Synthesis of a Selective Scavenger for Ag(I), Pd(II), and Au(III) Based on Cellulose Filter Paper Grafted with Polymer Chains Bearing Thiocarbamate Moieties

Chemically modified rice husk as an effective adsorbent for removal of palladium ions

“…By plotting a relation between C e /q e against C e , a straight line was obtained with a slope equals to 1/q m and an intercept equals to 1/bq m . The q m of Pd 2+ equals 198.2 mg g −1 which is higher than that achieved by other sorbents [ 10 , 39 , 40 , 41 ] as shown in Table (2) . The results also showed that RH@MCM-41@ARS had greater q m compared to that of RH@MCM-41 and RH (16.1 and 13.3 mg g −1 , respectively).…”

“… Method q m (mg g −1 ) Ref. Polyethyleneimine-Functionalized Alumina Nanopowder 97.7 [ 39 ] Poly (N-phenylethanolamine) modified MWCNTs 101 [ 40 ] Cellulose filter paper grafted with polymer chains bearing thiocarbamate moieties 37 [ 41 ] Modified activated carbon 92 [ 10 ] RH@MCM-41@ARS 198.2 Our work …”

Selective capture of Pd2+ by graft copolymer bearing LCST graft chain and metal adsorbing stem chain

“…Sulfur compounds are one of the most examined materials for adsorption of noble metals owing to the affinity with heavy metals. For example, materials based on thiocarbonyl compounds, thioethers, and thiols have been reported, and softer Lewis bases tend to have higher selectivity to noble metals. Thiocarbonyl compounds are softer than thiols, and easily tunable in their softness by the substituents.…”

Synthesis of Hydrophilic Sulfur‐Containing Adsorbents for Noble Metals Having Thiocarbonyl Group Based on a Methacrylate Bearing Dithiocarbonate Moieties

“…Typical methods for collection of noble metals from water are solvent extraction [7][8][9][10][11][12], adsorption [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31], and electrochemical processes [32]. e collection by adsorption is advantageous owing to its low cost, safety, and high efficiency.…”

“…However, thiol groups are susceptible to oxygen-converting thiols into disulfides via oxidative coupling [44]. iocarbonyl moieties such as thioamide [26][27][28][29][30][47][48][49][50][51][52][53], thiourethane [31,33,35,37], and thiourea [11,25,[54][55][56][57][58][59][60] have also been examined as stable adsorbents. We also have found that a polymer bearing N,N-dialkylthiourethane moieties has high adsorption ability to Pd and Au, but the adsorption from aqueous solutions only proceeded in the presence of organic solvents such as chloroform due to the hydrophobic nature of the backbone [35].…”