Article
Engineering, Environmental
Senem Yazici Guvenc, Gamze Varank
Summary: This study focuses on inert COD removal from leachate nanofiltration concentrate through Fenton oxidation and optimization of process parameters using response surface methodology. The results indicate that Fenton oxidation is an efficient and economical technology for improving the biological degradability of leachate nanofiltration concentrate and removing resistant organic pollutants.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2021)
Article
Engineering, Environmental
Eva Domingues, Eryk Fernandes, Joao Gomes, Sergio Castro-Silva, Rui C. Martins
Summary: The study focused on treating wastewater from olive oil extraction industry using the Fenton's process integrated with coagulation. Different coagulant loads were studied for optimal conditions, achieving 45% COD removal. This method increased biodegradability to over 40%, allowing for further biological treatment application.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Chemical
Ana Paula Floriano Santos, Fabio Gozzi, Adriana Evaristo de Carvalho, Keila Roberta Ferreira de Oliveira, Anderson Rodrigues Lima Caires, Rodrigo Pereira Cavalcante, Rebeca Fabbro Cunha, Debora Antonio da Silva, Diego Roberto Vieira Guelfi, Lucas de Melo da Silva, Thalita Ferreira da Silva, Gleison Antonio Casagrande, Silvio Cesar de Oliveira, Amilcar Machulek Junior
Summary: This study investigated the use of solar photo-Fenton-like processes to degrade sanitary landfill leachates. The results showed that using Fe3+ as a coagulant combined with the photo-Fenton-like method effectively removed COD and DOC, improving the biodegradability and reducing the toxicity of the effluent. This method holds promising potential as a treatment method for wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Environmental Sciences
Melody Blythe Johnson, Mehrab Mehrvar
Summary: This paper evaluates the feasibility of using the Fenton-like process to pre-treat winery wastewater (WWW) and enhance co-treatment at municipal wastewater treatment plants (WWTPs). The study finds that chemical oxygen demand (COD) and total organic carbon (TOC) removal rates are not accurate indicators of reaction extent, with inert suspended solids (ISS) being the most suitable variable. Despite investigating pre-treatment alternatives, including their negative impacts on simulated effluent quality, challenges associated with co-treating winery wastewater remain.
Article
Environmental Sciences
Chunying Teng, Kanggen Zhou, Lijia Liao, Xuekai Zhang, Kunqi Zhao, Jennefa Wendor Korvayan, Changhong Peng, Wei Chen
Summary: This study proposes a promising alternative method for wastewater treatment, using coordination-driven Cu-based Fenton-like process to effectively degrade organic pollutants. The results showed that under specific conditions, the removal efficiency of humic-acid using Cu-based Fenton-like process can reach 70%. The study also found that the addition of chloride ions can accelerate the reaction process, while bicarbonate ions and phosphate ions have the opposite effect. In addition, increasing the temperature is beneficial for the reaction to proceed.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Wei Zhang, Mengdi Zhang, Jiming Yao, Jiajie Long
Summary: Direct current (DC) electrocoagulation is effective in decolorizing indigo dyeing wastewater but has low chemical oxygen demand (COD) removal rate and high energy consumption due to electrode corrosion. To improve COD removal rate and reduce energy consumption, a peroxi-alternating current (AC) electrocoagulation (EC) system was developed. The study focused on the effects of power type, electrode combination, and process parameters on COD removal rate and decolorization rate, and investigated the COD degradation mechanism. Results showed that AC electrocoagulation enhanced floc adsorption capacity and achieved a COD removal rate of 51.19%. The coupled peroxi-AC electrocoagulation system further removed sulfite and residual dyes, reaching COD removal and decolorization rates of 78.09% and 98.47%, respectively. The system also had significantly lower energy consumption compared to DC electrocoagulation, with a reduction of 70%. Overall, the peroxi-AC EC system is an effective method for reducing COD concentration in indigo dyeing wastewater.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Engineering, Chemical
Marwa M. Jiad, Ali H. Abbar
Summary: In this study, a new hybrid system combining photo-catalysis and electroFenton processes was used to treat petroleum refinery wastewater. The system's performance was optimized using response surface methodology, and the results showed that the hybrid process achieved a higher removal efficiency of chemical oxygen demand compared to the individual photo-catalysis process, while reducing the total electrical energy consumption. The ANOVA results indicated that the current density had the most significant effect on the removal efficiency.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Chemical
Perumal Asaithambi, Mamuye Busier Yesuf, Rajendran Govindarajan, Selvakumar Periyasamy, Subramaniapillai Niju, T. Pandiyarajan, Abudukeremu Kadier, D. Duc Nguyen, Esayas Alemayehu
Summary: In this study, various electrochemical and advanced oxidation processes (AOPs) were compared for their ability to remove color and COD from distillery industrial wastewater (DIW) and their impact on power consumption. The hybrid US + ACEF process was found to achieve complete color and COD removal with lower power consumption compared to other processes. The effects of different operational parameters on COD removal efficiency and power consumption were also investigated. The US + ACEF method is the most suitable for efficiently removing pollutants from wastewater and industrial effluent.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Moeen Gholami, Abbas Shomali, Behrooz Abbasi Souraki, Alireza Pendashteh
Summary: A kinetic model was developed to predict COD removal efficiency of Fenton process for pulp and paper mill wastewater. Experimental results and numerical simulations showed that the model had great potential in predicting the efficiency. The study highlighted the importance of parameters such as pH, H2O2, and Fe(II) in the Fenton process and their effects on COD removal efficiency and Fe(III) accumulation.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Environmental Sciences
Laxiang Yang, Jieqiong Zhou, Yuxin Feng
Summary: The VUV/UV process effectively removes organic fluorine compounds from fluoride-containing pharmaceutical wastewater, with degradation mainly attributed to the attack of the fluorine atom by HO· generated from VUV photolysis. The removal efficiency of COD and the release ratio of F- in real pharmaceutical wastewater vary significantly under different pH and dissolved oxygen saturation conditions. The biodegradability index of pharmaceutical wastewater is significantly improved after VUV/UV treatment.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Review
Engineering, Environmental
M. D. N. Ramos, C. S. Santana, C. C. V. Velloso, A. H. M. da Silva, F. Magalhaes, A. Aguiar
Summary: Effluents from the textile industry pose environmental concerns due to high volumes, organic matter, and toxic substances. Fenton oxidation processes, especially photoFenton, show promise as efficient alternatives for treatment of textile effluents, reducing organic pollutants and color effectively.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Abdulla Y. Ghjair, Ali H. Abbar
Summary: This study investigates the feasibility of using electro-Fenton (EF) and sono-electro-Fenton (SEF) processes for removing COD from hospital wastewater. The optimal conditions for EF were found to be a current density of 19.293 mA/cm2, an H2O2/COD ratio of 1.4, and a time duration of 46.67 min, resulting in 96.27% COD removal. For SEF, the best conditions were a current density of 10 mA/cm2, an H2O2/COD ratio of 0.2, and a time duration of 46.67 min, leading to 88.31% COD removal.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Xuemei Wang, Jinyao Ma, Qi Hu, Xiaohong Hou
Summary: The use of herbal medicine has a long history, and one of the most commonly used herbs is Radix Aconiti. However, Radix Aconiti contains highly toxic alkaloids, therefore, it needs to be processed before use. The processing wastewater from Radix Aconiti is highly toxic due to the presence of alkaloids, posing a significant threat to human and environmental safety. This study demonstrates that the Fenton method is effective in removing toxic substances from Radix Aconiti processing wastewater, and AOP shows great potential in treating toxic herbal wastewater.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Bulent Sari, Selman Turkes, Hakan Guney, Olcayto Keskinkan
Summary: The Fenton and photo-Fenton oxidation processes are critical in treating textile wastewater directly. This study compares the efficiency of FOP and PFOP in a textile industry setting, with optimal results achieved at pH 3. PFOP is shown to meet environmental discharge standards of many countries, particularly in Turkey.
WATER ENVIRONMENT RESEARCH
(2022)
Article
Environmental Sciences
Poornima Menon, T. S. Anantha Singh, Nibedita Pani, P. Nidheesh
Summary: The study focuses on utilizing combined Electro-Fenton and sonication for treating wastewater from dye intermediate manufacturing. Under optimal conditions, the removal efficiency for ammoniacal nitrogen and COD were 59.4% and 79.2% respectively, which was enhanced to 65.5% and 85.4% after sonication was applied. Combining EF process with sonication provides a feasible and scientific approach to achieve efficient removal of ammoniacal nitrogen and COD.
Article
Green & Sustainable Science & Technology
Kati Klein, Arthur Kivi, Niina Dulova, Ivar Zekker, Erik Moelder, Toomas Tenno, Marina Trapido, Taavo Tenno
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY
(2017)
Article
Environmental Sciences
Eneliis Kattel, Balpreet Kaur, Marina Trapido, Niina Dulova
ENVIRONMENTAL TECHNOLOGY
(2020)
Article
Engineering, Environmental
J. Bolobajev, M. Kasle, K. Kreek, M. Kulp, M. Koel, A. Goib
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Engineering, Environmental
Niina Dulova, Eneliis Kattel, Balpreet Kaur, Marina Trapido
OZONE-SCIENCE & ENGINEERING
(2020)
Article
Environmental Sciences
Balpreet Kaur, Liina Kuntus, Priit Tikker, Eneliis Kattel, Marina Trapido, Niina Dulova
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Environmental Sciences
Balpreet Kaur, Eneliis Kattel, Niina Dulova
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Environmental Sciences
Balpreet Kaur, Niina Dulova
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2020)
Article
Environmental Sciences
Sawaira Adil, Bareera Maryam, Eun-Ju Kim, Niina Dulova
ENVIRONMENTAL RESEARCH
(2020)
Article
Engineering, Environmental
Priit Tikker, Niina Dulova, Iakov Kornev, Sergei Preis
Summary: Experimental research found that in acidic media, the best oxidation effect of oxalate was achieved at a molar ratio of 1:0.5 between oxalate and persulfate when using gas-phase pulsed corona discharge (PCD). However, the synergism of PCD/PS combination decreased with increasing initial pH of the treated solution.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Vladimir Derevshchikov, Niina Dulova, Sergei Preis
Summary: The study experimentally investigated the energy-efficient gas-phase pulsed corona discharge for the oxidation of aqueous pharmaceuticals, showing promising results for ibuprofen, diclofenac, metformin, and tramadol. The oxidation energy efficiency was found to be influenced by alkaline pH, starting concentrations, and the molecular structure and hydrophobicity of the medications. The gas-phase pulsed corona discharge method demonstrated higher energy yields compared to other advanced oxidation processes (AOPs).
JOURNAL OF ELECTROSTATICS
(2021)
Article
Engineering, Environmental
Dmitri Nikitin, Balpreet Kaur, Sergei Preis, Niina Dulova
Summary: The degradation and mineralization of antidiabetic metformin (MTF) and opioid tramadol (TMD) in water were investigated using UV photolytic oxidation and pulsed corona discharge (PCD) combined with extrinsic persulfate (PS) systems. The results showed that the UV/PS combination had considerable effect in removing MTF and TMD, while the PCD/PS oxidation had a synergy effect on MTF degradation. Addition of PS to PCD treatment had no effect on TMD oxidation. The non-assisted PCD treatment showed the highest energy efficiency in MTF and TMD degradation.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2022)
Article
Engineering, Environmental
Liina Onga, Eneliis Kattel-Salusoo, Sergei Preis, Niina Dulova
Summary: The oxidation of anti-inflammatory dexamethasone in water using gas-phase pulsed corona discharge (PCD) with the addition of extrinsic oxidants was experimentally studied. The results showed that the degradation of dexamethasone was faster and more efficient in acidic media, and the combination of PCD and peroxydisulfate showed the highest removal efficiency. In groundwater matrix, the PCD/peroxydisulfate and PCD/hydrogen peroxide combinations demonstrated considerably faster degradation and mineralization of dexamethasone at higher efficiency.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Deniss Klauson, Natalja Romero Sarcos, Marina Krichevskaya, Eneliis Kattel, Niina Dulova, Tatjana Dedova, Marina Trapido
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2019)
Article
Engineering, Environmental
Niina Dulova, Eneliis Kattel, Marina Trapido
CHEMICAL ENGINEERING JOURNAL
(2017)
Article
Engineering, Environmental
Marina Trapido, Taavo Tenno, Anna Goi, Niina Dulova, Eneliis Kattel, Deniss Klauson, Kati Klein, Toomas Tenno, Marika Viisimaa
JOURNAL OF WATER PROCESS ENGINEERING
(2017)
