Abstract Chitosan biological macromolecule is a versatile polymer; chemical modification has been carried out that lead to the formation of chitosan grafted polymers composites (Chito-g-PC). We proposed synthesis six various Chito-g-PC as sorbents for toxic dyes. A novel graft copolymerization method based on radical polymerization with vinyl monomer like acrylic acid, acrylamide, N -isopropyla...

Contamination of ecosystems with industrial and population advances has caused numerous problems to the environment human health, as inappropriate disposal effluents contaminated by potentially toxic metals impairs soil groundwater. A low-cost efficient alternative for removal these is biosorption which can be performed through biosorbents such açai pit residue (Euterpe Oleracea Mart.). This wo...

In this work, locally available tea wastes were used as precursors for the development of cost-effective bio-sorbent materials heavy metal removal from wastewater. Chemical and thermal treatments to prepare magnetic/non-magnetic waste-based adsorbents discussed correlated their properties with corresponding Cr(VI) adsorption capacity. These bio-sorbents thoroughly characterized by FT-IR, PXRD, ...

This work aims to characterize biosorbent materials based on seaweed present on the littoral of Baixada Santista (São Paulo state, Brazil), and test their adsorption properties to remove heavy metal cations (Co+2, Pb+2, and Cd+2) in water, aiming its future application situ remediations degraded ecosystems. Three types of nat...

The biosorption of As(V) from aqueous solutions by pine sawdust chemically modified with iron in batch systems was investigated. The loading process of Fe in this biomaterial was achieved by hydrolysis of two different ferric salts. This modification of sawdust is an attempt to improve As(V) biosorption for practical applications. The kinetics and maximum biosorption capacities of the unmodifie...

Industrialization and urbanization have led to the release of increasing amounts of heavy metals into the environment. Metal ion contamination of drinking water and waste water is a serious ongoing problem especially with high toxic metals such as lead and cadmium and less toxic metals such as copper and zinc. Several biological materials have attracted many researchers and scientists as they o...

The biosorption of hexavalent chromium from aqueous solutions by Opuntia cladodes and ectodermis from cactus fruits was investigated. Both types of biomass are considered low-cost, natural, and ecofriendly biosorbents. Batch experiments were carried out to determine Cr(VI) biosorption capacity and the efficiency of the biosorption process under different pH, initial Cr(VI) concentration, and so...

The ability of orange peels (OP) and almond peels (AP) as adsorbents for the removal of a dyestuff, namely methylene blue (MB) from aqueous solutions has been studied. After their characterization by different techniques (elemental analysis, biochemical analysis, IR spectroscopy, thermogravimetric analysis, scanning electron microscopy, mercury porosimetry), adsorption kinetics of the dye have ...

Pollution of the environment with heavy metals requires finding solutions to eliminate them from aqueous flows. The current trends aim at exploiting advantages adsorption operation, by using some low-cost sorbents agricultural waste biomass, and good retention capacity metal ions. In this context, it is important provide tools that allow modeling optimization process, in order transpose process...