Article
Biotechnology & Applied Microbiology
Leonardo Murilo Aoyagi, Douglas Henrique Baracho, Ana Teresa Lombardi
Summary: In this study, a manipulative strategy combining low-dose copper and blue/red lights was used to induce biomolecule accumulation in microalgae. The results showed a significant increase in carotenoids, carbohydrates, and proteins under the appropriate copper concentration and blue light conditions. Blue light had the most significant impact on the algal metabolism.
JOURNAL OF APPLIED PHYCOLOGY
(2023)
Article
Engineering, Environmental
Hengtao Xu, Li'ang Li, Youji Wang, Kecheng Qiu, Siyang Chen, Jiangning Zeng, Ruijuan Liu, Qikun Yang, Wei Huang
Summary: The study compared the effects of microplastics on microalgae from different habitats. The results showed that microplastics had a significant concentration effect on the growth of microalgae, inhibiting photosynthesis and activating the antioxidant system. The effects on freshwater microalgae were found to be more severe than on marine microalgae. This study provides reliable data for understanding the complex effects of microplastics on microalgae and comparing the differential effects among different microalgae.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Hemamalini Rawindran, Kuan Shiong Khoo, Baranitharan Ethiraj, Uganeeswary Suparmaniam, Wai Hong Leong, Ratchaprapa Raksasat, Chin Seng Liew, Nurul Tasnim Sahrin, Man Kee Lam, Worapon Kiatkittipong, Jun Wei Lim, Zakariyya Uba Zango, Muhammad Kashif Shahid, Heba Taha M. Abdelghani, Hui-Suan Ng
Summary: Changing the growth environment for microalgae can lead to changes in cellular biochemicals. Attaching microalgae to palm kernel expeller waste can facilitate harvesting. The study optimized the dosage, light intensity, and photoperiod for maximum microalgal productivity. Different pH levels affected the lipid, protein, and carbohydrate contents of the microalgae, with pH 11 having the highest lipid content and pH 5 having the highest protein and carbohydrate contents. The findings also revealed the role of polar and non-polar interactions in the attachment process.
ENVIRONMENTAL RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
Paul Chambonniere, Adriana Ramirez-Romero, Alexandra Dimitriades-Lemaire, Jean-Francois Sassi, Florian Delrue
Summary: This study monitored the physiological changes of Chlorella vulgaris NIES 227 during lipid accumulation under nutrient limitation and found that the growth capacity of the microalgae can be preserved during the exponential growth phase, but under nutrient limitation, protein content decreases while lipid content increases, and the photosynthetic activity decreases. These findings are important for optimizing industrial processes in microalgae biofuel production.
FERMENTATION-BASEL
(2022)
Article
Ecology
Barbara Rani-Borges, Viviane Moschini-Carlos, Marcelo Pompeo
Summary: This study analyzed 20 scientific articles on the toxic effects of microplastics on freshwater microalgae. The results indicate that factors such as shape, size, concentration, and duration of exposure have significant effects on the impact of microplastics. Research gaps and future research priorities were identified in this study.
Article
Marine & Freshwater Biology
Yuanyuan Su, Liu Gao, Licheng Peng, Xiaoping Diao, Shenyou Lin, Ruiqi Bao, Tariq Mehmood
Summary: This study investigates the aggregation process between different microalgal species and microplastics of different sizes, concentrations, and shapes. It finds that microalgae first attach to the surface of microplastics and form multi-layer aggregations. The degree of aggregation is closely related to the shape and size of microplastics, but less related to their concentration. The aggregation of microplastics inhibits the growth of microalgae and restricts gas and mass transfer between cells and the environment.
AQUATIC TOXICOLOGY
(2023)
Article
Green & Sustainable Science & Technology
Senthil Nagappan Annamalai, Probir Das, Mahmoud I. A. Thaher, Mohammad Abdul Quadir, Shoyeb Khan, Chandan Mahata, Hareb Al Jabri
Summary: Aquafeed accounts for a significant portion of aquaculture operating costs, prompting the need for sustainable and cost-effective alternatives such as microalgae-based feed. This review examines the digestibility of various nutrients and energy from microalgae in fish, highlighting the potential benefits of utilizing microalgae and discussing methods to enhance their digestibility in fish. Further research and optimization in this area may offer promising solutions for future aquafeed development.
Review
Chemistry, Physical
Haixiang Liu, Haotian Bai, Jacky W. Y. Lam, Ryan T. K. Kwok, Ben Zhong Tang
Summary: Aggregation-induced emission (AIE) materials have unique properties in both the solution state and the aggregate state, including absorption, photoluminescence, and heat generation, making them suitable for a wide range of applications. This mini-review summarizes the emerging applications of AIE materials in solar energy utilization, such as luminescent solar concentrators, photosynthesis augmentation, and solar steam generation.
NANOSCALE HORIZONS
(2023)
Article
Engineering, Environmental
Sisi Ye, Miaoyuan Rao, Wenyan Xiao, Junyu Zhou, Ming Li
Summary: This study investigated the toxicity of microplastics (MPs) of different particle sizes to microalgae with different cell diameters. Results showed that larger microalgae cells were more susceptible to the inhibitory effects of MPs. The inhibition rate of MPs on three phyla was Chlorophyta < Cyano-bacteria < Bacillariophyta. Exposure to MPs also caused damage to the antioxidant system of microalgae. These findings contribute to the evaluation of the risk of MPs for aquatic ecosystems.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Environmental Sciences
Yifan Fan, Tong Liu, Xin Qian, Ligang Deng, Wenxin Rao, Qiji Zhang, Jinglan Zheng, Xiang Gao
Summary: This study investigated the metabolic impact of polystyrene microbeads microplastics (PS-MPs) on a common freshwater microalga using metabolomics analysis. The results showed that while PS-MPs had limited effects on microalgal growth and photosynthesis, oxidative stress and microcystin production were slightly increased. Metabolomics analysis revealed that PS-MPs disrupted multiple metabolic pathways in the microalga, particularly those related to arginine.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Multidisciplinary Sciences
Sanaa Mahmoud Metwally Shanab, Abir M. Partila, Hamdy Elsayed Ahmed Ali, Mohd Azmuddin Abdullah
Summary: In this study, extracellular silver nanoparticles (AgNPs) were biosynthesized using Pseudomonas aeruginosa supernatant integrated with gamma radiation. The synthesized AgNPs had a spherical shape with sizes ranging from 6.7 to 12.1 nm and showed monodispersity. AgNPs enhanced lipid production but inhibited cell growth in Chlorella vulgaris and Dictyochloropsis splendida, with significant effects on the fatty acid profile.
JOURNAL OF RADIATION RESEARCH AND APPLIED SCIENCES
(2021)
Article
Ecology
Jordan P. Cuff, Shawn M. Wilder, Maximillian P. T. G. Tercel, Rhiannon Hunt, Somoye Oluwaseun, Paige S. Morley, Rafael A. Badell-Grau, Ian P. Vaughan, James R. Bell, Pablo Orozco-terWengel, William O. C. Symondson, Carsten T. Mueller
Summary: The study introduces a protocol called Macroutrient Extraction and Determination from Invertebrates (MEDI) for the direct, rapid, and relatively low-cost determination of macronutrient content from single small macroinvertebrates. Macronutrients are extracted and determined using colorimetric assays, successfully identifying taxonomic differences in macronutrient content. MEDI can determine macronutrient content in small and large individual invertebrates, with the total cost of around $1.35 per sample and results obtained within around 3 days.
METHODS IN ECOLOGY AND EVOLUTION
(2021)
Article
Biotechnology & Applied Microbiology
Maresa Bussa, Cordt Zollfrank, Hubert Roeder
Summary: This paper presents a parameterised life cycle assessment approach to determine threshold values for input streams in microalgal biorefinery production. The study identifies membrane technologies as more effective for protein and polysaccharide extraction and supercritical carbon extraction as promising for lipid recovery. Further improvements are needed for energy demand in drying processes and protein recovery yields in membrane technologies.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2021)
Article
Environmental Sciences
Qingsheng Cao, Wenbo Sun, Tian Yang, Zhu Zhu, Yinan Jiang, Wenlong Hu, Wenzhi Wei, Yingying Zhang, Hui Yang
Summary: This study explores the toxic effects of different sizes of microplastics on Chlorella pyrenoidosa, finding that 1 micrometer microplastics significantly inhibit the growth of the algae and alter the expression of genes related to photosynthesis and energy metabolism.
Article
Chemistry, Inorganic & Nuclear
Zhijun Zhang, Qinyu Han, Songhan Liu, Zhimin Wang, Ming Hu, Szeto Mun Wai Domnic, Raymond Lau, Bengang Xing
Summary: This study introduces a smart solar energy regulation strategy that uses photon tunable long persistent phosphors as solar energy harvesting antennas to enhance sunlight utilization by photosynthetic organisms in multiple modes.
DALTON TRANSACTIONS
(2021)
Article
Environmental Sciences
Sunitee Gohain Baruah, Imdadul Ahmed, Banashree Das, Bhomtalika Ingtipi, Himangshu Boruah, Sanjay Kumar Gupta, Arvind K. Nema, Mayuri Chabukdhara
Summary: The study revealed heavy metal contamination in the soil-rice system of rural and peri-urban areas in northeast India, with varying levels of pollution in soil and rice samples. Elevated levels of As and non-carcinogenic risks were observed, raising concerns. Potential health risks varied among different rice varieties, highlighting the need for targeted interventions.
Article
Environmental Sciences
Sarkawt Hama, Prashant Kumar, Mohammed S. Alam, Daniel J. Rooney, William J. Bloss, Zongbo Shi, Roy M. Harrison, Leigh R. Crilley, Mukesh Khare, Sanjay Kumar Gupta
Summary: The study investigated the chemical profiles of important pollutant sources in India and found distinct emissions characteristics from different sources. The database developed can assist in accurate quantification of the causes of air pollution through source apportionment studies.
Article
Biotechnology & Applied Microbiology
Trisha Mogany, Virthie Bhola, Luveshan Ramanna, Faizal Bux
Summary: This study evaluated the physiological and pigment production of Chlamydomonas reinhardtii using response surface methodology. It found that nitrogen, carbon, and light irradiance significantly affected the biomass, carotenoid, and chlorophyll yield. Increased photosynthetic activity was associated with high levels of carbon and light.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2022)
Review
Environmental Sciences
Karen Reddy, Nirmal Renuka, Sheena Kumari, Faizal Bux
Summary: This article summarizes the presence of antiretroviral drugs in aquatic environments and wastewater treatment plants, and discusses the advantages and future development directions of algae-based wastewater treatment processes in pharmaceutical removal.
Article
Environmental Sciences
Sayantee Roy, Sanjay Kumar Gupta, Jai Prakash, Gazala Habib, Prashant Kumar
Summary: This review examines the current state of heavy metal contamination in road dust in different cities around the world. It evaluates the ecotoxicological and human health risks associated with heavy metal exposure. The findings show significant variations in contamination levels among cities, countries, and continents. Australia and Asia are identified as the regions most susceptible to heavy metal pollution, while cities in Europe, Africa, and America show no significant risk.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Inorganic & Nuclear
Deepak Gusain, Nirmal Renuka, Abhishek Guldhe, Faizal Bux
Summary: Carbon dots synthesized from lipids and carbohydrates extracted from microalgae showed fluorescence properties at different wavelengths, with red shifting of excitation wavelength observed upon addition of acetone. The synthesized carbon dots exhibited nano-size range and consistent optical behavior across different excitation and emission wavelengths. The generated carbon dots have potential applications in dyes, sensors, bioimaging, and photosensitizers.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Environmental Sciences
Nirmal Renuka, Sachitra Kumar Ratha, Farzana Kader, Ismail Rawat, Faizal Bux
Summary: Algae-based technologies offer potential solutions to societal issues like clean water access and carbon-neutral energy. Recent research has focused on utilizing algae for nutrient recovery and biomass production in wastewater treatment. The coupling of wastewater treatment and algae biomass production appears to be the most sustainable option with the potential for global environmental benefits.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Pfano Musetsho, Nirmal Renuka, Abhishek Guldhe, Poonam Singh, Kriveshin Pillay, Ismail Rawat, Faizal Bux
Summary: Microalgae such as Acutodesmus obliquus show potential for lipid production for biodiesel application, with poultry litter and municipal wastewater as nutrient sources. Pre-treated poultry litter extract (PPLE) resulted in higher biomass production and nutrient removal compared to raw poultry litter extract (RPPE). The use of lipid extracted biomass (LEA) as fertilizer for mung bean crops showed improvements in plant growth and soil microbial activity.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Sanjay Kumar Gupta, Rachna, Bhaskar Singh, Arvind Kumar Mungray, Rupam Bharti, Arvind Kumar Nema, K. K. Pant, Sikandar Mulla
Summary: Xenobiotics are considered a major threat to human beings and the environment. Conventional wastewater treatment methods are ineffective in removing these contaminants, and bioelectrochemical systems (BES) offer promising potential for integrated wastewater treatment. BES utilizes the energy stored in wastes to treat them and has the advantage of simultaneously treating wastewater and producing bioenergy. Despite limitations, the global market for microbial fuel cells (a type of BES) is growing steadily.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2022)
Article
Multidisciplinary Sciences
Pranjal Singh, Manoj Datta, G. V. Ramana, Sanjay Kumar Gupta, Tabarak Malik
Summary: Field portable X-ray fluorescence (FP-XRF) has great potential as a qualitative assessment tool in geoenvironmental engineering. The identification of elevated concentrations of selected elements in various geomaterials and the ability of FP-XRF to detect variations in element concentrations in local soil demonstrate its suitability for use in geoenvironmental studies.
Article
Green & Sustainable Science & Technology
Sachitra Kumar Ratha, Nirmal Renuka, Taher Abunama, Ismail Rawat, Faizal Bux
Summary: Hydrothermal liquefaction of algal biomass is a promising technology for the production of liquid biofuels in the renewable energy sector. Recent research has focused on the effect of feedstock composition and solvents on biocrude quality and yield. Challenges associated with high N/C and O/C ratios in proteinaceous biomass-derived biocrude need to be addressed. Co-liquefaction of carbonaceous biomass and the use of solvents as reaction medium and extraction agent have shown promise in improving biocrude formation. This paper extensively reviews the effect of feedstock composition and solvents on HTL biocrude formation and discusses future perspectives and challenges.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Multidisciplinary Sciences
Maneesh Jaiswal, Sanjay Kumar Gupta, Mayuri Chabukdhara, Mahmoud Nasr, Arvind Kumar Nema, Jakir Hussain, Tabarak Malik
Summary: The study assessed the levels of heavy metals in the Yamuna River in Uttar Pradesh, India during the monsoon and non-monsoon seasons, and identified the possible sources of contamination and associated health risks. The results showed that, except for chromium, the average levels of heavy metals were within drinking water safe limits. Both natural and human factors were found to contribute to the presence of heavy metals in the river.
Article
Biotechnology & Applied Microbiology
Barkha Vaish, Vaibhav Srivastava, Umesh Kumar Singh, Sanjay Kumar Gupta, Puneet Singh Chauhan, Richa Kothari, Rajeev Pratap Singh
Summary: This study evaluates the suitability of anaerobic digestate (ADg) as a fertilizer supplement and finds that it significantly affects soil nutrients and the growth performance of brinjal (Solanum melongena L. var. Kashi Uttam). The metal contents in ADg remain within permissible limits. However, more research is needed to understand the impact of ADg on soil and plant growth, as well as its transformation during the anaerobic digestion process.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Multidisciplinary Sciences
Rajashree Bhuyan, Pinki Brahma, Mayuri Chabukdhara, Neha Tyagi, Sanjay Kumar Gupta, Tabarak Malik
Summary: This study assessed heavy metal contamination in the surface sediments of the Bharalu river in India. The concentrations of Ni, Zn, Pb, and Fe were analyzed and their levels were found to exceed the sediment quality guidelines. The pollution indices and risk assessment methods used in this study revealed a higher contamination in the downstream sites compared to the upstream site. Anthropogenic sources, such as urban discharges and waste dumping, were identified as the main contributors to metal contamination in the river sediments. These findings emphasize the need for effective river management strategies to address heavy metal pollution and protect the river ecosystem.
Review
Environmental Sciences
Himangshu Boruah, Neha Tyagi, Sanjay Kumar Gupta, Mayuri Chabukdhara, Tabarak Malik
Summary: Arsenic contamination is a global concern due to its serious health hazards caused by prolonged exposure to drinking water. Iron-oxide nanomaterials have gained attention as cost-effective and efficient adsorbents for arsenic removal. However, most research is based on laboratory findings and cannot be replicated in natural water environments. This study aims to provide a comparative analysis of arsenic removal using different iron-oxide nanomaterials and insights into future research directions.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Biotechnology & Applied Microbiology
Sung-Yeoul Kim, Vikash Chandra Roy, Jin-Seok Park, Byung-Soo Chun
Summary: This study aims to extract functional substances from Undaria pinnatiida sporophyll using supercritical carbon dioxide (SC-CO2) and subcritical water extraction (SWE). The results showed that the consecutive green extraction method can yield extracts rich in fucoxanthin and beta-carotene, and the sporophyll of Undaria pinnatiida contains health-beneficial fatty acids. Additionally, SWE can extract substances with antioxidant, antibacterial, and antihypertensive activities.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2024)