The application of a micro-algal/bacterial biofilter for the detoxification of copper and cadmium metal wastes

Loutseti, S.; Danielidis, Daniel B.; Economou‐Amilli, Athena; KATSAROS, C.; Santas, Regas; Santas, Ph.

doi:10.1016/j.biortech.2008.11.019

Cited by 71 publications

(21 citation statements)

References 35 publications

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“…Relevant processes include electroplating, metal finishing, metallurgical work, tanning, chemical manufacturing, and battery manufacturing [3,4]. Due to their non-biodegradability, they tend to accumulate in the vital organs of living organisms causing various diseases and long-term disorders, as well as deleterious ecological effects [5]. Some heavy metals are also known to be carcinogens.…”

Section: Introductionmentioning

confidence: 99%

Green walnut shell as a new material for removal of Cr(VI) ions from aqueous solutions

Zafarani

Bahrololoom

Noubactep³

et al. 2015

Desalination and Water Treatment

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A B S T R A C TThe removal of aqueous hexavalent chromium (Cr(VI)) by green walnut shell (GWS) was investigated in batch experiments. GWS is a readily available and low-cost horticulture solid waste. The efficiency of this biomass for Cr(VI) removal as impacted by various operational parameters was characterized. Tested parameters are: initial solution pH (pH 0 ), initial GWS mass loading ([GWS] (g L − 1 )), contact time (t (min)), GWS particle size (d (μm)), initial Cr(VI) concentration ([Cr(VI)] 0 (mg L − 1 )), and ionic strength (I(M)). Results revealed that Cr(VI) chemical reduction (to Cr(III)) followed by adsorption or surface precipitation is the removal mechanism. The optimal operational conditions for Cr(VI) removal from 50 mL of a [Cr(VI)] 0 = 10 mg L −1 solution were: pH 0 = 3.6, t = 5 min, [GWS] = 6 g L −1 , and I = 0.1 M. The corresponding removal efficiency was 95%. The kinetic of the reaction was also studied. Results indicate that using GWS is an affordable, efficient, and applicable method for aqueous Cr(VI) removal and thus a low-cost material for water treatment.

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Section: Introductionmentioning

confidence: 99%

Green walnut shell as a new material for removal of Cr(VI) ions from aqueous solutions

Zafarani

Bahrololoom

Noubactep³

et al. 2015

Desalination and Water Treatment

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“…Biomasses of the cyanobacterium Arthrospira platensis and the microalga Chlorella vulgaris were studied in the removal of toxic metals such as lead [12,13], zinc [13,14], nickel [13,15], copper [16,17], cadmium [18,19] and chromium [20,21]. Unfortunately, however, most of the available information regards only single component systems.…”

Section: Introductionmentioning

confidence: 99%

Metal biosorption onto dry biomass of Arthrospira (Spirulina) platensis and Chlorella vulgaris: Multi-metal systems

Rodrigues

Ferreira

Carvalho

et al. 2012

Journal of Hazardous Materials

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“…An adsorption efficiency of 97% is obtained at 32 h. This percentage of adsorption agrees the reported for Pb (II) adsorption using Sargassum filipendula [29]; in that work a removal efficiency of 96% was reached. In another study, the removal percentage of Cu (II) was 80% at four days, considering an initial concentration of 200 ppm, using as adsorbent a microalgae/bacteria system [30]. CONCLUSION Immobilization of P. koreensis was corroborated by SEM and EDS analysis.…”

Section: Biosorption Of Cr In Batch Assaysmentioning

confidence: 79%

Bioadsorption of Cr (VI) in aqueous solutions by pseudomonas koreensis immobilized in alginate beads

Torres¹,

Hernández²,

Jiménez³

2019

Int. J. EI

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Water pollution by Cr is challenging due to its high toxicity. Most of chromium is released by industrial processes. Different methods have been developed to remove heavy metals from water, but they are expensive and not efficient for low concentrations. Microorganisms have received attention since they are able to grow in stress conditions. Bacteria living in water bodies near to mining are resistant to heavy metals; then, they have potential for bioadsorption applications. The purpose of this work was to isolate a microorganism tolerant to Cr from water bodies near to a mining zone. The isolated, Pseudomonas koreensis, was immobilized in alginate beads and its efficiency to remove Cr from water was evaluated. For isolation, serial dilution of samples was conducted; microorganisms were cultured in EMB, MacConkey and Mannitol salt agar and incubated at 30-35 °C for 24 h. The dominant colonies were replanted in nutrient agar supplemented with chromium and they were incubated at 30-35 °C until growth evidence. Species identification was done according to Bergey's Manual and by 16 S rDNA sequencing. Alginate beads were prepared by slow continuous deposition method. Isolated bacteria were set in batch reactors together with alginate beads and nutrient medium to promote microorganism immobilization. The biofilm presence was confirmed through SEM. A random experimental design was used to determine the best amount of adsorbent in lab scale batch reactors. The concentration was taken as variable considering 15, 25 and 40 g. Temperature, pH, stirring and concentration of Cr (VI) were fixed at 30°C, 6.6, 150 rpm and 10 ppm, respectively. Samples from 0 to 56 h were taken. A variance analysis was performed. Chromium removal of 97% at 32 h was reached. Significative difference was observed related to adsorbent concentration and time. The best results correspond to 40 g of adsorbent.

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The application of a micro-algal/bacterial biofilter for the detoxification of copper and cadmium metal wastes

Cited by 71 publications

References 35 publications

Green walnut shell as a new material for removal of Cr(VI) ions from aqueous solutions

Green walnut shell as a new material for removal of Cr(VI) ions from aqueous solutions

Metal biosorption onto dry biomass of Arthrospira (Spirulina) platensis and Chlorella vulgaris: Multi-metal systems

Bioadsorption of Cr (VI) in aqueous solutions by pseudomonas koreensis immobilized in alginate beads

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