Work

Removal of Cu2+ from Aqueous Solution by Biosorption on Rice Straw - an Agricultural Waste BiomassRemoval of Cu2+ from Aqueous Solution by Biosorption on Rice Straw - an Agricultural Waste Biomass

Year: 2012

Type: article

Abstract: The potential of rice straw, agricultural waste, to remove copper (II) from aqueous solution was evaluated in a batch process.Experiments were carried out as function of contact time, initial concentration, pH and temperature.Adsorption isotherms were modeled with the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherms.The data fitted well with the Freundlich isotherm.The equilibrium biosorption isotherms showed that biosorbent possess high affinity and sorption capacity for Cu(II) ions, with sorption capacities of 74.70 mg Cu 2+ per 1 g biomass.Thermodynamic parameters such as free energy change (ΔG°), enthalpy change (ΔH°) and entropy change (ΔS°) have been calculated on the basis of Langmuir constants.The results indicated that the rice straw could be an alternative for more costly adsorbents used for heavy metal removal.

Source: International Journal of Environmental Science and Development

DOI: 10.7763/ijesd.2012.v3.179

Authors: Achanai Buasri, Nattawut Chaiyut, Kessarin Tapang, Supparoek Jaroensin, Sutheera Panphrom

Institutions: Chulalongkorn University, Silpakorn University

Language: English

Topic: Adsorption and biosorption for pollutant removal

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Responsible consumption and production, Clean water and sanitation

Open Access status: bronze

Funders: Chulalongkorn University, Silpakorn University, Faculty of Engineering and Industrial Technology, Silpakorn University