직/편성물 염색

Dye removal from wastewater by adsorption on 'waste'Fe(Ⅲ)/Cr(Ⅲ) hydroxide

  • 출판일1995.10
  • 저자
  • 서지사항
  • 등록일 2016.11.02
  • 조회수 268
Agricultural and industrial solid wastes can be recycled as nonconventional adsorbents if they are inert and harnless to reduce the cost of the wastewater treatments. Waste Fe(Ⅲ)/Cr(Ⅲ) hydroxide, generated in the treatment of Cr(Ⅳ) bearing wastewaters in a fertilizer industry, was used for the adsorption of Congo red (direct dye) from aqueous solution. The parameters studied include agitation time, initial dye concentration, pH and adsorbent dosage. Removal of the dye was maximum, 91％ at pH 3. Low desorption (9％) with water seems to indicate that the dye is mostly held by the adsorbent through ion-exchange.
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