Article
Environmental Sciences
Aditi Trivedi, Swathi Desireddy, Sabumon Pothanamkandathil Chacko
Summary: A mixed microbial consortium adapted from the activated sludge process was capable of simultaneous decolourization and mineralization under denitrifying conditions, even at high methyl orange concentrations. Decolourization process followed first-order kinetics, with better performance observed at alkaline pH levels.
Article
Environmental Sciences
Vu Quang Hieu, Thanh Khoa Phung, Thanh-Quang Nguyen, Afrasyab Khan, Van Dat Doan, Vy Anh Tran, Van Thuan Le
Summary: Photocatalytic activity is an effective solution to address environmental pollution caused by industrial pollutants. The Ti3C2-TiO2 composite, with its unique structure, enhances the efficiency of organic dye degradation and exhibits good stability.
Article
Chemistry, Multidisciplinary
Reem K. Shah
Summary: α-Fe2O3 nanoparticles were successfully fabricated via combustion process using glucose and sucrose as organic fuels. The synthesized products were characterized using various techniques and showed different properties depending on the type of fuel used. The synthesized α-Fe2O3 samples exhibited good photocatalytic activity in the degradation of methyl orange dye under UV irradiation, with the highest degradation efficiency achieved using sucrose as fuel.
ARABIAN JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Piangjai Peerakiatkhajohn, Teera Butburee, Jung-Hoon Sul, Supphasin Thaweesak, Jung-Ho Yun
Summary: The synthesis of Al/ZnO NPs via the sol-gel method with different calcination temperatures and Al dosages showed significant impacts on their structural, morphological, and optical properties. Among them, the ZnO NPs calcined at 200℃ exhibited the highest light absorption property and MO removal efficiency under UV light, while the 5% Al/ZnO NPs demonstrated superior photocatalytic activity under visible light irradiation.
Article
Chemistry, Physical
Luminita Predoana, Elena Madalina Ciobanu, Gabriela Petcu, Silviu Preda, Jeanina Pandele-Cusu, Elena Maria Anghel, Simona Viorica Petrescu, Daniela Cristina Culita, Adriana Baran, Vasile-Adrian Surdu, Bogdan Stefan Vasile, Adelina C. C. Ianculescu
Summary: The tin-doped TiO2 powders were synthesized using sol-gel and microwave-assisted sol-gel methods, with different amounts of SnO2 precursor. The structure and morphology of the annealed nanopowders were characterized using various techniques. The Sn-doped materials showed high photocatalytic efficiency for the removal of methyl orange dye from aqueous solutions, with a degradation efficiency of around 90% after 3 hours of UV light irradiation.
Article
Polymer Science
Asma S. Al-Wasidi, Ibtisam I. S. AlZahrani, Hotoun I. Thawibaraka, Ahmed M. Naglah, Salwa AlReshaidan, Hany M. Youssef
Summary: In this study, copper chromite nanoparticles were synthesized using the hydrothermal method with and without citric acid and tartaric acid as templates. The nanoparticles were characterized using various tools and were found to have different crystallite sizes and optical energy gaps. The synthesized nanoparticles were effective in degrading acid orange 7 dye, with improved performance when citric acid and tartaric acid were added as templates.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2022)
Article
Materials Science, Ceramics
M. Mousavi, T. Ghorbani-Moghadam, A. Kompany
Summary: The La0.7Sr1.3CoO4 Ruddlesden-Popper oxide exhibited good photocatalytic properties under UV irradiation, showing high degradation efficiency for methyl orange dye. The presence of H2O2 further enhanced the catalytic performance, suggesting promising applications for dye degradation.
CERAMICS INTERNATIONAL
(2021)
Article
Environmental Sciences
Lalitha Gnanasekaran, D. Shanmugapriya, V. Sasikala, Sethumathavan Vadivel, Wei-Hsin Chen, M. Arthi, Matias Soto-Moscoso
Summary: Cubic spinel structured CuCo2O4 nanospheres were synthesized using thermal decomposition method. The degradation of organic contaminant methyl orange (MO) under visible light was studied using the synthesized CuO, Co3O4 and CuCo2O4 with different weight ratios. The CuCo2O4 materials exhibited cubic spinel structure as confirmed by X-ray diffraction (XRD) and cubic shaped particles under transmission electron microscopy (TEM). The CuCo2O4 (75:25) sample showed the highest surface area and achieved a degradation efficiency of 85% for MO under visible light.
Article
Biochemistry & Molecular Biology
Nirmal Kumar Shee, Hee-Joon Kim
Summary: The photocatalytic degradation efficiency of acid orange 7 dye was improved by changing the supramolecular arrays and nanostructures of Sn(IV)-porphyrin through axial ligation.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Agricultural Engineering
Ravi Kumar Sonwani, Soumya Pandey, Santosh Kumar Yadav, Balendu Shekhar Giri, Vimal Katiyar, Ram Sharan Singh, Birendra Nath Rai
Summary: An integrated system combining ozonation and biodegradation was developed to treat Acid orange 7 dye, achieving a 98.7% removal efficiency under optimal conditions. Bacillus sp. was found to be the most effective bacteria for removing AO 7. The AndrewsHaldane model accurately predicted the experimental data and bio-kinetic constants.
BIORESOURCE TECHNOLOGY
(2021)
Article
Physics, Condensed Matter
Anoop Singh, Aamir Ahmed, Asha Sharma, Chandan Sharma, Satya Paul, Ajit Khosla, Vinay Gupta, Sandeep Arya
Summary: The study prepared core-shell structured Ag-CdS@Pr-TiO2 nanoparticles and investigated their photocatalytic activity for degrading methyl orange under visible light. Various techniques confirmed the composition, morphology, and optical properties of the synthesized core/shell nanoparticles. The synthesized material showed potential for efficiently degrading methyl orange based on the discoloration of dye within 30 minutes.
PHYSICA B-CONDENSED MATTER
(2021)
Article
Chemistry, Multidisciplinary
N'goran Severin Eroi, Aime Serge Ello, Donourou Diabate, Konan Roger Koffi
Summary: The present study employed the heterogeneous Fenton-like process using tungsten oxide/hydrogen peroxide couple to investigate the kinetic models of methyl orange degradation. The results showed that WO3/H2O2 exhibited high efficiency in the removal of methyl orange and successfully applied the pseudo first-order kinetic model.
JOURNAL OF CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Ruoheng Wang, Yinuo Wang, Nannan Zhang, Shuai Lin, Yingjie He, Yuanjiu Yan, Ke Hu, Huajun Sun, Xiaofang Liu
Summary: By using sonochemical and hydrothermal methods, SbSI nanowires and microrods were synthesized. The SbSI nanowires exhibited better catalytic performance due to their smaller size and larger specific surface area. The combination of piezoelectric effect and photocatalytic performance in SbSI was demonstrated for the first time, showing efficient degradation of methyl orange under visible light and ultrasonic vibration.
CERAMICS INTERNATIONAL
(2022)
Article
Environmental Sciences
Jaspreet Kaur, Gaurav Mudgal, Arvind Negi, Jeewan Tamang, Shambhawi Singh, Gajendra Bahadur Singh, K. Jagadeesh Chandra Bose, Sandip Debnath, Mohammad Ahmad Wadaan, Muhammad Farooq Khan, Janne Ruokolainen, Kavindra Kumar Kesari
Summary: The commercial processing of biomaterials produces wastewater containing azo dyes and hydrolyzed by-products. Current treatment methods lack selectivity and efficiency. Microbial-assisted methods, such as the use of Agrobacterium strain JAS1, have been identified as a potential solution for degrading azo dyes and their by-products.
Article
Polymer Science
A. Fiaz Ahamed, N. Kalaivasan, R. Thangaraj
Summary: In this study, hydroxyapatite (HA) was prepared from fish bone and incorporated with manganese dioxide (MN) and chitosan (CS) to form a composite (HA/MN/CS) with effective behavior in environmental applications. The composite showed enhanced photocatalytic property and was evaluated for the photodegradation of dye. The results demonstrated that the composite had a high degradation rate of 93% for dye AO7 under 365 nm wavelength within 90 minutes, indicating its potential application in wastewater treatment.
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2023)
Article
Environmental Sciences
Wei-Chin Kee, Yee-Shian Wong, Soon-An Ong, Nabilah Aminah Lutpi, Sung-Ting Sam, Audrey Chai, Kim-Mun Eng
Summary: This study investigated the photocatalytic degradation of anaerobically digested vinasse using zinc oxide photocatalyst. The results showed that under optimized operating parameters, the degradation efficiency for organic pollutants and decolorization were high, and toxicity was reduced. The catalyst also exhibited good reusability.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH
(2022)
Article
Environmental Sciences
W-C Kee, Y-S Wong, S-A Ong, N. A. Lutpi, S-T Sam, A. Chai, H-H Ng
Summary: The application of the recirculation process in the biological wastewater treatment process was found to improve the performance of treating wastewater by enhancing biomass retention and mixing intensity. A comparative study between a conventional sequencing batch reactor and a recirculated sequencing batch reactor (R-SBR) was conducted in the treatment of anaerobically digested vinasse. The R-SBR showed higher reduction in chemical oxygen demand and ammonium compared to the conventional sequencing batch reactor, indicating the effectiveness of the mass transfer between activated sludge and substrate in biodegradation. The study also revealed that the feed flow rate played a significant role in achieving effective biodegradation, and the lowest feed flow rate resulted in the highest treatment performance.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Chemical
Shen-Hui Thor, Li-Ngee Ho, Soon-An Ong, Che Zulzikrami Azner Abidin, Cheng-Yong Heah, Noradiba Nordin, Yong-Por Ong, Kea-Lee Yap
Summary: The modification of electrode distance in the PFC-EF system can enhance dye degradation and power output; single cathode PFC-EF system is the most effective for dye degradation, while double cathodes PFC-EF system is optimal for power output.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Audrey Chai, Yee-Shian Wong, Soon-An Ong, Nabilah Aminah Lutpi, Sung-Ting Sam, Wei-Chin Kee
Summary: This research paper presents the thermophilic anaerobic digestion (TAD) of palm oil mill effluent (POME) and compares it with the previously conducted mesophilic anaerobic digestion (MAD). The study finds that TAD exhibits better performance in terms of biogas production, COD reduction efficiency, and microbial characteristics.
Article
Biotechnology & Applied Microbiology
Yen-Yie Lau, Yee-Shian Wong, Soon-An Ong, Nabilah Aminah Lutpi, Sung-Ting Sam, Tjoon-Tow Teng, Kim-Mun Eng
Summary: This study demonstrates the effective treatment and degradation pathway of environmental emerging pollutants through a combined treatment method of thermolysis and coagulation-flocculation. The research provides new insights and valuable guidance for establishing efficient multiple-step wastewater treatments.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2023)
Article
Environmental Sciences
Yong-Por Ong, Li-Ngee Ho, Soon-An Ong, Abdul Haqi Ibrahim, Johar Banjuraizah, Shen-Hui Thor, Sin-Li Lee, Tean-Peng Teoh
Summary: Dual cathode photocatalytic fuel cell (PFC-ACC) and dual photoanodes PFC (PFC-AAC) were established to enhance dye removal and energy recovery efficiencies in single-pair electrode photocatalytic fuel cell (PFC-AC). PFC-AAC exhibited the highest decolorization rate and power output, but the experimental power output was lower than the theoretical power output.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Chemical
Shen-Hui Thor, Li-Ngee Ho, Soon-An Ong, Che Zulzikrami Azner Abidin, Cheng-Yong Heah, Yong-Por Ong, Kea-Lee Yap
Summary: The photo-electro-Fenton (PEF) process was combined with the photocatalytic fuel cell (PFC) to remove Amaranth from water and generate electricity simultaneously. The activation of carbon felt (CF) cathodes using potassium hydroxide (KOH) improved the efficiency of oxygen reduction reaction and decolourisation. The results showed that KOH activated CF cathodes increased the electro-generation of hydrogen peroxide and achieved higher power density compared to pristine CF cathodes.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Sing -Mei Tan, Soon-An Ong, Li-Ngee Ho, Yee-Shian Wong, Che Zulzikrami Azner Abidin, Tean-Peng Teoh, Kea -Lee Yap
Summary: This study investigated the effects of carbon source availability and concentrations, external loads, and cathode conditions on the overall removal rate of ortho-hydroxytoluene and bioelectricity generation characteristics in anti-gravity flow microbial fuel cell through co-metabolism approach. Sodium acetate showed the best performance, along with an optimum influent acetate concentration of 1000 mg L-1 that significantly enhanced system performance. Additionally, external load conditions, aeration rate, and dissolved oxygen concentration all had significant impacts on the system performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Polymer Science
Nor Fauziah Zainudin, Sung Ting Sam, Yee Shian Wong, Hanafi Ismail, Saparu Walli, Kazuki Inoue, Go Kawamura, Wai Kian Tan
Summary: Poly-ferric-silicate-sulphate (PFSS), synthesized using a co-polymerization process, effectively removes diazo Congo red dye at lower coagulant dosages and a wider pH range. LC-MS analysis reveals a novel degradation pathway of the dye by PFSS, with azo bond cleavage confirmed by UV-Vis and FTIR spectra. Characterization using various techniques confirms PFSS as a polycrystalline material suitable for coagulation-flocculation, making it a highly efficient polymeric coagulant for dye removal from wastewater.
Article
Biotechnology & Applied Microbiology
Audrey Chai, Yee-Shian Wong, Soon-An Ong, Nabilah Aminah Lutpi, Sung-Ting Sam, Taweepreda Wirach, Wei-Chin Kee, Hwa-Chuan Khoo
Summary: Anaerobic co-digestion of palm oil mill effluent (POME) and sugarcane vinasse (Vn) with water hyacinth (WH) as co-substrate was conducted in two separate anaerobic bioreactors. The results showed that POME-WH had slightly higher COD and soluble COD reduction compared to Vn-WH. However, VFA reduction was higher in POME-WH. Biogas production was higher in Vn-WH, but methane content was higher in POME-WH. The study also found that growth yield, maximum specific substrate utilization rate, and maximum specific biomass growth rate were higher in POME-WH, while methane yield was higher in Vn-WH.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2023)
Article
Environmental Sciences
Wei-Chin Kee, Yee-Shian Wong, Soon-An Ong, Nabilah Aminah Lutpi, Sung-Ting Sam, Farrah Aini Dahalan, Audrey Chai, Kim-Mun Eng
Summary: This study employed the combined coagulation and sequencing batch biofilm reactor (SBBR) system for the treatment of sugarcane vinasse. It determined the recommended conditions for coagulation and SBBR processes and investigated their effectiveness. The results showed that the coagulation process achieved high COD reduction and decolorization efficiencies, while the SBBR process showed excellent biodegradability. The combined SBBR-CP process demonstrated even greater removal efficiencies compared to the CP-SBBR process.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Wei-Chin Kee, Yee-Shian Wong, Soon-An Ong, Nabilah Aminah Lutpi, Sung-Ting Sam, Farrah Aini Dahalan, Audrey Chai, Kim-Mun Eng
Summary: This study investigated the combined coagulation and sequencing batch biofilm reactor (SBBR) system for the treatment of sugarcane vinasse. The results showed that the combined processes could effectively reduce COD and decolorize the wastewater. The SBBR-CP process achieved higher COD reduction and decolorization efficiencies.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Sing-Mei Tan, Soon-An Ong, Li-Ngee Ho, Yee-Shian Wong, Che Zulzikrami Azner Abidin, Tean-Peng Teoh, Kea-Lee Yap
Summary: This research investigates the effect of biodegradation of binary Acid Orange 7 (AO7) and Reactive Green 19 (RG19) on wastewater treatment and bioelectricity generation using an anti-gravity flow microbial fuel cell (AGF-MFC) system. The study evaluates the influences of initial dye concentration, substrate loading, sulphate concentration, and the application of quinones on the system's performances. The research finds that the decolourization efficiencies of AO7 are higher than RG19 in binary solutions at all tested concentrations. The addition of a higher concentration of RG19 improves the overall performances of the MFC but decreases the power density. Increasing sulphate concentration results in a high decolourization extent but reduces power generation.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Proceedings Paper
Green & Sustainable Science & Technology
Sing-Mei Tan, Soon-An Ong, Yee-Shian Wong, Che Zulzikrami Azner Abidin, Li-Ngee Ho, Norazian Mohamed Noor, Andreea Moncea
Summary: This study investigates the bioremediation of wastewater containing a binary mixture of methyl orange and reactive black 5, as well as the bioelectricity generation in a single chamber up-flow membrane-less microbial fuel cell. The results show that the decolourisation extent of reactive black 5 is higher than that of methyl orange in the binary mixture.
PROCEEDINGS OF THE 3RD INTERNATIONAL CONFERENCE ON GREEN ENVIRONMENTAL ENGINEERING AND TECHNOLOGY (ICONGEET 2021)
(2022)
Proceedings Paper
Green & Sustainable Science & Technology
Tean Peng Teoh, Soon An Ong, Yee Shian Wong, Li Ngee Ho, Norazian Mohamed Noor, Monica Matei
Summary: This study aimed to identify the advantage of integrating microbial fuel cells (MFCs) into constructed wetlands (CWs) by studying the closed and open circuit on wastewater treatment performance and the effect of electrode spacing on electricity generation. The results showed that the closed circuit improved organic matter degradation and that smaller electrode spacing benefited energy production.
PROCEEDINGS OF THE 3RD INTERNATIONAL CONFERENCE ON GREEN ENVIRONMENTAL ENGINEERING AND TECHNOLOGY (ICONGEET 2021)
(2022)
