Abstract
Although biodiesel oil extracted from microalgae attracts much attention as one of the most promising green energies, its high production cost is a big problem, impeding its extensive use. In order to lower the production cost, the effective use of microalgal residue after extracting biofuel was investigated as a feed material of functional materials. In the present work, a new adsorbent for silver(I) was prepared by immobilizing functional groups of polyethylene-polyamine or dithiooxamide, which exhibita high affinity for soft Lewis acids such as silver(I) ions. Their adsorption behaviors for silver(I) were investigated from aqueous nitrate and acidothiourea media. The effects of the concentrations of nitrate and thiourea, as well as of sulfuric acid, were qualitatively interpreted. From the study of adsorption isotherms on these gels, they were found to exhibita higher adsorption capacity than the majority of those reported to date.
Highlights
In the coming years, biodiesel oils extracted from microalgae are expected to become a new environmentally friendly alternative energy source to fossil fuels, such as petroleum and coal, since such a diverse group of photosynthetic plants exhibits a rapid growth rate and significantly high oil content, as well as a carbon dioxide sequestration benefit [1,2,3]
Ag(I) from varying concentrations of nitric acid solution on PEI‐microalgal residue (MAR) and DTO‐MAR gels, in both cases, which may be attributed to the formation of a nitrate complex of Ag(I) in the aqueous respectively
For the adsorption on DTO-MAR gel, the adsorption decreases with an increasing concentration of sulfuric acid in the low
Summary
Biodiesel oils extracted from microalgae are expected to become a new environmentally friendly alternative energy source to fossil fuels, such as petroleum and coal, since such a diverse group of photosynthetic plants exhibits a rapid growth rate and significantly high oil content, as well as a carbon dioxide sequestration benefit [1,2,3]. Ag(I) from varying concentrations of nitric acid solution on PEI-MAR and DTO-MAR gels, respectively. Ag(I) from varying concentrations of nitric acid solution on PEI‐MAR and DTO‐MAR gels, in both cases, which may be attributed to the formation of a nitrate complex of Ag(I) in the aqueous respectively.
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