Journal ArticleDOI
Biosorption: critical review of scientific rationale, environmental importance and significance for pollution treatment
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Biosorption is a physico-chemical process and includes such mechanisms as absorption, adsorption, ion exchange, surface complexation and precipitation as discussed by the authors, which has been heralded as a promising biotechnology for pollutant removal from solution, and/or pollutant recovery.Abstract:
Biosorption may be simply defined as the removal of substances from solution by biological material. Such substances can be organic and inorganic, and in gaseous, soluble or insoluble forms. Biosorption is a physico-chemical process and includes such mechanisms as absorption, adsorption, ion exchange, surface complexation and precipitation. Biosorption is a property of both living and dead organisms (and their components) and has been heralded as a promising biotechnology for pollutant removal from solution, and/or pollutant recovery, for a number of years, because of its efficiency, simplicity, analogous operation to conventional ion exchange technology, and availability of biomass. Most biosorption studies have carried out on microbial systems, chiefly bacteria, microalgae and fungi, and with toxic metals and radionuclides, including actinides like uranium and thorium. However, practically all biological material has an affinity for metal species and a considerable amount of other research exists with macroalgae (seaweeds) as well as plant and animal biomass, waste organic sludges, and many other wastes or derived bio-products. While most biosorption research concerns metals and related substances, including radionuclides, the term is now applied to particulates and all manner of organic substances as well. However, despite continuing dramatic increases in published research on biosorption, there has been little or no exploitation in an industrial context. This article critically reviews aspects of biosorption research regarding the benefits, disadvantages, and future potential of biosorption as an industrial process, the rationale, scope and scientific value of biosorption research, and the significance of biosorption in other waste treatment processes and in the environment. Copyright © 2008 Society of Chemical Industryread more
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Book ChapterDOI
Phytofiltration of Metal(loid)-Contaminated Water: The Potential of Native Aquatic Plants
Paulo J.C. Favas,João Pratas,Manoj S. Paul,Santosh Kumar Sarkar,Majeti Narasimha Vara Prasad +4 more
TL;DR: In this article, a general description of the results obtained in native aquatic plant species from Portugal (South Western Europe), for the assessment of the potential for phyto-filtration techniques of multielement contaminated water is presented.
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Efficient removal of dyes from seawater using as biosorbent the dead and living biomass of the microalga Phaeodactylum tricornutum: equilibrium and kinetics studies
TL;DR: In this article, the biomasses, living and dead, from the microalga Phaeodactylum tricornutum were studied to determine their ability to remove three dyes, Methylene Blue, Crystal Violet and Safranin from seawater.
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The Biodegradation of Azo Dyes by Actinobacteria
Azeem Khalid,Shahid Mahmood +1 more
TL;DR: Shinde et al. as discussed by the authors estimated that global production of synthetic dyes is more than 700,000 tonnes and textile sector consumes about 60 % of the total production of dyes.
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Emerging Contaminants in Wastewater: Sources of Contamination, Toxicity, and Removal Approaches
TL;DR: In this article, the authors provide an overview of the fate, behavior, biomonitoring, toxicity of emerging contaminants and their removal approaches and present an efficient and cost-effective treatment technologies that can be applied to industrial scales and effluent treatment plants.
Journal ArticleDOI
Kinetics and equilibrium of surface complexation reactions: the adsorption of polycarboxylic acids on titanium dioxide
TL;DR: In this article, a Fourier transform infrared attenuated total reflectance (FT-IR-ATR) study on the adsorption equilibria of several polycarboxylic acids, citric acid, ethylenediaminetetraacetic acid (EDTA), and triethylenetetramine-TTHA, on titanium dioxide (TiO2) in the concentration range from 3 × 10−7 to 6 × 10 −4 mol, is reported.
References
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Journal ArticleDOI
Review of second-order models for adsorption systems.
TL;DR: An overview of second-order kinetic expressions is described in this paper based on the solid adsorption capacity, which shows that a pseudo-second-order rate expression has been widely applied to the Adsorption of pollutants from aqueous solutions onto adsorbents.
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Biosorption of Heavy Metals
Bohumil Volesky,Z. R. Holan +1 more
TL;DR: The state of the art in the field of biosorption is reviewed, with many references to recent reviews and key individual contributions, and the composition of marine algae polysaccharide structures, which seem instrumental in metal uptake and binding are discussed.
Journal ArticleDOI
A review of potentially low-cost sorbents for heavy metals
TL;DR: The use of low-cost sorbents has been investigated as a replacement for current costly methods of removing heavy metals from solution as mentioned in this paper, where natural materials or waste products from certain industries with a high capacity for heavy metals can be obtained, employed and disposed of with little cost.
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The Chemistry of Soils
TL;DR: The Chemical Composition of Soils as mentioned in this paper is a well-known topic in the field of soil chemistry, and it has been used extensively in the literature to study the properties of soil.
Journal ArticleDOI
A review of the biochemistry of heavy metal biosorption by brown algae
TL;DR: The emphasis is on outlining the biochemical properties of the brown algae that set them apart from other algal biosorbents, including alginate and fucoidan, which are chiefly responsible for heavy metal chelation.