Removal of iron, zinc, and nickel-ions using nano bentonite and its applications on power station wastewater

Abstract

Removal of high concentrations of toxic heavy metals from wastewater is very important within the environmental field because heavy metals pollution a serious environmental problem due to them being nonbiodegradable. This study shed some light on the use of Nano bentonite as an adsorbent for the elimination of Iron, Zinc, and Nickel ions from wastewater, and the optimum conditions were evaluated to find out thermodynamic and kinetic parameters and equilibrium adsorption models have been applied. The results showed that adsorption percentage increases with increasing temperature, speed of rotation, and volume of solution, but decreases with adsorbent dose and initial concentration increase. The adsorption process has fit pseudo-second-order kinetic model Langmuir and Freundlich adsorption isotherm models were applied to analyze adsorption data and both were found to apply to these adsorption processes. Thermodynamic parameters e.g., ΔG o , ΔS o , and ΔH o of the adsorption process were found to be endothermic. Finally, the Nano bentonite was observed to be more powerful for the removal of Fe (III), Zn (II), and Ni (II) at the same experimental conditions.

A unique, inexpensive, and abundantly available adsorbent: composite of synthesized silver nanoparticles (AgNPs) and banana leaves powder (BLP)

“…Pseudo-second-order reaction measures the metal ions adsorbed at time t and that adsorbed at equilibrium on the adsorbent surface [ 56 , 57 ]. It is represented by Eq.…”

Conversions of Cement bypass waste to Nano-hydroxyapatite exploited in water purification

“…and Mn(II) uptake by Kiln-HA samples is intricate and may be explained by several mechanisms (Moreno, et al, 2010). The maximum adsorption capabilities (q max ) were found to be between 147 and 175 mg.g − 1 for Fe (III) whereas varied from 204 to 344 mg.g − 1 to Mn(II).The values of (q max ) were greater than those of other hydroxyapatite-adsorbent materials previously published (Ahmed et al, 2021). The R L value in Langmuir model ranges between 0 and 1 re ected the favorable adsorption process of Fe (III) and Mn (II) ions onto Kiln-HA (Qian et al, 2014).…”

One-step synthesis of super-absorbent nanocomposite hydrogel based on bentonite

“…The basic distance d 001 is 13.04 Å when the compensating cation is Ca 2+ or Mg 2+ in the central layer of bentonite. When Al 3+ is replaced by H + for the lower bentonite layer spacing and Ca 2+ or Mg 2+ cations are replaced by Na + , this value was lowered to 9.9 Å, resulting in a microporous of bentonite [27,28]. Results from the XRD diagram (figure 1(b)) also show that the peak characteristic for d 110 of the NB5 has a greater intensity than the peak d 110 of the NB10 and NB20 samples.…”

“…Dolomite (CaMg(CO 3 ) 2 ) is represented by the values of 2θ = 31°. The peak at 2θ value of 29.5°stand for calcite (CaCO 3 ) [26,27]. Due to the purification process, NB has less quartz, feldspar, and calcite and more clay minerals (montmorillonite and kaolinite) than Ben.…”