Article
Water Resources
Sharmin Sultana, Boloram Karmaker, A. S. M. Saifullah, Md Galal Uddin, Md Moniruzzaman
Summary: This study aims to identify alternative components that can be used as natural coagulants by using different regional clays as coagulants. The removal efficiency of physical properties, chemical properties, and heavy metals from wastewater was investigated. The results showed that the coastal clay of Patuakhali can be an economically viable coagulant.
APPLIED WATER SCIENCE
(2022)
Article
Multidisciplinary Sciences
Wendesen Mekonin Desta, Million Ebba Bote
Summary: The study confirms the efficiency of using powdered Moringa oleifera seeds for removing impurities in wastewater treatment. The optimal dosage is 0.4 g/500 ml, with maximum reductions in turbidity, color, and COD achieved. The study also highlights the importance of using RSM to optimize the coagulation process.
Article
Environmental Sciences
Siphesihle Mangena Khumalo, Babatunde Femi Bakare, Emmanuel Kweinor Tetteh, Sudesh Rathilal
Summary: This study optimized the parameters for the treatment of brewery wastewater using central composite design and response surface methodology. The experimental results showed that chitosan had a high efficiency in removing turbidity, total organic carbon, and orthophosphates in brewery wastewater under the optimal conditions.
Article
Engineering, Environmental
Jamila El Gaayda, Fatima Ezzahra Titchou, Issam Barra, Ilham Karmal, Hanane Afanga, Hicham Zazou, Pow-Seng Yap, Zurina Zainal Abidin, Mohamed Hamdani, Rachid Ait Akbour
Summary: This study evaluated the efficiency of Moringa oleifera seed powder (MOSP) as a natural coagulant for removing turbidity and anionic dye from synthetic wastewater. The results showed that MOSP had a high removal efficiency for both turbidity and dye, and could be considered as an alternative to chemical coagulants due to its environmental friendliness.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
C. E. N. C. E. Chik, S. B. Kurniawan, Z. N. A. Shukri, I. B. Terkula, F. Wahab, A. Endut, F. Lananan, H. A. Hasan, S. R. S. Abdullah, N. A. Kasan
Summary: This study investigates the potential of chitosan extracted from Pacific whiteleg shrimp shell as a biocoagulant for treating aquaculture wastewater. The results demonstrate that chitosan is effective in removing turbidity and offers a promising alternative to chemical coagulants in the industry.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Environmental Sciences
Wen Wang, Liqiang Qi, Pan Zhang, Jichen Luo, Jingxin Li
Summary: This study reports the preparation of magnetic coagulants (Fe-AFA, Fe-BFA) using acid-modified and base-modified fly ash as adsorbents for chemical oxygen demand (COD) in desulfurization wastewater. The adsorption kinetics and mechanism were investigated using various characterization techniques. Fe-AFA exhibited the best COD adsorption performance and superparamagnetism. The quasi-second-order kinetic and Langmuir equation were found to describe the COD coagulation process. The reusability of magnetic coagulants was also studied.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Ayub Md Som, Aina Afiqah Ramlee, Siti Wahidah Puasa, Hairul Amani Abdul Hamid
Summary: The application of plant-based coagulants in industrial wastewater treatment has gained attention due to their potential advantages. This study focused on Hylocereus undatus foliage as a plant-based coagulant and aimed to evaluate its performance in treating different types of wastewater under different operating conditions using optimization techniques. The results showed that the optimum conditions for paint wastewater treatment were achieved at pH 5, a coagulant dosage of 300 mg/L, rapid mixing speed of 120 rpm, and temperature of 30 degrees C. The removal efficiencies of turbidity, COD, and SS were found to be 62.81%, 59.57%, and 57.23%, respectively.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Multidisciplinary Sciences
Amirah Ya'acob, Norazwina Zainol, Nor Hazwani Aziz
Summary: This study identified the optimal operating conditions for the removal of COD and ammonia-N in municipal wastewater using acclimatized mixed culture (AMC), including factors such as the ratio of synthetic wastewater to AMC, agitation speed, presence of support media, and hydraulic retention time.
Article
Environmental Sciences
Abideen Idowu Adeogun, P. B. Bhagawati, C. B. Shivayogimath
Summary: Response surface methodology and artificial neural network were utilized to model the electrocoagulation process for removing pollutants from pulp processing wastewater. The study found that under optimal conditions, removal efficiencies for COD, TDS, and Turbidity were 76.4%, 57.0%, and 97.13% respectively, with potential for sludge utilization as adsorbent and metal recovery.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Samaneh Taghilou, Mazyar Peyda, Mohammad Reza Mehrasbi
Summary: The study demonstrates that Azolla can remove phosphorus even in nitrogen deficiency. The removal efficiency shows an upward trend as Azolla growth increases, indicating a significant impact on removing nitrogen, phosphorus, and COD from aqueous solution.
JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING
(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
Green & Sustainable Science & Technology
Mai Sheta, Basant Yousry, Ahmed Zattot, Nahla A. Taha
Summary: The study successfully adsorbed chromium ions from industrial wastewater using different types of chitosan, achieving a removal rate of 99%. The results indicate that both natural and commercial chitosan have good adsorption effects on Cr+6, fitting well with different adsorption isotherm models.
Article
Multidisciplinary Sciences
Million Ebba, Perumal Asaithambi, Esayas Alemayehu
Summary: Electrocoagulation (EC) is a process that uses sacrificial electrodes to supply electric current for the removal of pollutants from wastewater. This study experimentally investigated the impact of various factors on the efficiency of pollutant removal and energy consumption in the EC process, and optimized the operational parameters using mathematical and statistical methods.
Article
Engineering, Environmental
Hichem Tahraoui, Abd-Elmouneim Belhadj, Zakaria Triki, Nihel Rayen Boudellal, Sarah Seder, Abdeltif Amrane, Jie Zhang, Nassim Moula, Amina Tifoura, Radhia Ferhat, Abla Bousselma, Nadia Mihoubi
Summary: In this study, wastewater from the Antibiotical-Saidal pharmaceutical plant was pretreated by coagulation-flocculation using copper sulfate (CuSO4), iron chloride (FeCl3), and a mixture of the two salts. Response surface methodology (RSM) and Gaussian process regression coupled with the dragonfly optimization algorithm (GPR-DA) were employed to optimize the treatment process and predict the reduction rates of dissolved organic carbon (DOC), absorbance at 254 nm (UV 254), and turbidity. The results showed that the mixed coagulant (CuSO4 + FeCl3) achieved superior treatment efficiency compared to using CuSO4 or FeCl3 alone.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Xue Zhang, Huijuan Han, Hongxing Chai, Penghao Gao, Wei Wu, Mengzhao Li, Qingxin Lv, Xianglin Guo, Qingmei Meng, Xinpeng Liu, Peiling Gao
Summary: Wastewater treatment is achieved through the regeneration of resources and energy using pre-treatment technologies. Coagulation pre-treatment of landfill leachate was performed in this study using polymeric iron sulfate (PFS) as a coagulant. The effects of PFS dosing, initial pH, and PAM dosing on the removal of COD, TP, and UV254 from the leachate were evaluated. Response surface methodology (RSM) was used to assess the individual and interactive effects of parameters on COD%, TP%, and UV254%. The optimization results showed significant removal of contaminants in the leachate, with COD%, TP%, and UV254% reaching their maximum values at specific conditions.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Energy & Fuels
Ashfaq Ahmad, Fawzi Banat, Hanifa Taher
Summary: This study investigated the effects of pH, total solids (TS) content, and enzymatic pretreatment on lactic acid (LA) production from food waste with indigenous microbiota. The results showed that increasing TS content and enzymatic pretreatment can enhance LA production. The production of LA can be increased 3-fold under the optimal conditions. The high selectivity of LA makes downstream processing economically feasible.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Energy & Fuels
Muhammad Tahir Ashraf, Juan-Rodrigo Bastidas-Oyanedel, Ashfaq Ahmad, Abdul Hai, Hanifa Taher AlBlooshi, Jens Ejbye Schmidt, Fawzi Banat
Summary: This study aims to optimize the operational parameters and compare the cyclic and batch modes for carboxylic acid production from food waste. The results show that the use of the cyclic mode significantly increases carboxylic acid yield.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Polymer Science
Siti Hajar Mohamed, Md. Sohrab Hossain, Mohamad Haafiz Mohamad Kassim, Mardiana Idayu Ahmad, Fatehah Mohd Omar, Venugopal Balakrishnan, Muzafar Zulkifli, Ahmad Naim Ahmad Yahaya
Summary: Cellulose nanocrystals (CNCs) were successfully isolated from waste cotton cloths, showing excellent morphological, chemical, thermal, and physical properties, indicating the great potential of recycling waste cotton cloths.
Article
Chemistry, Analytical
Siti Fatihah Ramli, Hamidi Abdul Aziz, Fatehah Mohd Omar, Mohd Suffian Yusoff, Herni Halim, Mohamad Anuar Kamaruddin, Kamar Shah Ariffin
Summary: This study evaluated the effectiveness of SnCl4 as a positively charged coagulant in treating concentrated colour and suspended solids from old landfill leachate in Malaysia. The results showed that the addition of SnCl4 increased the leachate surface charge, which promoted the collision of particles and resulted in a significant reduction in colour and suspended solids at pH 8.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Sharifah Farah Fariza Syed Zainal, Hamidi Abdul Aziz, Fatehah Mohd Omar, Motasem Y. D. Alazaiza
Summary: This study investigated the effectiveness of using Tin (IV) chloride and Jatropha curcas seed in the coagulation-flocculation treatment for removal of suspended solids from landfill leachate. The results showed that with an optimum concentration of 8.5 g/L of SnCl4 and 0.9 g/L of JC seed, almost complete reduction of suspended solids was achieved. The addition of JC seed improved the sludge properties and facilitated effective dewatering. The study confirmed that using SnCl4 and Jatropha curcas seed in the coagulation-flocculation treatment could be a powerful option for landfill leachate treatment.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Plant Sciences
Ashfaq Ahmad, Fawzi Banat, Habiba Alsafar, Shadi W. Hasan
Summary: Microalgae have gained attention for their ability to photosynthesize natural chemicals and produce bioproducts with industrial and biomedical implications. However, low yields and high production costs limit their commercial potential. Genetic and metabolic engineering can improve microalgae's production efficiency and properties for various applications.
PHYTOCHEMISTRY REVIEWS
(2023)
Review
Environmental Sciences
Ashfaq Ahmad, Fawzi Banat, Habiba Alsafar, Shadi W. Hasan
Summary: As the global population continues to grow, the importance of wastewater management and treatment is increasing. Using algae for wastewater treatment and biofuel production is an economically viable approach.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Sharifah Farah Fariza Syed Zainal, Hamidi Abdul Aziz, Siti Fatihah Ramli, Fatehah Mohd Omar
Summary: This study evaluated the toxicity levels of coagulation and flocculation process on landfill leachate using acute toxicity tests. The use of JC seed as a flocculant reduced the dosage of SnCl4, resulting in significant removal of suspended solids, color, and chemical oxygen demand. The toxicity test showed reduced mortality rates for tilapia fish in treated leachate, indicating it is safe for discharge at appropriate dilution concentrations.
WATER ENVIRONMENT RESEARCH
(2022)
Article
Water Resources
Mohd Talha Anees, Ahmad Farid Bin Abu Bakar, Mohammad Muqtada Ali Khan, Muhammad Syakir, K. Abdullah, Mohd Nawawi Mohd Nordin, Kamal Abdelrahman, Ahmed M. Eldosouky, Peter Andras, Nasehir Khan Bin E. M. Yahaya, Zubaidi Johar, Fatehah Mohd Omar, Mohd Omar Abdul Kadir
Summary: Topographic LIDAR can accurately estimate the water level, flow area, and floodplain depth of river cross-sections. The use of a hydrologic engineering model helps to simulate and validate these estimates.
HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES
(2022)
Article
Environmental Sciences
Siti Fatihah Ramli, Hamidi Abdul Aziz, Fatehah Mohd Omar, Mohd Suffian Yusoff, Herni Halim, Mohamad Anuar Kamaruddin, Kamar Shah Ariffin, Yung-Tse Hung
Summary: This study evaluated the application of tin tetrachloride (SnCl4) as the main coagulant and rubber seed (RS) as the natural coagulant aid in treating landfill leachate. The results showed that SnCl4 was effective in removing suspended solids and color, while RS acted as a coagulant aid to enhance the performance of SnCl4.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Review
Biotechnology & Applied Microbiology
Ashfaq Ahmad, Shadi W. Hassan, Fawzi Banat
Summary: Sustainable management of natural resources is critical to food security, particularly for the expansion of the shrimp feed and fishery sector. Microalgal biomass has the potential to serve as an environmentally friendly and nutrient-rich alternative to fish feed ingredients. Fish and microalgae have similar nutritional profiles, and highly digestible feed can reduce production costs, feed waste, and the risk of pollution.
Review
Energy & Fuels
Ashfaq Ahmad, Fawzi Banat, Habiba Alsafar, Shadi W. Hasan
Summary: PLA, a biodegradable biopolymer produced from fermentative lactic acid, has the potential to replace petroleum-based plastics. It finds applications in the biomedical field and disposable packaging materials. However, PLA is comparatively expensive and has inferior properties to petroleum-based plastics, requiring scientific and technical efforts for improvement.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Environmental Sciences
Mohd Talha Anees, Mohammad Muqtada Ali Khan, Mohd Omar Abdul Kadir, Kamal Abdelrahman, Ahmed M. Eldosouky, Peter Andras, Nasehir Khan Bin E. M. Yahaya, Zubaidi Johar, Mohammed S. Fnais, Fatehah Mohd Omar
Summary: The study utilized spatio-temporal water quality modeling to assess the environmental impact of mining activities in Gua Musang, Malaysia. It found that mining activities resulted in high water pollution during the wet season, but no significant differences were observed during the dry season. Implementing mitigation measures improved water quality.
Article
Environmental Sciences
Md Sohrab Hossain, Shabib Al Rashdi, Yaman Hamed, Adel Al-Gheethi, Fatehah Mohd Omar, Muzafar Zulkifli, Ahmad Naim Ahmad Yahaya
Summary: In this study, the post-treatment of biologically treated palm oil mill effluent (POME) was conducted using ferrous sulfate monohydrate as a coagulant. The results showed that the use of ferrous sulfate monohydrate effectively reduced the pollutant concentration in POME, achieving elimination rates of biochemical oxygen demand (BOD), suspended solids (SS), and chemical oxygen demand (COD) higher than the recommended discharge limits. The optimized experimental conditions and the analysis of kinetic and thermodynamic properties indicated that ferrous sulfate monohydrate effectively removed colloidal and suspended particles from POME.
Article
Engineering, Environmental
Abdubaki Mohamed Hussen Shadi, Mohammad Anuar Kamaruddin, Noorzalila Muhammad Niza, Fatehah Mohd Omar, Md Sohrab Hossain
Summary: In this study, Fe2O3 nanoparticles isolated from iron ore were used as adsorbents to effectively remove COD, color, and NH3-N from landfill leachate. The Langmuir isotherm model was found to be the most effective for adsorption, and the pseudo-second-order kinetic model fitted well with the elimination process. Thermodynamic analysis indicated that the removal of pollutants from landfill leachate using Fe2O3 nanoparticles occurred spontaneously and endothermically.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
