Adsorption behaviors of lead ion onto acetate modified activated carbon fiber

Preparation of Double-Shelled C/SiO2 Hollow Spheres with Enhanced Adsorption Capacity

“…The removal of Pb 2+ by carbon-based materials and other adsorbents has been widely reported (Table S3, Supporting Information). The double-shelled C/SiO 2 and single-shelled SiO 2 spheres have sufficiently high adsorption capacities for typical contaminant ions compared with adsorbents used in previous studies. ,− Moreover, the adsorption capacities of the recycled hollow spheres to the Pb 2+ and Ag + ions could reach as high as ∼180 and ∼245 mg/g, respectively, even after five regeneration cycles (Figure b). The simple regeneration enables recycling of the adsorbent, which benefits resource protection and reduction of the costs of utilization.…”

“…Recent studies have shown that an aerosol-based route is a simple and effective approach for fabricating various porous particles. − As shown in Scheme , the as-synthesized C/SiO 2 aerosol particles in the present study have adjacent solid silica and carbon layers. This idea is significant because the novel double-shelled C/SiO 2 hollow spheres with large voids between the two layers and porous silica shell were obtained by dissolving and regrowing the solid silica layer of the C/SiO 2 aerosol particles.…”

“…As shown in Figure d,e, single-shelled silica spheres with a fiberlike rough surface and the carbon hollow spheres with a relatively smooth surface were obtained, which agreed with the double-shelled structures. Elemental analysis of the hollow particles by X-ray energy-dispersive spectroscopy (EDS; Figure S1A, Table S1, Supporting Information) further revealed the synthesis of single silica and carbon spheres. ,− Moreover, the silica or carbon could be completely separated from the double-shelled C/SiO 2 spheres through a simple etching or calcination treatment (Table S1, Supporting Information). The XRD pattern shows that the iron species in the double-shelled spheres were mainly Fe 3 O 4 particles (Figure S1B, Supporting Information) that were homogeneously distributed in the silica and carbon shells (Figure S1C, Supporting Information).…”

“…Tetraethyl orthosilicate (TEOS), cetyltrimethylammonium bromide (CTAB), and ferric chloride (FeCl 3 ·6H 2 O) were purchased from Sigma-Aldrich and used without further treatment. C/SiO 2 aerosol particles were synthesized based on a rapid aerosol method. , In a typical process, 0.95 g of FeCl 3 ·6H 2 O, 1.1 g of CTAB, and 4.5 mL of TEOS were dissolved in 15 mL of absolute ethanol under magnetic stirring, after which 2.0 mL of 0.1 M HCl solution was added and 1 g of sucrose was dissolved therein. The resulting mixture was sonicated for 10 min and then atomized using a commercial atomizer (model HD-130, HOLDER) with N 2 as the carrier gas.…”

Removal of lead(II) from water by di (2-ethylhexyl) phosphate containing ion exchange resin

“…The processes that have been developed to remove lead from wastewater include biosorption [4][5][6][7], electro-membrane processes [8,9], adsorption [10][11][12][13], coagulation-flocculation [14], and ion exchange [15][16][17].…”