title: Magnetically modified biochar for organic xenobiotics removal.
abstract: Large amounts of biochar are produced worldwide for potential agricultural applications. However, this material can also be used as an efficient biosorbent for xenobiotics removal. In this work, biochar was magnetically modified using microwave-synthesized magnetic iron oxide particles. This new type of a magnetically responsive biocomposite material can be easily separated by means of strong permanent magnets. Magnetic biochar has been used as an inexpensive magnetic adsorbent for the removal of water-soluble dyes. Five dyes (malachite green, methyl green, Bismarck brown Y, acridine orange and Nile blue A) were used to study the adsorption process. The dyes adsorption could be usually described with the Langmuir isotherm. The maximum adsorption capacities reached the value 137 mg of dye per g of dried magnetically modified biochar for Bismarck brown Y. The adsorption processes followed the pseudo-second-order kinetic model and the thermodynamic studies indicated spontaneous and endothermic adsorption. Extremely simple magnetic modification of biochar resulted in the formation of a new, promising adsorbent suggested for selected xenobiotics removal.
authors.affiliation: Department of Nanobiotechnology, Biology Centre, ISB, ASCR, Na Sádkách 7, České Budějovice 370 05, Czech Republic E-mail: ivosaf@yahoo.com; Regional Centre of Advanced Technologies and Materials, Palacký University, Šlechtitelů 27, Olomouc 783 71, Czech Republic; Global Change Research Institute, ASCR, Na Sádkách 7, České Budějovice 370 05, Czech Republic.
authors.forename: Ivo
authors.initials: I
authors.lastname: Šafařík
authors.affiliation: Global Change Research Institute, ASCR, Na Sádkách 7, České Budějovice 370 05, Czech Republic.
authors.forename: Zdenka
authors.initials: Z
authors.lastname: Maděrová
authors.affiliation: Regional Centre of Advanced Technologies and Materials, Palacký University, Šlechtitelů 27, Olomouc 783 71, Czech Republic.
authors.forename: Kristýna
authors.initials: K
authors.lastname: Pospíšková
authors.affiliation: Ithaka Institute for Carbon Strategies, Ancienne Eglise 9, Arbaz CH-1974, Switzerland.
authors.forename: Hans-Peter
authors.initials: HP
authors.lastname: Schmidt
authors.affiliation: Global Change Research Institute, ASCR, Na Sádkách 7, České Budějovice 370 05, Czech Republic.
authors.forename: Eva
authors.initials: E
authors.lastname: Baldíková
authors.affiliation: Regional Centre of Advanced Technologies and Materials, Palacký University, Šlechtitelů 27, Olomouc 783 71, Czech Republic.
authors.forename: Jan
authors.initials: J
authors.lastname: Filip
authors.affiliation: Regional Centre of Advanced Technologies and Materials, Palacký University, Šlechtitelů 27, Olomouc 783 71, Czech Republic.
authors.forename: Michal
authors.initials: M
authors.lastname: Křížek
authors.affiliation: Regional Centre of Advanced Technologies and Materials, Palacký University, Šlechtitelů 27, Olomouc 783 71, Czech Republic.
authors.forename: Ondřej
authors.initials: O
authors.lastname: Malina
authors.affiliation: Department of Nanobiotechnology, Biology Centre, ISB, ASCR, Na Sádkách 7, České Budějovice 370 05, Czech Republic E-mail: ivosaf@yahoo.com; Global Change Research Institute, ASCR, Na Sádkách 7, České Budějovice 370 05, Czech Republic.
authors.forename: Mirka
authors.initials: M
authors.lastname: Šafaříková
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry; D007700:Kinetics; D008280:Magnetics; D013816:Thermodynamics; D014867:Water; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods; D015262:Xenobiotics / Q000737:chemistry*
chemical_list: D004396:Coloring Agents; D014874:Water Pollutants, Chemical; D015262:Xenobiotics; C540010:biochar; D014867:Water; D002606:Charcoal