Characteristics of the Adsorption of Dissolved Organic Matter by Charcoals Carbonized at Different Temperatures
ISSN | 00213551 |
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書誌レコードID(総合目録DB) | AA0068709X |
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.
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作成者 | MIURA Asa SHIRATANI Eisaku YOSHINAGA Ikuo HITOMI Tadayoshi HAMADA Koji TAKAKI 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 |
オンライン掲載日 | |
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 |
巻 | 41 |
号 | 3 |
開始ページ | 211 |
終了ページ | 217 |
DOI | 10.6090/jarq.41.211 |
権利 | Japan International Research Center for Agricultural Sciences |
言語 | eng |