Microporous Activation Carbon Made of Sawdust From Two Forestry Species for Adsorption of Methylene Blue and Heavy Metals in Aqueous System – Case of Real Polluted Water

“…The concentrations of the heavy metals Zn, Pb, Cd and Cu were determined using an ICP (Perkin Elmer Optimal Emission Spectrometer Optima 4300 DV) with an inductive coupling plasma technique, with quantification limits of 0.05, 0.0008, 0.005 and 0.006 mg/L for Zn, Pb, Cd and Cu, respectively. The recovering percentage maintained at 99.5% (12).…”

Section: Heavy Metals Determinationmentioning

confidence: 87%

First study of water quality in the San Camilo and Mojahuevo estuaries located in Guayas for being used in aquaculture

et al. 2021

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The water quality of the San Camilo and Mojahuevo estuaries was monitored in the months of April (rainy season) and June (dry season) of 2016. The water of the Mojahuevo estury presented in both seasons the lowest values of turbidity between 17.20 and 33.70 UNT, biochemical oxygen demand being in a range between 14.00 and 19.00 mg/L, zinc content (0.02-0.05 mg/L) and copper content (0.07 mg/L), ammonia content (0.21-0.35 mg/L), fats and oils (0.23-0.29 mg/L), phosphates (0.39-2.34 mg/L) and nitrates (0.84-2.29 mg/L), while the water of the two estuaries San Camilo and Mojahuevo (rainy season) showed similar phenolic content (0.019 mg/L). The results showed that the Mojahuevo estuary presented the high quality of water recommended for being used in productive process like aquaculture due to the low presence of pollutants.

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“…Se determinó también el volumen total adsorbido (cm 3 /g) en base al dato de adsorción correspondiente a la presión relativa más cercana al valor 1. También se calculó el área mesoporosa y el volumen de microporos utilizando el modelo t-plot (Cruz et al, 2018c).…”

Section: Caracterización De La Materia Prima Y Carbón Activadounclassified

Activated carbon based on squash (Cucurbita sp.) peel for removal of total and free chloride in drinking water

Silva

Rimaycuna

Herrera

et al. 2018

manglar

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ResumenLa presente investigación tuvo como objetivo producir carbón activado mediante activación química de un material no convencional, residuos de cáscara de zapallo "hueso" (Cucurbita sp.), con la finalidad de remover el cloro total y residual del agua potable que llega a viviendas de la ciudad de Tumbes. La activación de la biomasa residual se realizó con cloruro de zinc a 600 °C durante un periodo de 2 h en atmosfera de nitrógeno. El carbón activado preparado a partir de cascara de zapallo mostro una buena estructura micro-mesoporosa alcanzando un área superficial de 774,6 m 2 /g, volumen total de poros de 0,50 cm 3 /g y un volumen microporoso de 0,34 cm 3 /g. El adsorbente producido se utilizó para remover satisfactoriamente el cloro total y residual de agua potable que llega a cinco zonas de la ciudad de Tumbes. Los datos de cinética de adsorción de cloro residual y total por parte del carbón activado producido se ajustan mejor al modelo de pseudosegundo orden con valores máximos de capacidad de adsorción en el equilibrio (qe) de cloro residual y total de hasta 3,6 y 3,1 mg/g respectivamente. Adicionalmente el hecho de que los datos de cinética de adsorción se ajusten al modelo de difusión intraparticular supone que este es el mecanismo que limita el proceso de adsorción. Los porcentajes de remoción de cloro total y residual del agua potable llegan a valores de hasta 100%. El carbón activado producido de cáscara de zapallo es un adsorbente promisorio para su uso en el tratamiento de agua. AbstractThis research aimed to produce activated carbon by chemical activation of an unconventional material, squash (Cucurbita sp.) peel residues, with the purpose of removing total and free chlorine from drinking water in Tumbes city. Activation of the residual biomass was carried out with zinc chloride at 600 °C for of 2 h in inert conditions (nitrogen flux). Prepared activated carbon depicted a good micro-mesoporous structure reaching a surface area of 774.6 m 2 /g, total pore volume of 0.50 cm 3 /g and a microporous volume of 0.34 cm 3 /g. The produced adsorbent was used to satisfactorily remove of total and free chlorine of drinking water in Tumbes city. The free and total chlorine adsorption kinetics data from the produced activated carbon are adjusted the best to the pseudo-second order model with maximum values of equilibrium adsorption capacity (qe) of free and total chlorine of up to 3.6 and 3.1 mg/g respectively. Additionally, the fact that the adsorption kinetic data are adjusted to the intraparticular diffusion model assumes that this is the mechanism that limits the adsorption process. The percentages of removal of total and residual chlorine from drinking water reach values of up to 100%. Produced activated carbon from squash peel is a promising adsorbent for using in water treatment.

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Microporous Activation Carbon Made of Sawdust From Two Forestry Species for Adsorption of Methylene Blue and Heavy Metals in Aqueous System – Case of Real Polluted Water

Abstract: Modelado de la biodegradación en biorreactores de lodos de hidrocarburos totales del petróleo intemperizados en suelos y sedimentos (Biodegradation modeling of sludge bioreactors of total petroleum hydrocarbons weathering in soil and sediments)

Cited by 7 publications

References 25 publications

Evaluation and selection of biochars and hydrochars derived from agricultural wastes for the use as adsorbent and energy storage materials

Evaluation and selection of biochars and hydrochars derived from agricultural wastes for the use as adsorbent and energy storage materials

First study of water quality in the San Camilo and Mojahuevo estuaries located in Guayas for being used in aquaculture

Activated carbon based on squash (Cucurbita sp.) peel for removal of total and free chloride in drinking water

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