title: [Biosorption characteristics of Cu2+ by spent substrate of pleurotus oyster].
abstract: To solve the problems of heavy metal pollution and agricultural wastes reclamation, spent substrate of pleurotus oyster was used as adsorbents to remove Cu2+ from aqueous solution. The effects of pH value, adsorption time, temperature and initial Cu2+ concentration on the adsorption behavior were determined by single factor experiments. The mechanisms were preliminarily investigated by SEM-EDX, FTIR and XRD analysis. The results of single factor experiments showed that the adsorption rate and capacity reached 74.46% and 0.7446 mg x g(-1) respectively at an adsorbent concentration of 10 g x L(-1), a pH of 6, an adsorption time of 120 min, an adsorption temperature of 30 degrees C and an initial Cu2+ concentration of 8 mg x L(-1). The experimental data fitted well with Langmuir isotherm models and R2 reached 0.994 9, indicating the adsorption was a monolayer chemisorption. SEM-EDX, FTIR and XRD analysis indicated that the adsorption process mainly depended on the physical and chemical adsorption onto the substrate surface through electrostatic attraction, complexation and coordination reaction. The -OH, -COOH and -NH were the functioning groups for Cu2+ adsorption.
authors.forename: Xiao-Jing
authors.initials: XJ
authors.lastname: Hu
authors.forename: Ting-Ting
authors.initials: TT
authors.lastname: Zang
authors.forename: Hai-Dong
authors.initials: HD
authors.lastname: Gu
authors.forename: Yu
authors.initials: Y
authors.lastname: Jin
authors.forename: Juan-Juan
authors.initials: JJ
authors.lastname: Qu
mesh_terms: D000327:Adsorption; D000818:Animals; D003300:Copper / Q000378:metabolism*; D004785:Environmental Pollutants / Q000378:metabolism; D052918:Environmental Restoration and Remediation / Q000379:methods*; D006863:Hydrogen-Ion Concentration; D020076:Pleurotus / Q000378:metabolism*; D013696:Temperature
chemical_list: D004785:Environmental Pollutants; D003300:Copper