caa a22 4500 378931679 CHVBK 20180305123631.0 cr unu---uuuuu 161128e20040101xx s 000 0 eng 10.1351/pac200476040801 doi (NATIONALLICENCE)gruyter-10.1351/pac200476040801 Use of phytofiltration technologies in the removal of heavy metals: A review [Elektronische Daten] [J. L. Gardea-Torresdey, G. de la Rosa, J. R. Peralta-Videa] Biosorption is a relatively new process that has proven very promising in the removal of contaminants from aqueous effluents. Microorganisms as well as plant- and animal-derived materials have been used as biosorbents by many researchers. Biomaterial immobilization and chemical modification improves the adsorption capacity and stability of biosorbents. Biosorption experiments over Cu(II), Cd(II), Pb(II), Cr(III), and Ni(II) demonstrated that biomass Cu(II) adsorption ranged from 8.09 to 45.9 mg g−1, while Cd(II) and Cr(VI) adsorption ranged from 0.4 to 10.8 mg g−1 and from 1.47 to 119 mg g−1, respectively. Mechanisms involved in the biosorption process include chemisorption, complexation, surface and pore adsorption-complexation, ion exchange, microprecipitation, hydroxide condensation onto the biosurface, and surface adsorption. Chemical modification and spectroscopic studies have shown that cellular components including carboxyl, hydroxyl, sulfate, sulfhydryl, phosphate, amino, amide, imine, and imidazol moieties have metal binding properties and are therefore the functional groups in the biomass. Column studies using support matrices for biomass immobilization such as silica, agar, polyacrilamide, polysulfone, alginates, cellulase, and different cross-linking agents have been performed to improve the biomass adsorption capacity and reusability. In this review, the salient features of plant-derived materials are highlighted as potential phytofiltration sources in the recovery of toxic heavy and precious metals. © 2013 Walter de Gruyter GmbH, Berlin/Boston Gardea-Torresdey J. L. Chemistry Department and Environmental Science and Engineering Ph.D. Program, University of Texas at El Paso, El Paso, TX 79968, USA aut de la Rosa G. Chemistry Department and Environmental Science and Engineering Ph.D. Program, University of Texas at El Paso, El Paso, TX 79968, USA aut Peralta-Videa J. R. Chemistry Department and Environmental Science and Engineering Ph.D. Program, University of Texas at El Paso, El Paso, TX 79968, USA aut Pure and Applied Chemistry De Gruyter 76/4(2004-01-01), 801-813 0033-4545 76:4<801 2004 76 pac https://doi.org/10.1351/pac200476040801 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1351/pac200476040801 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gardea-Torresdey J. L. Chemistry Department and Environmental Science and Engineering Ph.D. Program, University of Texas at El Paso, El Paso, TX 79968, USA aut NATIONALLICENCE 700 1- de la Rosa G. Chemistry Department and Environmental Science and Engineering Ph.D. Program, University of Texas at El Paso, El Paso, TX 79968, USA aut NATIONALLICENCE 700 1- Peralta-Videa J. R. Chemistry Department and Environmental Science and Engineering Ph.D. Program, University of Texas at El Paso, El Paso, TX 79968, USA aut NATIONALLICENCE 773 0- Pure and Applied Chemistry De Gruyter 76/4(2004-01-01), 801-813 0033-4545 76:4<801 2004 76 pac CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter