Effect of chemical modification of algal carboxyl groups on metal ion binding
The use of non-living algal biomass for the extraction of toxic metal ions from wastewaters and mining effluents is reviewed. Acidic methanol was used to esterify the carboxyl groups of 5 different algal biomasses. The extent of carboxyl group modification was monitored by the analysis of methanol r...
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| Veröffentlicht in: | Environmental science & technology 1990-09, Vol.24 (9), p.1372-1378 |
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| container_title | Environmental science & technology |
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| creator | Gardea-Torresdey, Jorge L Becker-Hapak, Michelle K Hosea, James M Darnall, Dennis W |
| description | The use of non-living algal biomass for the extraction of toxic metal ions from wastewaters and mining effluents is reviewed. Acidic methanol was used to esterify the carboxyl groups of 5 different algal biomasses. The extent of carboxyl group modification was monitored by the analysis of methanol released after base hydrolysis of the esterified carboxyls, and the effects of esterification on metal ion binding to the biomass was investigated. Modified biomasses showed major decreases in the binding of copper(II) and aluminium(III), though the decrease varied among algal species. Gold(III) binding capacity slightly increased, indicating that carboxyl groups were responsible for a significant portion of copper(II) and aluminium(III) binding but inhibited the binding of gold(III). |
| doi_str_mv | 10.1021/es00079a011 |
| format | Article |
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Acidic methanol was used to esterify the carboxyl groups of 5 different algal biomasses. The extent of carboxyl group modification was monitored by the analysis of methanol released after base hydrolysis of the esterified carboxyls, and the effects of esterification on metal ion binding to the biomass was investigated. Modified biomasses showed major decreases in the binding of copper(II) and aluminium(III), though the decrease varied among algal species. 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Sci. Technol</addtitle><description>The use of non-living algal biomass for the extraction of toxic metal ions from wastewaters and mining effluents is reviewed. Acidic methanol was used to esterify the carboxyl groups of 5 different algal biomasses. The extent of carboxyl group modification was monitored by the analysis of methanol released after base hydrolysis of the esterified carboxyls, and the effects of esterification on metal ion binding to the biomass was investigated. Modified biomasses showed major decreases in the binding of copper(II) and aluminium(III), though the decrease varied among algal species. 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Sci. Technol</addtitle><date>1990-09-01</date><risdate>1990</risdate><volume>24</volume><issue>9</issue><spage>1372</spage><epage>1378</epage><pages>1372-1378</pages><issn>0013-936X</issn><eissn>1520-5851</eissn><coden>ESTHAG</coden><abstract>The use of non-living algal biomass for the extraction of toxic metal ions from wastewaters and mining effluents is reviewed. Acidic methanol was used to esterify the carboxyl groups of 5 different algal biomasses. The extent of carboxyl group modification was monitored by the analysis of methanol released after base hydrolysis of the esterified carboxyls, and the effects of esterification on metal ion binding to the biomass was investigated. Modified biomasses showed major decreases in the binding of copper(II) and aluminium(III), though the decrease varied among algal species. Gold(III) binding capacity slightly increased, indicating that carboxyl groups were responsible for a significant portion of copper(II) and aluminium(III) binding but inhibited the binding of gold(III).</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><doi>10.1021/es00079a011</doi><tpages>7</tpages></addata></record> |
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| ispartof | Environmental science & technology, 1990-09, Vol.24 (9), p.1372-1378 |
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| source | ACS Publications |
| subjects | AGUAS RESIDUALES ALCOHOLES ALCOHOLS ALCOOL ALGAE ALGUE Bioinorganic chemistry BIOMASA BIOMASS BIOMASSE CHEMICALS Chemistry EAU USEE Exact sciences and technology EXTRACCION EXTRACTION Inorganic chemistry and origins of life ION IONES IONS METAL METALES METALS PRODUCTOS QUIMICOS PRODUIT CHIMIQUE SUBSTANCE TOXIQUE SUBSTANCIAS TOXICAS TOXIC SUBSTANCES TREATMENT WASTEWATER |
| title | Effect of chemical modification of algal carboxyl groups on metal ion binding |
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