title: Utilization of biochar sorbents for Cd²⁺, Zn²⁺, and Cu²⁺ ions separation from aqueous solutions: comparative study.
abstract: The objective of this study was to study the utilization of two different woody-derived biochars for Cd(2+), Zn(2+), and Cu(2+) ions separation from aqueous solutions. Physicochemical characterization confirmed the main differences in sorbent surface area and cation-exchange capacity. The maximum cadmium, zinc, and copper sorption capacities were 1.99, 0.97, and 2.50 mg g(-1) for biochar (BC) A; 7.80, 2.23, and 3.65 mg g(-1) for BC B. Sorption processes can be affected by time and pH. The most of sorbed cadmium and zinc were bound on exchangeable fractions and copper oxidizable fractions. Chemical modification and FT-IR analyses confirmed the crucial roles of hydroxyl and mainly carboxyl functional groups in sorption processes of Cd(2+), Zn(2+), and Cu(2+) ions by BC A and BC B. The garden wood rests with leaf mass-derived biochar can be utilized as an effective sorbent for bivalent ions.
authors.affiliation: Department of Ecochemistry and Radioecology, University of SS. Cyril and Methodius, J. Herdu 2, Trnava, 917 01, Slovak Republic, fristak.vladimir.jr@gmail.com.
authors.forename: Vladimír
authors.initials: V
authors.lastname: Frišták
authors.forename: Martin
authors.initials: M
authors.lastname: Pipíška
authors.forename: Juraj
authors.initials: J
authors.lastname: Lesný
authors.forename: Gerhard
authors.initials: G
authors.lastname: Soja
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Friesl-Hanl
authors.forename: Alena
authors.initials: A
authors.lastname: Packová
mesh_terms: D000327:Adsorption; D002104:Cadmium / Q000032:analysis / Q000737:chemistry*; D002606:Charcoal / Q000737:chemistry*; D003300:Copper / Q000032:analysis / Q000737:chemistry*; D004784:Environmental Monitoring; D052918:Environmental Restoration and Remediation / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D007477:Ions / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*; D015032:Zinc / Q000032:analysis / Q000737:chemistry*
chemical_list: D007477:Ions; D014874:Water Pollutants, Chemical; C540010:biochar; D002104:Cadmium; D002606:Charcoal; D003300:Copper; D015032:Zinc