Article
Engineering, Environmental
Benedict Terkula Iber, Donald Torsabo, Che Engku Noramalina Che Engku Chik, Fachrul Wahab, Siti Rozaimah Sheikh Abdullah, Hassimi Abu Hasan, Nor Azman Kasan
Summary: In this study, dry legs of giant freshwater prawn were chemically processed into chitin and chitosan for use as coagulant in the coagulation/flocculation of real aquaculture wastewater. The optimum operating conditions of chitosan dosage, pH, and settling time for removal of turbidity and colour were established using response surface methodology. The results showed that the smooth and none porous chitosan with high solubility and degree of deacetylation exhibited great potential as a good coagulant.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Polymer Science
Benedict Terkula Iber, Donald Torsabo, Che Engku Noramalina Che Engku Chik, Fachrul Wahab, Siti Rozaimah Sheikh Abdullah, Hassimi Abu Hassan, Nor Azman Kasan
Summary: The major sources of waste from aquaculture operations are fish or shellfish processing and wastewater generation. This study used a chemical method to extract chitin and chitosan from Macrobrachium rosenbergii carapace and applied them for wastewater treatment in shrimp aquaculture. The results showed that the chitosan produced had good quality and could effectively remove turbidity and salinity in the wastewater. The process conditions adopted in this study yielded chitosan of good quality, suitable as a biopolymer coagulant for aquaculture wastewater treatment.
Article
Engineering, Chemical
Roukaya Bouyakhsass, Salah Souabi, Safaa Khattabi Rifi, Soukaina Bouaouda, Abdeslam Taleb, Abdelaziz Madinzi, Tonni Agustiono Kurniawan, Abdelkader Anouzla
Summary: This study focuses on the treatment of landfill leachate using coagulation-flocculation and optimizing the process using central composite design and response surface methodology. The optimal conditions achieved high removal efficiencies for color, polyphenols, and nitrates. The findings offer an efficient and reliable approach to address the challenges of landfill leachate treatment and have important implications for liquid waste management.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Engineering, Multidisciplinary
Anwar Ameen Hezam Saeed, Noorfidza Yub Harun, Mohammed Mahmoud Nasef, Amin Al-Fakih, Aiban Abdulhakim Saeed Ghaleb, Haruna Kolawole Afolabi
Summary: The study evaluated the removal of Cd (II) ions by rice husk biochar as an adsorbent. Activated biochar was prepared using the physicochemical activation method with parameters such as chemical impregnation, pyrolysis temperature, and pyrolysis time investigated. The experimental results showed that factors like pyrolysis temperature and impregnation ratio influenced the biochar yield and its ability to remove cadmium ions.
AIN SHAMS ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Victor R. Moreira, Flavia C. R. Costa, Priscila B. Moser, Roberta N. Guimara, Lucilaine V. S. Santos, Eduardo C. de Paula, Miriam C. S. Amaral
Summary: This paper discusses the use of ultrafiltration membranes aided by in-line coagulation with FeCl3 to improve the resilience of drinking water treatment plants. The results show that the flux decay is lower and the particle size increases when coagulant is considered. The concentrate recirculation does not affect the overall performance of the water treatment plant.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jinkai Xue, Sigrid Peldszus, Michele I. Van Dyke, Peter M. Huck
Summary: Microplastics are a complex issue in water systems due to their diverse physical and chemical characteristics. This study investigated the removal of carboxylated polystyrene microspheres in real surface waters, finding that higher alum doses generally led to better removal of smaller microspheres, but no substantial improvement in removal of particles between 3 and 25 μm. Smaller PS microspheres were more effectively removed in both river and lake water sources, with the water source significantly affecting the removal efficiency.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Hessam Shabanizadeh, Mohsen Taghavijeloudar
Summary: In this study, pomegranate seed powder was used as a natural alternative to chemical flocculants and coagulants in the flocculation-coagulation process for industrial wastewater treatment. The performance of pomegranate seeds in treating paper recycling wastewater was optimized using response surface methodology. The findings revealed that pomegranate seeds have the potential to be a promising and effective coagulant-flocculant agent for industrial wastewater treatment.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Mahdi Ghasemi, Maryam Hasani Zonoozi, Nazila Rezania, Motahareh Saadatpour
Summary: This study applied three artificial intelligence data-driven techniques, including artificial neural network (ANN), support vector regression (SVR), and adaptive neuro-fuzzy inference system (ANFIS), to model and predict the removal of turbidity from water using graphene oxide (GO). The results showed that ANN had the highest estimation accuracy, while SVR had the weakest prediction performance. The study suggests using RSM technique for simulating the process before modeling with ANN.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Alfredo Gonzalez-Perez, Kristofer Hagg, Fabrice Duteil
Summary: Understanding NOM and its impact on water quality is crucial for catchment and water utility managers. NOM affects disinfectant demand, by-product formation, and water treatment processes. This study found that using calcium chloride as a co-coagulant in Al3+ and Fe3+ assisted coagulation processes can reduce the need for primary coagulants, potentially reducing environmental impact and costs.
Review
Engineering, Environmental
Benjamin U. Okoro, Soroosh Sharifi, Mike A. Jesson, John Bridgeman
Summary: This review paper discusses the use of plant-based coagulants to remove NOM in water, examines the effects of various operational parameters on NOM and turbidity removal, and provides suggestions for overcoming commercialization obstacles.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Review
Environmental Sciences
Widad El Bouaidi, Giovanni Libralato, Mountasser Douma, Abdelaziz Ounas, Abdelrani Yaacoubi, Giusy Lofrano, Luisa Albarano, Marco Guida, Mohammed Loudiki
Summary: In recent years, the proliferation of Harmful Cyanobacterial Blooms (CyanoHABs) caused by water eutrophication and climate change has had a significant impact on human health and the environment in relation to water supply. Plant-based coagulants have been studied as an eco-friendly alternative to conventional coagulants in drinking water treatment plants (DWTPs) for the removal of both turbidity and CyanoHABs. While plant-based coagulants have shown efficiency in turbidity removal, their ability to remove cyanobacterial cells is still limited. This paper reviews the application of plant-based coagulants in DWTPs, focusing on turbidity removal, including cyanobacterial cells, and presents their potential use in reducing the harmful effects of cyanobacterial proliferation. The advantages and limitations of green coagulants in DWTPs are discussed, summarizing over 10 years of knowledge.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Fatemeh Tabatabaei, Roya Mafigholami, Hamid Moghimi, Sanaz Khoramipoor
Summary: This study optimized the influential parameters for the removal rate of polyethylene microplastics and compared the effect of different coagulants on the removal rate. The results showed that poly aluminum chloride was more effective as a coagulant, and the addition of ozone gas improved the removal rate.
WATER SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Nazila Rezania, Maryam Hasani Zonoozi, Motahareh Saadatpour
Summary: The study found that graphene oxide is effective in removing turbidity from water, especially when pH is reduced and GO dosage is increased appropriately. The research also revealed the importance of pH and GO dosage on the performance of the purification process.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Ifeoma Maryjane Iloamaeke, Nnaemeka J. Nnaji, Edith Chinyere Okpala, Augustine N. Eboatu, Theresa Uzoma Onuegbu
Summary: The study demonstrated that coagulants derived from Mercenaria mercenaria were effective in purifying paint effluent, with significant removal of color within 20 minutes. Modified coagulants showed improved performance, and a second order kinetic model was found to better fit the data for the coagulation-flocculation process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Chemical
O. D. Onukwuli, P. C. Nnaji, M. C. Menkiti, V. C. Anadebe, E. O. Oke, C. N. Ude, C. J. Ude, N. A. Okafor
Summary: In this study, novel Luffa cylindrica seed extracts were used for coagulation/flocculation treatment of dye-polluted wastewater. Response Surface Methodology and Artificial Neural Network models were proposed to predict the removal rates of color/total suspended particles and chemical oxygen demand using bio-coagulants, with the results showing that the ANN model was preferred for predicting the removal of CSTP and COD from the wastewater.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2021)
Article
Engineering, Chemical
Andrea Coletto, Pietro Poesio
Summary: Experiments and simulations were conducted to study the air volume fraction and hold-up in a bubble channel reactor. A new signal processing method was proposed to avoid the loss of bubble residence time. The results were in agreement with previous studies and a bubble-scale model was developed to explain the relationship between hold-up and air superficial velocity.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2024)
