Evaluation of the marine alga Sargassum glaucescens for the adsorption of Zn(II) from aqueous solutions

IF 2 Q3 Environmental Science Water Quality Research Journal of Canada Pub Date : 2014-11-01 DOI:10.2166/WQRJC.2014.006

A. Esmaeili, M. Darvish

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引用次数: 6

Abstract

The objective of this research was to study the efficacy of the marine brown alga Sargassum glaucescens in batch removal of Zn(II) from wastewater and seawater. For these experiments, a dried biomass was used to adsorb Zn(II) from aqueous solutions. The effects of varying pH, biomass weight, retention time and initial concentration of Zn(II) were studied. The maximum efficiency of Zn(II) removal obtained was 90.00%. The experimental adsorption data were fitted to the Freundlich adsorption model. A pseudo-second-order model was found to offer the best analysis of Zn(II) uptake. Kinetic studies showed that a biomass formed of marine-dried S. glaucescens exhibited high biosorption capacity. A solution pH of 5.0 was found to be optimal for adsorption. Results showed that removal of Zn(II), increased to 90.00% with increasing contact time, increasing pH (to 5.0) and decreasing adsorbent amount. The equilibrium adsorption data are fitted to the Freundlich isotherm model and pseudo-second-order kinetic models. Therefore, brown algae Sargassum glaucescens was an economical adsorbent.

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海藻对水溶液中Zn(II)的吸附性能评价

本研究的目的是研究海洋褐藻对废水和海水中Zn(II)的批量去除效果。在这些实验中，干燥的生物质被用来吸附水溶液中的Zn(II)。研究了不同pH、生物量、停留时间和初始浓度对Zn(II)的影响。对Zn(II)的最高去除率为90.00%。实验数据符合Freundlich吸附模型。伪二阶模型对Zn(II)吸收的分析效果最好。动力学研究表明，由海洋干燥的海苔形成的生物质具有较高的生物吸附能力。发现溶液pH为5.0时吸附效果最佳。结果表明，随着接触时间的延长、pH值的增加(至5.0)和吸附剂用量的减少，Zn(II)的去除率提高到90.00%。平衡吸附数据符合Freundlich等温线模型和拟二级动力学模型。因此，褐藻是一种经济的吸附剂。

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来源期刊

Water Quality Research Journal of Canada WATER RESOURCES-

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Water Quality Research Journal publishes peer-reviewed, scholarly articles on the following general subject areas: Impact of current and emerging contaminants on aquatic ecosystems Aquatic ecology (ecohydrology and ecohydraulics, invasive species, biodiversity, and aquatic species at risk) Conservation and protection of aquatic environments Responsible resource development and water quality (mining, forestry, hydropower, oil and gas) Drinking water, wastewater and stormwater treatment technologies and strategies Impacts and solutions of diffuse pollution (urban and agricultural run-off) on water quality Industrial water quality Used water: Reuse and resource recovery Groundwater quality (management, remediation, fracking, legacy contaminants) Assessment of surface and subsurface water quality Regulations, economics, strategies and policies related to water quality Social science issues in relation to water quality Water quality in remote areas Water quality in cold climates The Water Quality Research Journal is a quarterly publication. It is a forum for original research dealing with the aquatic environment, and should report new and significant findings that advance the understanding of the field. Critical review articles are especially encouraged.