Removal of Paraquat from Aqueous Solutions onto Zeolite LTL


  • Wilaiporn Insuwan Rajamangala University of Technology Isan Surin Campus
  • Kunwadee Rangsriwatananon Suranaree University of Technology



Paraquat, zeolite LTL, removal, Langmuir isotherm.


Zeolite LTL (K_LTL and H_LTL) was used as adsorbent for the adsorption of herbicide paraquat from an aqueous solution. The characterization of zeolite LTL has been carried out through various techniques: X-ray diffraction, X-ray fluorescence spectroscopy, FTIR and surface analysis. The adsorption occurred through cation exchange and the results showed that the adsorption capacity of paraquat onto K_LTL (161.71 mg/g) is higher than H_LTL (25.67 mg/g). These results can be explained by the amount of Al in the structure of zeolite and affinities of negative sites in zeolite and extra-framework cations (K+ and H+). The equilibrium data was best adjusted using the Langmuir model which has high correlation coefficient values (0.99).


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Author Biographies

Wilaiporn Insuwan

Faculty of Agriculture and Technology, Rajamangala University of Technology Isan Surin Campus, Surin 32000, Thailand

Kunwadee Rangsriwatananon

School of Chemistry, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand


Published In
Vol 21 No 2, Mar 31, 2017
How to Cite
W. Insuwan and K. Rangsriwatananon, “Removal of Paraquat from Aqueous Solutions onto Zeolite LTL”, Eng. J., vol. 21, no. 2, pp. 15-23, Mar. 2017.