Magnetic metal-organic frameworks for efficient removal of cadmium(II), and lead(II) from aqueous solution

F. Abdel-Magied, AhmedKTH,Stockholms universitet,Institutionen för organisk kemi,Resursåtervinning,Nuclear Materials Authority. P. O. Box 530, El Maadi, Cairo, Egypt,KTH Royal Inst Technol, Dept Chem Engn, S-100 44 Stockholm, Sweden.;Nucl Mat Author, POB 530,El Maadi, Cairo, Egypt. (författare)

QC 20220315
Efficient and convenient methods for the removal of toxic heavy metal ions especially Cd(II) and Pb(II) from aqueous solutions is of great importance due to their serious threat to public health and the ecological system. In this study, two magnetic metal-organic frameworks (namely: Fe3O4@ZIF-8, and Fe3O4@UiO-66–NH2) were synthesized, fully characterized, and applied for the adsorption of Cd(II) and Pb(II) from aqueous solutions. The adsorption efficiencies for the prepared nanocomposites are strongly dependent on the pH of the aqueous solution. The maximum adsorption capacities of Fe3O4@UiO-66–NH2, and Fe3O4@ZIF-8 at pH 6.0 were calculated to be 714.3 mg·g−, and 370 mg·g−1 for Cd(II), respectively, and 833.3 mg·g−1, and 666.7 mg·g−1 for Pb(II), respectively. The adsorption process follows a pseudo-second-order model and fit the Langmuir isotherm model. Moreover, the thermodynamic studies revealed that the adsorption process is endothermic, and spontaneous in nature. A plausible adsorption mechanism was discussed in detail. The magnetic adsorbents: Fe3O4@ZIF-8, and Fe3O4@UiO-66–NH2 showed excellent reusability, maintaining the same efficiency for at least four consecutive cycles. These results reveal the potential use of magnetic Fe3O4@ZIF-8, and Fe3O4@UiO-66–NH2 as efficient adsorbents in removing Cd(II) and Pb(II) from aqueous solutions.

Abdelhamid, Hani Nasser,1986-Stockholms universitet,Institutionen för material- och miljökemi (MMK),Assiut University, Egypt,Assiut Univ, Dept Chem, Adv Multifunct Mat Lab, Assiut 71515, Egypt.;Stockholm Univ, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden.(Swepub:su)hnass (författare)
Ashour, Radwa M.KTH,Resursåtervinning,Nuclear Materials Authority. P. O. Box 530, El Maadi, Cairo, Egypt,KTH Royal Inst Technol, Dept Chem Engn, S-100 44 Stockholm, Sweden.;Nucl Mat Author, POB 530,El Maadi, Cairo, Egypt.(Swepub:kth)u1ce36g8 (författare)
Fu, LeCentral South University,Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China. (författare)
Dowaidar, MoatazKing Fahd University of Petroleum and Minerals (KFUPM),King Fahd Univ Petr & Minerals KFUPM, Dept Bioengn, Dhahran 31261, Saudi Arabia. (författare)
Xia, Wei,Senior Lecture/Associate ProfessorUppsala universitet,Tillämpad materialvetenskap(Swepub:uu)weixi400 (författare)
Forsberg, KerstinKTH,Resursåtervinning,KTH Royal Inst Technol, Dept Chem Engn, S-100 44 Stockholm, Sweden.(Swepub:kth)u1dfmuzo (författare)
Stockholms universitetInstitutionen för organisk kemi (creator_code:org_t)

Ingår i:Journal of Environmental Chemical Engineering: Elsevier BV10:32213-29292213-3437

Av författaren/redakt...: F. Abdel-Magied, ...; Abdelhamid, Hani ...; Ashour, Radwa M.; Fu, Le; Dowaidar, Moataz; Xia, Wei, Senior ...; visa fler...; Forsberg, Kersti ...; visa färre...

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Av lärosätet: Stockholms universitet; Kungliga Tekniska Högskolan; Uppsala universitet

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