Elimination of organic water pollutants using adsorbents obtained from sewage sludge

Otero, Marta; Rozada, F.; Calvo, Luis Fernando; Garcı́a, Ana; Morán, Antonio

doi:10.1016/s0143-7208(03)00005-6

Cited by 194 publications

(90 citation statements)

References 12 publications

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“…The Freundlich model (r 2 values were in the range of 0.990-0.991) yielded the best fit for the data. The Freundlich parameter Kf is relative to the adsorption capacity and n refers to the process intensity [6]. The adsorbate will be easily adsorbed when the constant n is greater than 1.00 [22].…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…Activated carbon adsorption has been recognized as the most effective method, producing good-quality effluents that have low concentrations of dissolved organic compounds in wastewater from pharmaceutical manufacturing [4]. Due to the high operational cost of the traditional activated carbon adsorption techniques, many low cost adsorbents have been used to remove various pollutants [5][6][7][8]. Among these adsorbents, bamboo biochar has shown promising application for the removal of organic pollutants [5].…”

Section: Introductionmentioning

confidence: 99%

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Adsorptive Removal of Fluoroquinolone Antibiotics Using Bamboo Biochar

Wang

Lü

et al. 2015

Sustainability

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Abstract:The occurrence of fluoroquinolone antibiotics in wastewater has drawn great attention. Adsorption of widely used fluoroquinolone antibiotics (enrofloxacin and ofloxacin) in wastewater using bamboo biochar was investigated. More than 99% of fluoroquinolone antibiotics were removed from the synthetic wastewater through adsorption. Adsorption capacities of bamboo biochar slightly changed when pH increased from 3.0 to 10.0. The adsorption capacity of bamboo biochar increased sharply when the initial concentration of enrofloxacin or ofloxacin increased from 1 to 200 mg L

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Section: Adsorption Isothermmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Adsorptive Removal of Fluoroquinolone Antibiotics Using Bamboo Biochar

Wang

Lü

et al. 2015

Sustainability

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“…La adsorción con diferentes materiales absorbentes de bajo costo, se ha visto como una tecnología eficaz para la remoción de trazas de contaminantes en soluciones acuosas [9]. Actualmente existe una alta generación de desechos agrícolas de bajo costo [10], algunos de estos desechos agrícolas son la cáscara de arroz, la cáscara de coco, la cáscara de tamarindo, la cáscara de yuca, entre otros [11], los cuales mediante una modificación física o química han dado muy buenos resultados en procesos de adsorción de colorantes [12].…”

Section: Introductionunclassified

Removal of methylene blue from aqueous solutions using cassava peel (Manihot esculenta) modified with phosphoric acid // Remoción de azul de metileno de soluciones acuosas utilizando cáscara de yuca (Manihot esculenta) modificada con ácido fosfórico

2017

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Remoción de azul de metileno de soluciones acuosas utilizando cáscara de yuca (Manihot esculenta) modificada con ácido fosfóricoRemoción de azul de metileno de soluciones acuosas utilizando cáscara de yuca (Manihot esculenta) modificada con ácido fosfórico RESUMENEste trabajo reporta la modificación de la cáscara de la yuca con ácido fosfórico para la remoción de azul de metileno de soluciones acuosas. Se utilizó una metodología experimental con diseño compuesto central 3^2+estrella, variando la temperatura de modificación de la cáscara de yuca (113°C a 127°C), la relación biomasa-ácido fosfórico (1:0.5 a 1:1.5) y la concentración inicial del colorante (100 a 800 mg/L), utilizando como variables de respuesta el porcentaje de remoción y la capacidad de adsorción. Se encontró que, para el porcentaje de remoción del colorante, la variable más importante es la temperatura y que la capacidad de adsorción se favorece a concentraciones altas de colorante. La cáscara de yuca modificada a la temperatura más alta (127°C) y relación másica de biomasa-ácido 1:1 presentó mayores valores tanto para el porcentaje de remoción como para la capacidad de adsorción, los cuales fueron de 99.984% y 79.975 mg/g, respectivamente. La cinética de adsorción se ajustó al modelo de pseudo segundo orden lo cual sugiere que el proceso se realiza por quimisorción, además, ajustó con las isotermas de Freundlich, lo que sugiere que la adsorción se realiza en múltiples capas.Palabras clave: Cáscara de yuca; Azul de metileno; Remoción; Adsorción; Cinética; Isotermas de equilibrio. ABSTRACTThis work reports the modification of cassava peel using phosphoric acid for the removal of methylene blue from aqueous solutions. A central composite design 3^2+star was employed using as manipulated variables the temperature of modification (113 ° C to 127 ° C), the biomass-phosphoric acid ratio (1: 0.5 to 1: 1,5) and the initial concentration of dye (100 to 800 mg/L); the response variables of the experiment were the percentage of removal and the adsorption capacity. It was found that for the percentage of removal of dye, the most important variable is the temperature, and that the adsorption capacity is favored at high concentrations of dye. The cassava peel modified at the highest temperature (127 ° C) and biomass:acid mass ratio 1:1 showed higher values for both the removal percentage and the adsorption capacity, which were 99.984% and 79.975 mg/g, respectively. The adsorption kinetics was best adjusted to a pseudo second order kinetic model, which indicates that the process is carried out by chemisorption, also, the process was adjusted to Freundlich isotherms, indicating that the adsorption is carried out in multiple layers.

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“…The free availability and high biosorption capacity of activated sludge have been attributed to the presence of a large number of binding sites on the cell walls of microbes because they are composed mainly of polysaccharides, proteins and lipids. Over the past few years, several studies have reported the potential for applying dried aerobic and anaerobic sludge for the biosorption of dyes and other hazardous materials from different effluents (Caner et al 2009;Ju et al 2008;Otero et al 2003). In recent years, a few researchers have examined the potential of living anaerobic activated sludge biosorption for the treatment of effluent (Qiu et al 2012;Wang et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Characteristics, kinetics and thermodynamics of Congo Red biosorption by activated sulfidogenic sludge from an aqueous solution

Rasool

Lee

2013

Int. J. Environ. Sci. Technol.

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The kinetics and thermodynamics of the biosorption of textile dye Congo Red on anaerobic activated sulfidogenic sludge were examined. The influence of different adsorption parameters such as pH, temperature, contact time and initial dye concentrations on the biosorption capacity was also investigated. The sulfidogenic sludge showed a maximum biosorption density of 238.90 mg dye/g cell for Congo Red at an initial dye concentration of 1,000 mg/L, pH 3.5 and 22°C, which is higher than that of many other adsorbents reported in the literature. The biosorption processes obeyed the Langmuir isotherm and exhibited pseudo-second-order rate kinetics. The thermodynamic parameters indicated the spontaneous and exothermic nature of Congo Red biosorption. The Fourier transform infrared spectra revealed the dye interaction with the biomass. Scanning electron microscopy showed significant changes in the surface morphology of the sludge after dye biosorption. These results showed that sulfidogenic sludge biomass is an attractive alternative low-cost biosorbent for the removal of the dye from aqueous media.

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Elimination of organic water pollutants using adsorbents obtained from sewage sludge

Cited by 194 publications

References 12 publications

Adsorptive Removal of Fluoroquinolone Antibiotics Using Bamboo Biochar

Adsorptive Removal of Fluoroquinolone Antibiotics Using Bamboo Biochar

Removal of methylene blue from aqueous solutions using cassava peel (Manihot esculenta) modified with phosphoric acid // Remoción de azul de metileno de soluciones acuosas utilizando cáscara de yuca (Manihot esculenta) modificada con ácido fosfórico

Characteristics, kinetics and thermodynamics of Congo Red biosorption by activated sulfidogenic sludge from an aqueous solution

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