Removal of As(III) and As(V) by a Porous Spherical Resin Loaded with Monoclinic Hydrous Zirconium Oxide

Abstract

A porous spherical resin loaded with monoclinic hydrous zirconium oxide was prepared and the physico-chemical properties were examined. The zirconium loaded resin showed a strong retainment of As(III) and As(V). The removal of low concentration of arsenic to meet the demand of industrial effluent standard (0.1ppm, ppm = mg dm−3) was achieved by the column process with the present resin.

Arsenic removal from water/wastewater using adsorbents—A critical review

“…Adsorption of Se(VI), Se(IV), As(IIII), As(V), and methyl derivatives of As(V) onto porous polymer beads loaded with monoclinic hydrous zirconium oxide (Zroxide) was also reported by Suzuki et al [315]. As(III) and As(V) was removed by a porous spherical resin loaded with monoclinic hydrous zirconium oxide [316].…”

Arsenic removal from real-life groundwater by adsorption on laterite soil

“…Assuming the spherical geometry of the adsorbent, the first-order rate constant, k 1 obtained from the slopes of the straight lines of first-order model can be utilized to estimate the pore diffusion coefficient as defined in Eq. (17) or the film diffusion coefficient as defined in Eq. (18):…”

“…(17) and (18) are called half-time equations where r is the mean geometric radius of the adsorbent in cm, ␦ the thickness of Table 4 Constant values of the pore diffusion and film diffusion models Initial concentration (ppm) 0.33 C e (ppm) 0.01…”

“…(19) and by substituting t 1/2 values in Eqs. (17) and (18), the D p and D f values can be calculated for initial arsenic concentration of 0.33 ppm assuming δ = 0.001 cm. The values obtained are presented in Table 4.…”

“…So far, various adsorbents either from natural and synthetic origin have been developed for arsenic removal. These include metal-loaded coral limestone [8,9], hematite and feldspar [10], sandy soils [11], activated carbon [12,13], activated alumina [14,15], lanthanum-loaded silica gel [16], hydrous zirconium oxide [17], ferric hydr(oxides) [18], etc. In many such adsorption processes arsenate is removed more effectively than arsenite.…”