Removal of copper ions by the filamentous fungus, Rhizopus oryzae from aqueous solution

Thorium biosorption by Aspergillus fumigatus, a filamentous fungal biomass

“…2a and b). Similar kinetic trend have been reported for uptake of metal ions by microbial biomass in earlier studies [26][27][28]. The result indicates that thorium uptake follows a pseudo-secondorder reaction model, which agrees with chemisorption as the rate-limiting step [28].…”

Equilibrium and kinetic studies in adsorption of heavy metals using biosorbent: A summary of recent studies

“…As such, in comparison to pseudo-first-order kinetic this model is considered more appropriate to represent the kinetic data in biosorption systems. This tendency comes as an indication that the rate limiting step in biosorption of heavy metals are chemisorption involving valence forces through the sharing or exchange of electrons between sorbent and sorbate [10,11,21,27,47,50,56,59,64,66,79,96,98,[100][101][102], complexation, coordination and/or chelation [23,40,66]. Yet, it is too early to arrive at the conclusion as a good fitting model does not necessarily illustrate the real nature of the rate-limiting step [52].…”

“…(22)-(24) [6,7,9,21,25,29,40,42,44,48,[50][51][52]54,56,57,59,63,65,67,72,[81][82][83]88,91,[95][96][97][98][99][100]. As-fitted rate constants, predicted equilibrium uptakes along with the corresponding correlation coefficients for all as-summarized biosorption studies are listed in Table 6.…”

Removal of heavy metal ions from wastewaters: A review

“…There are a number of reports involving removal of heavy metals using Rhizopus biomass. Bhainsa and D'Souza (2008) investigated the removal of copper ion using NaOH treated Rhizopus oryzae biomass in a batch reactor. The maximum copper loading capacity of the viable and pretreated biomass was 19.4 and 43.7 mg/g, respectively.…”