Effect of metal atom in zeolitic imidazolate frameworks (ZIF-8 & 67) for removal of Pb2+ & Hg2+ from water

Effect of Open Metal Sites in Cobalt-Based Bimetallic Metal–Organic Framework Nanoparticles-Coated Quartz Crystal Microbalance (QCM) for Humidity Detection

“…In order to further prove that ZIF-67 and ZIF-CoX have been synthesized successfully, the Fourier transform infrared (FT-IR) curves are shown in Figure S1a–d (Supporting Information). Clearly, all the curve shapes of bimetallic ZIF-CoX samples are in good agreement with the identified ZIF-67 . Including, there are two absorption peaks at 2925 and 3133 cm –1 belong to stretching vibration of CH bond in 2-MeIm ligand.…”

“…Clearly, all the curve shapes of bimetallic ZIF-CoX samples are in good agreement with the identified ZIF-67. 41 Including, there are two absorption peaks at 2925 and 3133 cm −1 belong to stretching vibration of CH bond in 2-MeIm ligand. The small absorption peak at 1580 cm −1 is ascribed to the stretching vibration of a CN bond.…”

Rational synthesis and characterization of highly water stable MOF@GO composite for efficient removal of mercury (Hg2+) from water

“…The product obtained washed with a solution containing CH 3 OH & H 2 O in 6:4 ratio, several times, to remove unwanted materials. Produced solid product was dried in oven at 80 °C for 12 h [ 38 ]. The resultant functionalized nanomaterial was used further to study the adsorption of mercury (Hg +2 ) from water.…”

“…Among water pollutants, heavy metal ions are the emerging water pollutants due to their severe toxicity, persistence, water mobility and accumulation tendency [ 4 ]. Heavy metal traces are abundantly found in both sediment and water [ 5 ]. Among all heavy metals traces, Mercury (Hg) is volatile and has persistency and therefore can easily transform into other toxic forms leading to bioaccumulation.…”

“…These methods suffer some limitations as well. These methods along with their limitations are; 1st by filtration/coagulation (using AlSO 4 which precipitates out Hg from water has detection limitation), 2nd by activated carbon (remove Hg by adsorption process has limitation because effectiveness depends upon Hg concentration), 3rd by reverse osmosis (by passing water through semi-permeable poly-amide membrane has limitation that this membrane is very expensive) and 4th by lime softening (using Ca(OH) 2 to precipitate out the heavy metal ions from water) [ 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 ].…”