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

Fan, Zhenhong; Zhang, Qian; Li, Meng; Sang, Wenjiao; Qiu, Yue; Xie, Chenfeiyang

doi:10.1080/26395940.2019.1577702

Cited by 32 publications

(10 citation statements)

References 26 publications

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“…However, since the sludge is composed of other metals in addition to iron, these may also be acting in the persulfate activation process. Fan et al [33] and Hoa et al [31] found that PS can also be activated by manganese, aluminum, zinc, and copper, all of which are present in the red mud.…”

Section: Catalyst Optimal Conditions Resultsmentioning

confidence: 99%

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Persulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment

Domingues

Silva

Vaz

et al. 2021

Water

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Wastewaters from the olive oil industry are a regional environmental problem. Their phenolic content provides inherent toxicity, which reduces the treatment potential of conventional biological systems. In this study, Sulfate Radical based Advanced Oxidation Processes (SRbAOPs) are compared with advanced oxidation processes (namely Fenton’s peroxidation) as a depuration alternative. Synthetic olive mill wastewaters were submitted to homogeneous and heterogeneous SRbAOPs using iron sulfate and solid catalysts (red mud and Fe-Ce-O) as the source of iron (II). The homogenous process was optimized by testing different pH values, as well as iron and persulfate loads. At the best conditions (pH 5, 300 mg/L of iron and 600 mg/L of persulfate), it was possible to achieve 39%, 63% and 37% COD, phenolic compounds and TOC removal, respectively. The catalytic potential of a waste (red mud) and a laboratory material (Fe-Ce-O) was tested using heterogenous SRbAOPs. The best performance was achieved by Fe-Ce-O, with an optimal load of 1600 mg/L. At these conditions, 27%, 55% and 5% COD, phenolic compounds and TOC removal were obtained, respectively. Toxicity tests on A. fischeri and L. sativum showed no improvements in toxicity from the treated solutions when compared with the original one. Thus, SRbAOPs use a suitable technology for synthetic OMW.

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Section: Catalyst Optimal Conditions Resultsmentioning

confidence: 99%

“…With the pH tests, it was also found that, with the course of the reaction, regardless of the initial pH, the pH of the medium decreased. This can be justified by the reaction of the sulfate radical with OH − and the consequent formation of H + , as represented in Equation ( 9) and mentioned by Fan et al [33].…”

Section: Homogenous Catalysismentioning

confidence: 99%

Persulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment

Domingues

Silva

Vaz

et al. 2021

Water

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“…Using a modified method from Fan et al [25], corn cob was first cleaned with tap water, chopped into small pieces, dried at 100°C for 24 h in an oven, and pyrolyzed at 400°C for 4 h without oxygen. The produced biochar was then crushed to pass through a 35-mesh sieve.…”

Section: Biochar and Manganese Oxide-loaded Biochar (Mnox-biochar) Pr...mentioning

confidence: 99%

“…Carbon-based materials such as activated carbon and biochar can act as electron donors for persulfate to form sulfate radicals [24]. Biochar modified with manganese oxide was successfully applied to increase the persulfate oxidation efficiency [25]. In addition to being used as catalysts, manganese oxide and biochar were also employed as pollutant adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Peroxydisulfate Co-Treatment with MnOx-Loaded Biochar for COD Removal from Automobile Service Station Wastewater

Suwannarat

Pattanagulanan

Rueangsukhon

et al. 2022

Curr. Appl. Sci. Technol.

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This research was aimed at recycling agricultural waste and treating synthetic automobile service station wastewater. Wastewater was synthesized to two levels of COD concentration: 702 mg/L (WW-A) and 7,054 mg/L (WW-B). In the treatment process, 100 mM sodium peroxydisulfate with MnOx-loaded biochar (MnOx-Biochar) was applied. The MnOx-Biochar was produced by dipping corn cob biochar in 40 mM manganese sulfate followed by pyrolyzed at 600°C. The surface area, pore volume, pore size, and pH value at the zero-point charge of MnOx-Biochar were 130 m2/g, 0.044 cm3/g, 1.02 nm, and 7.05, respectively. From the FTIR spectrogram, a peak assignable to Mn-O was observed. The results showed that the initial pH of the wastewater did not affect the treatment efficiency. The optimum MnOx-Biochar dosage was 2 g/L. Equilibrium was reached within 120 min of reaction. During the first 15 min, the treatment rate constants (k) of the WW-A and WW-B treatment were 0.0647 min-1 and 0.0349 min-1, respectively. After 15 min, the k values of the WW-A and WW-B treatments were reduced to 0.0242 min-1 and 0.0094 min-1, respectively. The overall treatment efficiencies of the low COD wastewater (WW-A) and high COD wastewater (WW-B) were 97% and 78%, respectively. The treatment mechanisms involved both adsorption and oxidation. The adsorption efficiencies of the WW-A and WW-B treatments were 36% and 18%, respectively.

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“…The continuous flow UV/PS/ZVI process has not been previously studied; there is scarce information in the literature regarding the application of persulfate oxidation in a continuous-flow mode in general. According to a study by Fan et al, continuous flow persulfate oxidation was utilized to successfully degrade Orange G in an aqueous solution, where biochar made from sludge and linked with manganese oxide was used to activate persulfate [60]. The authors reported that the increase in PS concentration from 1 to 5 mM promoted the dye degradation; however, a further increase did not lead to significant change as excessive PS saturated the activation sites.…”

Section: Optimization Of the Continuous Flow Uv/ps/zvi Processmentioning

confidence: 99%

UV and Zero-Valent Iron (ZVI) Activated Continuous Flow Persulfate Oxidation of Municipal Wastewater

et al. 2022

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Currently, sulfate-radical-based advanced oxidation processes are promising candidates to become viable post-treatment processes for wastewater purification. In this work, a continuous flow UV light/persulfate (PS)/zero-valent iron (ZVI) system has been applied for wastewater treatment for the first time. The influence of certain photo-Fenton-like process parameters, such as space time, PS concentration, and PS to ZVI molar ratio, on the removal of total organic carbon (TOC), was examined using the Box–Behnken design. First, synthetic municipal wastewater was used for the experiments, and the polynomial regression model was constructed utilizing the real data by using the response surface methodology (RSM). The adequacy of the RSM model was assessed by analysis of variance, which showed that the model was reliable and could be applied to improve the process parameters for TOC removal. Moreover, both synthetic and real municipal wastewater were spiked with carbamazepine (CBZ), which is commonly prescribed as an antiepileptic drug, to investigate its fate in the UV/PS/ZVI system. With a space time of 60 min, PS concentration of 60 mM, and PS to ZVI molar ratio of 15, it was possible to remove 71% of TOC and completely remove CBZ from the synthetic municipal wastewater, whereas a 60% TOC removal and complete removal of CBZ were achieved at a space time of 50 min, PS concentration of 50 mM, and PS/ZVI molar ratio of 15 for the real municipal wastewater. This difference in TOC removal could possibly be linked to the complex matrix of the real wastewater and the presence of radical scavenging agents.

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

Cited by 32 publications

References 26 publications

Persulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment

Persulfate Process Activated by Homogeneous and Heterogeneous Catalysts for Synthetic Olive Mill Wastewater Treatment

Peroxydisulfate Co-Treatment with MnOx-Loaded Biochar for COD Removal from Automobile Service Station Wastewater

UV and Zero-Valent Iron (ZVI) Activated Continuous Flow Persulfate Oxidation of Municipal Wastewater

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