Mechanistic exploration of Ni (II) removal by immobilized bacterial biomass and interactive influence of coexisting surfactants

Abstract

Herein, the adsorption efficiency of biomass based on mutated bacterial strain (Bacillus cereus M 1 16 ) impregnated into calcium alginate towards Ni (II) ions was investigated in batch system. Biomass was characterized by sophisticated instrumental analyses. The influencing process parameters on Ni (II) removal from monometallic system were studied and optimal conditions were ascertained. The performance of such biosorbent on exposure to different metal ions was also evaluated. Especially, this work focused on principal interest in Ni (II) removal in presence of surfactants (Sodium dodecyl sulfate and Triton X-100), where Sodium dodecyl sulfate offered synergetic effect as a function of sorption yield. The best fitted pseudo-second order and film diffusion kinetic model in presence of surfactants provided more suitable prediction reflecting rate controlling steps of Ni (II) removal process. Additionally, experimental data adequately fitted by both Redlich-Peterson and Langmuir-Freundlich dual isotherm model. Thermodynamically the process was found to be spontaneous, endothermic and entropy-driven. Regeneration studies were conducted with a series of five sequential adsorption-desorption cycles. Moreover, biomass proved its worth for effective removal of Ni (II) from simulated inorganic wastewater. Thus, this green chemical approach may have immense potential to be explored in the actual system.

Biosorption of Iron (II) by <i>Lactobacillus fermentum</i> from Aqueous Solutions

“…This indicates a predominantly amorphous nature favorable for metal ion binding to the biosorbent [51,52]. Biosorption of metals to the biomass results in a change of relative intensity as reported in earlier studies [53,54]. Hence a shift in 2θ (19.8740) and d-spacing values (4.46379) indicates a change in crystallinity due to metal ion biosorption.…”

Biosorption of acid yellow-99 using mango (Mangifera indica) leaf powder, an economic agricultural waste

“…high operating cost, non-eco-friendly nature and generation of toxic secondary by-products [4,14,45]. In this regard, biosorption has become an eco-friendly viable substitute and has been found to be superior to conventional processes in recent years [34,39]. This technology is primarily based on biomaterials to decontaminate colourants from an aqueous medium [52,53].…”

Enhanced cadmium removal by growing Bacillus cereus RC-1 immobilized on different magnetic biochars through simultaneous adsorption and bioaccumulation

“…In addition, these maximum capacities were also comparable to the values (4.05-60. 24 ATPase inhibitor, immobilized bacteria persistently kept strong biosorption capacity for Cd 2+ with the ranges of maximum biosorption capacity between 43.29 and 71.63 mg/g, but free bacteria were signi cantly inhibited to the Cd 2+ uptake of 4.68 mg/g (Fig. 4D).…”