Biosorptive Abatement of Cd²⁺ by Water Using Immobilized Biomass of Arthrobacter sp.: Response Surface Methodological Approach

Abstract

The present study deals with the successful utilization of bacterial biosorbent Arthrobacter sp. for the removal of Cd(II) ion from water in a batch and a continuous system. The maximum uptake capacity of free and immobilized biomass in batch system was 270.27 and 188.67 mg/g, respectively. The maximum removal percentage Cd 2+ of 88.9% was obtained at flow rate of 1.0 mL/min and 19 cm bed height in the column system. The bed depth service time (BDST) model was applied, which was found to be in good agreement with the experimental data with high correlation coefficient (>0.997) and low chi-square value (>1.62). Thomas and Yoon-Nelson models were also applied to the experimental data, and the Yoon-Nelson model provided a better description of experimental kinetic data in comparison to the Thomas model. Column regeneration studies were also carried out using 0.1 mol/L HCl as desorbent for seven sorption-desorption cycles. Furthermore, an attempt has been made to optimize the process conditions for the maximum removal using the central composite design, and the result predicted by optimization plots was 89.64%, which is close to the experimental data, that is, 88.9% at the same process conditions.

Valorization of the Spent Biomass of Pleurotus mutilus Immobilized as Calcium Alginate Biobeads for Methylene Blue Biosorption

“…These results showed that the immobilization procedure has no apparent effect on the surface area of the initially used free biomass. Similar results were found by Hasan and Srivastava (2010) with free and calcium alginate immobilized Arthrobacter sp. They found the BET area surfaces to be 2 and 2.3 m 2 /g, respectively.…”

Optimization of banana trunk-activated carbon production for methylene blue-contaminated water treatment

“…It can facilitate an inspection of experimental factors in selected responses like adsorption capacity (Hasan and Srivastava 2011;Danish et al 2014b). Therefore, 3D response surface curves were plotted for a statistically significant model to explore the interaction of variables on the adsorption capacity of the produced activated carbon.…”

Composite of biomass and lead resistent Aspergillus oryzae for highly efficient aqueous phase Pb(II) adsorption

“…As demonstrated in Figure 8 and Table 3, the results indicated that the breakthrough time (t b ) and the exhaustion time (t e ) of compound biosorbents were significantly delayed compared with the single biosorbents. Comparing with the data of PSH, MCH fixed bed system showed a larger q exp and shorter H. Height of mass transfer zone (H) is the reflection of mass transfer resistance of fixed bed, the shorter H means less mass transfer resistance and more utilization efficiency of fixed bed [35,36]. This result proved that combining with HA is an effective way to improve the fixed bed adsorptive capacity of biosorbent.…”