Removal of polycyclic aromatic hydrocarbons (PAHs) from textile dyeing sludge by ultrasound combined zero-valent iron/EDTA/Air system

Man, Xiaoyuan; Ning, Xun‐an; Zou, Haiyuan; Liang, Jieying; Sun, Jian; Lu, Xingwen; Sun, Jiekui

doi:10.1016/j.chemosphere.2017.10.043

Cited by 37 publications

(4 citation statements)

References 49 publications

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“…Minella and coworkers have reported that ZVI was inactive in a UV-A/H 2 O 2 system for the degradation of phenol at pH > 5, but the same system in the dark was already inactive at pH > 4 [101]. Rahim Pouran et al have found that the ZVI efficiency in the photo-Fenton process decreased at pH > 4, due to precipitation of ferric hydroxide that reduced radiation transmission [102]. Likewise, Grcic et al have shown that the specific (surface-area normalized) reaction rate constant for dye oxidation in wastewater using a UV-C/ZVI-Fenton system was 0.020, 0.019 and 0.012 L min −1 m −2 at pH 3.5, 4 and 5, respectively [7].…”

Section: Effect Of Ph On Zvi Performancementioning

confidence: 99%

Effect of pH on Zero Valent Iron Performance in Heterogeneous Fenton and Fenton-Like Processes: A Review

2018

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Heterogeneous Fenton processes with solid catalysts have gained much attention for water and wastewater treatment in recent years. In the field of solid catalysts, zero valent iron (ZVI) is among the most applicable due to its stability, activity, pollutant degradation properties and environmental friendliness. The main limitation in the use of ZVI in heterogeneous Fenton systems is due to its deactivation in neutral and alkaline conditions, and Fenton-like processes have been developed to overcome this difficulty. In this review, the effect of solution pH on the ZVI-Fenton performance is discussed. In addition, the pH trend of ZVI efficiency towards contaminants removal is also considered in oxic solutions (i.e., in the presence of dissolved O2 but without H2O2), as well as in magnetic-field assisted Fenton, sono-Fenton, photo-Fenton and microwave-Fenton processes at different pH values. The comparison of the effect of pH on ZVI performance, taking into account both heterogeneous Fenton and different Fenton-like processes, can guide future studies for developing ZVI applications in water and wastewater treatment.

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Section: Effect Of Ph On Zvi Performancementioning

confidence: 99%

Effect of pH on Zero Valent Iron Performance in Heterogeneous Fenton and Fenton-Like Processes: A Review

2018

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“…[27] At the same time, the higher the heating rate, the larger the dDSC value, which indicated that the heat release rate was proportional to the heating rate. Because of the diversity of PDS components, [28] the pyrolysis process of PDS was relatively complex. Both endothermic and exothermic processes existed in the pyrolysis process, and the final thermal effect should be determined by the two positive and negative effects of endothermic and exothermic.…”

Section: Weight Loss Characteristics Analysismentioning

confidence: 99%

Pyrolysis of predried dyeing sludge: Weight loss characteristics, surface morphology, functional groups and kinetic analysis

Wang

Xu²,

Cao

et al. 2021

Can J Chem Eng

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The weight loss characteristics, surface morphology, functional group, and kinetic parameters of predried dyeing sludge (PDS) pyrolysis was studied for the first time in this paper. The contents of both volatile matter and organic matter in PDS char both decreased with the increase of pyrolysis temperature. The PDS pyrolysis process can be divided into four stages: S 1 (30 C-180 C)-water evaporation, S 2 (180 C-500 C)-decomposition of organic compounds such as aliphatic compounds and biomass fibres, S 3 (500 C-900 C)-decomposition of the former stage residues, and S 4 (900 C-1350 C)-decomposition of carbonaceous material remaining in the char and vaporization of partial ash. With the increase

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“…PAHs (>3 rings) have a stable chemical structure with the character of lipotropy and hydrophobicity and thus are difficult to be biodegraded . The current methods for PAH removal mainly include chemical methods, such as coagulation, chemical oxidation, ultrasonic, and adsorption . However, these methods are not suitable for water pollution treatment in large river basins.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Benzofluoranthrene Removal in Surface Flow Constructed Wetlands with the Addition of Carbon

Cao

Kang

et al. 2021

ACS Omega

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Polycyclic aromatic hydrocarbons (PAHs), as hazardous pollutants, could be removed by constructed wetlands (CWs). While the traditional substrate of CWs has a weak adsorption capacity for PAHs, in this study, the carbonous fillersactivated carbon (AC) and biocharwere added into the substrate of surface flow CWs to improve the removal performance of benzofluoranthrene (BbFA), a typical PAH. The results showed that the BbFA removal efficiencies in CWs with the addition of AC and biochar were 11.8 and 1.2% higher than those in the Control group, respectively. Simultaneously, the removal efficiencies of NO3 ––N were 42.8 and 68.4% in these two CWs, while the BbFA content in the substrate and plants with the addition of carbon was lower than that in the Control group. The addition of carbonous filler reduced the absorption of PAHs by plants in CWs and enhanced microbial degradation. The microbial community results showed that the relative abundance of Proteobacteria, especially γ-proteobacteria, was higher with the addition of fillers, which related to PAH degradation.

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Removal of polycyclic aromatic hydrocarbons (PAHs) from textile dyeing sludge by ultrasound combined zero-valent iron/EDTA/Air system

Cited by 37 publications

References 49 publications

Effect of pH on Zero Valent Iron Performance in Heterogeneous Fenton and Fenton-Like Processes: A Review

Effect of pH on Zero Valent Iron Performance in Heterogeneous Fenton and Fenton-Like Processes: A Review

Pyrolysis of predried dyeing sludge: Weight loss characteristics, surface morphology, functional groups and kinetic analysis

Enhanced Benzofluoranthrene Removal in Surface Flow Constructed Wetlands with the Addition of Carbon

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