Article
Engineering, Chemical
Tiago P. Silva, Susana M. Paixao, Joao Tavares, Catia Gil, Cristiana A. Torres, Filomena Freitas, Luis Alves
Summary: This study evaluated the potential of Gordonia alkanivorans strain 1B as a producer of biosurfactants and bioemulsifiers (BS/BE), and performed initial characterization of the compounds produced. The results demonstrated that strain 1B was capable of synthesizing BS/BE compounds in various hydrophobic phases, without the need for a hydrophobic inducer. The produced compounds exhibited excellent surfactant and emulsifying properties, outperforming many commercial alternatives.
Review
Microbiology
Mainu Kalita, Mahananda Chutia, Dhruva Kumar Jha, Gangavarapu Subrahmanyam
Summary: Biodesulfurization (BDS) is a selective method for removing sulfur compounds from crude oil using desulfurizing microbes. Gordonia species of actinomycetes have been widely used in petroleum refining technology for BDS, and can desulfurize different types of organic sulfur compounds. However, factors such as enzyme specificity, availability of cofactors, and toxicity of pollutants limit the desulfurization rate of microbial biocatalysts, requiring further research.
CURRENT MICROBIOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Tiago P. P. Silva, Susana M. M. Paixao, Luis Alves
Summary: Biodesulfurization is a biotechnological process that uses microorganisms as biocatalysts to remove sulfur from fuels without affecting their hydrocarbon structure. The inhibition of biodesulfurization activity by easily metabolized sulfur compounds, such as sulfates, is a bottleneck hindering its large-scale application. This study demonstrates that biocatalysts with biodesulfurization activity can be produced using sulfate as the only sulfur source, without the need for inducers or genetic manipulation, by adjusting the sulfur : carbon ratio in continuous culture. This novel procedure has been successfully applied to different desulfurizing microorganisms.
Article
Multidisciplinary Sciences
Olawumi Oluwafolakemi Sadare, Michael Olawale Daramola
Summary: Biodesulfurization (BDS) was used to degrade dibenzothiophene (DBT) in diesel using two Pseudomonas sp. bacteria. The desulfurization pathways of DBT were determined by gas chromatography (GC)/mass spectrometry (MS) and High-Performance Liquid Chromatography (HPLC). Results showed promising potential for decreasing the sulfur content of South African diesel oil.
SCIENTIFIC REPORTS
(2023)
Article
Biochemistry & Molecular Biology
Sarah van Dinteren, Jocelijn Meijerink, Renger Witkamp, Bo van Ieperen, Jean-Paul Vincken, Carla Araya-Cloutier
Summary: This study analyzed the composition, antimicrobial activity, and cytotoxicity of prenylated phenolic extracts from different species of liquorice. The results showed that the extracts contained potent antimicrobial compounds that could inhibit the growth of various bacteria.
Article
Biochemistry & Molecular Biology
Loredana Marcolongo, Francesco La Cara, Giovanni del Monaco, Susana M. Paixao, Luis Alves, Isabel Paula Marques, Elena Ionata
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2019)
Article
Environmental Sciences
Vera Salgado, Cesar Fonseca, Teresa Lopes da Silva, Jose Carlos Roseiro, Ana Eusebio
WASTE AND BIOMASS VALORIZATION
(2020)
Article
Environmental Sciences
Tiago P. Silva, Luis Alves, Susana M. Paixao
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2020)
Article
Biophysics
Joao Tavares, Luis Alves, Tiago P. Silva, Susana M. Paixao
Summary: This study developed a rapid and simple analytical method to quantify the emulsifying activity of a product produced by the actinomycete Gordonia alkanivorans strain 1B (BS/BE), which involves forming a stable emulsion when mixed with n-heptane. Validation through testing synthetic surfactants and dishwashing detergents demonstrated the accuracy and reproducibility of this new analytical approach, making it a promising tool for screening and monitoring studies on BS/BE production.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Engineering, Chemical
Tiago P. Silva, Susana M. Paixao, Joao Tavares, Catia Gil, Cristiana A. Torres, Filomena Freitas, Luis Alves
Summary: This study evaluated the potential of Gordonia alkanivorans strain 1B as a producer of biosurfactants and bioemulsifiers (BS/BE), and performed initial characterization of the compounds produced. The results demonstrated that strain 1B was capable of synthesizing BS/BE compounds in various hydrophobic phases, without the need for a hydrophobic inducer. The produced compounds exhibited excellent surfactant and emulsifying properties, outperforming many commercial alternatives.
Review
Energy & Fuels
Mariana Abreu, Luis Silva, Belina Ribeiro, Alice Ferreira, Luis Alves, Susana M. Paixao, Luisa Gouveia, Patricia Moura, Florbela Carvalheiro, Luis C. Duarte, Ana Luisa Fernando, Alberto Reis, Francisco Girio
Summary: Energy crops are dedicated cultures that can produce biofuels, electricity, and heat. They are tolerant to contaminated lands, alleviating land pollution and reducing land-use conflicts. Further study and investment in energy crops are necessary to link them with biorefineries.
Article
Environmental Sciences
Joao Tavares, Tiago P. Silva, Susana M. Paixao, Luis Alves
Summary: Microalgae cultivation is used to convert CO2 emissions into fuels, food, and chemicals, increasing the sustainability of carbon emitting processes. Continuous operation of microalgae systems is required to sequester emissions, and bench-scale photobioreactors are necessary for optimizing culture parameters. This study developed a continuous bench-scale photobioreactor that operated as an autotrophic chemostat, successfully sequestering biogenic CO2 and achieving high biomass productivity.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Multidisciplinary
Tiago P. P. Silva, Susana M. M. Paixao, Luis Alves
Summary: Biodesulfurization is a biotechnological process that uses microorganisms as biocatalysts to remove sulfur from fuels without affecting their hydrocarbon structure. The inhibition of biodesulfurization activity by easily metabolized sulfur compounds, such as sulfates, is a bottleneck hindering its large-scale application. This study demonstrates that biocatalysts with biodesulfurization activity can be produced using sulfate as the only sulfur source, without the need for inducers or genetic manipulation, by adjusting the sulfur : carbon ratio in continuous culture. This novel procedure has been successfully applied to different desulfurizing microorganisms.
Article
Chemistry, Multidisciplinary
Marta Pacheco, Susana M. Paixao, Tiago P. Silva, Luis Alves
Article
Environmental Sciences
Elizabeth Alvarez-Chavez, Stephane Godbout, Mylene Genereux, Caroline Cote, Alain N. Rousseau, Sebastien Fournel
Summary: This study evaluated the effect of alternative filtering materials and bed aeration on the retention of nutrients and fecal bacteria in woodchip bedded stand-off pads for cows. The results showed that the alternative biofilters were more efficient in removing COD, SS, TN, and NO3-N, while conventional biofilters were more efficient for PO4-P removal. Aeration did not have a significant effect under the tested temperature conditions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yike Zhang, Zengyi Ma, Zhuoting Fang, Yuandong Qian, Zhiping Huang, Yilong Ye, Jianhua Yan
Summary: This study investigates the application of oxygen enrichment melting technology in the melting of municipal solid waste incineration fly ash. The results demonstrate that oxygen enrichment technology can reduce energy consumption and operating costs, as well as decrease pollution emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Liangang Xiao, Mingkai Leng, Philip Greenwood, Rongqin Zhao, Zhixiang Xie, Zengtao You, Junguo Liu
Summary: This study investigates the effects of grazing exclusion on soil organic carbon (SOC) accumulation and vegetation recovery. It finds that grazing exclusion can increase the potential for SOC accumulation, and higher annual precipitation is positively correlated with SOC accumulation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Beatrice Cantoni, Jessica Ianes, Beatrice Bertolo, Selena Ziccardi, Francesco Maffini, Manuela Antonelli
Summary: This study evaluates the performance of ozonation and adsorption as in-series processes compared to standalone processes for the removal of Contaminants of Emerging Concern (CECs) in drinking water. The combination of both processes proves to be more effective than adsorption and ozonation alone. Ozonation improves the adsorption performance of poorly-oxidizable CECs but worsens that of well-oxidizable compounds. This research highlights the importance of considering both processes in the removal of CECs in drinking water treatment plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Dan Li, Bingjun Liu, Yang Lu, Jianyu Fu
Summary: A new Standardized compound Drought and Saltwater intrusion Index (SDSI) was developed to detect changes in the severity of CDSEs in six estuaries. The study found that saltwater intrusion plays a dominant role in influencing SDSI severity, and CDSEs vary in frequency, duration and severity among different estuaries.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yong-Qiang Li, Rui Sun, Chong-Miao Zhang, Zi-Xuan Liu, Rui-tao Chen, Jian Zhao, Hua-dong Gu, Huan-Cai Yin
Summary: In this study, an electron beam excitation multi-wavelength ultraviolet (EBE-MW-UV) system was established and found to have significantly higher microbial inactivation effects compared to single-wavelength UV-LEDs in water. Mechanism analysis revealed that EBE-MW-UV damaged microbial DNA and proteins, and generated additional reactive oxygen species, leading to microbial inactivation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Kaili Ma, Xinxin Han, Qiujuan Li, Yu Kong, Qiaoli Liu, Xu Yan, Yahong Luo, Xiaopin Li, Huiyang Wen, Zhiguo Cao
Summary: This study reveals that the use of a tryptophan-degrading microbial consortium (TDC) can enhance the hydrolysis efficiency of waste activated sludge (WAS), increasing the yield and quality of short chain fatty acids (SCFAs) and improving the solubilization and release of organic substances from WAS.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Ling Xiong, Rui Li
Summary: Incorporating Ecosystem Service Value (ESV) into land use planning can provide informed land management decisions. This study evaluates the ESV of Guizhou Province in China's karst region. The results show an increase in total ESV over the past two decades due to ecological restoration projects.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
M. Geetha Jenifel
Summary: This article discusses the importance of water and the pollution of freshwater resources, and introduces the use of machine learning models and blockchain technology to predict and protect water quality.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Stanslaus Terengia Materu, Taotao Chen, Chang Liu, Daocai Chi, Meng Jun
Summary: The study showed that H2SO4-modified biochar can reduce P leaching, increase soil available P, and enhance plant P uptake in alternate wetting and drying irrigation systems. Biochar additions B20A and IAWDB20A-M were effective in improving yield, reducing P leaching, and increasing APB.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Amir Nouri, Ali Akbar Zinatizadeh, Sirus Zinadini, Mark Van Loosdrecht
Summary: This study focuses on the development of an air-lift bio-electrochemical reactor (ALBER) with a continuous feeding regime to enhance nitrogen removal from synthetic wastewater. The effect of temperature, hydraulic retention time (HRT), N -NH+4 /TN ratio, and current density on the reactor performance was investigated, and the ALBER achieved a maximum TN removal of 73%. The results suggest that the ALBER has potential for treating industrial wastewater at low temperatures.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Peifang Wang, Guoxiang You, Yang Gao, Juan Chen, Xun Wang, Chao Wang
Summary: This study investigated the ecological processes of microbial communities and N- and P-transformation processes in multistage agricultural drainage ditches. The results showed that the microbial communities were co-shaped by agricultural practices and ditch size, which further governed the N and P removal performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Xiaofeng Niu, Huan Wang, Tao Wang, Peiyu Zhang, Huan Zhang, Hongxia Wang, Xianghong Kong, Songguang Xie, Jun Xu
Summary: Microorganisms play a critical role in maintaining ecosystem balance, and environmental stressors can affect the assembly processes of microbial communities. The study found that different stressors have opposite effects on microbial community assembly in water and sediment, and warming has different influences compared to herbicides and nutrients.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Yuqing Tan, Qiming Cheng, Fengwei Lyu, Fei Liu, Linhao Liu, Yihong Su, Shaochun Yuan, Wenyu Xiao, Zhen Liu, Yao Chen
Summary: The exacerbation of global warming, extreme weather events, and rapid urbanization have led to increased flooding in urban areas. China has adopted sponge city as an efficient means of preventing and controlling urban floods. Using a SWMM-FVCOM model, the hydrological reduction and control effect of sponge city construction (SPCC) within a university campus were evaluated. The study found that implementing SPCC effectively mitigates surface runoff and reduces the severity of urban flooding. However, the efficacy of runoff control decreases with longer rainfall return periods.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Zhonghan Chen, Qiuyan Li, Shibo Yan, Juan Xu, Qiaoyun Lin, Zhuangming Zhao, Ziying He
Summary: Tidal rivers are important biochemical reaction channels, receiving carbon from wastewater and agricultural drains, affecting CO2 emissions. Through modeling and data analysis, researchers explored carbon distribution, emissions, and greenhouse effects, emphasizing the potential of river management to change global CO2 emissions under climate change.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)