Electrocatalytic hydrodechlorination system with antiscaling and anti-chlorine poisoning features for salt-laden wastewater treatment

Hu, Lin; Shi, Li; Shen, Fei; Tong, Qiuwen; Lv, Xiaoshu; Li, Yiming; Liu, Zixun; Ao, Liang; Zhang, Xianming; Jiang, Guangming; Hou, Lijun

doi:10.1016/j.watres.2022.119210

Cited by 20 publications

(10 citation statements)

References 45 publications

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“…A C–Cu catalyst was prepared using the same procedure as employed for the TiO 2 –Cu catalyst, except that TiO 2 was replaced with carbon black. The working electrode was also prepared following a reported method . Typically, 16.0 mg of the catalyst and 4.0 mg of carbon black were dispersed in a mixture of isopropyl alcohol (0.8 mL), ethanol (3.2 mL), and Nafion (40.0 uL) via ultrasonication.…”

Section: Methodsmentioning

confidence: 99%

Electronic Structure Optimization and Proton-Transfer Enhancement on Titanium Oxide-Supported Copper Nanoparticles for Enhanced Nitrogen Recycling from Nitrate-Contaminated Water

Liu

Shen

Shi

et al. 2023

Environ. Sci. Technol.

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Electrocatalytic reduction of nitrate to NH 3 (NO3RR) on Cu offers sustainable NH 3 production and nitrogen recycling from nitrate-contaminated water. However, Cu affords limited NO3RR activity owing to its unfavorable electronic state and the slow proton transfer on its surface, especially in neutral/alkaline media. Furthermore, although a synchronous "NO3RR and NH 3 collection" system has been developed for nitrogen recycling from nitrate-laden water, no system is designed for natural water that generally contains low-concentration nitrate. Herein, we demonstrate that depositing Cu nanoparticles on a TiO 2 support enables the formation of electron-deficient Cu δ+ species (0 < δ ≤ 2), which are more active than Cu 0 in NO3RR. Furthermore, TiO 2 −Cu coupling induces local electric-field enhancement that intensifies water adsorption/ dissociation at the interface, accelerating proton transfer for NO3RR on Cu. With the dual enhancements, TiO 2 −Cu delivers an NH 3 -N selectivity of 90.5%, mass activity of 41.4 mg-N h g Cu −1 , specific activity of 377.8 mg-N h −1 m −2 , and minimal Cu leaching (<25.4 μg L −1 ) when treating 22.5 mg L −1 of NO 3 − -N at −0.40 V, outperforming most of the reported Cu-based catalysts. A sequential NO3RR and NH 3 collection system based on TiO 2 −Cu was then proposed, which could recycle nitrogen from nitratecontaminated water under a wide concentration window of 22.5−112.5 mg L −1 at a rate of 209−630 mg N m −2 h −1 . We also demonstrated this system could collect 83.9% of nitrogen from NO 3 − -N (19.3 mg L −1 ) in natural lake water.

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Section: Methodsmentioning

confidence: 99%

Electronic Structure Optimization and Proton-Transfer Enhancement on Titanium Oxide-Supported Copper Nanoparticles for Enhanced Nitrogen Recycling from Nitrate-Contaminated Water

Liu

Shen

Shi

et al. 2023

Environ. Sci. Technol.

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“…Hu et al prevented scaling and the effect of Cl À on the catalytic effect of Pd catalysts by adding a commercial anti-scaling agent, 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC). [44] A PBTCÀ Pd bond is formed between PBTC and Pd, and PBTC can release protons through the PBTCÀ Pd bond to form more electron-deficient Pd species (Figure 5A). This regulatory strategy greatly enhanced the dechlorination efficiency as well as the stability of Pd.…”

Section: Electron-deficient Pdmentioning

confidence: 99%

“…[52] By experimental comparison, it was found that pyrrolicÀ N played a decisive role in ECH. Nitrogen doping resulted in a strong interaction between N and Pd, thus modulating the electronic [44] Copyright 2022, Elsevier. B) a. XPS spectra of Pd 3d of Pd/Ni x Al 100-X À LDHÀ OH v ; b. XPS spectra of O 1s of Pd/Ni x Al 100-X À LDHÀ OH v ; c. Pseudo-first-order reaction of the EHDC processes; d. Specific and mass activities of catalysts.…”

Section: Adsorption For Target Pollutantsmentioning

confidence: 99%

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Efficient Palladium Catalysts: Application and Challenges of Electrocatalytic Hydrodechlorination Technology in Wastewater Treatment

Li,

Kong

2023

ChemCatChem

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This review summarizes the research progress of palladium (Pd) catalysts in electrocatalytic hydrodechlorination (ECH) for the removal of chlorinated organic pollutants (COPs). ECH technology is a new type of green water treatment technology without secondary pollution, which has excellent removal effect on COPs. Pd is widely used in the field of ECH due to its excellent catalytic properties. However, the easy deactivation and high price of Pd have limited the application of Pd catalysts in practical wastewater treatment. Researchers have improved the performance of Pd catalysts for ECH by improving the morphological structure (dispersion, particle size, crystalline surface) and electronic states (electron‐rich Pd, electron‐deficient Pd). It is also found that modulation of the adsorption abilities of Pd catalysts can greatly improve the catalytic activity. The factors affecting the stability of Pd catalysts are also investigated, and the future large‐scale mature application of ECH technology is envisioned. The ability to prepare single‐atom Pd catalysts in a relatively simple way is a future direction, which will achieve 100% atom utilization and thus significantly reduce the cost of Pd. This review details the frontier research on Pd catalysts in the field of ECH, which can provide some good strategies for related researchers.

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“…The electrochemical oxidation (EO) process has been proven to be effective for the inactivation of microorganisms in wastewater by generating various oxidants in the electrode surface or bulk solution . Reactive oxygen species ( • OH, O 2 – , H 2 O 2 , O 3 , and 1 O 2 ) and active chlorine species (ClO – , HClO, and Cl 2 ) would be generated by the oxidation of H 2 O and chloride ions, respectively. − The reaction between oxidants and the microorganisms caused the lysis of the cell membrane, thus leading to the inactivation of microorganisms . Moreover, the EO process would also benefit the degradation and transformation of concerned contaminants and thus facilitate further purification of wastewater.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Purification and Disinfection of Restaurant Wastewater by Electro-coagulation Coupled with an Electro-oxidation Process: From Lab Scale to Field Scale

Zhang

Zhu

et al. 2023

ACS EST Eng.

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Several Covid-19 infection events have been reported in restaurant and food-processing factory scenarios. To block the transmission of waterborne pathogens and protect human's safety, it is urgent to take action for the purification and disinfection of restaurant wastewater. Considering the requirement of restaurant wastewater treatment technology, such as limited spaces, low capital cost, simple to operate, and high efficiency, an integrated electro-coagulation (EC) and electro-oxidation (EO) process was put forward. The lab-scale system treatment results illustrated that the composition of restaurant wastewater underwent significant changes. The chemical oxygen demand value decreased from 1680 to 344 mg/L. Total phosphate, total nitrogen, suspended solids, petroleum, animal fat and vegetable oils, and anionic surfactants achieved a distinct decrease. Moreover, the removal of Escherichia coli and Phi6 illustrated the satisfactory disinfection performance of the EC−EO system. The acute toxicity of the EC−EO effluent was reduced compared to that of raw wastewater. Comparing the results of EC treatment with EO treatment, the EC process provided more significant contributions to the purification and disinfection of wastewater than the EO process. The oxidants generated in the EO process would ensure the residual purification and disinfection performance through the long sewer pipe. The physical−chemical parameters and disinfection performances of the field-scale EC−EO system met the requirement of "Wastewater quality standards for discharge to municipal sewers-GB/T 31962-2015". However, a certain amount of disinfectant byproducts were formed in the effluent. Moreover, the techno-economic analysis further illustrated the feasibility of the integrated EC−EO system for the purification and disinfection of restaurant wastewater.

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Electrocatalytic hydrodechlorination system with antiscaling and anti-chlorine poisoning features for salt-laden wastewater treatment

Cited by 20 publications

References 45 publications

Electronic Structure Optimization and Proton-Transfer Enhancement on Titanium Oxide-Supported Copper Nanoparticles for Enhanced Nitrogen Recycling from Nitrate-Contaminated Water

Electronic Structure Optimization and Proton-Transfer Enhancement on Titanium Oxide-Supported Copper Nanoparticles for Enhanced Nitrogen Recycling from Nitrate-Contaminated Water

Efficient Palladium Catalysts: Application and Challenges of Electrocatalytic Hydrodechlorination Technology in Wastewater Treatment

Enhanced Purification and Disinfection of Restaurant Wastewater by Electro-coagulation Coupled with an Electro-oxidation Process: From Lab Scale to Field Scale

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