Adsorption capacity of iron oxide-coated gravel for landfill leachate: simultaneous study

Sızırıcı, Banu; Yildiz, İbrahim

doi:10.1007/s13762-016-1207-9

Cited by 20 publications

(26 citation statements)

References 34 publications

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“…The experimental and theoretical values of q e are not in agreement with each other. Also, the smaller value of K 2 than K 2 q e 2 (initial rate constant) indicates the fast CO adsorption process during the initial period of time, and then, it was getting slower with time [47,53]. The value of regression coefficient (R 2 ) for this model is close to unity that it is applicable to explain CO adsorption by Al 2 O 3 /Pd(NO 3 ) 2 /zeolite adsorbent [46,54].…”

Section: Pseudo-second -Order Kineticmentioning

confidence: 71%

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Investigation of carbon monoxide gas adsorption on the Al2O3/Pd(NO3)2/zeolite composite film

et al. 2019

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In this study, Al 2 O 3 /Pd(NO 3) 2 /zeolite composite films have been fabricated by roll coating method and characterized by X-ray diffraction, energy-dispersive X-ray spectroscopy and field emission scanning electron microscopy. The gas adsorption was tested in an experimental setup by a continuous gas analyzer KIMO KIGAZ 210 at constant temperature and pressure (32 °C and 1.5 bar) and as a function of reaction time (s). The inlet CO gas concentration was 150 mg L −1 , and the saturation level of CO gas concentration was 5 mg L −1. The maximum adsorption capacity (q max) and maximum adsorption efficiency (%) were calculated as 111.16 mg g −1 and 97%, respectively. Pseudo-first-order, pseudo-second-order, and intra-particle diffusion models were investigated to kinetic study of CO adsorption on Al 2 O 3 /Pd(NO 3) 2 /zeolite adsorbents. Results indicated that CO adsorption follows the pseudo-second-order model well according to regression coefficient value (R 2 = 0.98), and the value of pseudo-second-order rate constant of adsorption was obtained as 2 × 10 −5 g mg −1 s −1. According to the intra-particle diffusion model, adsorption is affected by only one process. So, adsorption of CO by Al 2 O 3 /Pd(NO 3) 2 /zeolite adsorbent indicated an effective adsorption by obtained results.

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Section: Pseudo-second -Order Kineticmentioning

confidence: 71%

“…Pseudo-first-order model is applicable to study adsorption process during the initial stage [46][47][48]. The pseudo-firstorder model (Lagergen, 1898) [49] is defined as Eq.…”

Section: Pseudo-first-order Kineticmentioning

confidence: 99%

Investigation of carbon monoxide gas adsorption on the Al2O3/Pd(NO3)2/zeolite composite film

et al. 2019

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“…It was characterized with a variety of analytical and spectroscopic techniques including scanning electron microscope (SEM), energy-dispersive X-ray (EDX), X-Ray diffraction (XRD), and Brunauer-Emmett-Teller (BET) surface area analysis. The results of the characterization were published elsewhere [24,25]. The immobilization of the activated sludge on gravel was verified with SEM using JSM-7610F.…”

Section: Filter Media Preparationmentioning

confidence: 99%

“…An established protocol was adopted to prepare the synthetic wastewater samples [24][25][26][27]. All the measurements were run at pH 7 adjusted by using NaOH or HCl solutions.…”

Section: Synthetic Wastewater Preparationmentioning

confidence: 99%

Organic matter removal via activated sludge immobilized gravel in fixed bed reactor

Sızırıcı

Yildiz

2020

E3S Web Conf.

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In this study, the adsorption capability of the activated sludge immobilized gravel as a low-cost and efficient adsorbent to remove organic matter in terms of chemical oxygen demand (COD) from synthetic wastewater was investigated using fixed bed columns. The effects of parameters including column pack height and influent COD concentrations on removal efficiencies were assessed through breakthrough curves. It was found that the removal efficiency increased when fixed bed height was increased and influent COD concentration was decreased. The maximum COD removal rate of 36.35%, was obtained for a medium-strength wastewater sample with 1166 mg/L of COD concentration when the bed height was 2 cm, and the flow rate was 11 mL/min. Activated sludge immobilized gravel can be utilized as a low cost bio-filter to remove organic material from wastewater.

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“…High metal concentrations in landfill leachates stem from increasing amounts of electronic wastes, batteries, paints and treated woods in mainstream solid wastes [1,2]. It was reported that improper management of leachate can pollute environment to a significant extent [3][4][5]. For that reason, reduction of these metals with effective treatment methods bears critical importance.…”

Section: Introductionmentioning

confidence: 99%

Iron Oxide-Coated Gravel Fixed Bed Column Study Performance to Remove Mixed Metals from Landfill Leachate

Yildiz

Sızırıcı

2019

E3S Web Conf.

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Iron oxide-coated gravel as an adsorbent was employed in continuous fixed bed column study to remove Fe(II), Ni(II), and Zn(II) simultaneously in synthetic leachate samples. Experimental and modeled adsorption capacities derived from the breakthrough curves showed the adsorption capacity order of Zn(II)>Fe(II)> Ni(II). Iron oxide-coated gravel column removed 58.24% of Zn(II), 47.71% of Fe(II), and 39.45% of Ni(II). Desorption process was studied in order to test the regeneration capability of iron oxidecoated gravel. It was seen that 99.64 % of Ni(II), 99.54% of Fe(II) and 6.75% of Zn (II) were recovered through the first cycle of adsorption/desorption. In the second cycle, the recovery rates dropped to 81.4% for Ni(II), 80% for Fe(II) and 4% for Zn(II). Based on these results, iron oxide coated gravel has potential to remove mixed metal ions simultaneously in aqueous solutions.

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Adsorption capacity of iron oxide-coated gravel for landfill leachate: simultaneous study

Cited by 20 publications

References 34 publications

Investigation of carbon monoxide gas adsorption on the Al2O3/Pd(NO3)2/zeolite composite film

Investigation of carbon monoxide gas adsorption on the Al2O3/Pd(NO3)2/zeolite composite film

Organic matter removal via activated sludge immobilized gravel in fixed bed reactor

Iron Oxide-Coated Gravel Fixed Bed Column Study Performance to Remove Mixed Metals from Landfill Leachate

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