Aqueous nitrate ion adsorption/desorption by olive solid waste-based carbon activated using ZnCl2

Nassar, Heba; Zyoud, Ahed; El‐Hamouz, Amer; Tanbour, Rafeeq; Halayqa, Nour; Hilal, Hikmat S.

doi:10.1016/j.scp.2020.100335

Cited by 29 publications

(17 citation statements)

References 67 publications

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“…Ion exchange needs high energy or a high or expensive dose of the reagent (Zeng et al 2020). In recent decades, the adsorption methods have received great attention in removal of nitrate or nitrite from water, due to its simplicity, sludge free operation, easiness in handing and availability of various adsorbents (Song et al 2016;Nassar et al 2020). So far, the clay materials such as hydrotalcites with advantages of low cost, abundant source and easy preparation, have gained great concern from researchers.…”

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confidence: 99%

Adsorption of nitrate and nitrite from aqueous solution by magnetic Mg/Fe hydrotalcite

Chen

Wei

et al. 2021

Water Supply

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In this study, magnetic Mg/Fe hydrotalcite calcined material (M-CHT) was synthesized through co-precipitation and calcination method, and was used to effectively remove nitrate and nitrite from water. M-CHT can restore its original layered structure after the adsorption of nitrate or nitrite, and can be easily separated by the applied magnetic field. The first-order and pseudo-second-order kinetic models (R2 ≥ 0.97) can better describe the adsorption kinetic process. The equilibrium isotherm showed that the Langmuir model provided a better fit to the experimental data than the Freundlich model for nitrates and nitrites. With temperature increased from 298 to 308 K, the maximum adsorption capacity obtained by the Langmuir model increased from 10.60 to 16.90 mg-N/g for nitrate and 7.89 to 14.28 mg-N/g for nitrite, respectively. The adverse effect of coexisting anions ranked in the order of ClO4− > Cl− > SO42− > F− > CO32− > PO43−. The actual Fe2+/Fe3+ value of M-CHT (0.56) is nearly consistent with the theoretical value of 0.5, and the saturation magnetic strength value of M-CHT is 9.15 emu/g, greatly contributing to the solid-liquid separation. Overall, M-CHT with features of magnetic properties and satisfactory adsorption capacity exhibits the greatly promising for application in wastewater purification.

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confidence: 99%

Adsorption of nitrate and nitrite from aqueous solution by magnetic Mg/Fe hydrotalcite

Chen

Wei

et al. 2021

Water Supply

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“…This pattern was more likely caused by: (i) favorable conditions of nitrate removal accentuated by electrostatic attraction as adsorbent surface bears positive charge at lower pH. (ii) the presence of rivalry between nitrate ions and hydroxyl ions in basic solution, as also stated in other works using carbon-based activated carbon content [47,48,51]. In addition to the above-mentioned justifications, it may be further hypothesized that the underperformance of oxidized SBAC is due to the introduction of an acidic surface functional group; in the case of deprotonation, if pH> pHpzc, more binding sites for cationic sorbate are created on the surface than if it was an unoxidized adsorbent [44,52].…”

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confidence: 51%

“…As depicted in Figure 15, the synthesised sorbents with the highest adsorption potential were DC-5-750 M1 (127,6 mg/g) and DC-7-900 M1 (124,4 mg/g), and they were therefore chosen for future experiments, along with the unmodified sorbents (DC-5-surface reaction which are deemed to present less component resistance than external diffusion [46], while stagnant trend after 120 min may be ascribed to occupation of available adsorption site by nitrate ions as the process progress [25,47,48], which weaken the interaction between sorbate and adsorbent surface [48].…”

Section: Fig 14 Preliminary Adsorption Capacity For Nitratementioning

confidence: 99%

“…Due to the high cost of industrial activated carbons, research on activated carbon materials extracted from bio-waste, such as olive stones, lemon grass, wall nutshells and pine cones has taken center stage [5,6,7,8] and among these, activated carbon extracted from sewage sludge (SBAC) has shown promise in the adsorption of inorganic elements such as Ni, Cu, Pb, Cd and Hg [1,9,10,11,12,13].…”

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confidence: 99%

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Bio-Adsorbent Derived from Sewage Sludge Blended with Waste Coal for Nitrate and Methyl Red Removal: Synthesis, Oxidation, Performance and Environmental Consideration

Masengo

Mulopo

2021

Preprint

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Low-cost bio-adsorbents were synthesized using two types of sewage sludge: D, which was obtained during the dissolved air flotation stage, and S, which was a mixture of primary and secondary sludge from the digestion and dewatering stages. The sewage sludge was mixed with waste coal before being activated with Potassium Hydroxide (KOH) and oxidized with ammonium persulfate (APS). The nitrate and methyl red removal capacities of the synthesized bio-adsorbents were evaluated and compared to those of industrial activated charcoal. The oxidation surface area of bio-adsorbents derived from sludge S shrank by six fold after modification, while those derived from D only varied narrowly from 312,72 m2/g to 282,22 m2/g, but surface modification had no effect on inorganic composition in either case. The adsorption of nitrate and methyl red (MR) was performed in batch mode, and the removal processes followed the pseudo second order kinetic model and the Langmuir isotherm fairly well. The adsorption capacities of nitrate and MR were higher at pH=2 and pH=4, respectively. The total nitrate Langmuir adsorption potential was DC-5-750 (26,735 mg/g) > commercial activated carbon (Com-AC) (20,61 mg/g) > DC-55-750M1 (17,06 mg/g), and for MR, Com-AC (196,07 mg/g) > DC-5-750M2 (175 mg/g).Statement of Novelty: This paper examines how the chemical structure of activated carbon derived from sewage sludge and blended with waste coal is altered during the chemical activation process to provide the optimal porous surface for nitrate and methyl red adsorptive remediation. The formation of carboxylic sites or the transformation of oxygen sites to carboxylic sites is the aim of the oxidation process of activated carbon in general. Ammonium peroxydisulfate was chosen because of its ability to oxidize the surface without significantly altering the porous structure and increase surface acidity by increasing carboxylic group presence. There are no studies that we are aware of that use ammonium peroxydisulfate to oxidize activated carbon from sewage sludge blended with waste coal

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“…Langkah aktivasi secara kimia yakni bahan baku berupa arang terlebih dahulu diperkecil ukurannya, kemudian arang direndam dalam bahan kimia. Larutan untuk aktivasi biasanya berupa asam contohnya adalah asam klorida (HCl) [13], asam sulfat (H2SO4) [14], atau basa seperti natrium hidroksida (NaOH) [15], dan dari garam seperti natrium khlorida (NaCl) [16], seng khlorida (ZnCl2) [17]. Arang direndam dalam larutan aktivator selama kurang lebih 24 jam [18,19].…”

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Activation of Coconut Shell Charcoal and Application for Bleaching Used Cooking Oil

Jamilatun

Setyawan

Janah

et al. 2021

CHEMICA: Jurnal Teknik Kimia

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Tanaman kelapa (Cocus nucifera. L) merupakan tanaman tropis yang tumbuh subur di Indonesia dan sangat dikenal oleh masyarakat dengan banyak manfaat. Pemanfaatan tanaman kelapa umumnya lebih diutamakan pada daging buahnya saja untuk diolah menjadi santan [1-2]. Bagian lain dari tanaman kelapa seperti tempurung kelapa pemanfaatannya belum maksimal dan mempunyai nilai ekonomi yang rendah. Nilai tambah dan daya guna tempurung kelapa dapat dijadikan sebagai bahan baku pembuatan arang aktif [3][4][5][6][7][8]. Secara langsung arang dari tempurung kelapa dapat digunakan sebagai bahan bakar berwujud padatan tanpa proses ekstraksi yang rumit, seperti yang dipersyaratkan biofuel berbasis liquid. Keuntungan yang lain dari arang adalah memiliki kandungan bahan yang dapat digunakan sebagai pupuk serta untuk mempertahankan sumber daya air di perkebunan. Sebagai bahan perantara, arang dapat digunakan sebagai bahan baku untuk sintesis nanopartikel [9-10], karbon aktif, karbon hitam, serat karbon [8].

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Aqueous nitrate ion adsorption/desorption by olive solid waste-based carbon activated using ZnCl2

Cited by 29 publications

References 67 publications

Adsorption of nitrate and nitrite from aqueous solution by magnetic Mg/Fe hydrotalcite

Adsorption of nitrate and nitrite from aqueous solution by magnetic Mg/Fe hydrotalcite

Bio-Adsorbent Derived from Sewage Sludge Blended with Waste Coal for Nitrate and Methyl Red Removal: Synthesis, Oxidation, Performance and Environmental Consideration

Activation of Coconut Shell Charcoal and Application for Bleaching Used Cooking Oil

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