Removal of 4-Nonylphenol by Carbonaceous Materials Produced from Cottonseed Shell as Organic By-products.

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  • 綿実ハルブラン由来炭素材料による4-ノニルフェノールの除去

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The recycling of organic by-products has attracted much interest. In this paper, techniques for producing carbonaceous adsorbents from an organic by-product and the application to removal of endocrine disruptors are described. Cottonseed shell as an organic by-products was carbonized at 873 K, and the cottonseed shell char was then activated in a rotary kiln with steam at 1123 K for different times to obtain microporous carbons. The specific surface area of the carbons obtained was nearly equal to those of commercial activated carbons. The amount of 4-nonylphenol adsorbed at equilibrium concentration above 20 g/L was high for the carbon with high specific surface area. The adsorption amount at extremely low concentration such as 1 g/L was high for the carbon with small mean pore diameter. Microporous carbons were produced next by air activation from cottonseed shell in the one-step treatment. Although the specific surface area of the carbon was small, the pore size was adequate for adsorbing 4-nonylphenol at low concentration. Therefore 4-nonylphenol could be efficiently removed from aqueous solution.

Journal

  • ENVIRONMENTAL SCIENCE

    ENVIRONMENTAL SCIENCE 13 (5), 580-585, 2000

    SOCIETY OF ENVIRONMENTAL SCIENCE, JAPAN

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