Biodegradation of Phenol Using the Indigenous Rhodococcus pyridinivorans Strain PDB9T NS-1 Immobilized in Calcium Alginate Beads

Green synthesis of a potential magnetic and mesoporous EG-nZVI/CA-MCM41 nanocomposite for reductive sorption of europium

“…The Freundlich constant K f (150.76 mg 1− n L n g −1 ) suggests a strong adsorption intensity and high affinity of Eu( iii ) onto the adsorbent, much higher than that reported for other NMs. 28,42,75 The D–R adsorption isotherm, with a reasonably similar fitness to the Freundlich model, could have been an alternate choice. However, the corrected D–R isotherm adopted in this study includes the solubility of Eu( iii ) as an additional parameter to be estimated from the experimental data set.…”

“…The variable parameters are K i , which stands for adsorption capacity, and n , which stands for a heterogeneity factor associated with the intensity of sorption; n <1 implies adsorption that is favourable. 41,42 In the adsorption process, the Temkin isotherm takes into account indirect interactions between adsorbate and adsorbent 5 and is given by eqn (6). Unlike the Freundlich model, this isotherm predicts that with increased surface coverage, the adsorption energy decreases linearly. q e = B ln A + B ln C e where B refers to the surface capacity for contaminant adsorption per unit binding energy, and A (l mg −1 ) is the equilibrium constant adsorption potential.…”

“…In the second stage, adsorbates in the solution might travel to the pores of the adsorbent “as a new adsorbent” with a residual adsorption capability after intraparticle diffusion in pores is interrupted. 42…”

“…(11) The intraparticle diffusion (IPD) model, also referred to as the "Weber-Morris model", describes the intraparticle diffusion properties of adsorbate ions on a porous sample. 42,52 Although two different mathematically inconsistent forms of IPD models, i.e., q t = kt 1/2 or q t = k + kt 1/2 , are widely adopted in the literature, division data points to trace the shifting of adsorption rate from linearized plots is arbitrary. In this study, we adopted a recently proposed piecewise continuous IPD model, 53 as in eqn (12).…”

Highly recyclable and stable CdS-alginate hydrogel beads towards prevention of oxidative release of nanoparticles in complete photocatalytic disinfection of multidrug-resistant Escherichia coli

“…Cell immobilization in Ca-alginate has been used and is a simple and inexpensive method. 28 This study demonstrates the entrapment of CdS NRs in a porous polymeric alginate bead (AB) hydrogel in order to overcome these problems. We try to take advantage of the porosity of Ca-alginate, which allows pathogenic bacteria-containing solutes to enter the beads and interact with highly effective encapsulated photocatalytic CdS NRs.…”