Adsorption behaviour and mechanisms of cadmium and nickel on rice straw biochars in single- and binary-metal systems

• Published in: Chemosphere (Oxford) Vol. 218; pp. 308 - 318
• Main Authors: Deng, Yiyi, Huang, Shuang, Laird, David A., Wang, Xiugui, Meng, Zhuowen
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.03.2019
• Subjects: Adsorption; binding sites; Biochar; Cadmium; Cadmium - chemistry; Cadmium - isolation & purification; cation exchange; Charcoal - chemistry; Competition; Mechanism; metal ions; Nickel; Nickel - chemistry; Nickel - isolation & purification; Oryza - chemistry; Plant Stems - chemistry; rice straw; soil; sorption isotherms; Water Pollutants, Chemical - chemistry; Water Pollutants, Chemical - isolation & purification; Competition; Cadmium; Nickel; Biochar; Mechanism

Adsorption mechanisms and competition between Cd2+ and Ni2+ for adsorption by rice straw biochars prepared at 400 °C (RB400) and 700 °C (RB700) were investigated in this study. Based on the Langmuir model, the maximum adsorption capacities (mg g−1) of Cd2+ and Ni2+ on RB400 and RB700 were in the ord...