Pyrolytic temperature dependent conversion of sewage sludge to carbon catalyst and their performance in persulfate degradation of 2-Naphthol

Wang, Xiaopeng; Gu, Lin; Zhou, Pin; Zhu, Nanwen; Li, Cheng-xu; Tao, Hong; Wen, Haifeng; Zhang, Daofang

doi:10.1016/j.cej.2017.04.101

Cited by 85 publications

(14 citation statements)

References 37 publications

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“…With a 40 mM loading rate, the capacity of Mn-loaded SDBC to activate PS for OG degradation is three times higher than pristine SDBC. In addition to loaded manganese component, other mineral contents such as iron could also activate PS for OG degradation, as previous work suggested [4,10]. The potential activation mechanism can be expressed as below [24]:…”

Section: Activation Mechanismmentioning

confidence: 99%

“…The sludge-derived biochar (SDBC) is a carbon-mineral adsorbent with abundant mineral oxides such as iron oxides, which could be a potential effective material for PS activation. A few previous works that investigate the efficiency of PS activation by SDBC have demonstrated that the activation mechanism of PS by SDBC was mainly attributed to metals such as iron oxides and presence of oxygen-containing functional groups such as semiquinone [4,9,10]. However, the relatively poor performance of SDBC and pursuit of more efficient catalysts promote further researches to improve the catalytic activity of SDBC by facile means.…”

Section: Introductionmentioning

confidence: 99%

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Activation of persulfate by manganese oxide-modified sludge-derived biochar to degrade Orange G in aqueous solution

Fan

Zhang

et al. 2019

Environmental Pollutants and Bioavailability

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Manganese oxide-loaded sludge-derived biochar (Mn-SDBC) was synthesized and used to activate persulfate (PS) for Orange G (OG) degradation. X-ray fluorescence and Fourier transform infrared spectroscopy analysis indicated that the manganese oxides were successfully loaded on the SDBC. The result of batch experiments suggests that OG can be efficiently degraded by PS activated by Mn-SDBC. Metal loading rate, biochar dosage and PS concentration play a crucial role in experiments, whereas pH has a minor effect on OG removal. The free radical quenching experiment was investigated to determine the predominant radical species, and the activation mechanism was also illustrated. The as-synthesized Mn-SDBC can efficiently activate PS and removal OG under a continuous flow condition in a fixed-bed column. Our study suggests that Mn-SDBC would be a promising catalyst for the remediation of dye-contaminated wastewater.

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Section: Activation Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Activation of persulfate by manganese oxide-modified sludge-derived biochar to degrade Orange G in aqueous solution

Fan

Zhang

et al. 2019

Environmental Pollutants and Bioavailability

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“…Biochar and biochar‐based catalysts are effective catalysts in advanced oxidation reactions. [ 105,106 ] Biochar with abundant surface functional groups, porous structures, and high specific surface areas can donate, accept, or transfer electrons to the surrounding environment. [ 107 ] This renders biochar to be a good candidate as AOPs catalyst.…”

Section: Conversion Of Biomasses Into Biochar Catalystsmentioning

confidence: 99%

Hydrothermal and Pyrolytic Conversion of Biomasses into Catalysts for Advanced Oxidation Treatments

Zheng

et al. 2020

Adv Funct Materials

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Biomasses are very important natural products. Transferring biomass into catalysts for the advanced oxidation process (AOP) via heat treatment has attracted extensive attention. This review systematically introduces and summarizes two kinds of innovative biomass‐based catalysts according to the treating temperature. At low temperature (<300 °C), biomasses are converted into hydrothermal carbonation carbon (HTCC) with semiconductive properties for photocatalysis application. At high temperature (>300 °C), by contrast, the products lose their semiconductive nature and become a conductive carbon‐based conductor (biochar). They usually work as AOP catalysts by activating oxidant of O2, H2O2, and peroxysulfate for environmental treatment. This review summarizes and compares HTCC and biochar according to their formation process, structure, catalytic mechanism, and key points for the activity enhancement. The active units in HTCC are the sp2‐hybridized polyfuran unit while those in biochar are the persistent free radicals, nitrogen‐containing unit, or defects. HTCC converts water into OH radicals by using the photoexcited electron/hole pairs induced by solar illumination, while biochar activates oxidants via the active unit on its surface. More importantly, this review summarizes and demonstrates the key points to obtain high‐efficiency HTCC and biochar catalysts. Finally, conclusions are drawn and the future aspects for biomass‐based catalysis are given.

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“…At present, the treatment methods for 2-naphthol wastewater mainly include adsorption [7,8], biodegradation [9,10], electrochemical degradation [11], photocatalytic oxidation [12] and advanced oxidation processes (AOPs) [13,14]. Using immobilized organobentonite or modified biochar as adsorbent to remove 2-naphthol was widely studied, but none of them could degrade 2-naphthol fundamentally [7,15].…”

Section: Introductionmentioning

confidence: 99%

“…Factors such as harsher terms and longer residence time also greatly limit the practical application of biological treatments [6]. The degradation of 2-naphthol in aqueous solution by AOPs has been extensively studied, Wang et al [14] used sludge-based biochar as a heterogeneous catalyst for the persulfate degradation of 2-naphthol, only 88.7% of 2-naphthol and 47% of TOC were removed. The extremely low TOC degradation rate indicates the inadequacy of Wang's method in mineralizing 2-naphthol.…”

Section: Introductionmentioning

confidence: 99%

Degradation of 2-Naphthol in Aqueous Solution by Electro-Fenton System with Cu-Supported Stainless Steel Electrode

Cheng

Zhang

Zhou

et al. 2022

Water

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For the treatment of 2-naphthol wastewater, the homogeneous electro-Fenton process was considered as an effective method but some disadvantages greatly restrict its application. The three-dimensional electro-Fenton (3D-EF) system using a nano zero-valent iron-supported biochar (NZVIs-BC) particle electrode and a Cu-supported stainless steel electrode (Cu-SSE) was proposed to avoid the disadvantages of the homogeneous electro-Fenton. In this work, the 3D-EF system was developed, which consisted of a Cu-SSE (cathode), a graphite rod (anode) and a NZVIs-BC particle electrode. The effect of the ratio of ferrous sulfate heptahydrate (FS) to rice straw (RS), CuSO4•5H2O amount, initial pH of 2-naphthol wastewater and current intensity (the output current of the power supply) on the removal rate of 2-naphthol were investigated. It is noteworthy that more than 98.36% of the 2-naphthol in aqueous solution was removed by the 3D-EF system, and only about 60.09% of 2-naphthol was removed by the homogeneous electro-Fenton system. Furthermore, naphthalene, benzoic acid, β-naphthoquinone, 1, 2-naphthalenedione, phenol and aromatic hydrocarbon were the main degradation products of 2-naphthol by the 3D-EF system; the toxicity of 2-naphthol wastewater was also greatly reduced.

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Pyrolytic temperature dependent conversion of sewage sludge to carbon catalyst and their performance in persulfate degradation of 2-Naphthol

Cited by 85 publications

References 37 publications

Activation of persulfate by manganese oxide-modified sludge-derived biochar to degrade Orange G in aqueous solution

Activation of persulfate by manganese oxide-modified sludge-derived biochar to degrade Orange G in aqueous solution

Hydrothermal and Pyrolytic Conversion of Biomasses into Catalysts for Advanced Oxidation Treatments

Degradation of 2-Naphthol in Aqueous Solution by Electro-Fenton System with Cu-Supported Stainless Steel Electrode

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