Factors affecting the sorption of trivalent chromium by zeolite synthesized from coal fly ash

Synthesis of Pure Na–X and Na–P Zeolite from Acid-Extracting Residues of CFB Fly Ash by a Single-Step Hydrothermal Method

“…Figure 2 shows zeolite Na-P particles which have spherical shape with rough surface. This typical particle shape is consistent with a previous report employing similar preparation method [21][22][23] .When the curing time was lengthened into 8 h, the pure phase of zeolite Na-P was still preserved thus no change in crystal structure. Comparing SEM image between Fig.…”

Kinetics of adsorption of metal ions on inorganic materials: A review

“…However, many of the studies were without application of any kinetic models and were based on just showing the variation in adsorption capacity with time and usually to establish the time taken to arrive at equilibrium. A cross-section of such works that considered adsorption on various inorganic solids without dealing with any of the kinetic aspects is given below: Cu(II) on Ca-kaolinite [64], Cd(II), Cu(II) and Pb(II) on diatomite and Mn-diatomite [65], Ca(II) on hydroxy-Al pillared montmorillonite [66], Cd(II), Cr(III), Cu(II), Ni(II), Pb(II) and Zn(II) on kaolinite and illite [67], Cu(II) on sewage sludge ash [68], Ni on illite [69], Cd(II), Cr(III), Cu(II), Mn(II), Ni(II), Pb(II) and Zn(II) on Na-montmorillonite [70], As(V) on calcined synthetic hydrotalcite and calcined natural boehmite [71], Cd(II) and Zn(II) on apatite [72], Co(II), Cu(II), Mn(II) and Zn(II) on natural zeolite [73], Cu(II), Pb(II) and Zn(II) on natural zeolite [74], As(V) on bimetal oxide [75], Cd(II) and Pb(II) on amine-modified zeolite [76], As(III) and As(V) on TiO 2 [77], Cd(II) and Zn(II) on modified clinoptilolite [78], Co(II) and Zn(II) on treated bentonite [79], Cu(II) on clinoptilolite [80], Cu(II), Co(II) and Zn(II) on natural bentonite [81], Cr(III) on zeolite [82], Cr(VI) on surfactant-modified zeolite [83], Co(II) and Ni(II) on ion exchange resins [84], Hg(II) on natural and modified montmorillonite (treated with pyridine, dimethyl sulfoxide and 3-aminopropyltriethoxysilane) [85], Cd(II), Cr(III) and Mn(II) on natural sepiolite [86], Cu(II) on Serbian zeolite, clay and diatomite [87], Cu(II) on bentonite-polyacrylamide composites [88], etc.…”

Adsorption of bisphenol A from water by surfactant-modified zeolite

“…doi:10.1016/j.jcis.2010.04.074 excellent sorbability for the pollutants of inorganic cations and anions [29][30][31][32]. Here we report the adsorption capacity and mechanism of BPA from water by surfactant-modified ZFA (SMZFA).…”