Treatment of real wastewater by photoelectrochemical methods: An overview

Divyapriya, Govindaraj; Singh, Seema; Martínez‐Huitle, Carlos A.; Scaria, Jaimy; Karim, Ansaf V.; Nidheesh, P.V.

doi:10.1016/j.chemosphere.2021.130188

Cited by 93 publications

(31 citation statements)

References 230 publications

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“…The potential application of PEC techniques as the emerging E-AOTs to remediate toxic and/or bio-refractory organic and inorganic contaminants in the wastewaters and waste gases has been well-proven and future applicability. The overall oxidation efficiencies of innovative E-AOTs can be easily controlled through automation, and the E-AOTs processes can be compacted with less-space occupation and cost-effective applicability [104].…”

Section: Discussionmentioning

confidence: 99%

“…Furthermore, developing innovative advanced oxidation techniques (AOTs) coupling with photo(electro)catalytic reactions with the aids of chemical oxidants such as ozone are also highly required for the AOTs development. As a matter of fact, successful development of newly AOTs relies on the collaboration of analytical chemists, electrochemists, and engineers to ensure potential application and effective exploration of the aforementioned measures [104]. Nevertheless, many efforts are highly mandatory in the future.…”

Section: Future Developmentmentioning

confidence: 99%

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A Review of Electrical Assisted Photocatalytic Technologies for the Treatment of Multi-Phase Pollutants

Yuan

Zheng

et al. 2021

Catalysts

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This article reviews the fundamental theories and reaction mechanisms of photocatalytic technologies with the assistance of electrical field for degrading multi-phase pollutants. Photo(electro)catalysis including photocatalytic oxidation (PCO) and photoelectrocatalytic oxidation (PECO) have been a potential technologies applied for the treatment of organic and inorganic compounds in the wastewaters and waste gases, which has been treated as a promising technique by using semiconductors as photo(electro)catalysts to convert light or electrical energy to chemical energy. Combining photocatalytic processes with electrical field is an option to effectively decompose organic and inorganic pollutants. Although photocatalytic oxidation techniques have been used to decompose multi-phase pollutants, developing efficient advanced oxidation technologies (AOTs) by combining photocatalysis with electrical potential is urgently demanded in the future. This article reviews the most recent progress and the advances in the field of photocatalytic technologies combined with external electrical field, including the characterization of nano-sized photo(electro)catalysts, the degradation of multi-phase pollutants, and the development of electrical assisted photocatalytic technologies for the potential application on the treatment of organic and inorganic compounds in the wastewaters and waste gases. Innovative oxidation techniques regarding photo(electro)catalytic reactions with and without oxidants are included in this review article.

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Section: Discussionmentioning

confidence: 99%

Section: Future Developmentmentioning

confidence: 99%

A Review of Electrical Assisted Photocatalytic Technologies for the Treatment of Multi-Phase Pollutants

Yuan

Zheng

et al. 2021

Catalysts

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“…Meanwhile, the EC increased with j and electrolysis time, thus the most rapid and efficient process was observed at high j. Obviously, as seen Figure 5b, the j has a strong effect of the EC; however, agitated beaker reactor could not be representative for energetic requirements and oxidation environment for scale-up conditions, in terms of effectiveness, mass transport and oxidants production [46]. Therefore, more studies are in progress in order to decrease EC and consequently, the relative costs.…”

Section: Efficiency and Energy Consumptionmentioning

confidence: 98%

Achieving Electrochemical-Sustainable-Based Solutions for Monitoring and Treating Hydroxychloroquine in Real Water Matrix

et al. 2022

Self Cite

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Hydroxychloroquine (HCQ) has been extensively consumed due to the Coronavirus (COVID-19) pandemic. Therefore, it is increasingly found in different water matrices. For this reason, the concentration of HCQ in water should be monitored and the treatment of contaminated water matrices with HCQ is a key issue to overcome immediately. Thus, in this study, the development of technologies and smart water solutions to reach the Sustainable Development Goal 6 (SDG6) is the main objective. To do that, the integration of electrochemical technologies for their environmental application on HCQ detection, quantification and degradation was performed. Firstly, an electrochemical cork-graphite sensor was prepared to identify/quantify HCQ in river water matrices by differential pulse voltammetric (DPV) method. Subsequently, an HCQ-polluted river water sample was electrochemically treated with BDD electrode by applying 15, 30 and 45 mA cm−2. The HCQ decay and organic matter removal was monitored by DPV with composite sensor and chemical oxygen demand (COD) measurements, respectively. Results clearly confirmed that, on the one hand, the cork-graphite sensor exhibited good current response to quantify of HCQ in the river water matrix, with limit of detection and quantification of 1.46 mg L−1 (≈3.36 µM) and 4.42 mg L−1 (≈10.19 µM), respectively. On the other hand, the electrochemical oxidation (EO) efficiently removed HCQ from real river water sample using BDD electrodes. Complete HCQ removal was achieved at all applied current densities; whereas in terms of COD, significant removals (68%, 71% and 84% at 15, 30 and 45 mA cm−2, respectively) were achieved. Based on the achieved results, the offline integration of electrochemical SDG6 technologies in order to monitor and remove HCQ is an efficient and effective strategy.

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“…Many technologies, such as electrochemical [ 7 ], photoelectrochemical [ 8 ], microbial degradation [ 9 ], ions exchange [ 10 , 11 ], Fenton reaction [ 2 ], membrane separation [ 12 ], adsorption [ 13 ], and so on, have been developed to remove organic dyes from polluted water. In comparison, adsorption technology is widely used due to its low cost, ease of operation, and high efficiency [ 14 ].…”

Section: Introductionmentioning

confidence: 99%

Porous ZnCl2-Activated Carbon from Shaddock Peel: Methylene Blue Adsorption Behavior

et al. 2022

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It is of great interest and importance to resource utilization of waste biomass to produce porous carbon for environmental treatments. Pore structure and properties of the obtained carbon mainly relate to carbonization conditions and biomass types. In this work, a series of porous, biomass-activated carbons (AC) were prepared using shaddock peel, with ZnCl2 as a pore-forming agent. The effect of carbonization temperature and the mass ratio between ZnCl2 and shaddock peel were thoroughly investigated. The material composition, surface chemical properties, and surface structures of samples were carefully characterized. The specific surface area and adsorption capacity to methylene blue (MB) of adsorbents were changed with the carbonization temperature and the mass ratios between ZnCl2 and shaddock peel; when the temperature was at 1000 °C and the mass ratio was equal to 2:1, the resulting adsorbent had the largest specific surface area of 2398.74 m2/g and average pore size of 3.04 nm, which showed the highest adsorption capacity to MB to be 869.57 mg/g. The adsorption processes of biomass AC adsorbent matched the pseudo-second-order kinetic model and Langmuir isotherm model. This efficient and environmentally friendly biomass AC adsorbent from shaddock peel, activated by ZnCl2, is a promising candidate for the treatment of water pollution.

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Treatment of real wastewater by photoelectrochemical methods: An overview

Cited by 93 publications

References 230 publications

A Review of Electrical Assisted Photocatalytic Technologies for the Treatment of Multi-Phase Pollutants

A Review of Electrical Assisted Photocatalytic Technologies for the Treatment of Multi-Phase Pollutants

Achieving Electrochemical-Sustainable-Based Solutions for Monitoring and Treating Hydroxychloroquine in Real Water Matrix

Porous ZnCl2-Activated Carbon from Shaddock Peel: Methylene Blue Adsorption Behavior

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