TY - JOUR
T1 - Evaluating the efficiency of different natural clay sediments for the removal of chlortetracycline from aqueous solutions
AU - Al-Wabel, Mohammad I.
AU - Ahmad, Munir
AU - Usman, Adel R.A.
AU - Sallam, Abdulazeem S.
AU - Hussain, Qaiser
AU - Binyameen, Ridwan B.
AU - Shehu, Muhammed R.
AU - Ok, Yong Sik
N1 - Funding Information:
The authors acknowledge funding from the Research and Development (R&D) Program (Research Pooling Initiative), Ministry of Education, Riyadh, Saudi Arabia , (RPI-KSU).
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2020/2/15
Y1 - 2020/2/15
N2 - Natural clay sediments were collected from ten different localities in Saudi Arabia (S-1 from eastern, S-2 to S-4 from middle and S-5 to S-10 from western regions), characterized and evaluated for their efficiency towards chlortetracycline (CTC) removal from aqueous solutions. Sediment S-4 exhibited highest surface area (288.5 m2 g−1), followed by S-5, S-9, and S-1 (252.1, 249.6, and 110.4 m2 g−1, respectively). Sediments S-5, S-9, S-2, and S-4 showed the highest cation exchange capacities (CEC) (62.33, 56.54, 52.72, and 46.85 cmol kg−1, respectively). The pH range of 3.5–5.5 was optimum for the highest CTC removal. Freundlich model was best fitted to CTC sorption data (R2 = 0.96–0.99), followed by Dubinin-Radushkevich model (R2 = 0.89–0.97). The sediments S-4, S-5, and S-9 exhibited the highest CTC removal efficiency (98.80–99.05%), which could be due to higher smectite and kaolinite contents, CEC, surface area and layered structure. Post-sorption XRD patterns shown new peaks and peak shifts confirming the sorption of CTC. Electrostatic interactions, interlayer sorption and H–π bonding were the potential CTC sorption mechanisms. Therefore, natural clay sediments with high sorption capacities could efficiently remove CTC from contaminated aqueous media.
AB - Natural clay sediments were collected from ten different localities in Saudi Arabia (S-1 from eastern, S-2 to S-4 from middle and S-5 to S-10 from western regions), characterized and evaluated for their efficiency towards chlortetracycline (CTC) removal from aqueous solutions. Sediment S-4 exhibited highest surface area (288.5 m2 g−1), followed by S-5, S-9, and S-1 (252.1, 249.6, and 110.4 m2 g−1, respectively). Sediments S-5, S-9, S-2, and S-4 showed the highest cation exchange capacities (CEC) (62.33, 56.54, 52.72, and 46.85 cmol kg−1, respectively). The pH range of 3.5–5.5 was optimum for the highest CTC removal. Freundlich model was best fitted to CTC sorption data (R2 = 0.96–0.99), followed by Dubinin-Radushkevich model (R2 = 0.89–0.97). The sediments S-4, S-5, and S-9 exhibited the highest CTC removal efficiency (98.80–99.05%), which could be due to higher smectite and kaolinite contents, CEC, surface area and layered structure. Post-sorption XRD patterns shown new peaks and peak shifts confirming the sorption of CTC. Electrostatic interactions, interlayer sorption and H–π bonding were the potential CTC sorption mechanisms. Therefore, natural clay sediments with high sorption capacities could efficiently remove CTC from contaminated aqueous media.
KW - Adsorption
KW - Antibiotics
KW - Intercalation
KW - Isotherms
KW - Minerals
UR - http://www.scopus.com/inward/record.url?scp=85075417269&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2019.121500
DO - 10.1016/j.jhazmat.2019.121500
M3 - Article
C2 - 31727527
AN - SCOPUS:85075417269
SN - 0304-3894
VL - 384
JO - Journal of hazardous materials
JF - Journal of hazardous materials
M1 - 121500
ER -