Impacts of shale gas production wastewater on disinfection byproduct formation: An investigation from a non-bromide perspective

Huang, Kuan; Tang, Hao; Xie, Yuefeng F.

doi:10.1016/j.watres.2018.07.048

Cited by 15 publications

(9 citation statements)

References 26 publications

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“…Three types of contaminated water were prepared by adding BPA (50 μM) into DI water, surface water collected from Lake Erie (Cleveland, OH), and Marcellus shale gas-produced water synthesized according to the reported water parameters (Table S3). , PMS solution was always prepared with DI water. Both half cells were buffered at pH 5 with 0.02 M acetate buffer.…”

Section: Methodsmentioning

confidence: 99%

Direct Electron-Transfer-Based Peroxymonosulfate Activation by Iron-Doped Manganese Oxide (δ-MnO₂) and the Development of Galvanic Oxidation Processes (GOPs)

Huang

Zhang

2019

Environ. Sci. Technol.

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248

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Manganese oxides have been recently investigated as excellent catalysts for peroxymonosulfate (PMS) activation, and the reported mechanisms are mostly forming reactive oxygen species (ROSs). This study investigated the use of iron-doped manganese oxide, synthesized via air oxidation under strong alkaline conditions. The oxidation of three substrates was affected by their adsorption at the catalyst surface, solution pH, and co-solutes. Common ROS scavengers inhibited the oxidation of bisphenol A (BPA), suggesting the possible involvement of ROSs; however, the PMS decomposition tests with and without BPA and the comparison with a 1O2-generation system ruled out the formation of ROSs and pointed to direct electron transfer between the adsorbed BPA and complexed PMS as the mechanism. To prove this mechanism, the catalyst was coated to graphite sheets and a galvanic oxidation process (GOP) was developed to separate BPA and PMS into two half cells. Upon PMS addition into one cell, BPA was quickly oxidized in the other cell, confirming the occurrence of electron transfer. The GOP system successfully degraded BPA in both surface water and hypersaline shale gas-produced water. Overall, this study developed a new catalyst for PMS activation and unveiled the advantages and potential applications of electron shuttling catalysts.

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Section: Methodsmentioning

confidence: 99%

Direct Electron-Transfer-Based Peroxymonosulfate Activation by Iron-Doped Manganese Oxide (δ-MnO₂) and the Development of Galvanic Oxidation Processes (GOPs)

Huang

Zhang

2019

Environ. Sci. Technol.

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248

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“…It was especially effective in reducing the formation of Br-DBPs, as the Br-DBPs decreased from 270 to 56 μg/L, a 79% removal. The impacts of the synthetic production wastewater blending on a baseline reference of DBP formation potential in river water have been quantified by the authors, ,, and the alteration of DBP formation was attributed to the introduction of bromide from production wastewater. The results of the present study implied the occurrence of bromide removal during the AE treatment of synthetic wastewater.…”

Section: Resultsmentioning

confidence: 99%

“…The natural water was a 0.45-μm-membrane-filtered grab sample from Swatara Creek (Middletown, Pennsylvania) (water quality parameters shown in Table S2), which was assumed free of production wastewater impact. A chlorine dose of 12 mg/L was applied to the mixture to initiate a DBP formation potential test, and no headspace was allowed in the bottle to minimize volatilization. , The chlorination took 24 h in absence of light at room temperature (21 °C) before chlorine residuals were quenched, and the samples were analyzed for DBPs. The chlorine quenching agents were sodium sulfite for THM analyses and ammonium chloride for HAA analyses, respectively, per EPA Methods 551.1 and 552.3.…”

Section: Methodsmentioning

confidence: 99%

Aerated Electrolysis for Reducing Impacts of Shale Gas Production Wastewater on Water Sources regarding Disinfection Byproduct Formation

Tang

Lin-lin

Xie

2018

Environ. Sci. Technol. Lett.

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Advances in treatment technologies of shale gas production wastewater are needed to minimize its toxic potency in polluted water sources. An aerated electrolysis (AE) process was employed for treatment of both synthetic and field production wastewaters. Results showed AE led to a 64% reduction in the formation of total disinfection byproducts (DBPs) analyzed in this study and 79% reduction in the formation of more toxic brominated DBPs (Br-DBPs) in polluted natural water in an 8-h treatment, suggesting a potential of scaling up as an in situ pretreatment strategy to reduce negative impacts caused by accidental spills or surface discharges during transportation. The mechanisms for reduced formation of DBPs were associated with bromide oxidation followed by bromine stripping from production wastewater, as evidenced by first-order kinetics on bromide removal. Along with bromide removal that led to the reduction of Br-DBP formation and decreased bromine substitution factors (BSFs), the results also revealed alteration of organic DBP precursors during the AE process by exploring the profile of formed DBP species. Formation of bromate in production wastewater was minimal, as bromate was consistently found below a reporting limit of 500 μg/L during the 8-h AE treatment. The lowest energy consumption at 5.9 kWh/m 3 warrants further investigations on process optimization. Application of this technology on site of shale gas exploration is beneficial for water utilities that are facing challenges due to contamination of water sources by production wastewater and inability of conventional water treatment processes in attenuation of DBP precursors.

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“…The details of surface water collection and chlorination can be found in Text S4 and Table S4. After 24 h of chlorination, samples were quenched with excess ammonium chloride and extracted immediately for trihalomethane (THM) and haloacetic acid (HAA) analyses following modified EPA Methods 551.1 and 552.3. , …”

Section: Methodsmentioning

confidence: 99%

“…HAA extracts were analyzed on an HP 6890 GC (Palo Alto, CA, USA) equipped with an ECD and an Agilent DB-1701 capillary column (30 m × 0.25 mm × 0.25 mm). The extraction and GC programing details can be found in our previous studies. , …”

Section: Methodsmentioning

confidence: 99%

Highly Efficient Bromide Removal from Shale Gas Produced Water by Unactivated Peroxymonosulfate for Controlling Disinfection Byproduct Formation in Impacted Water Supplies

Huang

Zhang

2020

Environ. Sci. Technol.

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Shale gas extraction processes generate a large amount of hypersaline wastewater, whose spills or discharges may significantly increase the bromide levels in downstream water supplies and result in the formation of brominated disinfection byproducts (DBPs) upon chlorination. Although a few studies have investigated selective bromide removal from produced water, the low removal efficiencies and complex system setups are not desirable. In this study, we examined a simple costeffective approach for selective bromide removal from produced water relying on the oxidation by unactivated peroxymonosulfate. More than 95% of bromide was removed as Br 2 (g) in less than 10 min under weakly acidic conditions without significant formation of Cl 2 (g) even when the chloride concentration was more than 2 orders of magnitude higher. A kinetic model considering the involved reactions was then developed to describe the process well under various reaction conditions. The organic compounds in the produced water neither noticeably lowered the bromide removal efficiency nor reacted with the halogen species to form halogenated byproducts. The tests in batch and continuously stirred tank reactor systems suggested that it was feasible to achieve both high bromide removal and neutral effluent pH such that further pH adjustment was not necessary before discharge. After the treatment, the effect of the produced water on DBP formation was largely eliminated.

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Impacts of shale gas production wastewater on disinfection byproduct formation: An investigation from a non-bromide perspective

Cited by 15 publications

References 26 publications

Direct Electron-Transfer-Based Peroxymonosulfate Activation by Iron-Doped Manganese Oxide (δ-MnO₂) and the Development of Galvanic Oxidation Processes (GOPs)

Direct Electron-Transfer-Based Peroxymonosulfate Activation by Iron-Doped Manganese Oxide (δ-MnO₂) and the Development of Galvanic Oxidation Processes (GOPs)

Aerated Electrolysis for Reducing Impacts of Shale Gas Production Wastewater on Water Sources regarding Disinfection Byproduct Formation

Highly Efficient Bromide Removal from Shale Gas Produced Water by Unactivated Peroxymonosulfate for Controlling Disinfection Byproduct Formation in Impacted Water Supplies

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Impacts of shale gas production wastewater on disinfection byproduct formation: An investigation from a non-bromide perspective

Cited by 15 publications

References 26 publications

Direct Electron-Transfer-Based Peroxymonosulfate Activation by Iron-Doped Manganese Oxide (δ-MnO2) and the Development of Galvanic Oxidation Processes (GOPs)

Direct Electron-Transfer-Based Peroxymonosulfate Activation by Iron-Doped Manganese Oxide (δ-MnO2) and the Development of Galvanic Oxidation Processes (GOPs)

Aerated Electrolysis for Reducing Impacts of Shale Gas Production Wastewater on Water Sources regarding Disinfection Byproduct Formation

Highly Efficient Bromide Removal from Shale Gas Produced Water by Unactivated Peroxymonosulfate for Controlling Disinfection Byproduct Formation in Impacted Water Supplies

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Direct Electron-Transfer-Based Peroxymonosulfate Activation by Iron-Doped Manganese Oxide (δ-MnO₂) and the Development of Galvanic Oxidation Processes (GOPs)

Direct Electron-Transfer-Based Peroxymonosulfate Activation by Iron-Doped Manganese Oxide (δ-MnO₂) and the Development of Galvanic Oxidation Processes (GOPs)