Facile Fabrication of ZnMgAl/LDH/Algae Composites as a Potential Adsorbent for Cr(VI) Ions from Water: Fabrication and Equilibrium Studies

Ibrahim Said; Mostafa R Abukhadra; Abdelrahman M Rabie; Al-Sayed A Bakr; Jae-Jin Shim; Sayed Abdelkader Ahmed

doi:10.1021/acsomega.0c04842

Facile Fabrication of ZnMgAl/LDH/Algae Composites as a Potential Adsorbent for Cr(VI) Ions from Water: Fabrication and Equilibrium Studies

ACS Omega. 2020 Nov 19;5(48):31342-31351. doi: 10.1021/acsomega.0c04842. eCollection 2020 Dec 8.

Authors

Ibrahim Said¹, Mostafa R Abukhadra², Abdelrahman M Rabie^{3

4}, Al-Sayed A Bakr³, Jae-Jin Shim⁴, Sayed Abdelkader Ahmed¹

Affiliations

¹ Chemistry Department, Faculty of Science, Beni-Suef University, Beni-Suef 62511, Egypt.
² Geology Department, Faculty of Science, Beni-Suef University, Beni-Suef 62511, Egypt.
³ Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo 11727, Egypt.
⁴ School of Chemical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea.

Abstract

In order to improve the adsorption capacity of natural layered double hydroxyl (LDH) materials, the natural organic sources such as algae containing hydroxyl groups, amino groups, peptide connections, and alginate structures were used to improve LDH for the preparation of ZnMgAl LDH-algae composites (LDH-Ax). The structure of prepared composites was established and characterized via various techniques such as scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy. The LDH-A2 sample displayed the highest efficiency for Cr(VI) removal, which reached to 99% at the optimum conditions. The prepared composite LDH-A2 showed high stability and reusability (91.7%) after five cycles. The kinetic studies revealed that the Cr uptake by LDH-A1 is described as pseudo-first order, while the case of LDH-A2 is described as pseudo-second order. This study reported that the easily synthesized LDH-Ax has an interesting environmental approval process to eliminate Cr ions from aqueous media quickly and effectively.