Basic study of coffee grounds availability

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  • コーヒー豆滓の有効利用についての基礎検討
  • コーヒー豆滓の有効利用についての基礎検討 : 六価クロム吸着能について
  • コーヒーマメシ ノ ユウコウ リヨウ ニ ツイテ ノ キソ ケントウ : ロクカ クロム キュウチャクノウ ニ ツイテ
  • - 六価クロム吸着能について -
  • - Adsorption ability of hexavalent chromium ion -

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Abstract

Coffee grounds is used for biomass such as solid fuel or the manure, however most residue material is disposed of as waste. In this paper, we evaluated an ability for metal ion (hexavalent chromium ion) adsorption of coffee grounds. This ion is emitted by a chromate treated metal product, and it shows cytotoxic substances. As a result of experiments, the coloration ingredient from coffee grounds makes analysis difficult and grounds needed bleaching and re-boiling treatment before adsorption test. Decolored grounds adsorbed hexavalent chromium ion strongly and treated water was able to achieve a discharge standard.

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