title: Magnetic Pycnoporus sanguineus-loaded alginate composite beads for removing dye from aqueous solutions.
abstract: Dye pollution in wastewater is a severe environmental problem because treating water containing dyes using conventional physical, chemical, and biological treatments is difficult. A conventional process is used to adsorb dyes and filter wastewater. Magnetic filtration is an emerging technology. In this study, magnetic Pycnoporus sanguineus-loaded alginate composite beads were employed to remove a dye solution. A white rot fungus, P. sanguineus, immobilized in alginate beads were used as a biosorbent to remove the dye solution. An alginate polymer could protect P. sanguineus in acidic environments. Superparamagnetic nanomaterials, iron oxide nanoparticles, were combined with alginate gels to form magnetic alginate composites. The magnetic guidability of alginate composites and biocompatibility of iron oxide nanoparticles facilitated the magnetic filtration and separation processes. The fungus cells were immobilized in loaded alginate composites to study the influence of the initial dye concentration and pH on the biosorption capacity. The composite beads could be removed easily post-adsorption by using a magnetic filtration process. When the amount of composite beads was varied, the results of kinetic studies of malachite green adsorption by immobilized cells of P. sanguineus fitted well with the pseudo-second-order model. The results indicated that the magnetic composite beads effectively adsorbed the dye solution from wastewater and were environmentally friendly.
authors.affiliation: Department of Biological Science and Technology, I-Shou University, Kaohsiung City 82445, Taiwan.
authors.forename: Chih-Hui
authors.initials: CH
authors.lastname: Yang
authors.affiliation: Department of Biological Science and Technology, I-Shou University, Kaohsiung City 82445, Taiwan.
authors.forename: Ming-Cheng
authors.initials: MC
authors.lastname: Shih
authors.affiliation: Department of Biological Science and Technology, I-Shou University, Kaohsiung City 82445, Taiwan.
authors.forename: Han-Chen
authors.initials: HC
authors.lastname: Chiu
authors.affiliation: The School of Chinese Medicine for Post-Baccalaureate, I-Shou University, No.8, Yida Road, Jiaosu Village Yanchao District, Kaohsiung City 82445, Taiwan. huangks@isu.edu.tw.
authors.forename: Keng-Shiang
authors.initials: KS
authors.lastname: Huang
mesh_terms: D000464:Alginates / Q000737:chemistry; D001391:Azo Compounds / Q000737:chemistry; D004396:Coloring Agents / Q000302:isolation & purification* / Q000378:metabolism; D005290:Ferric Compounds / Q000737:chemistry; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D053758:Nanoparticles / Q000737:chemistry / Q000382:microbiology; D055494:Pycnoporus / Q000378:metabolism*; D013816:Thermodynamics
chemical_list: D000464:Alginates; D001391:Azo Compounds; D004396:Coloring Agents; D005290:Ferric Compounds; D006603:Hexuronic Acids; C000499:ferric oxide; D020723:Glucuronic Acid