Removal of p-Nitrophenol from simulated sewage using steel slag: Capability and mechanism

Zhao, Yibo; Wang, Lin; Zhu, Linchao; Gao, Fei; Xu, Xinru; Yang, Jingyi

doi:10.1016/j.envres.2022.113450

Cited by 18 publications

(6 citation statements)

References 64 publications

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Section: Resultsmentioning

confidence: 99%

“…The -OH absorption peak exhibited variations in the wave number from 3430 cm −1 to 3421 cm −1 after adsorption, moving towards a lower wave number, indicating hydrogen bond formation. Thus, the hydrogen bonding interaction can be identified as a hydrogen bond formed by Zn-OH with -OH and -NO2 [10]. Additionally, the benzene ring's composition in ZIF-8-PhIm attracts benzene ring-containing compounds through π-π superposition interactions [47][48][49][50].…”

Section: Adsorption Mechanismmentioning

confidence: 99%

“…However, adsorption is commonly used because it is safe, efficient and easy to implement [ 8 , 9 ]. Zhao et al [ 10 ] used steel slag to remove p -nitrophenol with an adsorption amount of 109.66 mg/g. Dos Santos et al [ 11 ] modified montmorillonite clay, and its p -nitrophenol adsorption ability was 122.09 mg/g.…”

Section: Introductionmentioning

confidence: 99%

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Removal of p-Nitrophenol by Adsorption with 2-Phenylimidazole-Modified ZIF-8

Zhao

Yuan

et al. 2023

Molecules

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Petrochemical wastewater contains p-nitrophenol, a highly toxic, bioaccumulative and persistent pollutant that can harm ecosystems and environmental sustainability. In this study, ZIF-8-PhIm was prepared for p-nitrophenol removal from petrochemical wastewater using solvent-assisted ligand exchange (SALE) with 2-phenylimidazole(2-PhIm). The ZIF-8-PhIm’s composition and structure were characterised using the XRD, SEM, FT-IR, 1H NMR, XPS and BET methods. The adsorption effect of ZIF-8-PhIm on p-nitrophenol was investigated with the static adsorption method. Compared to the ZIF-8 materials, ZIF-8-PhIm exhibited stronger π-π interactions, produced a multistage pore structure with larger pore capacity and size, and had increased hydrophilicity and exposure of adsorption sites. Under optimised conditions (dose = 0.4 g/L, T = 298 K, C0 = 400 mg/L), ZIF-8-PhIm achieved an adsorption amount of 828.29 mg/g, which had a greater p-nitrophenol adsorption capacity compared to the ZIF-8 material. The Langmuir isotherm and pseudo-second-order kinetic models appropriately described the p-nitrophenol adsorption of ZIF-8-PhIm. Hydrogen bonding and π-π interactions dominated the p-nitrophenol adsorption of ZIF-8-PhIm. It also had relatively good regeneration properties.

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Section: Resultsmentioning

confidence: 99%

Section: Adsorption Mechanismmentioning

confidence: 99%

See 1 more Smart Citation

Removal of p-Nitrophenol by Adsorption with 2-Phenylimidazole-Modified ZIF-8

Zhao

Yuan

et al. 2023

Molecules

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“…It was also noticed that SS composition after TA adsorption was approximately the same structure as before adsorption. Zhao et al [83] compared the steel slag XRD characteristics before and after adsorption of p-Nitrophenol and reported no significative changes in the crystalline phase of SS. Similarly, the same authors indicated the reduction in Ca(OH) 2 and Ca 2 SiO 4 peaks after adsorption.…”

Section: Characterization Of Ss-ta Before Adsorptionmentioning

confidence: 99%

Efficient Removal of Tannic Acid from Olive Mill Wastewater Using Carbon Steel Slag

Sarti

Mansouri

Yahia

et al. 2023

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Mediterranean countries experience a large production of olive oil, thus generating huge quantities of non-biodegradable vegetation waters. The discharge of these effluents into aquatic environments seriously affects the quality of surface waters. This study investigated the potential use of carbon steel slag (SS) as an adsorbent and improver for reducing olive mill wastewater (OMWW) toxicity. The elemental and structural characterization of SS was carried out using inductively coupled plasma-optical emission spectrometry (ICP/EOS), X-ray fluorescence (XRF), X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and Brunauer–Emmett–Teller (BET) analysis. OMWW characterization indicated that the effluent was acidic in nature, with a pH of 4.8, a higher conductivity reaching 14.92 mS/cm, higher COD of 157.31 g/L, rich in organic matter 112.33 g/L, and total phenolic compounds of 11.13 g/L. The neutralization capacity of SS was demonstrated by reducing the OMWW’s acidic character. Afterward, the adsorption of tannic acid (TA) was investigated using SS. Parameters such as contact time, initial TA concentration, adsorbent dosage, pH, and temperature were investigated. The kinetic study indicated that the adsorption of TA onto SS fitted well with the second pseudo-order (r = 0.99) and Elovich (r = 0.98) models, indicating that the adsorption of TA was mainly chemical and depends on the reactions of oxide hydrolysis and hydroxides dissolution. Moreover, Langmuir isotherm has greatly described the adsorption of TA on SS (R = 0.997), suggesting that the surface of SS is homogenous, and the adsorption occurs mainly in monolayer. The maximum adsorption capacity reached 714.28 mg/g, indicating the higher capacity of SS to reduce the polyphenolic compounds in OMWW. This study demonstrated that SS residue from the steelmaking industry could present a highly interesting material for OMWW remediation.

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“…Pt-group metals in forms of rods, wires prisms, or branched nanostructures, are typically utilized as catalysts for the hydrogenation of nitro compounds. Additionally, the literature presents the possibility to involve the adsorption process for the removal of 4-NP using different materials: steel slag (with an adsorption capacity of 109.66 mg/g) [ 22 ], and cyclodextrin polymer-entrapped nano zero-valent iron [ 23 ]. A composite prepared from clay and Cocos nucifera shell was proposed by Adebayo and Areo for the removal of phenol and 4-NP.…”

mentioning

confidence: 99%