Removal of inert COD and trace metals from stabilized landfill leachate by granular activated carbon (GAC) adsorption

Mohammad-pajooh, Ehsan; Turcios, Ariel E.; Cuff, Graham; Weichgrebe, Dirk; Rosenwinkel, Karl‐Heinz; Vedenyapina, M. D.; Шарифуллина, Л. Р.

doi:10.1016/j.jenvman.2018.09.020

Cited by 58 publications

(14 citation statements)

References 14 publications

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“…Using PAC with RL removes up to 89.29% COD (with the highest dose), and large color removals are achieved, greater than 94% from the 4-g dose, suggesting that PAC is best for removing contaminants from raw leachate. In general, activated carbon both granular and powder is used to treat leachates; however, the granular is mostly applied with better efficiencies without previous treatments [ 37 ].…”

Section: Resultsmentioning

confidence: 99%

Selection of the Activated Carbon Type for the Treatment of Landfill Leachate by Fenton-Adsorption Process

et al. 2020

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Sanitary landfill leachates usually have characteristics that depend on the region where they are generated and according to the age of the landfill, which is why a unique treatment for their sanitation has not been found. However, the adsorption preceded by the Fenton process has been proven to be highly efficient at removing contaminants. In this study, the adsorptive capacity of two types of activated carbon, granular and powdered, was analyzed to determine which was more efficient in the adsorption stage in the Fenton-adsorption process. Likewise, its behavior was analyzed using three isotherm models (Langmuir, Freundlich and Temkin), testing the raw leachate and the Fenton-treated one with both carbons. The adsorption that is carried out on the carbons is better adjusted to the Freundlich and Temkin models. It concludes that multilayers, through the physical adsorption, carry out the adsorption of pollutants on the surface of the carbons. The results show that, statistically, granular activated carbon is more efficient at removing chemical oxygen demand (COD), and powdered activated carbon removes color better. Finally, an adsorption column was designed for the Fenton-adsorption process that was able to remove 21.68 kgCOD/kg carbon. Removal efficiencies for color and COD were >99%.

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Section: Resultsmentioning

confidence: 99%

Selection of the Activated Carbon Type for the Treatment of Landfill Leachate by Fenton-Adsorption Process

et al. 2020

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“…Likewise, Novak et al . (2003) indicated that one of the factors promoting pesticide retention was porosity of the absorbent material; others have reported that GAC had a high porosity and superficial area to retain different compounds (Hernández et al ., 2003; Mohammad‐pajooh et al ., 2018). Thus, GAC can influence the retention of endosulfan, increasing the removal efficiency measured in the effluent.…”

Section: Resultsmentioning

confidence: 99%

Removal of endosulfan in a sequencing batch reactor: addition of granular activated carbon as improvement strategy

Varela¹,

Contreras²,

Santos-Villalobos³

et al. 2020

Water & Environment J

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A granular activated carbon‐sequencing batch reactor (GAC‐SBR) was used to assess the removal of organochlorine endosulfan pesticide. The reactor operated in three stages: (I) starter and stabilization; (II) addition of 4 mg/L of endosulfan in feed; and (III) a single addition of 1 g/L of GAC to mixed liquor. During the 249 days of operation, the removal efficiency of COD was 96 ± 2%; for NH4+‐N 72 ± 1%; and for PO4−3‐P 48 ± 13%. Was eliminated the 79% of endosulfan in stage II and 99% in stage III, not found its metabolite (endosulfan sulphate) in the reactor effluent. A consortium of eight bacterial strains was identified in the reactor stages, assessing five of them in the presence of 4 mg endosulfan/L by growth kinetics. According to the results, the joint action of the consortium and GAC addition is the responsible of eliminating the pesticide.

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“…In a pilot study, the column capacity was even 150 mg DOC/g (≈ 450 mg COD/g) for an influent concentration of 640 mg COD/L [29]. After more than 25 years, the process is still used because even landfills that approach stabilization continue to produce leachate [30]. These examples show that granular activated carbon is successfully applied in practice for the removal of refractory organics.…”

Section: Adsorption On Activated Carbonmentioning

confidence: 99%

Options for Removing Refractory Organic Substances in Pre-Treated Process Water from Hydrothermal Carbonization

Fettig

Austermann-Haun

Meier³

et al. 2019

Water

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Granular activated carbon (GAC) adsorption, as well as ozonation in combination with biodegradation was investigated in order to remove refractory organics from biologically pre-treated process waters (PW) produced by the hydrothermal carbonization (HTC) of spent grains and fine mulch. Kinetic tests revealed that the organics in spent grains PW had much lower molecular weights than organics in fine mulch PW. Moreover, isotherms showed that they were more strongly adsorbable. This was confirmed in GAC column experiments, where the breakthrough curves could be predicted fairly well by a dynamic adsorption model. On the other hand, ozonation had a stronger effect on fine mulch PW with respect to an enhancement of the aerobic degradability. Thus, the type of input material determines the properties of soluble reaction products from the carbonization process that must be accounted for when selecting the most suitable post-treatment method for HTC PW. However, adsorption on granular activated carbon should always be the final stage.

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Removal of inert COD and trace metals from stabilized landfill leachate by granular activated carbon (GAC) adsorption

Cited by 58 publications

References 14 publications

Selection of the Activated Carbon Type for the Treatment of Landfill Leachate by Fenton-Adsorption Process

Selection of the Activated Carbon Type for the Treatment of Landfill Leachate by Fenton-Adsorption Process

Removal of endosulfan in a sequencing batch reactor: addition of granular activated carbon as improvement strategy

Options for Removing Refractory Organic Substances in Pre-Treated Process Water from Hydrothermal Carbonization

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