Adsorption of landfill leachates onto activated carbonEquilibrium and kinetics

Rivas, Javier; Beltrán, Fernando J.; Gimeno, Olga; Frades, J.; Carvalho, Fátima

doi:10.1016/j.jhazmat.2005.09.022

Cited by 56 publications

(23 citation statements)

References 16 publications

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“…In the present study, UV 254 was 2.75 ± 0.21 cm −1 in the raw leachate. According to Rivas et al (2006), UV 254 was 40 cm −1 in leachate from an Italian landfill; this is almost 15 times higher than in this study. However, other authors have found low values of UV 254 that are similar to that in the present study.…”

Section: Characteristics Of Landfill Leachatecontrasting

confidence: 56%

Treatment of stabilized landfill leachate in an integrated adsorption–fine-ultrafiltration system

Kulikowska

Zielińska

Konopka

2018

Int. J. Environ. Sci. Technol.

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This study investigated the feasibility of using an adsorption-fine-ultrafiltration system for removing organics from stabilized landfill leachate. For adsorption, Norit SX2 powdered activated carbon was used; the fine-ultrafiltration system was equipped with a ceramic membrane. Due to low organics removal efficiency in fine-ultrafiltration alone (series 1) (46.5% of chemical oxygen demand, 22.1% of dissolved organic carbon), two doses of activated carbon were used for adsorption before fine-ultrafiltration: 0.2 g/L (series 2) and 1 g/L (series 3). Although organics removal efficiency at both doses of Norit SX2 differed (12.9 and 34.5% of chemical oxygen demand, 12.2 and 54.7% of dissolved organic carbon, at 0.2 and 1 g/L, respectively), permeate quality did not differ substantially. Although the use of Norit SX2 improved permeate quality in comparison with fine-ultrafiltration alone (220 mg/L in series 2 and 209 mg/L in series 3 vs. 842 mg/L in series 1), its particles blocked the membrane and lowered the permeate flux even at the lower dose. In the series with adsorption, permeate flux was about 10 times lower than during fine-ultrafiltration alone. This indicates that, in fine-ultrafiltration preceded by adsorption on activated carbon, it is reasonable to use the lower dose of Norit SX2 because the efficiency of treatment is similar to that at the higher dose, but the reduction in permeate flux is somewhat less. These results indicate that the possibility of using adsorption-fine-ultrafiltration in the practice of leachate treatment is limited because of blocking membrane pores with particles of activated carbon.

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Section: Characteristics Of Landfill Leachatecontrasting

confidence: 56%

Treatment of stabilized landfill leachate in an integrated adsorption–fine-ultrafiltration system

Kulikowska

Zielińska

Konopka

2018

Int. J. Environ. Sci. Technol.

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“…It has been used by several researchers to determine the best fitting isotherm model [88][89][90][91]. Calculation procedure is as follows: it is used to analyze the fitting degrees of isotherms and kinetic models with experimental data [12,92].…”

Section: Sum Of Normalized Errors (Sne)mentioning

confidence: 99%

“…This function is very important in the determination of the best fit of an adsorption system. It can be obtained by judging the sum square difference between experimental and calculated data, with each square difference divided by its corresponding values [90]. The value of this function can be obtained from the following equation:…”

Section: Nonlinear Chi-square Test (mentioning

confidence: 99%

Modelling and Interpretation of Adsorption Isotherms

Ayawei

Ebelegi

Wankasi

2017

Journal of Chemistry

2,048

885

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The need to design low-cost adsorbents for the detoxification of industrial effluents has been a growing concern for most environmental researchers. So modelling of experimental data from adsorption processes is a very important means of predicting the mechanisms of various adsorption systems. Therefore, this paper presents an overall review of the applications of adsorption isotherms, the use of linear regression analysis, nonlinear regression analysis, and error functions for optimum adsorption data analysis.

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“…Therefore, other technologies have been proposed for their handling and management [2,3]. The most relevant physicochemical processes for the treatment of landfill leachates are the floatation [4], coagulation-flocculation [5], adsorption [6], wet air oxidation [7], membrane processes [8,9], chemical oxidation using O 3 [10] and H 2 O 2 [11], and the advanced oxidation processes (AOPs) that are based on the generation of hydroxyl radicals (i.e., Fenton's reagent, TiO 2 photocatalysis, O 3 /H 2 O 2 , etc.) [12,13].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical process for the treatment of landfill leachate

2010

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In this paper, the anodic oxidation of a real leachate from an old municipal solid waste landfill has been studied using an electrolytic flow cell equipped with a lead dioxide (PbO 2 ) anode and stainless steel as the cathode. The influence of several operation parameters such as (i) the applied current (from 0.5 to 3 A), (ii) liquid flow rate (from 50 to 420 L h -1 ), (iii) temperature (from 25 to 50°C), and (iv) pH (from 3.5 to 8.2) on the COD removal rate, current efficiency, and energy consumption has been evaluated. The galvanostatic electrolyses always yielded COD values below the discharge limit (COD \160 mg L -1 ); the COD removal rate increased with rising applied current, solution pH, and temperature, whereas it remained almost unaffected by the recirculation flow rate. These results indicate that the organic compounds were mainly removed by their indirect oxidation by the active chlorine generated from chlorides oxidation. The specific energy consumption necessary to reduce the organic load to below the disposal limit was 90 kWh m -3 .

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Adsorption of landfill leachates onto activated carbonEquilibrium and kinetics

Cited by 56 publications

References 16 publications

Treatment of stabilized landfill leachate in an integrated adsorption–fine-ultrafiltration system

Treatment of stabilized landfill leachate in an integrated adsorption–fine-ultrafiltration system

Modelling and Interpretation of Adsorption Isotherms

Electrochemical process for the treatment of landfill leachate

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