Biosorption of heavy metals from aqueous solutions by chemically modified orange peel

Removal of chromium (VI) from aqueous solution using chemically modified orange (citrus cinensis) peel

“…Table 1 gives a summary of some of the physical properties of the orange peel which were determined by BET. The N 2 adsorption gave the specific surface area (S BET ) of 0.8311 m 2 /g and the value is close to other values reported in literature for orange peels [30]. …”

“…The FT-IR spectrum of orange peel modified with NaOH in Fig. 2 shows the weakening intensity of the peak at 1740 cm -1 indicating that the methyl esters were hydrolyzed with NaOH and the ester group was converted to the carboxylate ion [30]. The FT-IR spectra after Cr (VI) sorption is shown in Fig.…”

Biosorptive behaviour of mango leaf powder and rice husk for arsenic(III) from aqueous solutions

“…ions, the H ? ions are preferentially adsorbed rather than the metal ions (Feng et al 2011). At pH [2.0, a sharp increase in the percentage of As(III) sorption due to the (Feng et al 2011).…”

“…The interest in the development of cost-effective methods for the removal and recovery of heavy metals from contaminated waters has greatly increased and using different biomaterials as adsorbents. Among the various resources in biological wastes, both dead and live biomass, exhibit particularly interesting metal-binding capacities (Volesky 1994;Costa et al 1996;Feng et al 2011). In recent years, agricultural by products have been widely studied for metal removal from water.…”

“…In recent years, agricultural by products have been widely studied for metal removal from water. These include peat, wood, pine bark, banana pith, soybean, cottonseed hulls, peanut, shells, hazelnut shell, rice husk (RH), sawdust, wool, orange peel, compost and leaves (Khalid et al 1999;Wan Ngah et al 2007;Feng et al 2011). As a low cost, mango leaves powder (MLP) and rick husk is an attractive and inexpensive option for the biosorption removal of dissolved metals.…”