Effective adsorption of cadmium and lead using SO3H-functionalized Zr-MOFs in aqueous medium

Gul S 1 , Ahmad Z 2 , Asma M 1 , Ahmad M 3 , Rehan K 4 , Munir M 5 Show all authors , Bazmi AA 6 , Ali HM 7 , Mazroua Y 8 , Salem MA 9 , Akhtar MS 10 , Khan MS 11 , Chuah LF 12 , Asif S 13

Affiliations 

  • 1 Department of Environmental Sciences (FC), International Islamic University Islamabad, H-10 Sector, Pakistan
  • 2 School of Chemical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea
  • 3 Department of Plant Sciences, Quaid-i-Azam University, Islamabad, Pakistan
  • 4 Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan
  • 5 Department of Biological Sciences, International Islamic University, Islamabad, Pakistan
  • 6 Chemical Engineering Department, COMSATS University Islamabad (CUI), Lahore Campus, Lahore, Punjab, 54000, Pakistan
  • 7 Department of Chemistry, College of Science, Jouf University, P.O. Box 2014, Sakaka, Aljouf, Saudi Arabia. Electronic address: hmali@ju.edu.sa
  • 8 Department of Agricultural Economics, Faculty of Agriculture, Tanta University, Tanta, Egypt
  • 9 Department of Chemistry, Faculty of Science & Arts, King Khalid University, Mohail, Assir, Saudi Arabia; Department of Chemistry, Faculty of Science, Al-Azhar University, Nasr City, 11884, Cairo, Egypt
  • 10 School of Chemical Engineering, Yeungnam University, Gyeongsan, 712-749, South Korea. Electronic address: msakhtar@ynu.ac.kr
  • 11 Department of Chemical Engineering, Dhofar University, Salalah, 211, Oman
  • 12 Faculty of Maritime Studies, Universiti Malaysia Terengganu, Terengganu, Malaysia
  • 13 Faculty of Sciences, Department of Botany, PMAS Arid Agriculture University, Rawalpindi, Punjab, 46300, Pakistan. Electronic address: sairaasif@uaar.edu.pk
Chemosphere, 2022 Nov;307(Pt 1):135633.
PMID: 35810866 DOI: 10.1016/j.chemosphere.2022.135633

Abstract

Cadmium (Cd) and Lead (Pb) from industrial wastewater can bioaccumulate in the living organisms of water bodies, posing serious threats to human health. Therefore, efficient remediation of heavy metal ions of Cd (II) and Pb (II) in aqueous media is necessary for public health and environmental sustainability. In the present study, water stable Zirconium (Zr) based metal organic frameworks (MOFs) with SO3H functionalization were synthesized by solvothermal method and used first time for the adsorption of Cd (II) and Pb (II). Synthesis of UiO-66-SO3H, nano-sized (<100 nm) MOFs, was confirmed by FTIR, XRD, FESEM and BET. Effects of contact time, pH and temperature were investigated for adsorption of Cd (II) and Pb (II) onto SO3H-functionalized Zr-MOFs. The UiO-66-SO3H displayed notable rejections of 97% and 88% towards Cd (II) and Pb (II), respectively, after 160 min at 25 °C and pH (6) with an initial concentration of 1000 mg/L. Adsorption capacities of Cd (II) and Pb (II) were achieved as 194.9154 (mg/g) and 176.6879 (mg/g), respectively, at an initial concentration of 1000 mg/L. The Pseudo second-order kinetic model fitted well with linear regression (R2) of value 1. The mechanism was confirmed mainly as a chemisorption and coordination interaction between sulfone group (-SO3H) and metal ions Cd (IIa) and Pb (II). These results may support effective adsorption and can be studied further to enrich and recycle other heavy metals from wastewater.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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