Article
Engineering, Environmental
Xuezhu Xiang, Xiaohui Yi, Wanbing Zheng, Yingqiang Li, Chao Zhang, Xinzhi Wang, Zhenguo Chen, Mingzhi Huang, Guang-Guo Ying
Summary: Long-term usage of thiamethoxam has posed a serious threat to non-target organisms and ecological security. In this study, a novel polyvinyl alcohol/sodium alginate/biochar bead was used for immobilizing a high-efficiency thiamethoxam-degrading bacterium, Chryseobacterium sp H5. The results showed that the immobilized microbes in the PVA/SA/biochar beads exhibited significantly higher removal and biodegradation rates of thiamethoxam compared to other immobilization methods. Additionally, the PVA/SA/biochar beads showed increased tolerance to extreme conditions. This work suggests the potential of the PVA/SA/biochar beads for effective bioremediation of thiamethoxam contamination.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Multidisciplinary Sciences
Pieter Candry, Bruce J. Godfrey, Ziwei Wang, Fabrizio Sabba, Evan Dieppa, Julia Fudge, Oluwaseyi Balogun, George Wells, Mari-Karoliina Henriikka Winkler
Summary: This study investigates the effects of crosslinking pH and time on the properties of PVA-SA-BS beads. The results show that the properties of the beads are primarily influenced by the crosslinking pH, with pH 3 and 4 beads demonstrating better elasticity and diffusion rates.
SCIENTIFIC REPORTS
(2022)
Article
Microbiology
Rui Chen, Zhenhua Zhao, Tao Xu, Xiaoqiang Jia
Summary: In this study, a highly efficient natural PHE-degrading microbial consortium HJ-SH was isolated from soil contaminated with PHE. The consortium showed a degradation efficiency higher than any other natural or engineered strains reported so far. Seven dominant strains were identified from the consortium, and one strain, SH-4, showed the strongest PHE degradation ability. The consortium exhibited high tolerance for PHE and was capable of degrading other organic pollutants as well. An artificial consortium HJ-7 was constructed, which outperformed the natural consortium HJ-SH in terms of reproducibility, application stability, and modification potential.
Article
Chemistry, Physical
Elena V. Zhurishkina, Elena V. Eneyskaya, Svetlana V. Shvetsova, Lyudmila V. Yurchenko, Kirill S. Bobrov, Anna A. Kulminskaya
Summary: Xanthan is a polysaccharide produced by Xanthomonas campestris bacteria and widely used in various industries. Researchers have isolated a bacterial community, LE-C1, capable of reducing xanthan viscosity in laboratory conditions. By immobilizing LE-C1 whole cells in a poly(vinyl alcohol) cryogel, a regenerative biocatalyst that can complete xanthan depolymerization without loss of activity or degradation of the matrix has been developed.
Article
Engineering, Environmental
Suat Peng Sam, Rohana Adnan, Si Ling Ng
Summary: This study focused on modeling and optimizing the process variables for immobilizing activated sludge in PVA/alginate cryogel beads using response surface methodology. The interactions between alginate concentration with CaCl2 concentration, alginate concentration with number of freezing-thawing cycle, and alginate concentration with bead size significantly affected the performance of cryogel beads. The predicted results were consistent with experimental runs, showing the potential for high PNP biodegradation rates and minimal breakage with specific parameter settings.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Engineering, Environmental
Ines Aguilar-Romero, Fernando Madrid, Jaime Villaverde, Esmeralda Morillo
Summary: This study successfully applied the C7 consortium extracted from sewage sludge to accelerate the degradation of IBP, both in solution and adsorbed in sludge. The C7 consortium enriched specific bacterial species, with S. wittichii likely being the key player in IBP mineralization. Furthermore, several bacterial strains that were not previously described as IBP degraders were isolated and identified.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Environmental Sciences
Rongni Dou, Jianteng Sun, Jing Lu, Fucai Deng, Chen Yang, Guining Lu, Zhi Dang
Summary: This study investigated the differences in microbial communities and functional gene compositions between degrading bacteria immobilized in layer-by-layer assembly (LBL) microcapsules and free bacteria during the bioremediation process of phenanthrene (PHE)-polluted soil. Results showed that LBL treatment significantly enhanced PHE degradation and was associated with specific phyla and genera. The main differences in functional metagenomics between LBL and free bacteria treatments were found in higher levels of aromatic hydrocarbon metabolism-related functions and enzymes in the LBL treatment.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Engineering, Environmental
Eman Farid, Elbadawy A. Kamoun, Tarek H. Taha, Ali El-Dissouky, Tarek E. Khalil
Summary: In this study, two marine bacterial isolates were tested for their ability to decompose crude oil. The results showed that embedding the bacteria in PVA-alginate-clay beads significantly improved the degradation rates compared to free cells. The identified bacterial isolates were Pseudomonas stutzeri and Rhodococcus qingshengii.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Construction & Building Technology
Shizhe Zhang, Shan He, Bahman Ghiassi, Klaas van Breugel, Guang Ye
Summary: This paper presents an experimental study on the interface bonding properties of PVA fiber in AASF pastes and reveals the influence of PVA fiber on the surrounding matrix. The research findings indicate that the chemical composition and structure of the fiber-matrix contact area play an important role in the interface bonding properties.
CEMENT AND CONCRETE RESEARCH
(2023)
Article
Environmental Sciences
Wei Shang, Bin Qiao, Qiu-Man Xu, Jing-Sheng Cheng
Summary: In this study, an activated sludge consortium with high bio-removal capability to ciprofloxacin (CIP) and norfloxacin (NOR) was obtained by acclimating with CIP and NOR for 10 days. Biotransformation and bio-adsorption were identified as the two main ways to remove CIP and NOR, with higher biotransformation efficiencies under the acclimated activated sludge consortium compared to the pure culture of Enterobacter sp. S5. The main biotransformation products were N-acetylciprofloxacin and N-acetylnorfloxacin, and acetyltransferase may be involved in the biotransformation process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Lenka McGachy, Radek Skarohlid, Marek Martinec, Zuzana Roskova, Tereza Smrhova, Michal Strejcek, Ondrej Uhlik, Jiri Marek
Summary: This study investigated the effect of In-Situ Chemical Oxidation (ISCO) using peroxydisulfate (PDS) on a chloroethenes-degrading microbial consortium in the presence of perchloroethene (PCE). The results showed that coupling PDS with microbial consortium did not improve PCE removal efficiency and indigenous microbes may reduce the efficiency of PDS during a remediation process. High-throughput 16S rRNA gene sequencing analysis revealed a negative impact of PDS on organohalide-respiring bacteria (OHRB).
Article
Environmental Sciences
Chenchen Lyu, Yuen Zhu, Guixiang Zhang, Hua Li
Summary: In this study, novel composite materials of beads containing alginate, carboxymethyl cellulose and diatomite (SCD) were used to encapsulate Bacillus subtilis for the removal of phenanthrene (PHE) from simulated soil washing eluent with rhamnolipid. The optimized conditions for PHE removal were determined as SCD bead dose 16.2% (w:v), pH 7.1 and 30.6°C. SCD beads showed higher PHE removal efficiency and degradation rate compared to free bacteria, providing potential for the treatment of complex soil-washing eluent.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Environmental
Xiang Tang, Baowei Zhang, Changzheng Fan, Guangming Zeng, Weiping Xiong, Chengyun Zhou, Yang Yang, Xiaoya Ren, Xiaopei Li, Kunyue Luo
Summary: The addition of cationic polyacrylamide (cPAM) was effective in alleviating the toxicity of PVC microplastics on the anaerobic digestion of waste activated sludge, leading to increased methane production and overall efficiency of the anaerobic system. This positive impact was mainly attributed to cPAM reducing leaching of bisphenol-A (BPA) and the efficiency of reactive oxygen species (ROS) entering the microbial cells.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Zhi-Yi Hu, Shuai Wang, Zi-Qian Geng, Kun Dai, Wen-Xiang Ji, Ye-Chao Tian, Wen-Tao Li, Raymond Jianxiong Zeng, Fang Zhang
Summary: The study presented a enriched alginate-degrading consortium (ADC) to control volatile fatty acids (VFAs) production from waste activated sludge (WAS) and maintain cell integrity. Results showed that dosing with ADC increased hydrolysis and acidification efficiency, while reducing the release of nitrogen and phosphorus.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Microbiology
Emerance Jessica Claire D'Assise Goma-Tchimbakala, Ilaria Pietrini, Federica Dal Bello, Joseph Goma-Tchimbakala, Stefano Lo Russo, Stefano Paolo Corgnati
Summary: This study aimed to develop bacterial consortia for oil recovery and address the issue of oil contamination worldwide. Metagenomics analysis revealed the presence of hydrocarbon degraders in LF2 soil. Three bacterial strains were isolated, and one strain showed the most potential for further bioremediation investigation. The immobilization of consortia improved the bioremediation potential, while the addition of surfactants failed to enhance crude oil degradation.
Article
Engineering, Environmental
Morteza Nazerian, Behrooz Keshtegar, Zahra Beyki, Ali Partovinia
Summary: The study evaluated the optimum conditions for manufacturing particleboard-based waste cotton stalks to achieve good mechanical properties using RSM and AHS algorithms. The RSM provided accurate predictions for mechanical properties, while AHS successfully optimized the composite conditions.
WASTE MANAGEMENT & RESEARCH
(2021)
Article
Environmental Sciences
Elham Khanpour-Alikelayeh, Ali Partovinia, Ahmad Talebi, Hossein Kermanian
Summary: Petroleum contamination in marine environments causes serious harm to ecosystems, but bioremediation with immobilized microorganisms shows promise for oil-polluted environments. In this study, Bacillus licheniformis was immobilized in Ca alginate beads for oil biodegradation, with optimized variables leading to higher degradation rates compared to freely suspended cells. The effectiveness of the process variables differed between free and immobilized cell systems, with immobilized cells showing greater potential for crude oil degradation.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2021)
Article
Engineering, Environmental
Panteha Pirieh, Fereshteh Naeimpoor
Summary: In this study, sulfur-oxidizing bacteria were used to oxidize thiosulfate into elemental sulfur, and the distribution of products under different reaction conditions was investigated. The results from shake flasks and stirred bioreactors showed that the consortium had higher thiosulfate oxidation efficiency and elemental sulfur formation rate.
BIOREMEDIATION JOURNAL
(2023)
Article
Environmental Sciences
Ali Partovinia, Ali Abolhasani Soorki, Mojtaba Koosha
Summary: The study demonstrated the successful application of slurry phase bioremediation and microbial cell immobilization in the remediation of heavy crude oil pollution, showing the advantages of hybrid matrix in TOC reduction and adsorption-biodegradation capacity through experimental results.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Polymer Science
Elham Vatankhah, Mohammad Abasnezhad, Morteza Nazerian, Mohammad Barmar, Ali Partovinia
Summary: The integration of polyurethane foams with phase change materials (PCMs) provides thermal regulation properties and mechanical strength. By adjusting the PCM content, the thermal regulation capacity of the composite foams can be controlled, while the inclusion of PCM affects the cell size and compressive properties of the foams. The study suggests that one-shot synthesized PU-PCM composite foams can offer reasonable thermal regulation properties, thermal reliability, and mechanical strength.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Engineering, Mechanical
Morteza Nazerian, Seyed Ali Razavi, Ali Partovinia, Elham Vatankhah, Zahra Razmpour
Summary: The main goal of this study is to evaluate different approaches for predicting and evaluating the bonding strength of glued laminated timber manufactured using walnut wood layers and a natural adhesive, with the aim of reducing formaldehyde emissions. The study found that response surface methodology provides better predictive performance with lower levels of errors compared to adaptive neuro-fuzzy inference network and artificial neural network. Additionally, the other two methods support the response surface methodology approach for accurate evaluation and optimal production point determination in laminated product fabrication.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART E-JOURNAL OF PROCESS MECHANICAL ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Morteza Nazerian, Fateme Naderi, Ali Partovinia, Antonios N. Papadopoulos, Hamed Younesi-Kordkheili
Summary: The study aimed to improve the performance of ANFIS and predict the flexural strength of sandwich panels using metaheuristic optimization methods. Different bio-inspired paradigms like ACOR, DE, GA, and PSO were compared, with ANFIS-GA model found to be the most accurate.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART L-JOURNAL OF MATERIALS-DESIGN AND APPLICATIONS
(2022)
Article
Energy & Fuels
Fariba Sadat Kamelian, Fereshteh Naeimpoor, Toraj Mohammadi
Summary: This study compared bioethanol production using different strains with low inoculum size. The results showed that individual cultures of Zymomonas mobilis and Pichia stipitis had the highest glucose and xylose conversion efficiencies, respectively. A sequential-co-immobilized strategy improved xylose conversion, yield, and overall productivity. The strategy was also tested in a bioreactor, resulting in increased xylose uptake rate, xylose conversion, and ethanol productivity compared to the sequential-co culture.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Environmental Sciences
Mojgan Mohebi Najafabadi, Fereshteh Naeimpoor
Summary: This study investigated the growth and product formation of Dunaliella salina under different illuminations. RB illumination in a two-stage strategy enhanced the productivity of lipid, starch, and beta-carotene. RB-RR strategy stimulated cell growth while RB-BB strategy resulted in the lowest biomass level and nitrate removal.
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
(2023)
Article
Biotechnology & Applied Microbiology
Afsaneh Chehreara, Fatemeh Tabandeh, Maryam Otadi, Afshar Alihosseini, Ali Partovinia
Summary: The release behavior of Lacticaseibacillus rhamnosus from alginate-chitosan microcapsules was studied, and the layer-by-layer self-assembly technique provided stable and target release for the double bilayer microcapsules, which have potential for targeted and controlled delivery of probiotics and drugs.
BIOTECHNOLOGY LETTERS
(2022)
Article
Biotechnology & Applied Microbiology
Gelareh Sheibani Madrahi, Naeimpoor Fereshteh
Summary: This study investigated the synthesis capacity of Scytonemin in the marine cyanobacterium Leptolynbya mycodia under different stressful conditions. The results showed that nitrate deficiency and salt stress can induce Scytonemin synthesis, while temperature elevation cannot. However, the synthesis of Scytonemin can be intensified under all examined abiotic stressors in conjunction with ultraviolet radiation (UVR).
JOURNAL OF APPLIED PHYCOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Fariba Sadat Kamelian, Fereshteh Naeimpoor, Toraj Mohammadi
Summary: This study investigates the efficient fermentation of high glucose and xylose levels via an innovative two-stage fermentation-pervaporation process. The use of immobilized Zymomonas mobilis and Pichia stipitis in a sequential-co-immobilized culture improves bioethanol productivity and reduces inhibitions. The study also fabricates a tubular superhydrophobic silicalite-1/PDMS pervaporative membrane to reduce inhibitions. The results show improved xylose conversion and ethanol productivity, making it a robust integrated process for second-generation bioethanol production.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Green & Sustainable Science & Technology
Ali Partovinia, Maryam Salimi Koochi, Mohammad Talaeian, Esmaeil Rasooly Garmaroody
Summary: This study compares the efficiency of bioethanol production from bagasse pith using free and immobilized Pichia stipitis. The results show that immobilized cells have a higher ethanol production compared to free cells, and the bead size significantly affects the ethanol production.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Multidisciplinary Sciences
Ali Partovinia, Elham Vatankhah
Summary: The presence of cyclic organic compounds, including phenol, in industrial wastewater has made the removal of phenol an important issue. In recent years, the use of immobilized microbial cells has gained attention as a new approach in wastewater treatment. This study aimed to investigate the effect of immobilized beads size on phenol degradation efficiency and microbial growth rate. The results showed that the immobilized cell system had better performance in removing phenol at higher concentrations, particularly with smaller beads, due to improved mass transfer and protection of microbial cells.
Article
Biotechnology & Applied Microbiology
Gelareh Sheibani Madrahi, Fereshteh Naeimpoor
Summary: This study examined the effect of cultivation method on scytonemin productivity using the cyanobacterium Leptolyngbya mycodia (IBRC-M-5200). A two-stage illumination strategy was utilized to enhance scytonemin synthesis, resulting in higher yields compared to submerged growth. The proposed attached growth system (AG-PB) showed promising results in terms of biomass and scytonemin production.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Biotechnology & Applied Microbiology
Shaofeng Zhou, Wenwen An, Cuifen Gan, Meiying Xu
Summary: Bacteria generate and release extracellular reactive oxygen species (eROS), which significantly contribute to the natural ROS pool and play a crucial role in metabolic interactions of bacteria with their environment. Understanding the behavior of eROS-generating bacteria and its environmental implications is of great importance in the cycling of biogeochemical elements, transformation of organic matter, and regulation of antibiotic resistance genes.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Ji-Dong Gu, Tim Ford, Bryce Mitton, Ralph Mitchell
Summary: Plastics and microplastics are widely present and accumulating in the environment, leading to increasing public attention. In addition to packaging plastics, materials from industries such as electronics, space and aviation are also accumulating, but receiving less attention. The production of degradable and biodegradable plastics is seen as a way to reduce environmental impacts, but enhancing the non-degradability of functional polymers is also a feasible option. Microbial colonization and deterioration pose significant challenges to these materials.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Justyna Bohacz, Michal Mozejko
Summary: This study evaluated the keratinolytic activity of 37 strains of Trichophyton ajelloi and found that pigmented strains isolated from loamy soil were more efficient in degrading native feather keratin, while non-pigmented strains isolated from chernozem showed better abilities. The keratinolytic activity increased over time, as evidenced by the increase in extracellular keratinase activity and release of soluble proteins and peptides. Protease activity peaked in the first 7 days and again on day 28 of culture. The release of ammonium and sulfate ions, associated with an increase in pH, reached its maximum on day 21. Three pigment-producing strains were among the most active in releasing large amounts of ammonium and sulfate ions. The biodegradation of feather waste by Trichophyton ajelloi strains can be used to produce fertilizers suitable for plants with high sulfur requirements.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Joseph M. Suflita, Brenda J. Little
Summary: This article reviews the major achievements of the International Biodeterioration & Biodegradation Society (IBBS) on its 50th anniversary and provides recommendations for addressing new challenges and developments based on personal experiences.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Zhenyan Lin, Tuo Jin, Xin Xu, Xiao Yin, Dan Zhang, Mengjiao Geng, Chunyu Pang, Gongwen Luo, Lizhi Xiong, Jianwei Peng, Jiangchi Fei
Summary: The incomplete recycle of residual mulch film (RMF) in recent years has led to an increase in plastic fragments in soil, posing a serious threat to the soil ecological environment. In this study, seven potential plastic-degrading microorganisms were screened and identified from film-mulched vegetable fields. The degradation ability experiments showed that both single strains and mixed strains demonstrated varying levels of degradation of RMF.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Tiina Belt, Michael Altgen, Muhammad Awais, Martin Nopens, Lauri Rautkari
Summary: This study investigated the degradation of heat-treated wood by brown rot fungi and found that the decay increased the hygroscopicity of wood in the decaying state. Furthermore, it was observed that heat-treated samples were more susceptible to fungal decay compared to untreated samples, which may be related to the increase in moisture content.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
Article
Biotechnology & Applied Microbiology
Marta Cicardi, Davide Bernasconi, Luca Martire, Linda Pastero, Giulia Caneva, Sergio E. Favero-Longo
Summary: This study investigated the phenomenon of Centimetric circular areas Uncolonized by Microbial Biofilms (CUMBs) on natural and heritage stone surfaces. The analysis revealed a compatibility in distribution and size between CUMBs and lichen thalli, suggesting a lichen origin for some CUMBs. Microscopic analysis also showed similar modifications in marble layers beneath CUMBs and lichens, indicating a possible alteration of stone properties by lichens.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2024)
