup>2+</sup> or Mg<sup>2+</sup>, and slightly enhanced by lowering the aqueous pH from 9.0 to 4.0. It was also found that fulvic acid did not significantly affect the coagulation efficiency, while the initial turbidity and humic acid did. <i>M. oleifera</i> coagulant was effective for synthetic waters of an initial turbidity of 290 NTU. However, turbidity removal was not observed when the initial turbidity was lowered to 45 NTU. The presence of humic acid significantly increased the coagulant dosage required for turbidity removal. These obtained experimental observations were then used to discuss the influence of the water quality on the dominant coagulation mechanism.<br>

Journal

  • Resources Processing

    Resources Processing 59(2), 73-80, 2012

    The Resources Processing Society of Japan

Codes

  • NII Article ID (NAID)
    130001914078
  • NII NACSIS-CAT ID (NCID)
    AA11907992
  • Text Lang
    JPN
  • ISSN
    1348-6012
  • NDL Article ID
    023838569
  • NDL Call No.
    Z17-275
  • Data Source
    NDL  J-STAGE 
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