The adsorption behavior and mechanism investigation of Pb(II) removal by flocculation using microbial flocculant GA1

Feng, Jie; Yang, Zhen; Zeng, Guangming; Huang, Jing; Xu, Haiyin; Zhang, Yuanyuan; Wei, Shumei; Wang, Like

doi:10.1016/j.biortech.2013.09.011

Cited by 92 publications

(43 citation statements)

References 30 publications

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“…The positive values of ΔH°indicated that the sorption was an endothermic process in the temperature range from 25 to 45°C. The positive values of ΔS°confirmed the increased randomness at solid/solution interface during the flocculation process (Feng et al 2013;Guo and Yu 2014).…”

Section: Kinetics Isotherms and Thermodynamics Parameterssupporting

confidence: 71%

“…These results suggested that the sorption of Cu(II) onto MBFR10543 followed well the pseudo-second-order model. Thus, experiment results supported the assumption that the rate limiting step in sorption of heavy metals are chemisorption involving valence forces through the sharing or exchange of electrons between adsorbent and metal ions (Feng et al 2013). Additionally, it is worthwhile to note that k 1 and k 2 have higher values at a higher initial Cu(II) concentration, which leads to a higher driving force for the sorption of Cu(II) hence a higher sorption capacity.…”

Section: Kinetics Isotherms and Thermodynamics Parametersmentioning

confidence: 53%

“…Within the studied temperature range (25, 35, and 45°C), it appears that the Langmuir model acceptably fits the experimental results over the experimental range with good coefficients of regression (based on the higher correlation coefficient, i.e., R 2 values). From Langmuir model, the q m values decreased with the rising temperature; this suggested the affinity between the active sites of the MBFR10543 and Cu(II), and also between the adjacent molecules of the adsorbed phase would be stronger at higher temperature in comparison to lower temperature (Feng et al 2013;Ghorai et al, 2012). Additionally, all R L values obtained were between 0 and 1 indicated the removal of Cu(II) by MBFR10543 was propitious; this implied that the Langmuir equation was able to properly describe the equilibrium isotherm of Cu(II) adsorbed onto MBFR10543.…”

Section: Kinetics Isotherms and Thermodynamics Parametersmentioning

confidence: 94%

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Characteristics and mechanisms of Cu(II) sorption from aqueous solution by using bioflocculant MBFR10543

Guo

2014

Appl Microbiol Biotechnol

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This paper investigated the characteristics of Cu(II) sorption from aqueous solution by using bioflocculant MBFR10543 and discussed the mechanism during the sorption process. Results have demonstrated that the removal efficiency of Cu(II) reached 96.9% by adding MBFR10543 in two stages, separately, 1.5 × 10(-2) % (w/w) in the 1.0-min rapid mixing (180 rpm) and 2.0 × 10(-2) % (w/w) after 2.0-min slow mixing (80 rpm), with pH value fixed at 6.0. Cu(II) sorption process could be described by the pseudo-second-order kinetic model and the Langmuir isotherms model. The negative Gibbs free energy change indicated the spontaneous nature of the sorption. Fourier transform infrared spectra analysis indicated that functional groups, such as -OH, -COOH, C═O, and -NH2, were existed in MBFR10543 molecular chains, which had strong capacity for removing Cu(II). Furthermore, both charge neutralization and bridging being the main mechanisms involved in Cu(II) removal by MBFR10543.

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Section: Kinetics Isotherms and Thermodynamics Parameterssupporting

confidence: 71%

Section: Kinetics Isotherms and Thermodynamics Parametersmentioning

confidence: 53%

Section: Kinetics Isotherms and Thermodynamics Parametersmentioning

confidence: 94%

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Characteristics and mechanisms of Cu(II) sorption from aqueous solution by using bioflocculant MBFR10543

Guo

2014

Appl Microbiol Biotechnol

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“…TL-3 bacteria for Pb 2+ removal (Batta et al 2013). Moreover, Feng et al (2013) showed that the results of Pb 2+ adsorption by microbial flocculant GA1 could be described by the Langmuir adsorption model, and being the monolayer capacity negatively affected with an increase in temperature and the adsorption process could be described by pseudo-second-order kinetic model.…”

Section: + ) Removalmentioning

confidence: 99%

“…The fact that these bio-flocculants have higher efficiencies at low metal concentrations makes them very attractive for the removal of heavy metals from industrial effluents/wastewaters (Kotrba et al 1999). Feng et al (2013) …”

Section: Introductionmentioning

confidence: 99%

Removal of Heavy Metals Using Bacterial Bio-Flocculants of Bacillus Sp. And Pseudomonas Sp.

Azzam

Tawfik

2015

Journal of Environmental Engineering and Landscape Management

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Abstract. Trinitrotoluene (TNT), a commonly used explosive for military and industrial applications, can cause serious environmental pollution. 28-day laboratory pot experiment was carried out applying bioaugmentation using laboratory selected bacterial strains as inoculum, biostimulation with molasses and cabbage leaf extract, and phytoremediation using rye and blue fenugreek to study the effect of these treatments on TNT removal and changes in soil microbial community responsible for contaminant degradation. Chemical analyses revealed significant decreases in TNT concentrations, including reduction of some of the TNT to its amino derivates during the 28-day tests. The combination of bioaugmentation-biostimulation approach coupled with rye cultivation had the most profound effect on TNT degradation. Although plants enhanced the total microbial community abundance, blue fenugreek cultivation did not significantly affect the TNT degradation rate. The results from molecular analyses suggested the survival and elevation of the introduced bacterial strains throughout the experiment. Keywords: TNT, bioaugmentation, biostimulation, phytoremediation, microbial community.

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The synthesis of modified alginate flocculants and their properties for removing heavy metal ions of wastewater

Tian

Zhang

Shi

et al. 2018

J of Applied Polymer Sci

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A new flocculant was synthesized through the modification of sodium alginate with thiosemicarbazide. In the preparation, amino thiourea groups which had excellent adsorption properties for heavy metal ions were introduced to the flocculant. The structure of the flocculant was confirmed by elemental analysis, Fourier transform infrared, UV spectrophotometry, nuclear magnetic resonance, and thermal analysis. The flocculation behaviors of the flocculant for three heavy metal ions were investigated. The results showed that the removal rates of the flocculant for Pb2+, Cd2+, and Cu2+ reached up to 97.8%, 86.3%, and 80.0%, respectively, and the flocculation capacities were as high as 489, 215, and 160 mg/g, respectively. The excellent adsorption was ascribed to the double effects of electronic interaction and chelation between the flocculant and heavy metal ions. The flocculant had particular flocculation selectivity for Pb2+ in the mixed heavy metal ion solutions containing Cd2+or Cu2+, respectively. The flocculation process corresponded to Langmuir isotherm model, the flocculation kinetics agree with pseudo second order. The flocculant had potential applications for treatment of wastewater. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46577.

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The adsorption behavior and mechanism investigation of Pb(II) removal by flocculation using microbial flocculant GA1

Cited by 92 publications

References 30 publications

Characteristics and mechanisms of Cu(II) sorption from aqueous solution by using bioflocculant MBFR10543

Characteristics and mechanisms of Cu(II) sorption from aqueous solution by using bioflocculant MBFR10543

Removal of Heavy Metals Using Bacterial Bio-Flocculants of Bacillus Sp. And Pseudomonas Sp.

The synthesis of modified alginate flocculants and their properties for removing heavy metal ions of wastewater

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