Design and syntheses of functionalized copper-based MOFs and its adsorption behavior for Pb(II)

Bimetal–Organic Frameworks Incorporating Both Hard and Soft Base Active Sites for Heavy Metal Ion Capture

“…With the concentration of Pb 2+ reached to 662 ppm, the adsorption progress reached to saturation and the saturation adsorption capacity of CdK- m -COTTTB for Pb 2+ is 636.94 mg·g –1 , surpassing that of many materials such as PEI-ECH-FA-CMCS (302.56 mg·g –1 ), Ni 0.6 Fe 2.4 O 4 –UiO-66-PEI (273.2 mg·g –1 ), AMO-MOF (472.73 mg·g –1 ), and so on (Figure c, Table S4). − Moreover, it even outperforms sulfhydryl-containing materials such as SH-CDP (604.7 mg·g –1 ) . Moreover, the adsorption thermodynamics of CdK- m -COTTTB on Pb 2+ is more in line with the Langmuir model ( R 2 = 0.9991) than the Freundlich model ( R 2 = 0.6058) (Table S5, Figure S16).…”

Well-designed protein amyloid nanofibrils composites as versatile and sustainable materials for aquatic environment remediation: A review

“…Concretely speaking, chemical complexation/chelation benefited from the abundant –COOH and –NH 2 groups of the ANFs-based composites, which were coordinated with metal ions to form N-metal and C O-metal complexes [ 42 ]. The electrostatic interaction was attributed to the free ionizable –COOH and –NH 2 groups, which could generate positive or negative charges to attract ionic pollutants, including organic matter such as dyes, humic acid, microplastics, negative DNA, and metal ions like Pb(II), Hg(II), and Cr(VI) [ 136 , 137 ]. Ion exchange was due to the exchange of H + and OH − , which was generated from –COOH and –NH 2 in the water environment, with a metal cation and metal anions.…”

Engineering of efficient functionalization in a zirconium-hydroxyl-based metal–organic framework for an ultra-high adsorption of Pb2+ ions from an aqueous medium: an elucidated uptake mechanism

“…23,24 To date, MOFs have been reported with potential applications in many fields, including catalysis, [25][26][27][28] separation, 29,30 sensor, 31,32 energy storage, 33,34 and adsorption. [35][36][37][38] Noteworthily, the MOF architecture can be adjusted by functional groups to enhance the interactions between the adsorption sites and guest moieties, driving new promising approaches with respect to adsorption. In particular, zirconium-based MOFs are well known as highly water-stable materials due to their rigid backbone and stable metal-carboxylate bonds, opening excellent applications in real-life situations.…”