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- Title
Surfactant modified kaolinite (MK-BZK) as an adsorbent for the removal of diazinon from aqueous solutions.
- Authors
Tilaki, Dianati Ramzanali; Kalakesh, Laleh R.; Bavandi, Sahebeh; Babanejad, Ismail; Charati, Jamshid Yazdani; Rodriguez-Couto, Susana
- Abstract
This paper presents the adsorption potential of natural kaolinite (NK) and kaolinite modified with benzalkonium chloride (MK-BZK) for the removal of the diazinon pesticide from contaminated water. Batch experiments were carried out with various experimental conditions such as pH (3, 7, and 11), adsorbent dosage (1, 5, and 10 g/L), initial diazinon concentration (5-100 g/L) and contact time (0-40 min). Based on the experimental data, the removal efficiency of MK-BZK was slightly higher (97%) than that of NK (93%) operating at pH 3 and optimum contact times of 10 and 15 min, respectively. The adsorption rate followed a pseudo-second-order kinetics model and the equilibrium adsorption fitted well the Freundlich adsorption isotherm model. The maximum adsorption capacity of diazinon on NK and MK-BZK was 0.86 and 2.25 mg/g, respectively. Overall, MK-BZK has potential as a local and cost-effective adsorbent to remove diazinon from aqueous solutions.
- Subjects
AQUEOUS solutions; FREUNDLICH isotherm equation; ADSORPTION capacity; WATER pollution; SURFACE active agents; BENZALKONIUM chloride
- Publication
Desalination & Water Treatment, 2020, Vol 196, p137
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2020.25922