Kinetic, equilibrium and thermodynamic studies of Ni(II) ions sorption on sulfuric acid treated Lagenaria vulgaris shell

Abstract

Chemically modified Lagenaria vulgaris shell (ccLVB) was tested as a new sorbent for the removal of Ni(II) from aqueous solution, in batch conditions. The sorption process was very fast reaching equilibrium in about 20 min. Ni(II) sorption is almost invariant in the pH range from 3 to 6. Sorption kinetics followed pseudo-second order, intraparticle diffusion and Chrastil?s models, which suggest that both surface reaction and diffusion were the rate-limiting steps. Equilibria experimental results are well fitted by Langmuir and Temkin sorption isotherm models, indicating mixed adsorption process. The maximum biosorption capacity of ccLVB for Ni(II) was found to be 84.51 mg g-1. The calculated thermodynamic parameters showed that the biosorption of nickel on ccLVB was feasible, spontaneous and exothermic at 25-45?C. The desorption experiments showed that the ccLVB could be reused for five cycles without significant loss in sorption capacity. Release of Na+ ions from the biosorbent during sorption of Ni(II) reveals that the main sorption mechanism is ion exchange. Presented study suggests that ccLVB can be used effectively for the removal of Ni(II) ions from aqueous solution.

Sulfonated „Lagenaria vulgaris“ shell as a potent biosorbent for copper at low pHs

“…It can be assumed that complexation with incorporated sulphonic groups plays a significant role in removing Cu(II) ions. It is worth mentioning that the pHpzc value of our material is lower compared to starting material (pHpzc 6.10) or even Lagenaria vulgaris shell treated with sulfuric acid (pHpzc 4.95, pHsus 5.65) (Bojić et al, 2016;Ljupković et al, 2011).…”

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].…”

Artificial Neural Network Approach for Modeling of Ni(Ii) Adsorption from Aqueous Solution by Peanut Shell

“…Removal of various heavy metals using different adsorbents have been extensively studied in recent years [19][20][21]. For removal of nickel from wastewater, several researches have been carried out on the potential of different adsorbents such as zeolit, bentonit [22], kaolinite clay [23], coal dust and magnetized sawdust [24], teak leaves powder [25], cashew nut shell [26], Lagenaria vulgaris shell [27], calcareous soils [28], plantain peels [29], chitosan [30], cherry kernels [7], clay [31] and henna [16].…”