Removal of residual phenols from coke wastewater by adsorption

Vázquez, Isaac Amigo; Rodríguez-Iglesias, Jesús; Marañón, E.; Castrillón, L.; Álvarez, Mauro

doi:10.1016/j.jhazmat.2007.01.019

Cited by 156 publications

(73 citation statements)

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“…The closer fitting of Freundlich isotherm model with the experiment batch adsorption results also indicates multiple binding and heterogeneity for Cr 6+ adsorption in soil media [13]. When 1/n value is in the range of 0.1<1/n<1, the adsorption process is favourable [14]. In the present investigation the high value of 1/n clearly indicate that the retardation factor is relatively high and the soil has relatively high Cr 6+ attenuation capacity.…”

Section: Batch Equilibrium Studysupporting

confidence: 68%

“…1 -Fig. 3 respectively, and Freundlich isotherm model (coefficient of determination, r 2 =0.9837, RMSE=0.89) provided the best fit to the test results (Table III) When 1/n value is in the range of 0.1<1/n<1, the adsorption process is favourable [14]. In the present investigation the high value of 1/n clearly indicate that the retardation factor is relatively high and the soil has relatively high Cr 6+ attenuation capacity.…”

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confidence: 91%

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Assessment of Pollution Potential of Soil and Groundwater in a Non-Engineered MSW Landfill Site

Adhikari¹,

Pal²

2016

IJESD

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Abstract-Assessment of pollution potential of soil and groundwater by MSW landfill leachate in an industrial city of the eastern India has been carried out through physico-chemical characterization of soil and groundwater, identification of priority contaminants, batch adsorption and isotherm studies of priority contaminants. The study region used to receive wastes for 8-10 years in an area of 1000m × 500m before it was abandoned 3 years ago. Cr 6+ has been taken as priority contaminant in the leachate because of its presence in the MSW dump site soil as seven times higher (10.16 mg/Kg) than the CCME standard. Index Terms-Adsorption, chromium, groundwater, in-situ soil, isotherm, MSW dumpsite. I. INTRODUCTIONThe most common and convincing method to manage the municipal solid waste is the burial in an engineered landfill. In India, most of the urban areas dump their solid waste in open fields either little away from the locality or in the vicinity of the locality. The open waste dumps, apart from odors, rodent and aesthetic nuisance are prone to generate leachate in different stages of interaction under various physico-chemical condition in the subsurface. Once the refuse is very well decomposed, the rate of oxygen diffusion into the landfill may exceed the rate of microbial oxygen depletion characteristics and mineralogical components of soil or rock in the unsaturated and saturated zone are equally important in assessing soil and groundwater pollution.The objective of the study was to assess the pollution potential of soil and groundwater in a MSW waste dump site and its proximities through physico-chemical characterization of soil and groundwater, identification of priority contaminants, batch adsorption and isotherm studies of priority contaminants.A MSW open dump located in the Durgapur city, West Bengal, India was operative for 8-10 years before it was abandoned three years ago. The approximate area covered by the waste dump is 1000m  500m. There are villages in the proximity of eastern boundary of the waste dump site. As the MSW dump site is entirely unprotected in terms of leachate generation and migration of leachate in the sub-surface, there are possibilities of formation of contaminant plume in the groundwater beneath the dump. The rural people, living in the proximity of this MSW dump site, may become the victim by consuming this contaminant laden groundwater. II. MATERIALS AND METHODS A. Sampling of SoilThe entire landfill area was subdivided into five equal grids (A, B, C, D, E) from which 11 nos. of soil samples were collected by augur boring to predetermined depth. The soil samples were taken to laboratory for physico-chemical analysis. B. Sampling of Groundwater14 number of groundwater samples were collected from dug wells in the close proximity of MSW dumpsite. Out of 14 samples only one sample was collected from the only unlined dug well (L-12) present within landfill. The water samples then analyzed for the parameters like pH, TDS, Cr, Pb, Fe and Zn, respectively by using standard methods as ...

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Section: Batch Equilibrium Studysupporting

confidence: 68%

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confidence: 91%

Assessment of Pollution Potential of Soil and Groundwater in a Non-Engineered MSW Landfill Site

Adhikari¹,

Pal²

2016

IJESD

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“…Results from the utilization of biosorbents show high treatability for contaminants, such as heavy metals, coliform count and phenol. Isotherm and pseudo-kinetic descriptive models were employed in most adsorption studies to further assess biosorbents (V´azquez et al, 2007;Tu et al, 2012;Sangodoyin & Ajayi-Banji, 2014). Other contaminants worthy of note are phosphate, nitrate and sulphate ions.…”

Section: Introductionmentioning

confidence: 99%

Biosorbability of Coconut Husk Char in Polyatomic Ions Sequestration from Contaminated Surface Water

Ajayi-Banji¹,

Ajimo²,

Igbode³

2016

IJTech

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Agricultural waste has increased colossally with development in agricultural production causing environmental nuisance and degradation. Utilization of coconut husks, one of such type of waste, as a biosorbent for polluted surface water treatment, was considered in this study. Polluted surface water was gently passed through two similar columns loaded with 100 and 200 g of coconut husk char respectively. The treated water samples collected after 30, 60, 90, 120 and 150 mins were examined for SO 4 2-, NO 3 -and PO 4 3-ions concentration. Removal efficiency for SO 4 2-, NO 3 -and PO 4 3-ions on 100 g coconut husk char after 150 mins detention time were 70, 78 and 91% respectively. Freundlich isotherm model gave a better description of the data (R 2 > 0.96). Sorption data was well described by second order pseudo kinetics (R 2 > 0.85). An amount of 100 g of the biosorbent has a strong affinity for these types of ion removal in contaminated water. Coconut husk char as a biosorbent is a panacea to significant concentrations of polyatomic ions in polluted surface water.

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“…The constant n is the empirical parameter related to the intensity of adsorption which varies with the heterogeneity of the material. When 1/n values are in the range 0.1<1/n<1, the adsorption process is favorable [34]. The plot of the experimental C e /q e against Ce and ln q e against ln C e gives the slope of 1/q max , intercept 1/K L q max and the values of 1/n, lnK F are calculated from the slope and intercept of the plot of ln q e against ln C e , for the experimental data in Figures 7a and 7b.…”

Section: Adsorption Isotherms Studiesmentioning

confidence: 99%

Adsorption Characteristics of Copper (II) Ions from Aqueous Solution onto Ionic Cross-linked Pva/P(Aam-Nipaam) Core-shell Nanogels

Sarhan¹

2015

J Nanomed Nanotechnol

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Core-shell nanogels adsorbent were investigated for copper (II) removal from aqueous solution, consisting of poly(vinyl alcohol) (PVA) core and poly(acrylamide-N-isopropylacrylamide/) p(AAm-NIPAm) shell particles. Various factors affecting the adsorption capacity, such as swelling, pH, time, initial ion concentration, and different metal ions on the metal ion binding capacity for nanogel, was also tested. The selectivity of the nanogels toward the different metal ions tested was Cu 2+ > N i2+ > Pb 2+ . The results show that the adsorption of nanogels mainly depends on pH, and the maximum adsorption was obtained at a pH of 6.0. The adsorption capacity of Cu +2 was 126 mg/g obtained under simple and fast experimental conditions, the effect of different mole ratios of p(AAm-NIPAm) shells thickness were synthesized, to determine the maximum metal uptake. The core-shell nanogels were characterized by fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and transmission electron microscope (TEM). It was found that adsorbed Cu +2 ions on PVA/p(AAm-NIPAm) nanogels can be effectively desorbed by acid stripping with 0.1 mol/L HCl resulted in 96% Cu +2 recovery for the nanogels; this shows the ability of the nanogels to be reused, upon drying between treatments. The nanogels adsorbent can be regenerated after releasing of Cu +2 and reused three times effectively. All the experimental result exhibited good matches with the Freundlich isotherm and followed pseudo-second-order kinetics. The mechanism of adsorption of Cu +2 onto PVA/p(AAm-NIPAm) nanogels is proposed.

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Removal of residual phenols from coke wastewater by adsorption

Cited by 156 publications

References 10 publications

Assessment of Pollution Potential of Soil and Groundwater in a Non-Engineered MSW Landfill Site

Assessment of Pollution Potential of Soil and Groundwater in a Non-Engineered MSW Landfill Site

Biosorbability of Coconut Husk Char in Polyatomic Ions Sequestration from Contaminated Surface Water

Adsorption Characteristics of Copper (II) Ions from Aqueous Solution onto Ionic Cross-linked Pva/P(Aam-Nipaam) Core-shell Nanogels

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