Details

Autor(en) / Beteiligte

• Yoo-iam, Maneekarn
• Kambhu, Ann
• Satapanajaru, Tunlawit

Titel

Adsorption of Phenol and Zinc as Dual Contaminants in Groundwater on Flood Plain Deposit Aquifer: Kinetic, Thermodynamic, and Column Operation Studies

Ist Teil von

• Water, air, and soil pollution, 2023-04, Vol.234 (4), p.261, Article 261

Ort / Verlag

Cham: Springer International Publishing

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Groundwater is contaminated with phenol and Zn 2+ in eastern Thailand, requiring study of the adsorption behavior of these co-contaminants on the aquifer for remediation design. The aquifer characteristics, the effect of temperature on kinetics, and the equilibrium of sorption on the aquifer were investigated. X-ray fluorescence (XRF) analysis of the flood plain aquifer revealed that the aquifer was a dispersive aluminosilicate mineral with a SiO 2 composition of 58.24%. In the endothermic reaction, an increase in the temperature resulted in an increasing adsorption rate. The adsorption kinetics was well described using a pseudo-second-order kinetic model. The intraparticle diffusion model indicated that this was not the only rate-limiting step. The adsorption isotherm data were well described by Freundlich equations. The maximum adsorption capacity of the aquifer for phenol was 24.8 mg g −1 and for Zn 2+ was 18.7 mg g −1 at 25 °C. The adsorption capacities of both phenol and Zn 2+ decreased in a binary system. The overall adsorption process was endothermic and spontaneous. After equilibrium, FTIR analysis indicated the adsorption properties of phenol and Zn 2+ onto the surface of the aquifer. These results showed that the flood plain deposit aquifer had differing adsorption properties of phenol and Zn 2+ at different temperatures in the contaminated groundwater.