Article
Engineering, Environmental
A. Sangeetha, R. Gandhimathi, P. V. Nidheesh
Summary: In this study, sulfate radical based advanced oxidation process (SR-AOP) using pyrite (FeS2) as a heterogeneous catalyst was used to treat stabilized/mature landfill leachate (SLL). Optimal conditions for COD and TOC removal were found to be 1000 mg/L FeS2, 1000 mg/L Na2S2O8 at pH 8.8, with removal rates of 78.5% and 74.2%, respectively. The primary oxidative species in the SR-AOP were found to be •OH and SO4•-, with SO4•- playing a major role. Interestingly, no significant change in the catalytic efficiency and characteristic nature of FeS2 was observed even after four sequential treatments.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Siti Nor Farhana Zakaria, Hamidi Abdul Aziz, Maheera Mohamad, Habib Musa Mohamad, Mohd Fauzy Sulaiman
Summary: The performance of ozonation with ZrCl4 and SnCl4 for remediation of stabilized landfill leachate was examined and optimized using response surface methodology. The results showed that ozonation with ZrCl4 achieved better pollutant removal compared to ozonation with SnCl4. At the optimum conditions, both methods achieved removal of 89% to 99.8% of pollutants in the leachate, producing clear effluent.
WATER ENVIRONMENT RESEARCH
(2023)
Article
Engineering, Environmental
Emine Can-Guven, Senem Yazici Guvenc, Gamze Varank
Summary: This study investigated a sequential treatment of landfill leachate including coagulation and binary oxidation processes. The research optimized the chemical coagulation process and examined the factors affecting the binary oxidation process to achieve high removal efficiencies. The results showed that the binary processes were more effective than single processes, reaching significant removal efficiencies under optimal conditions.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
H. A. Aziz, H. R. AlGburi, M. Y. D. Alazaiza, A. F. M. Noor
Summary: The study suggests that sequential treatment involving ozonation and zeolite adsorption can effectively remove color, COD, and NH4-N from stabilized landfill leachate. It also improves biodegradability and increases the BOD5/COD ratio. This combined treatment method helps in removing inorganic and small non-biodegradable organic molecules, reducing COD levels and enhancing treatment efficiency.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Environmental Sciences
Shiqiu Zhang, Kui Zheng, Geng Xu, Bolong Liang, Qin Yin
Summary: This study established a TC removal system involving degradation and adsorption. By adding advanced oxidation agent sodium persulfate (SP) and biochar, the system achieved efficient removal of tetracycline from wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Chemical
Yun Tong Chin, Mohammed J. K. Bashir, Salem S. Abu Amr, Motasem Y. D. Alazaiza
Summary: This study aims to investigate and compare the performance of thermally activated persulfate in treating stabilized leachate. By optimizing experimental operational factors such as S2O82-/COD ratio, temperature, and reaction time, it was found that the efficiency of persulfate oxidation for COD and colour removal significantly improved after thermal activation.
DESALINATION AND WATER TREATMENT
(2022)
Article
Engineering, Environmental
Anthony Heebner, Bassim Abbassi
Summary: This study evaluated a new combined treatment approach by combining ozonation and electrolysis for the mineralization of organic compounds in water. The results showed that the method was most effective for TOC removal in alkaline conditions and significantly enhanced performance compared to ozonation alone in acidic conditions. The initial pH had a more significant effect on TOC removal than current density, but both parameters were relevant. Under optimized conditions, 63% TOC removal was achieved.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Siti Nor Farhana Zakaria, Hamidi Abdul Aziz, Maheera Mohamad
Summary: This research study investigates the effectiveness of zirconium tetrachloride (ZrCl4) and tin tetrachloride (SnCl4) as a coagulant in landfill leachate treatment. The combination treatment of SnCl4 as a coagulant with ozone (O-3) showed the highest removal of color and COD, as well as an improvement in the biodegradability ratio. Integrated treatment is found to be more effective than the coagulation-flocculation process alone in treating stabilized landfill leachate.
WATER ENVIRONMENT RESEARCH
(2022)
Article
Engineering, Environmental
Lianghu Su, Kaiyang Chen, Yiqing Cai, Tianyu Sheng, Sujuan Chen, Huiming Xiang, Yang Deng, Chaoqun Tan
Summary: This study compares and evaluates the UV/PS and heat/PS systems for advanced treatment of biologically pre-treated incineration leachate. The results show that the UV365 nm/PS system has the highest removal efficiency for various pollutants. Moreover, the study highlights the potential interference of PS on COD detection.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Review
Engineering, Environmental
Sabryna I. G. Costa, Fabricio L. Ferreira, Silvio E. Weschenfelder, Joao Vitor R. Fuck, Maria de Fatima R. da Cunha, Belisa A. Marinho, Luciana P. Mazur, Adriano da Silva, Selene M. A. Guelli. U. de Souza, Antonio Augusto U. de Souza
Summary: Despite the development of alternative fuels and energy sources, the world still heavily relies on petroleum production and extraction. This poses a global challenge in treating oilfield produced water (OPW), as an average of 3 barrels of OPW is produced for every barrel of extracted oil. OPW contains various organic compounds, including recalcitrant naphthenic acids (NAs) that are not efficiently removed by conventional treatment methods. Advanced oxidation processes (AOPs), such as ozonation, photocatalysis, photochemical oxidation, and Fenton-based processes, are considered promising alternatives for degrading resistant organic compounds. This review focuses on discussing the treatment of OPW and the degradation of pollutants using different AOPs, addressing the influencing factors and strategies to enhance AOPs efficiency. The findings suggest that individual processes may have limitations, and current research is exploring the use of combined processes.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Engineering, Environmental
Malgorzata Anna Kucharska, SeyedKeyvan Mirehbar, Joanna Agnieszka Ladynska
Summary: This study investigated the efficiency of a novel combined three-step process for the treatment of mature landfill leachate. The results showed high COD removal rates and significant reduction in TOC, absorbance UV254, and color.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Editorial Material
Environmental Sciences
Huijiao Wang, Yujue Wang, Dionysios D. Dionysiou
Summary: This Special Issue includes papers on the mechanistic understanding, development, and implementation of advanced oxidation processes (AOPs) for removing emerging contaminants in water and wastewater treatment. The issue received attention from researchers worldwide and covers various AOPs such as electrochemical, photocatalytic, plasma, and Fenton-related processes. The guest editors are pleased with the innovative and meaningful contributions and hope that this Special Issue will promote the understanding and application of AOPs for emerging contaminant removal.
Review
Engineering, Environmental
Haoyu Luo, Hengyi Fu, Hua Yin, Qintie Lin
Summary: Many researchers have focused on the progress of carbon materials in PS-AOPs due to their advantages, but the specific relationship between the structures of carbon materials and their activities has not been thoroughly reviewed. Furthermore, methods to switch reaction pathways in carbonpersulfate-based AOPs have not been systematically explored, indicating the need for further research in this area.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Biotechnology & Applied Microbiology
Ahmad Razali Ishak, Soo Wei Khor, Sharifah Mohamad, Kheng Soo Tay
Summary: A laboratory-scale automated continuous flow leachate treatment system was developed in this study, combining coagulation-flocculation and UV-activated persulfate advanced oxidation process to efficiently reduce color, chemical oxygen demand, total organic carbon, metals, and toxicity of stabilized landfill leachates (SLL).
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Amin Mojiri, John L. Zhou, Noriatsu Ozaki, Bahareh KarimiDermani, Elham Razmi, Norhafezah Kasmuri
Summary: This study explains the accumulation of different PFAS in water bodies, showing a wide range of PFAS concentrations and varying levels of bioaccumulation in fish and water biota. Recent research has focused on removing PFAS from aqueous solutions, with advanced oxidation processes (AOPs) being a promising technique. Developing novel, efficient, cost-effective, and sustainable AOPs for PFAS degradation in water treatment systems is critical.
Article
Chemistry, Analytical
Afzal Husain Khan, Hamidi Abdul Aziz, Nadeem Ahmad Khan, Sirajuddin Ahmed, Mohd Salim Mehtab, Sergij Vambol, Viola Vambol, Fazlollah Changani, Saiful Islam
Summary: This paper proposes a sustainable and controllable method for hospital wastewater treatment using the photo-Fenton process, MBBR treatment, and ozonation. The optimal operational parameters were evaluated and satisfactory removal rates of pharmaceuticals in hospital wastewater were achieved. The method is suggested to be implemented in two stages for practical application.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
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)
Correction
Engineering, Multidisciplinary
Nor Azliza Akbar, Hamidi Abdul Aziz, Mohd Nordin Adlan, Badrul Nizam Ismail, Nur Shaylinda Mohd Zin
JOURNAL OF FAILURE ANALYSIS AND PREVENTION
(2022)
Review
Green & Sustainable Science & Technology
Mohammed Shadi S. Abujazar, Sakine Ugurlu Karaagac, Salem S. Abu Amr, Motasem Y. D Alazaiza, Mohammed J. K. Bashir
Summary: This study highlights the recent advanced applications of hybrid coagulants in wastewater treatment. The performance of inorganic/inorganic hybrid coagulation demonstrated high removal efficiency compared to organic removal efficiency. The optimum operational conditions for inorganic/organic coagulants at different pH levels lowered the cost for chemicals used for pH adjustment in treating industrial wastewater.
JOURNAL OF CLEANER PRODUCTION
(2022)
Review
Energy & Fuels
Motasem Y. D. Alazaiza, Ahmed Albahnasawi, Tahra Al Maskari, Mohammed Shadi S. Abujazar, Mohammed J. K. Bashir, Dia Eddin Nassani, Salem S. Abu Amr
Summary: The search for alternative energy sources is driven by increasing energy demands and environmental pollution caused by fossil fuel usage. Recent investigations have reported the efficiency of microalgae for biofuel production due to its low production cost, rapid growth rate, and ability to thrive in harsh environments. This review discusses the latest advances in the application of microalgae for biofuel production, including cultivation and harvesting systems, environmental factors affecting cultivation, and lipid extraction and conversion technologies. Furthermore, promising strategies such as mixotrophic cultivation and green harvesting methods using bio-coagulants and flocculants are also presented. Future research should focus on co-cultivation systems, new green harvesting methods, high lipid extraction methods, and optimizing lipid extraction and conversion processes to enhance the sustainability of microalgae application for biofuel production.
Review
Energy & Fuels
Motasem Y. D. Alazaiza, Ahmed Albahnasawi, Murat Eyvaz, Tahra Al Maskari, Dia Eddin Nassani, Salem S. S. Abu Amr, Mohammed Shadi S. Abujazar, Mohammed J. K. Bashir
Summary: Algae can be used to produce valuable compounds and biofuels, and their waste can also be converted into biofuel, biogas, and biochar through different thermochemical processes. Algal biochar carbonized at high temperatures shows excellent performance in applications such as CO2 adsorption and energy storage. Algae biomass pyrolysis at moderate and low temperatures can produce high-quality biochar and coal fuel, respectively. In addition, algae-based biopolymers are considered a potential alternative for establishing a sustainable circular economy globally due to their composting capacity, rapid growth ability, and greenhouse gas emission reduction.
Article
Materials Science, Multidisciplinary
Mohammad S. Manzar, Hamidi Abdul Aziz, Lucas Meili, Ihsanullah Ihsanullah, Puganeshwary Palaniandy, Mamdouh A. Al-Harthi
Summary: The adsorption potential of cellulose nanocrystal-structured MgAl/LDH (CNC/MgAl-LDH) composite for tetracycline (TC) removal was evaluated for the first time. The prepared adsorbent was characterized using SEM, XRD, FTIR, and BET surface area analysis. The CN-MAl-1 composite displayed a high specific surface area of 101.927 m(2) g(-1). The adsorption kinetic data was well fitted by the pseudo-second order kinetic model. The Langmuir isotherm model showed a good fit to the experimental data, with a maximum adsorption capacity of 143.5 and 153.3 mg g(-1) at 298 and 318 K, respectively. Thermodynamic studies indicated that the adsorption of TC was spontaneous, favorable, and endothermic with Delta H-0 = 25.13 kJ mol(-1). After five cycles of regeneration, the TC removal efficiency of the adsorbent remained above 90%. The synthesized adsorbent showed promise and efficiency in the removal of TC from aqueous solutions.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Environmental
Siti Fatihah Ramli, Hamidi Abdul Aziz
Summary: The interaction between the polymer polyacrylamide (PAM) and the tetravalent metal coagulant tin tetrachloride (SnCl4) in the removal of contaminants from landfill leachate was studied. SnCl4 showed better performance as a coagulant compared to PAM, achieving higher reductions in color and suspended solids (SS). The combination of SnCl4 and PAM resulted in significant removal of pollutants.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Chemistry, Analytical
Shefaa Omar Abu Nassar, Mohd Suffian Yusoff, Herni Halim, Nurul Hana Mokhtar Kamal, Mohammed J. K. Bashir, Teh Sabariah Binti Abd Manan, Hamidi Abdul Aziz, Amin Mojiri
Summary: This study evaluated the efficiency of EC combined with US methods for O&G removal in restaurant wastewater, determined the optimum condition for COD degradation using EC treatment, and observed the morphological surface of the aluminium electrode before and after EC treatment. The results showed that the US-EC combined technique is highly recommended for O&G removal from the food industry's wastewater.
Article
Green & Sustainable Science & Technology
Nor Azalina Rosli, Hamidi Abdul Aziz, Ahmad Beng Hong Kueh, Leonard Lik Pueh Lim, Mohd Hafiz Zawawi
Summary: This paper investigates the environmental impact of using compacted sewage sludge:red gypsum (SS:RG) mixture as intermediate landfill cover. Column tests are performed to percolate synthetic leachate through samples with various degrees of compaction. The results show that hydraulic conductivity decreases in three stages, with the first stage attributed to particle rearrangement and hydration of calcium silicate hydrate (CSH). A minimum of 75% compaction is recommended for favorable porosity, hydraulic conductivity, and leachate quality.
Article
Agronomy
Zaber Ahmed, Mohd Suffian Yusoff, Nurul Hana Mokhtar Kamal, Hamidi Abdul Aziz, Maria Roulia
Summary: This study conducted spectroscopic and microscopic analysis of refractory humic substances (HSs) remaining in stabilized landfill leachate and utilized microfiltration and centrifugation processes for their fractionation. The results demonstrated that the isolated humic acid had similar elements and structure, and contributed around 42% of the total COD concentration. Moreover, the isolated humic acid also showed significant reductions in UV absorbance values, COD, and color, indicating its important contribution as a toxic pollutant through aromaticity and conjugated double-bond compounds in the leachate.
Article
Chemistry, Analytical
Motasem Y. D. Alazaiza, Shan He, Dongxiao Su, Salem S. Abu Amr, Pey Yi Toh, Mohammed J. K. Bashir
Summary: The recovery of wastewater is crucial for effective water resource management and addressing regional or seasonal water shortages. Using algae to clean wastewater provides significant benefits, including reducing the formation of hazardous solid sludge and creating valuable algal biomass through nutrient recycling. This study demonstrates the efficacy of microalgal bioremediation in simultaneously treating COD, NH3-N, and orthophosphate in domestic wastewater while enabling biomass production.
Article
Engineering, Environmental
Wen Si Lee, Hamidi Abdul Aziz, Husnul Azan Tajarudin
Summary: In this study, a column study was conducted to observe the elimination of iron (Fe) and manganese (Mn) in groundwater using zeolite immobilized with iron-oxidizing bacteria (IOB). The results showed that the use of zeolite assisted with IOB can achieve a removal rate of 99.34% for Fe and 88.92% for Mn. The presence of IOB enhances the oxidation of Fe, resulting in high removal efficiency.
WATER ENVIRONMENT RESEARCH
(2023)
Article
Engineering, Environmental
Siti Nor Farhana Zakaria, Hamidi Abdul Aziz, Maheera Mohamad, Habib Musa Mohamad, Mohd Fauzy Sulaiman
Summary: The performance of ozonation with ZrCl4 and SnCl4 for remediation of stabilized landfill leachate was examined and optimized using response surface methodology. The results showed that ozonation with ZrCl4 achieved better pollutant removal compared to ozonation with SnCl4. At the optimum conditions, both methods achieved removal of 89% to 99.8% of pollutants in the leachate, producing clear effluent.
WATER ENVIRONMENT RESEARCH
(2023)
