{"title":"Removal of mercury ion by the moss Pohlia flexuosa","authors":"Mitsuyo Kondoh , Masanori Fukuda , Masayuki Azuma , Hiroshi Ooshima , Jyoji Kato","doi":"10.1016/S0922-338X(98)80061-5","DOIUrl":null,"url":null,"abstract":"<div><p>The moss <em>Pohlia flexuosa</em> was obtained as the protonema from its matured capsules. It was grown by shaking in modified Murashige-Skoog's medium, and the dry weight obtained was 40 mg per 20 ml medium after 15 d. The mature protonema removed Hg<sup>2+</sup> from aqueous solutions. The higher the initial Hg<sup>2+</sup> concentration, the higher the amount of Hg<sup>2+</sup> removed, and the concentration factor, which is an indicator of the ability to remove heavy metals, was 2000 ml/g of dry moss at 50 μg/ml of HgCl<sub>2</sub>. The optimal pH and temperature for Hg<sup>2+</sup> removal were 7.0 and 25°C, respectively. Sodium azide and dinitrophenol at 0.1 mM inhibited Hg<sup>2+</sup> removal up to a relative removal of 81 and 77%, respectively. The importance of two processes, bioaccumulation and adsorption, in the removal of Hg<sup>2+</sup> by this moss is discussed.</p></div>","PeriodicalId":15696,"journal":{"name":"Journal of Fermentation and Bioengineering","volume":"86 2","pages":"Pages 197-201"},"PeriodicalIF":0.0000,"publicationDate":"1998-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0922-338X(98)80061-5","citationCount":"11","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Fermentation and Bioengineering","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0922338X98800615","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 11
Abstract
The moss Pohlia flexuosa was obtained as the protonema from its matured capsules. It was grown by shaking in modified Murashige-Skoog's medium, and the dry weight obtained was 40 mg per 20 ml medium after 15 d. The mature protonema removed Hg2+ from aqueous solutions. The higher the initial Hg2+ concentration, the higher the amount of Hg2+ removed, and the concentration factor, which is an indicator of the ability to remove heavy metals, was 2000 ml/g of dry moss at 50 μg/ml of HgCl2. The optimal pH and temperature for Hg2+ removal were 7.0 and 25°C, respectively. Sodium azide and dinitrophenol at 0.1 mM inhibited Hg2+ removal up to a relative removal of 81 and 77%, respectively. The importance of two processes, bioaccumulation and adsorption, in the removal of Hg2+ by this moss is discussed.