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Biosorption of lead ion by chemically-modified biomass of marine brown [An article from: Chemosphere]
Description
This digital document is a journal article from Chemosphere, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
In this paper, marine brown algae Laminaria japonica was chemically-modified by crosslinking with epichlorohydrin (EC"1, EC"2), or oxidizing by potassium permanganate (PC), or only washed by distilled water (DW). They were used for equilibrium sorption uptake studies with lead. As can be seen from the experimental results that biosorption equilibriums were rapidly established in about 2h. The lead adsorption was strictly pH dependent, and maximum removal of lead on biosorbents were observed at pH 5.3. The effects solid/liquid ratio on lead biosorption was also investigated. The maximum lead uptakes were 1.67mmolg^-^1, 1.62mmolg^-^1, 1.54mmolg^-^1 and 1.21mmolg^-^1, respectively for EC"1, EC"2, PC and DW. The order of maximum lead uptakes for different pretreated and raw alga was EC"1>EC"2>PC>DW. A comparison of different isotherm models revealed that the combination of Langmuir and Freundlich (L-F) isotherm model fitted the experimental data best.
Description:
In this paper, marine brown algae Laminaria japonica was chemically-modified by crosslinking with epichlorohydrin (EC"1, EC"2), or oxidizing by potassium permanganate (PC), or only washed by distilled water (DW). They were used for equilibrium sorption uptake studies with lead. As can be seen from the experimental results that biosorption equilibriums were rapidly established in about 2h. The lead adsorption was strictly pH dependent, and maximum removal of lead on biosorbents were observed at pH 5.3. The effects solid/liquid ratio on lead biosorption was also investigated. The maximum lead uptakes were 1.67mmolg^-^1, 1.62mmolg^-^1, 1.54mmolg^-^1 and 1.21mmolg^-^1, respectively for EC"1, EC"2, PC and DW. The order of maximum lead uptakes for different pretreated and raw alga was EC"1>EC"2>PC>DW. A comparison of different isotherm models revealed that the combination of Langmuir and Freundlich (L-F) isotherm model fitted the experimental data best.
