title: Combined performance of biochar sorption and magnetic separation processes for treatment of chromium-contained electroplating wastewater.
abstract: Magnetic biochar was prepared with eucalyptus leaf residue remained after essential oil being extracted. Batch experiments were conducted to examine the capacity of the magnetic biochar to remove Cr (VI) from electroplating wastewater and to be separated by an external magnetic field. The results show that the initial solution pH plays an important role on both sorption and separation. The removal rates of Cr (VI), total Cr, Cu (II), and Ni (II) were 97.11%, 97.63%, 100% and 100%, respectively. The turbidity of the sorption-treated solution was reduced to 21.8NTU from 4075NTU after 10min magnetic separation. The study also confirms that the magnetic biochar still retains the original magnetic separation performance after the sorption process.
authors.affiliation: College of Environment Science and Engineering, Guangxi University, Nanning 530004, China.
authors.forename: Sheng-ye
authors.initials: SY
authors.lastname: Wang
authors.affiliation: College of Environment Science and Engineering, Guangxi University, Nanning 530004, China. Electronic address: tangyankui101@163.com.
authors.forename: Yan-kui
authors.initials: YK
authors.lastname: Tang
authors.affiliation: College of Environment Science and Engineering, Guangxi University, Nanning 530004, China.
authors.forename: Kun
authors.initials: K
authors.lastname: Li
authors.affiliation: College of Environment Science and Engineering, Guangxi University, Nanning 530004, China.
authors.forename: Ya-yuan
authors.initials: YY
authors.lastname: Mo
authors.affiliation: College of Environment Science and Engineering, Guangxi University, Nanning 530004, China.
authors.forename: Hao-feng
authors.initials: HF
authors.lastname: Li
authors.affiliation: Department of Environmental Protection of Guangxi Zhuang Autonomous Region, Naning 530028, China.
authors.forename: Zhan-qi
authors.initials: ZQ
authors.lastname: Gu
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D002857:Chromium / Q000302:isolation & purification*; D004595:Electroplating / Q000379:methods*; D005052:Eucalyptus / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007477:Ions; D060328:Magnetic Phenomena; D060306:Magnetometry; D018515:Plant Leaves / Q000737:chemistry; D012996:Solutions; D013696:Temperature; D013997:Time Factors; D014732:Vibration; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D002606:Charcoal; D002857:Chromium; D007477:Ions; D012996:Solutions; D062065:Wastewater; D014874:Water Pollutants, Chemical; C540010:biochar
keywords: Electroplating wastewater; Leaf residue; Magnetic biochar; Separation; Sorption