国立研究開発法人 国際農林水産業研究センター | JIRCAS

Characteristics of the Adsorption of Dissolved Organic Matter by Charcoals Carbonized at Different Temperatures

JARQ : Japan Agricultural Research Quarterly
ISSN
00213551
書誌レコードID(総合目録DB)
AA0068709X
本文フルテキスト

We investigated the adsorptive volume and rate, adsorption isotherm, and the pH dependence of charcoals obtained from carbonizing cedar (Cryptomeria japonica D. Don) wood chips at various temperatures; these charcoals were used to remove dissolved organic matter (DOM) that was eluted from ricestraw. In order to confirm the adsorption characteristics, three experiments were carried out in the laboratory. The adsorption characteristics were estimated by determining the total organic carbon (TOC) concentration, adsorption isotherm and the pH in solutions. Results showed that the trend of DOM adsorption effect by charcoals was categorized into two groups: group-1 (charcoals carbonized at less than 750°C) and group-2 (charcoals carbonized at more than 850°C). Group-2 adsorbed a greater amount of DOM and at a more rapid rate than group-1. The adsorption isotherm for group-2 followed the Freundlich model. In particular, the Freundlich constants, K and 1/N, for the charcoal carbonized at 1,050°C indicated that this charcoal had higher adsorption volume and adsorption intensity for DOM than other charcoals. Furthermore, this charcoal adsorbed TOC irrespective of the initial pH value in sample water. This indicated that charcoals carbonized at 1,050°C could change the pH value of the water contaminated with acid to neutral.

刊行年月2007-07-01
作成者MIURA AsaSHIRATANI EisakuYOSHINAGA IkuoHITOMI TadayoshiHAMADA KojiTAKAKI Kyoji
著者キーワード

cedar wood

Freundlich isotherm

pH dependence

rice-straw water

公開者Japan International Research Center for Agricultural Sciences
データ作成日2007-07-01
国立情報学研究所メタデータ主題語彙集(資源タイプ)Journal Article
41
3
開始ページ211
終了ページ217
DOI10.6090/jarq.41.211
権利Japan International Research Center for Agricultural Sciences
言語eng