Removal of Pb(II), Cu(II), and Cd(II) from aqueous solutions by biochar derived from KMnO4 treated hickory wood.
In this work, a novel approach was developed to prepare an engineered biochar from KMnO4 treated hickory wood through slow pyrolysis (600°C). Characterization experiments with various tools showed that the engineered biochar surface was covered with MnOx ultrafine particles. In comparison to the pristine biochar, the engineered biochar also had more surface oxygen-containing functional groups and much larger surface area. Batch sorption experiments showed that the engineered biochar had strong sorption ability to Pb(II), Cu(II), and Cd(II) with maximum sorption capacities of 153.1, 34.2, and 28.1mg/g, respectively, which were significantly higher than that of the pristine biochar. Batch sorption experiments also showed that the dosage, initial solution pH, and ionic strength affected the removal of the heavy metals by the biochars. The removal of the metals by the engineered biochar was mainly through surface adsorption mechanisms involving both the surface MnOx particles and oxygen-containing groups.
School of Civil Engineering, Wuhan University, Wuhan 430072, China; Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States.
Hongyu
H
Wang
Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States. Electronic address: bg55@ufl.edu.
Bin
B
Gao
Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States.
Shenseng
S
Wang
Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL 32611, United States.
June
J
Fang
School of Civil Engineering, Wuhan University, Wuhan 430072, China.
Yingwen
Y
Xue
School of Civil Engineering, Wuhan University, Wuhan 430072, China.
Kai
K
Yang
D000327:Adsorption; D002104:Cadmium / Q000737:chemistry*; D002413:Cations, Divalent / Q000737:chemistry; D002606:Charcoal / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D007854:Lead / Q000737:chemistry*; D011196:Potassium Permanganate / Q000737:chemistry; D018508:Water Purification / Q000379:methods*; D014934:Wood / Q000737:chemistry
D002413:Cations, Divalent; C540010:biochar; D002104:Cadmium; D011196:Potassium Permanganate; D002606:Charcoal; D007854:Lead; D003300:Copper
Biochar; Cadmium; Copper; Heavy metals; Lead