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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Journal ArticleDOI
Facile synthesis of graphene oxide-silver nanocomposite for decontamination of water from multiple pollutants by adsorption, catalysis and antibacterial activity.
Hina Naeem,Muhammad Ajmal,Raheela Beenish Qureshi,Sedra Tul Muntha,Muhammad Farooq,Muhammad Siddiq +5 more
TL;DR: The prepared nanocomposite was found to have potential to adsorb multiple pollutants all together as well as to catalyze the simultaneous reduction of a mixture of dyes and 2-NA and an additional advantage of the GO-Ag nanocomPOSite was its antibacterial activity acquired to the presence of Ag nanoparticles.
Journal ArticleDOI
Accumulation of uranium by aquatic plants in field conditions: prospects for phytoremediation.
TL;DR: In general submerged plants exhibited higher U content followed by rooted emergent and free floating species, and F. antipyretica and Callitrichaceae members seem to be promising candidates for the development of phytofiltration methodologies based on U accumulation, abundance and biomass production.
Journal ArticleDOI
Adsorption and degradation in the removal of nonylphenol from water by cells immobilized on biochar
TL;DR: Results showed that cells immobilized on different biochar had different NP removal effects, and cells immobilization on bamboo charcoal (I-BC) was better, indicating that the long-term NP removal effect is more dependent on biodegradation.
Journal ArticleDOI
Uranium accumulation by aquatic plants from uranium-contaminated water in central portugal
TL;DR: It is observed that Callitriche stagnalis, Lemna minor, and Fontinalis antipyretica, which grow in the uraniferous geochemical province of Central Portugal, have been able to accumulate significant amounts of U.
Journal ArticleDOI
Mercury(II) removal from aqueous solution by sorption onto alginate, pectate and polygalacturonate calcium gel beads. A kinetic and speciation based equilibrium study
TL;DR: Gel beads of calcium alginate, pectate and polygalacturonate salts have been tested as sorbent materials for mercury(II) removal from aqueous solutions as mentioned in this paper.
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.
Book
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.
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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.
Book
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.