ESTUDOS DE EQUILÍBRIO NA SORÇÃO DE Cr(III) POR GRANULADOS BIOCLÁSTICOS

Veneu, Diego Macedo; Yokoyama, Lídia; Cunha, Osvaldo Galvão Caldas da; Schneider, Cláudio Luiz; Monte, Marisa Bezerra de Mello

doi:10.15628/holos.2016.5098

Cited by 1 publication

(2 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The red marine algae (Lithothamnium calcareum), whose main feature includes the presence of calcium carbonate in its cell walls, has a high adsorptive potential for metal ions (Veneu et al, 2016;2018). In addition to having a porous structure, which gives it a high specific surface and suggests its application in the adsorption of metal ions of industrial effluents, advantages such as wide availability, low cost and the possibility of reuse of biomass have been attributed to Lithothamnium calcareum (Bilal et al, 2018;Cheng et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…In addition to having a porous structure, which gives it a high specific surface and suggests its application in the adsorption of metal ions of industrial effluents, advantages such as wide availability, low cost and the possibility of reuse of biomass have been attributed to Lithothamnium calcareum (Bilal et al, 2018;Cheng et al, 2019). Veneu et al (2016) applied Lithothamnium calcareum in the treatment of aqueous solutions containing Cr and obtained 99.9% removal of the element. Ibrahim et al (2016) evaluated the adsorption of Cd, Cr and Cu to marine algae Ulva lactuta and confirmed the potential use of the algae in the removal of trace elements from aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption of metal ions in red marine algae Lithothamnium calcareum in the treatment of industrial effluents

Silva¹,

Oliveira²,

Franco³

et al. 2021

Rev. ambiente água

View full text Add to dashboard Cite

This study investigated the adsorption capacity of the elements Chromium (Cr), Manganese (Mn) and Zinc (Zn) to marine algae Lithothamnium calcareum by means of adsorption kinetics and batch adsorption tests, with a view to the development of a simple technique for the treatment of effluents that have a high concentration of metal ions. The algae was sieved, washed and subjected to treatment. In the adsorption kinetics, 0.2 g of algae was weighed, an amount transferred to 125 mL Erlenmeyer flasks, to which was added 15 mL of solution with a concentration of 5 mg L-1 of the metal ion. The flasks were stirred at 60 rpm for 240 minutes. In batch adsorption, 0.2 g of algae was weighed, amount transferred to 125 mL Erlenmeyer flasks, to which was added 15 mL of solution with concentrations of 5, 10, 20, 50, 100, 250 e 500 mg L-1 of the metal ion. The flasks were stirred at 60 rpm for 24 hours. In the two tests, the supernatant solutions collected were centrifuged at 2000 rpm for 5 minutes and the equilibrium concentrations of metal ions were determined by atomic absorption spectrometry. It was found that, in 240 minutes of contact, the Lithothamnium calcareum removed 15.5% of Cr, 33.0% of Mn and 8.0% of Zn in solution; and that in 24 hours of contact, at a concentration of 5 mg L-1, it removed 0.4% of Cr, 52.5% of Mn and 92.6% of Zn; and, at a concentration of 500 mg L-1, it removed 20.0% of Cr, 22.6% of Mn and 40.8% of Zn. The results showed that the Lithothamnium calcareum submitted to thermochemical treatment presented potential for use in the adsorption of Cr, Mn and Zn.

show abstract

Section: Introductionmentioning

confidence: 99%