Isotherm and kinetic studies of cadmium biosorption and its adsorption behaviour in multi-metals solution using dead and immobilized archaeal cells

Abstract

It is crucial to identify more biological adsorbents that can efficiently uptake metals from wastewater. Dry haloalkaliphilic archaea Natronolimnobius innermongolicuswas evaluated for Cd ions biosorption. The optimal operating conditions (pH, biomass dose, initial metal concentration, contact time, and isotherms models) were tested. Biosorption process is influenced by the metal's solution pH with maximum removal of 83.36% being achieved at pH 8. Cadmium ions uptake reaches equilibrium in about 5 min of biosorption process. The Langmuir model was determined to better fit the Cd(II) biosorption by dry archaea. The maximal uptake capacity (qmax) of Cd(II) was 128.21 mg/g. The effect of multi-component system on biosorption behaviour of Pb, Ni, Cu, Fe, and Cd ions by immobilized dried archaeal cells, dried archaeal cells, and dried bryozoa was studied using Plackett–Burman experimental design. The investigated biosorbents were effective at removing metals from contaminated systems, particularly for Fe, Pb, and Cd ions. Moreover, the interaction behaviour of these metals was antagonistic, synergistic, or non-interactive in multi-metals system. SEM, EDX, and FTIR spectra revealed changes in surface morphology of the biomass through the biosorption process. Finally, continuous adsorption experiment was done to examine the ability of immobilized biomass to adsorb metals from wastewater.

Unlocking Cd(II) biosorption potential of Candida tropicalis XTA 1874 for sustainable wastewater treatment

“…The parameter pH had profound influence in regulating the ionization properties of the functional groups on the adsorbent surface and solution chemistry of the metal ion 81 . After the optimum pH , biosorption capacity decreased a while because not surface adsorption but precipitation of metal hydroxides plays the predominant role 82 . Inoculum volume which influenced dry cell mass also had keen effect on the process but beyond the optimum value biosorption decreased.…”

“…Desorption efficiency ( %) and reusability of the biomass plays a pivotal role in making the water treatment as a cost effective process 82 , 101 . It is evident from (Table 7 , Fig.…”

Bio-adsorption of heavy metals from aqueous solution using the ZnO-modified date pits

“…In the latest development, the bio-adsorption technology using bio-based materials as the adsorbents (bio-adsorbents) has emerged and has become significant in the field 14 , including the removal of heavy metals in solution 15 . Different from adsorption, biosorption applies biological materials as the adsorbents 16 . A few bio-adsorbents (e.g., raw orange peel 15 , modified sugarcane bagasse 17 , modified oak sawdust 18 , modified Lignin 19 , modified sunflower stalks 20 , peanut hull 21 , dehydrated wheat bran 22 , maize leaf 11 , hazelnut shells 23 , Pinus bark 24 , banana and orange peels 25 , modified sugar beet pulp 26 , modified corncob 27 , Schleichera oleosa bark 28 , and bottlebrush plant seeds 29 ) show the adorability for a wide range of heavy metals.…”

Effective Removal of Cd(II) from Aqueous Solutions Using Theobroma cacao Agro-Industrial Waste

“…There are traditional methods to remove cadmium from contaminated aqueous solutions: filtration, ion exchange, chemical oxidation or reduction, chemical precipitation, evaporative recovery, and electrochemical treatment [ 3 , 8 ]. However, these methods are not very effective for contaminated aqueous solutions with Cd concentrations below 100 mg L −1 [ 9 ]. In this context, the use of specific biomass becomes an effective, economical, and easy-to-operate alternative [ 10 ].…”