Chemically Modified Lagenaria vulgaris as a Biosorbent for the Removal of CuII from Water

Abstract

The ability of a biosorbent based on a chemically modified Lagenaria vulgaris shell for CuII ion removal from aqueous solution was studied in batch conditions. The biosorbent was characterized by Fourier-transform infrared spectroscopy and the effect of relevant parameters such as contact time, pH, biomass dosage, and initial metal ion concentration was evaluated. The sorption process was found to be fast, attaining equilibrium within 40 min, and results were found to be best fitted by a pseudo-second order kinetic model. Experimental data showed that the biosorption is highly pH dependent, and the optimal pH was 5.0. Results were analyzed in terms of the following adsorption isotherms: Langmuir, Freundlich, Temkin, and Flory–Huggins, by a linear regression method. The CuII biosorption followed the Langmuir isotherm model (r2 = 0.998) with the maximum sorption capacity of 14.95 mg g–1. The methyl-sulfonated Lagenaria vulgaris biomass investigated in this study exhibited a high potential for the removal of CuII from aqueous solution.

A Novel Biosorbent Lagenaria vulgaris Shell ‐ ZrO2 for the Removal of Textile Dye From Water

“…The spectra of LVB and LVB-ZrO 2 are similar ( Figure 2A), exhibiting characteristic absorption bands for the lignocellulose material; a detailed discussion of LVB spectrum is given elsewhere (Stanković et al, 2013;Mitić-Stojanović et al, 2011). In the spectrum of LVB-ZrO 2 , the series of small absorption bends below 550 cm À1 corresponding to Zr-O vibrations were detected (Sahu and Rao, 2000;Sarkar et al, 2007), confirming the presence of ZrO2 in LVB-ZrO 2 .…”

“…It is mostly composed of cellulose and lignin (Shah et al, 2010). The shell of Lagenaria vulgaris was selected as the starting biosorbent material because it possesses a macro porous structure, very high mechanical stability under various biosorption treatment conditions, it does not swell in water, and its cellulosic structure offers the possibility of chemically modification (Stanković et al, 2013). In addition, it is easily available, environmentally friendly, low cost and easy to grow and prepare.…”

“…In addition, it is easily available, environmentally friendly, low cost and easy to grow and prepare. Lagenaria vulgaris shell has effectively removed metal cations from water (Mitić-Stojanović et al, 2011;Stanković et al, 2013), but its ability to remove the anionic dye is relatively low. In attempt to improve that ability and to obtain an efficient material for the reactive dye removal, it was modified with a small amount of ZrO 2 .…”

Development and characterisation of miscellaneous cationic sorbents based on lignocellulosic gourd shell

“…However, there is insufficient data in the available literature on the use of the gourd shell as a sorbent for anionic pollutants. Gourd shell has been examined generally as a sorbent for the removal of heavy metals from water, in its native form [17], or in the form of some chemically modified (xanthated, sulfonated and methylsulfonated) sorbents [18][19][20][21]. More recent studies have focused on the removal of other pollutants from aqueous solutions, such as dyes [22], herbicides [23], and pharmaceutical substances [24].…”

The preparation and utilization of the cationic sorbent based on the surfactant modified bottle gourd shell

“…The availability of specific functional groups such as hydroxyl (OH) existing in the cellulose, hemicelluloses, as well as the lignin structure suggests a potential of using BGS as a sorbent material. In the past, BGS has been selected to be a sorbent for the removal of heavy metals from wastewater [20,[23][24][25]. The BGS biomass is of a hydrophilic nature, as is the case for cellulose itself.…”