Article
Biotechnology & Applied Microbiology
Seyed Hassan Ahmadi, Tayebeh Tabatabaie, Bahman Ramavandi, Seyed Enayat Hashemi
Summary: This study investigated the enzymatic biodegradation of amoxicillin in wastewater. The results demonstrated that under appropriate conditions, a high removal rate of amoxicillin can be achieved.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Article
Biotechnology & Applied Microbiology
Ali Assadi, Roya Alimoradzadeh, Hossein Movahedyan, Mohammad Mehdi Amin
Summary: This study investigated the microbial and biodegradation kinetics of acclimated-mixed sludge to 4-chlorophenol in an aerobic sequencing batch reactor. The biodegradation kinetics were predicted accurately using the Haldane formulae. However, pure strains isolated from mixed sludge did not show higher 4-CP-removal efficiency due to the presence of an intermediate meta-cleavage product.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Alejandro Reyes-Cervantes, Diana Laura Robles-Morales, Alejandro Tellez-Jurado, Sergio Huerta-Ochoa, Angelica Jimenez-Gonzalez, Sergio Alejandro Medina-Moreno
Summary: The study evaluated and characterized the biodegradation of the herbicide diuron in its commercial form above saturation concentration by acclimatized Lysinibacillus fusiformis. The results showed improved capacity of L. fusiformis to remove diuron at high concentrations, indicating potential for bioremediation of diuron-contaminated sites.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
J. Terreros-Mecalco, O. Guzman-Lopez, L. Garcia-Solorio
Summary: The study investigated the biodegradation of phenol in industrial effluent using a new configuration UASB reactor. Varying the organic load rate, dissolved oxygen levels, and hydraulic retention time, it was found that lower organic load resulted in higher COD removal and phenol biodegradation rates. Increasing organic load led to a decrease in degradation efficiency.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Anja Vehar, Ana Kovacic, Nadja Hvala, David Skufca, Marjetka Levstek, Marjetka Strazar, Andreja Zgajnar Gotvajn, Ester Heath
Summary: This study analyzed 16 bisphenols in wastewater and sludge samples from a municipal wastewater treatment plant. The results showed that the concentrations of bisphenols in sludge were significant and their environmental emissions should be monitored.
Article
Engineering, Chemical
T. Akshaya Vidhya, K. Veena Gayathri, P. Senthil Kumar, Gayathri Rangasamy, Tasneem M. Kathawala
Summary: A laboratory-scale aerobic sequential batch reactor (SBR) was used to analyze the degradation of mixed reactive azo dyes. The results showed that the removal of chemical oxygen demand (COD) and biochemical oxygen demand (BOD) varied with dye concentration. The biosorption experiment and phytotoxicity test confirmed the efficacy of the treatment method.
INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING
(2022)
Article
Biochemistry & Molecular Biology
Nur Sakinah Ahmad Yasmin, Norhaliza Abdul Wahab, Fatimah Sham Ismail, Mu'azu Jibrin Musa, Mohd Hakim Ab Halim, Aznah Nor Anuar
Summary: The SVR models aim to predict the concentration of chemical oxygen demand in sequential batch reactors under high temperatures using the complex internal interaction between sludge characteristics and influent. The models were developed using a radial basis function algorithm with selected kernel parameters and optimized using particle swarm optimization and genetic algorithm. The results demonstrate the potential of SVR for simulating the complex aerobic granulation process.
Article
Environmental Sciences
A. Albahnasawi, H. Agir, M. F. Cicerali, N. Ozdogan, E. Gurbulak, M. Yildirim, M. Eyvaz, E. Yuksel
Summary: This article examines the performance of an aerobic sequential batch reactor in treating real textile wastewater with different hydraulic retention times. The results show that increasing the hydraulic retention time can effectively improve the removal efficiency of chemical oxygen demand and color. Chromatographic and GC-MS/MS analysis indicate that aromatic amines and organic compounds can be biodegraded under aerobic conditions, and the aerobic sequential batch reactor can effectively remove organic compounds from textile wastewater.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Hossam A. Abdelaziz, Moharram Fouad, Mohamed Mossad
Summary: The upgraded SBR, with fixed biofilm carriers, showed higher resistance to phenol compounds, improved sludge settling properties, and reduced excess sludge compared to the conventional SBR. It also achieved higher phenol removal efficiency and reduced aeration steps. Additionally, the upgraded SBR had a higher operational stability with an increased number of cycles per day.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Biotechnology & Applied Microbiology
Alpaslan Ekdal, Didem Okutman Tas, Gulsum Emel Zengin, Irmak Bati Onay, Tugba Olmez Hanci, Derin Orhon, Emine Cokgor
Summary: This study evaluated the co-metabolism characteristics of nonylphenol polyethoxylate (NPEO) in an activated sludge system. It was found that the biodegradation of NPEO was influenced by the major by-product nonylphenol diethoxylate (NP2EO). However, NPEO did not have an inhibitory effect on the microbial culture in terms of heterotrophic and autotrophic activities.
Article
Environmental Sciences
Jia Chen, Siqiao Yang, Ke Zhang, Wei Chen, You Mo, Lin Li
Summary: The bacterium ASLT-13 was identified as Pseudomonas amygdali and shown to completely mineralize DEHP through a specific metabolic pathway. Immobilization technology has potential application in enhancing DEHP removal efficiency.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Environmental Sciences
Rui Yang, Lin-jiang Yuan, Ru Wang, Zhi-xian He, Lin Lei, Yan-chen Ma
Summary: This study investigates the production process of nitrous oxide (N2O) in the aerobic zone of nitrogen bio-removal process by measuring the activities of two key denitrifying enzymes. The results demonstrate that most of the N2O released and produced come from autotrophic denitrification, while heterotrophic denitrification acts as an N2O consumer. The study suggests that reducing autotrophic denitrification is the best way to reduce N2O production in the aerobic phase.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Agricultural Engineering
Susan N. James, Arya Vijayanandan
Summary: An anoxic-aerobic-anoxic process was established in a sequencing batch reactor to simultaneously remove organic carbon and nitrogen from wastewater. The study found that the optimum conditions for the process were achieved with a dissolved oxygen level of 1.5 mg/L and 1 hour pre-anoxic and post-anoxic periods. Under these conditions, the removal efficiencies of TOC, NH4+-N, and TN were 98.76%, 98.52%, and 88.23% respectively. Breakpoints in the pH, DO, and ORP curves provided insights into the biochemical reactions occurring in the reactor. Inhibition studies revealed that nitrogen removal pathways such as heterotrophic nitrification or direct conversion contributed to the removal of 27.69% of NH4+-N, while aerobic denitrification accounted for the removal of 20.55% of TN. Microbial community analysis confirmed the presence of heterotrophic nitrifiers and aerobic denitrifiers. The study emphasized the benefits of the varied redox conditions provided by limited aeration for nitrogen removal, leading to reduced energy usage and operating costs.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Tianwen Song, Shanshan Li, Zichao Yin, Mutai Bao, Jinren Lu, Yang Li
Summary: This study investigates the treatment of HPAM-containing wastewater using an ozonic-anaerobic-aerobic multistage treatment process. The results show that the process has ideal degradation performance and key microorganisms essential for the treatment.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Sayeh Parandoush, Nader Mokhtarani
Summary: The effects of ultrasonic waves and ozonation on the reduction of produced sludge in the SBR system were investigated. The results showed that the integration of ozone with a specific level of ultrasonic energy can significantly decrease sludge production, with high removal efficiencies of COD, total nitrogen, and total phosphorus.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Physics, Condensed Matter
Arham S. Ahmed, Jhalak Gupta, Abdul Hakeem Anwer, Mohammad Zain Khan
Summary: In this study, a facile sol-gel ultrasonication route was used to synthesize a series of Co3O4/NiO nanocomposites. The synthesized specimens were characterized using various experimental techniques. It was found that these nanocomposite samples exhibited good dielectric properties for high frequency applications, and also showed improved electrochemical properties compared to their component materials.
PHYSICA B-CONDENSED MATTER
(2022)
Article
Chemistry, Analytical
Adil Shafi, Sayfa Bano, Lalita Sharma, Aditi Halder, Suhail Sabir, Mohammad Zain Khan
Summary: Development of multifunctional ternary nanocomposite based electrocatalysts for detection of toxic elements and generation of renewable energy describes the synthesis of a multifunctional graphitic carbon nitride decorated BiVO4/Ag2CO3 hierarchical ternary nanocomposite for sensing and water splitting applications. The modified electrode exhibits excellent redox behavior for simultaneous detection of 4-Nitrophenol and 4-Nitroaniline, as well as admirable activity and stability for oxygen evolution reactions.
Article
Chemistry, Physical
Sayfa Bano, Adil Shafi Ganie, Rashid Imran Ahmad Khan, Saima Sultana, Mohammad Zain Khan, Suhail Sabir
Summary: Novel PPy/Bi2MoO6/chitosan nanocomposites have been prepared for the efficient and reliable electrochemical detection of toxic pollutants. The nanocomposites exhibit exfoliated morphology and increased surface area, leading to enhanced electrocatalytic and electrochemical activity. Furthermore, the nanocomposites also show potential for the estimation of hydrogen evolution reaction.
SURFACES AND INTERFACES
(2022)
Article
Water Resources
Ankit Singh, Soubhik Mondal, Nibedita Samal, Sanjeev Kumar Jha
Summary: This study addresses input and model uncertainty in a five-day streamflow forecasting system in the Narmada River Basin and evaluates rainfall forecasts obtained from three different meteorological forecast agencies. The results indicate that the forecast accuracy of NCMRWF is better than other forecasting products, and the streamflow generated using the VIC model produces better results.
HYDROLOGICAL SCIENCES JOURNAL
(2023)
Article
Chemistry, Physical
Huma Kausar, Anees Ahmad, Mohd Shoeb Khan, Hesam Salimi Shahraki, Abdul Hakeem Anwer, Mohammad Zain Khan, Shahab A. . A. . Nami
Summary: This work presents the synthesis of bismuth molybdosulphosalicylate cation exchanger Bi-MoS and its polypyrrole (Ppy) nanocomposites with different weight percentages of multi-walled carbon nanotubes (MWCNTs) via a sol-gel approach. The ternary nanocomposites, BiMoS-Ppy, BiMoS-Ppy-0.1MWCNTs, and BiMoS-Ppy-0.2MWCNTs, were characterized by various techniques and showed successful polymerization and formation. The addition of MWCNTs improved the thermal stability of the nanocomposites. Furthermore, the ternary nanocomposites were evaluated for their lead sensing application, and the detection mechanism of Pb2+ ions in BiMoS-Ppy-0.2MWCNTs nanocomposite was discussed.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Materials Science, Multidisciplinary
Waris, Abdul Hakeem Anwer, Fahad Abdulaziz, Salman Latif, Abdulaziz Alanazi, Saima Sultana, Mohammad Zain Khan
Summary: The present study synthesized rGO nanosheets and TiO2 nanoparticles by a green method using aloe vera and gram seeds, respectively. A simple microwave-assisted approach was used to prepare the TiO2/rGO nanosheets composite. The as-prepared materials were characterized using SEM, TEM, XRD, FTIR, XPS, and Raman spectroscopy. The TiO2/rGO-NS composite exhibited a sheet-like nature and was used as the cathode with a carbon cloth substrate. The electrochemical properties of the materials were studied using cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy. The TiO2/rGO-NS composite coated carbon cloth cathode showed a maximum specific capacitance (599.9 Fg(-1)) and energy density (83.31 Whkg(-1)) at a current density of 1 Ag-1.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Biotechnology & Applied Microbiology
Mohanraj Karthik Ganesh, Ganesh Lakshmanan, Mohammad Zafar Iqbal Khan, Seppan Prakash
Summary: Mucuna pruriens Linn. (M. pruriens), a leguminous plant, has shown therapeutic efficacy in treating male-related infertility. It exhibits antioxidant, androgenic, aphrodisiac, and spermatogenic properties. This study investigates the rejuvenating effects of M. pruriens on the aged rat testis microenvironment.
Article
Chemistry, Multidisciplinary
Ankit Singh, Javed Sheikh
Summary: The demand for new efficient functional molecules has increased due to the growing need for innovative routes to develop functional textiles. Dyes, with their strong dye-fiber interaction, can provide durable functional protection to textiles. This research focuses on the development of a mosquito-repellent and UV-protective acrylic fabric using a novel cationic dye. The synthesized cationic dye was characterized and used for dyeing the acrylic fabric, and the dyed fabrics showed excellent coloration, mosquito-repellent action, and UV-protective properties.
Article
Chemistry, Physical
Adil Shafi Ganie, Noorul Bashar, Sayfa Bano, Shariqah Hijazi, Saima Sultana, Suhail Sabir, Mohammad Zain Khan
Summary: We synthesized a graphene oxide supported In2O3/CeO2 ternary nanocomposite for enhanced photodegradation and electrochemical sensing. The nanocomposites exhibited efficient photocatalytic degradation of Congo red (CR) and methylene blue (MB) dyes, with degradation rates reaching 94% in 130 min and 95% in 91 min, respectively. The composite also showed excellent electrochemical activity, with a sensitivity of 4.635 mu A mM-1 cm-2 and a low detection limit of 0.036 mu M for the sulfa drug sulfamaxole. The composite's increased degradation and redox behavior can be attributed to enhanced photon absorption, efficient charge transfer, and suppression of charge recombination.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Environmental
Mohammad Danish Khan, Ankit Singh, Mohammad Zain Khan, Shamas Tabraiz, Javed Sheikh
Summary: The usage of dyes is increasing in the expanding industrial sector, leading to a significant generation of dye wastewater, especially in the textile industry. This wastewater negatively affects the environment and various forms of life. Various treatment technologies, including physical, physicochemical, chemical, and biological methods, have been extensively reviewed to mitigate the environmental impact of dye wastewater. Each method has its advantages and challenges, and biological-based treatments show promise due to their low-cost, low energy requirement, and environmental friendliness.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Review
Materials Science, Biomaterials
Waris, Abul Hasnat, Shumaila Hasan, Sayfa Bano, Saima Sultana, Alex Omo Ibhadon, Mohammad Zain Khan
Summary: Since 1970, many artificial enzymes that mimic natural enzymes have been discovered. Nanozymes, a type of nanomaterials, have enzyme-like properties and can catalyze natural enzyme processes. They have attracted great interest in biomedicine due to their stability, reactivity, and cost-effectiveness. This article provides a comprehensive overview of the advances in nanozymes and their biological applications, as well as discusses future perspectives and barriers for their therapeutic use.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Energy & Fuels
Wasi Ur Rahman, Mohammad Danish Khan, Benazir Khurshid, Mohammad Zain Khan, Gopinath Halder
Summary: Increasing population has led to water and energy crises, requiring the treatment of wastewater for human use. This study focuses on degrading wastewater with hazardous toluene and simultaneously recovering energy through anaerobic digestion. The optimal degradation efficiency was achieved when 200 mg/L toluene was degraded with 1 g/L of glucose.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Engineering, Environmental
Sadaf Shakeel, Mohammad Zain Khan
Summary: Microbial electrosynthesis (MES) is a promising approach for reducing carbon footprints by converting carbon dioxide into value-added products and biofuels. However, the technology still faces challenges such as low production rates, high costs, and energy consumption. This study addresses these issues by introducing a cost-effective packed-fluidized cathode and a separate reactor for bioalcohol production from dilute acetate. These innovations improve the bioavailability of CO2 and enhance biofuel production.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Nishat Khan, Abdul Hakeem Anwer, Saima Sultana, Alex Ibhadon, Mohammad Zain Khan
Summary: This study investigated the application of microbial fuel cells in treating wastewater contaminated with textile dyes. The results showed that the performance of microbial fuel cells was directly affected by the addition of toxicants, and microbial fuel cells demonstrated potential as toxicity detectors. Additionally, cyclic voltammetry and electrochemical impedance spectroscopy confirmed the bioactivity of microbial fuel cells and the presence of biofouling.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Biotechnology & Applied Microbiology
Mohammad Danish Khan, Shamas Tabraiz, Ravikumar Thimmappa, Da Li, Abdul Hakeem Anwer, Keith Scott, Mohammad Zain Khan, Eileen Hao Yu
Summary: This study investigated the advantages of using low-cost polyaniline-fabricated stainless steel fiber felt anode-based microbial fuel cells (PANI-SSFF-MFCs) for azo dye acid blue 29 (AB29) containing wastewater treatment integrated with an aerobic bioreactor. The findings showed that the PANI-SSFF anode decreased the MFC internal resistance and achieved high power density and decolorization efficiency. The study also observed significant changes in the microbial community in MFCs.
FRONTIERS IN CHEMICAL ENGINEERING
(2022)
