Weathered Sand of Basalt as a Potential Nickel Adsorbent

Abstract

The natural mineral, weathered sand of basalt (WSB), was utilized to investigate whether nickel can be removed. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis were performed to characterize WSB. The effects of various conditions, i.e., contact time, pH, WSB dosage, particle size of WSB, and temperature were analyzed. The experimental data were analyzed by two widely used equations, i.e., Langmuir and Freundlich isotherms. The results obtained revealed that the WSB adsorption process was more consistent with the Langmuir model than the Freundlich equation. The kinetics data fitted well into the pseudo-second-order model. The findings of the present study indicate that WSB could be used for removing nickel from aqueous solution. Moreover, its concentration can be reduced from 1.0 mg/L to ND (not detected, below the device limit <0.01 μg/L) under the optimal condition. Therefore, WSB is considered to be usable as one of the adsorbents for nickel removal in water. In addition, since heavy metals are often present in low concentrations in water, it is considered that WSB can be applied as one of the effective alternatives for removing low-concentration nickel.

Pb (II) Adsorption over Activated Carbon Prepared from Cedrus Deodara Bark by Na2CO3 Activation: Optimal Design for Modelling and Process Optimization

“…where K C is the dimensionless equilibrium constant, R is the gas constant having value 8.314 J K −1 mol −1 and T is the temperature in kelvin. The constant K C may be calculated from the equation: [47] 11 $$$\vcenter{\openup.5em\halign{$\displaystyle{#}$\cr {K}_{C}=\ {{{C}_{s}}\over{{C}_{e}}}=\ {{{C}_{0}-{C}_{e}}\over{{C}_{e}}}\hfill\cr}}$$$ …”

Mining Waste as an Eco-Friendly Adsorbent in the Removal of Industrial Basazol Yellow 5G Dye and Incorporation in Mortars

“…Thermodynamic analysis was useful for determining the nature of the process, its spontaneity, and whether it occurs endothermically or exothermically. The Gibbs free energy (∆G • ads ), enthalpy (∆H • ads ), and entropy (∆S • ads ) [29,30] were calculated using Equations ( 8)- (10):…”

“…k d = q eq C eq (10) where q eq is the amount of adsorbate adsorbed per gram of adsorbent at equilibrium (mg g −1 ) and C eq is the concentration of adsorbate remaining in the solution at equilibrium (mg L −1 ). The activation energy determines the minimum energy required for the reaction and can be obtained from the kinetic data at different temperatures.…”

“…In this technique, under appropriate conditions, rock dust is applied to the soil as a source of nutrients [7,8]. Another strand of research that explores various applications of rock powder concerns the treatment of effluents, including its use as an adsorbent of phosphate ions in water [9], and as a nickel adsorbent [10].…”

Rock Powder Applied in the Discoloration of Industry Dye of Molded Pulp Packages Effluent

“…Another line of research covers the use of rock dust in effluent treatment, as a coagulation aid in water treatment [6]. Adsorption is one of the leading technologies for pollutants removal [7][8][9][10][11], and in the case of rock dust, the benefits of rock dust for the adsorption of phosphate ions [12] and as a nickel adsorbent [13] can be highlighted.…”