Wastewater Treatment for Biologically Hard Surfactants

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Author(s)

Abstract

The treatment method for wastewater containing surfactant is discussed. The biodegradability of nonionic surfactants such as nonylphenol ethoxylates is low. In addition, it is difficult to treat them by a coagulation process. The adsorption method using activated carbons is quite effective in treating them. Activated carbons effectively adsorb all kinds of surfactants and are especially effective with nonionic surfactant, which have the highest adsorbability. The order of adsorbability of surfactants is as follows: nonionic>cationic>anionic. It has been recently shown that nonylphenol (NP), a biodegradation product of nonylphenol ethoxylates, has endocrine disrupting effects on aquatic life. It is a pressing issue to establish a method to remove NP. The author has examined the adsorbability of 67 endocrine disruptors including NP. The results showed that almost all endocrine disruptors are effectively adsorbed onto activated carbons at quite low concentration. It has been found that alkylphenols with different lengths of alkyl chains have high adsorbability onto activated carbons. Microporous carbons made from various kinds of organic waste, such as used textile products, could be utilized to adsorb endocrine disruptors.

Journal

  • Journal of Oleo Science

    Journal of Oleo Science 51(5), 297-303, 2002-05-01

    Japan Oil Chemists' Society

References:  23

Codes

  • NII Article ID (NAID)
    10008224196
  • NII NACSIS-CAT ID (NCID)
    AA11503337
  • Text Lang
    ENG
  • Article Type
    REV
  • ISSN
    13473352
  • NDL Article ID
    6140668
  • NDL Source Classification
    ZP25(科学技術--化学・化学工業--油脂類)
  • NDL Call No.
    Z54-J571
  • Data Source
    CJP  NDL  J-STAGE 
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