Mechanism of adsorption of humic acid by modified aged refuse

Zhang, Aiping; Chen, Wei-Ming; Gu, Zhepei; Li, Qibin; Shi, Guozhong

doi:10.1039/c8ra05933k

Cited by 13 publications

(3 citation statements)

References 42 publications

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“…In the case of incrementing the dosage of the adsorbent, it automatically enhanced the count of active sites present for the purpose of adsorption. So, this phenomenon, i.e., enhancing the ion/proton exchange between the functional groups and the active sites, is a valuable technique to enhance the overall adsorption rate (Aiping [25]). 5 Adsorption Science & Technology the functional groups present in an adsorbent only decide the pH value.…”

Section: Adsorption Of Chromium (Vi) Ionsmentioning

confidence: 99%

Enhanced Adsorptive Removal of Chromium (VI) from Aqueous Solution on Using Aged Refuse: Resource Recovery and Environmental Applications

Manimekalai

Sivanesan

Kumar

2023

Adsorption Science & Technology

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“Aged refuse” corresponds to municipal solid waste material dumped in land, for several years. This solid waste material is chosen as an adsorbent for the current study since it is available abundantly in the state of Tamil Nadu, India, and has not been used for any other applications. The current study was conducted to get rid of the element chromium (VI) from wastewater by using the adsorption process. The aged refuse was analytically tested through various processes such as BET, TGA, XRD, SEM, and FTIR to determine the surface morphology, functional groups, thermal stability, nature of the crystalline, and surface area. The researchers conducted the batch adsorption study to validate the influence exerted by different sorts of adsorption parameters like contact time (10-100 min), initial concentration of the pollutant (50 mg·L-1 to 250 mg·L-1), pH (1-7), and the dosage of the adsorbent (0.5 g·L-1-3.0 g·L-1). In the current study, the researchers achieved the maximum adsorption capacity of 195.54 mg·g-1. From the kinetic results, it can be understood that the pseudo-first-order model was the most suitable kinetic model. Further, the study outcomes confirm that the Langmuir isotherm model is the best fit by isotherm studies which indicate the monolayer adsorption process. This study indicated that the aged refuse can be potentially used in removing Cr (VI) from water environment under standard optimized conditions.

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Section: Adsorption Of Chromium (Vi) Ionsmentioning

confidence: 99%

Enhanced Adsorptive Removal of Chromium (VI) from Aqueous Solution on Using Aged Refuse: Resource Recovery and Environmental Applications

Manimekalai

Sivanesan

Kumar

2023

Adsorption Science & Technology

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“…XRD diffraction of MHA shows diffraction peaks at 2θ=21.53º, 35.95º, and 57.93º. The diffraction peaks that appear at 2θ=21.53º (002) indicate the presence of high amounts of carbon contained in humic acid (Zhang et al, 2018). The diffraction peaks at 2θ=35.75º (311) and 57.93º (511) are originally peaks from Magnetite (Santosa et al, 2021b).…”

Section: Characteristics Of Ha and Mhamentioning

confidence: 99%

Selectivity of Malachite Green on Cationic Dye Mixtures Toward Adsorption on Magnetite Humic Acid

Ahmad¹,

Arsyad²,

Royani³

et al. 2022

Environ. Nat. Resour. J.

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Magnetite humic acid (MHA) was successfully synthesized by the coprecipitation method followed by hydrothermal process, as evidenced by the XRD, FTIR, VSM, and SEM analysis characterization results. XRD diffraction shows diffraction peaks at 2θ=21.53º, 35.95º, and 57.93º. The FTIR spectra have a typical absorption at 3,410, 1,589, 1,396, 1,026, 910, 794, and 540 cm-1. Magnetite humic acid was paramagnetic with magnetization (Ms) 17.04 emu/g. Humic acid and magnetite humic acid have an irregular structure; the morphology of magnetite humic acid is smoother than humic acid. Malachite green was more selective than methylene blue and rhodamine B on magnetite humic acid. The adsorption of malachite green on humic acid and magnetite humic acid was carried out at pHpzc 8.06 and 6.08. The adsorption capacity (Qmax) of humic acid (77.519 mg/g) and magnetite humic acid (169.492 mg/g) were found with pseudo-second-order kinetic and Langmuir isotherm models. After five regeneration cycles, the adsorption percentages of malachite green with humic acid and magnetite humic acid ranged from 94.67-61.37% and 62.03-21.11%, respectively. Magnetite humic acid has high stability and reusability. The good regeneration of MHA was supported by the XRD diffractogram. Magnetic properties in the material simplify the adsorption process and minimize the potential for damage to the surface of the material.

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“…2 HA causes unfavorable color changes in water, including yellow, brown, and black. 3 Additionally, many organic functional groups of HA can connect with diverse organic and inorganic matter; thus, HA is difficult to remove from the environment. 4 For example, the chelation of humic acid with heavy metal ions such as Cu 2+ , Hg 2+ , and Pb 2+ will result in enhanced toxicity.…”

Section: Introductionmentioning

confidence: 99%

Elimination of humic acid in water: comparison of UV/PDS and UV/PMS

Tang

Yuan

et al. 2020

RSC Adv.

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Mechanism of adsorption of humic acid by modified aged refuse

Abstract: In the present study, aged refuse (AR) was modified to be applied as an adsorbent to remove humic acid from water.

Cited by 13 publications

References 42 publications

Enhanced Adsorptive Removal of Chromium (VI) from Aqueous Solution on Using Aged Refuse: Resource Recovery and Environmental Applications

Enhanced Adsorptive Removal of Chromium (VI) from Aqueous Solution on Using Aged Refuse: Resource Recovery and Environmental Applications

Selectivity of Malachite Green on Cationic Dye Mixtures Toward Adsorption on Magnetite Humic Acid

Elimination of humic acid in water: comparison of UV/PDS and UV/PMS

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