Efficient removal of Tetracycline-Cu complexes from water by electrocoagulation technology

Zhang

Energy & Environ Materials

et al. 2023

Defect engineering can give birth to novel properties for adsorption and photocatalysis in the control of antibiotics and heavy metal combined pollution with photocatalytic composites. However, the role of defects and the process mechanism are complicated and indefinable. Herein, TiO2/CN/3DG was fabricated and defects were introduced into the tripartite structure with separate O2 plasma treatment for the single component. We find that defect engineering can improve the photocatalytic activity, attributing to the increase of the contribution from h+ and OH. In contrast to TiO2/CN/3DG with a photocatalytic tetracycline removal rate of 75.2%, the removal rate of TC with D‐TiO2/CN/3DG has increased to 88.5%. Moreover, the reactive sites of tetracycline can be increased by adsorbing on the defective composites. The defect construction on TiO2 shows the advantages in tetracycline degradation and Cu2+ adsorption, but also suffers significant inhibition for the tetracycline degradation in a tetracycline/Cu2+ combined system. In contrast, the defect construction on graphene can achieve the cooperative removal of tetracycline and Cu2+. These findings can provide new insights into water treatment strategies with defect engineering.

Section: Resultsmentioning

confidence: 99%

Revealing the Role of Defect in 3D Graphene‐Based Photocatalytic Composite for Efficient Elimination of Antibiotic and Heavy Metal Combined Pollution

Zhang

Energy & Environ Materials

et al. 2023

“…Os íons gerados pelo ânodo e cátodo de cobre não foram suficientes nas condições experimentais estudadas para tornar o meio oxidativo para degradação de todos os compostos farmacêuticos estudados. A utilização de ânodo e cátodo metálicos é conhecida em processos de eletrocoagulação, realizando a remoção dos poluentes por meio de sedimentação (García-Montoya et al, 2015;Chakchouk et al, 2017;Krishnan et al, 2021;Lu et al, 2021;Rajendran et al, 2021). Considerado a remoção completa de cafeína, diclofenaco, 17α-etinilestradiol e acetaminofeno e a remoção parcial de estrona (84%), estriol (81%) e fexofenadina (73%), os procedimentos metodológicos testados devem ser explorados, possivelmente a partir da variação de voltagem do eletrodo para otimizar a remoção desses compostos (Figura 2 e Figura 3).…”

Section: Resultsunclassified

Remoção de produtos farmacêuticos no tratamento avançado de matrizes aquosas: um estudo piloto

Ribas¹,

Santos²,

Costa³

et al. 2022

REGA

A presença de produtos farmacêuticos em matrizes aquosas é cada vez mais estudada no mundo todo. A descarga de efluentes sem nenhum tratamento ou com o tratamento inadequado nos corpos hídricos é uma das principais fontes desses contaminantes no meio ambiente. Neste sentido, o objetivo desta pesquisa foi testar diferentes processos de remoção de micropoluentes, de forma isolada e em diferentes combinações para remoção de produtos farmacêuticos. Foram testados tratamentos com ozonização, ionização, carvão ativado, luz UV e foto-Fenton, demonstrando a eficiência de todos os processos de forma isolada ou em combinação, principalmente na remoção de 17α-etinilestradiol e acetaminofeno. De forma geral, os tratamentos envolvendo oxidação com radical hidroxila e adsorção por carvão ativado obtiveram os melhores resultados de remoção (em torno de 100%), enquanto os demais foram variáveis, dependendo do produto farmacêutico analisado. Os processos de tratamento com ozonização e filtração com carvão ativado podem ser alternativas para o tratamento de efluentes, buscando a minimização dos impactos causados pelos micropoluentes em questão. Ainda, a indicação do uso dos tratamentos de forma isolada ou em diferentes combinações vai depender, além das questões técnicas, de questões econômicas, que não serão discutidas nesse artigo.

J. Electrochem. Sci. Eng.

“…This finding proved that the mode of connection of electrodes toward the electric power source has a high impact on the performance of the EC cell. The impact of the connection mode of the electrodes to the power supply has been investigated by [42][43][44][45][46], as shown in Table 1. These works proved that the type of connection mode to the power supply is extremely important, affecting the performance of the EC reactor for eliminating COD and associated pollutants.…”

Section: Ect Systemmentioning

confidence: 99%

Treatment of oily wastewater by electrocoagulation technology: A general review (2018-2022)

Jasim¹,

AlJaberi²

2022

A huge amount of oily wastewater is discharged annually from several industries like petroleum and petrochemical factories. Scientists and researchers are permanently concentrated on creating conventional technologies or identifying novel treatment options for oily wastewaters, since they need to be treated before being discharged into the soil and aquatic ecosystems. Electrocoagulation technology (ECT) is an electrochemical method employed to remove numerous pollutants from domestic and industrial wastewaters. This paper aims to review the recently published articles from 2018 to 2022 concerned with ECT for oily wastewater remediation. Based on the present review, it is obvious that ECT is strongly dependent on the value of electric current or voltage applied to provide the required amounts of electro-coagulants for efficient remediation, reaction time duration for the generation of electro-coagulants and pollutants elimination, and electrode configuration such as shape, type of metal, and distance between electrodes. Other operating parameters include solution pH (since some pollutants are removed based on their cationic or anionic nature), type of electrolyte which affects the electric conductivity and ohmic drop and stirring speed that may influence the contact among numerous ions throughout the EC reactor. The core findings show that the ECT is highly effective, eco-friendly, and cost-effective in eliminating organic and inorganic pollutants from oily wastewater.