Adsorption Kinetics of Lead and Zinc Ions by Coffee Residues

Spent coffee grounds (SCG) immobilized in agarose gel are proposed as a novel binding agent for application in the Diffusive Gradients in Thin films (DGT) technique for the determination of Cd, Cu, Ni, Pb and Zn in waters. The SCG-agarose gel was characterized by Scanning Electron Microscopy, Energy Dispersive X-ray Spectrometry and Porosimetry by nitrogen adsorption. Elution of analytes from the binding agent was effectively performed with 2 mol L −1 HCl. The effects of key DGT parameters (e.g. immersion time, ionic strength and pH) were evaluated with a deployment of DGT devices (DGT-SCG) in synthetic solutions with ionic strengths between 0.005 mol L-1 and 0.1 mol L-1 and within a pH range of 3.5 to 8.0. The results were in excellent agreement with the predicted theoretical curve for mass uptake. Consistent results were found for solutions with ionic strengths between 0.005 mol L-1 and 0.1 mol L-1 and within a pH range of 3.5 to 8.0. The DGT-SCG performance was also evaluated in two spiked river water samples (Corumbataí and Piracicaba river) with satisfactory uptake values (C DGT-SCG /C sol) between 0.74 to 1.53. The proposed DGT-SCG opens opportunities for using residual biomass as binding phase in the DGT technique, showing low costs in production and complying with "green" technology approaches.

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“…6 the use of spent coffee grounds has been reported to uptake As, Cd, Cr (VI), Cu, Pb, Hg, Ni and Zn [25][26][27][28][29][30][31].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Residual biomass of coffee as a binding agent in diffusive gradients in thin-films technique for Cd, Cu, Ni, Pb and Zn measurement in waters

Yabuki

Menegário

Gemeiner

et al. 2019

Talanta

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“…The Adsorbtion of heavy metal Cu2+, Zn2+, Cd2+ and Pb2+ depend on pH [26], and also the temperature affected the the adsorbent to adsorb the lead in the aqueous [27]. The increasing pH dan dosage of coffee residues were increased the removal of heavy metal [28]. The other research showed that coffee powder can adsorb Pb in the aqueous with pH optimum 5-7 [29].…”

Section: Results and Disscusionmentioning

confidence: 99%

The Robusta coffee grounds residues to adsorb the heavy metal Lead (Pb) in the water

Moelyaningrum¹,

Ngibad²,

Lestari³

et al. 2018

Preprint

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This paper has been published in IOP Conf. Series: Journal of Physics: Conf. Ser1i2e3s415161748(9200‘1’8“)”012058 Lead (Pb) were toxic. Lead found in pipes, batteries, paint, dyes ceramic glaze, gasoline, and final waste disposal. The robusta coffee grouds residues had high carbon, nitrogen etc which can adsorb heavy metal.The purpose of this study is to analyze the robusta coffee grounds residues to adsorb the Pb in the water. The method of this research is a True Experimental using completely randomized design (CRD) method. There were control groups (C) and three treatments groups (T1; T2;T3; 5gram/ litre; 8gram/ litre; 10gram/ litre) with six repetitions. The robusta coffee ground residues were contacted for 2 hours.Total samples were24 samples which analyzed each parameter of the Pb with Atomic Adsorption Spectophotometry Analysis. The results showed that the more coffee ground residues that are exposed, increasingly turbid. The KS test showed that data were a normal distribution (sig=0,324). One way ANOVA test; Turkey post Hoc showed that there was sig difference between the control and treatment (F=4,326, Sig= 0,017). There were sig difference between control and treatment 2 and 3 (Sig=0,019; Sig=0,038). Robusta coffee grounds residues can reuse to adsorb the Pb pollution in the water. It can be a solution for treating the lead pollution in the water because of it easy to the application.

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“…No solo el residuo agrícola industrial es usado en el estudio de la eficiencia de la biosorción, también algunos autores optaron por analizar el residuo del café gastado [27,39,40,41,55,56]. Ellos usaron soluciones por separado con concentraciones de Cd, Cr, Cu, Zn, Pb, Hg, As (III) y As (V).…”

Section: B Cinéticas E Isotermas Con Residuos De Caféunclassified

Uso de residuos de café como biosorbente para la remoción de metales pesados en aguas residuales

Flórez

Marulanda

2022

Ing.USBMed

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El presente artículo presenta una revisión de los diferentes residuos del beneficio y consumo de café, usados como material adsorbente en la biosorción de metales pesados de soluciones acuosas. Se esboza en primera instancia particularidades de la biosorción, como los mecanismos de captura de los contaminantes, tipos de materiales adsorbentes, entre ellos los provenientes del café, como las variables que controlan el proceso. En una segunda instancia se plasman investigaciones en relación a la biosorción, en las que se desarrollaron cinéticas químicas para evaluar velocidades de remoción de los metales pesados, e isotermas para determinar tasas o capacidades de adsorción con los residuos de café modificados térmica o químicamente. Se puede señalar que muchos autores han encontrado ventajas competitivas frente al uso de residuos café como la pulpa, borra, mucílago, entre otros, en comparación con adsorbentes convencionales, debido a su propiedades fisicoquímicas los convierten en unos excelentes intercambiadores iónicos , son de alta abundancia debido a la vocación agrícola del país y al alto consumo del café a nivel nacional e internacional, además de su bajo costo y facilidad de manejo y tratamiento, concluyéndose entonces que dichos materiales presentan un futuro promisorio en el tratamiento de efluentes líquidos.

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Adsorption Kinetics of Lead and Zinc Ions by Coffee Residues

Cited by 23 publications

References 16 publications

Residual biomass of coffee as a binding agent in diffusive gradients in thin-films technique for Cd, Cu, Ni, Pb and Zn measurement in waters

Residual biomass of coffee as a binding agent in diffusive gradients in thin-films technique for Cd, Cu, Ni, Pb and Zn measurement in waters

The Robusta coffee grounds residues to adsorb the heavy metal Lead (Pb) in the water

Uso de residuos de café como biosorbente para la remoción de metales pesados en aguas residuales

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