Mechanism of phosphate removal from aqueous solutions by biochar supported nanoscale zero-valent iron
Fengfeng Ma, Baowei Zhao, Jingru Diao, Yufeng Jiang, Jian Zhang
Abstract
, respectively. The pH value of the solution greatly affected the adsorption capacity of nZVI-RSBC for phosphate. The combined results of batch experiments and characterizations revealed that the possible mechanism was the complexation of oxygen-containing functional groups on the surface of nZVI-RSBC with phosphate, hydrogen bonding, and electrostatic attraction between phosphate and the positively charged adsorption sites under acidic conditions. Such a strong adsorption capacity, as well as the characteristics of easy availability, excellent recyclability and low cost, make nZVI-RSBC potentially suitable for the treatment of phosphate-rich water.
Topics & Concepts
AdsorptionBiocharPhosphateZerovalent ironAqueous solutionChemistryX-ray photoelectron spectroscopyChemical engineeringFourier transform infrared spectroscopyInorganic chemistryNuclear chemistryOrganic chemistryPyrolysisEngineeringPhosphorus and nutrient managementEnvironmental remediation with nanomaterialsAdsorption and biosorption for pollutant removal