Article
Environmental Sciences
Yan Chen, Jie Chen, Rui Xia, Wenpan Li, Yuan Zhang, Kai Zhang, Shanlin Tong, Ruining Jia, Qiang Hu, Lu Wang, Xiaojiao Zhang
Summary: Rivers play a crucial role in the nutrient input to lakes and the control of river nutrients is significant in mitigating lake eutrophication. Based on a study of 1412 sampling sites in China, it is revealed that phosphorus is the key limiting factor for river nutrient balance in China's rivers.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Limnology
Sabrina N. Volponi, Heather L. Wander, David C. Richardson, Clayton J. Williams, Denise A. Bruesewitz, Shelley Arnott, Jennifer A. Brentrup, Hailee L. Edwards, Holly A. Ewing, Kristen Holeck, Lauren Johnson, Brian S. Kim, Ana M. Morales-Williams, Nisha Nadkarni, Beth C. Norman, Lianne Parmalee, Amy Shultis, Adrienne Tracy, Nicole K. Ward, Kathleen C. Weathers, Courtney R. Wigdahl-Perry, Kiyoko Yokota
Summary: The concentration of dissolved organic nitrogen (DON) is increasing in many northern hemisphere lakes, yet its use by phytoplankton and fate in the environment seldom have been quantified. We conducted 1 week, in situ, microcosm incubations across 25 lakes in northeastern North America to understand how DON, dissolved inorganic nitrogen (DIN), and dissolved inorganic phosphorus (P) affected phytoplankton biomass. Phytoplankton biomass in 80% of lakes responded similarly to DON and DIN additions. Colimitation was the most common type of nutrient limitation among the study lakes, followed by P limitation.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Limnology
Lesley B. Knoll, Benton Fry, Nicole M. Hayes, Hailey M. Sauer
Summary: This study investigated the impact of snow cover and nutrients on the growth of under-ice photoautotrophs in a lake. The results showed that both snow cover and nutrients significantly affected the chlorophyll a concentrations of photoautotrophs, with higher growth observed when snow was removed. Therefore, both light and nutrient conditions in winter may play a crucial role in under-ice photoautotroph dynamics.
LIMNOLOGY AND OCEANOGRAPHY
(2023)
Article
Ecology
Guitong Xing, Xiaofang Wang, Yamin Jiang, Huai Yang, Siwei Mai, Wenxian Xu, Enqing Hou, Xingzhao Huang, Qiu Yang, Wenjie Liu, Wenxing Long
Summary: The study found that during the process of forest succession from plantation to secondary forest and old-growth forest, soil organic carbon (SOC) increased significantly at 0-10 cm and 10-20 cm depths but not at deeper depths. The decrease in soil pH and the increase in total root biomass were the main factors contributing to SOC sequestration. Therefore, forest succession improved SOC accumulation.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2023)
Article
Engineering, Chemical
Sidra Javed, Cyrus Raza Mirza, Aqib Hassan Ali Khan, Walid Khalifa, Belkacem Achour, Rocio Barros, Sohail Yousaf, Tayyab Ashfaq Butt, Mazhar Iqbal
Summary: This study demonstrates that P-starved and acid treated biomass of Chlorella vulgaris can efficiently remove phenol and 2-chlorophenol from contaminated water, providing an economical and environmentally friendly solution.
Article
Biochemistry & Molecular Biology
Melinda Magyar, Gabor Sipka, Wenhui Han, Xingyue Li, Guangye Han, Jian-Ren Shen, Petar H. H. Lambrev, Gyozo Garab
Summary: By measuring the chlorophyll-a fluorescence transients produced by single-turnover saturating flashes, researchers identified the rate-limiting steps in the transition from dark to light of Photosystem II. They found that in samples treated with diuron, the first flash fully reduced the Q(A) quinone acceptor molecule but only generated an F-1 fluorescence transient.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Agricultural Engineering
Ruoyu Chu, Dan Hu, Liandong Zhu, Shuangxi Li, Zhihong Yin, Yunjiang Yu
Summary: The study found that using harvested water with specific nitrogen-to-phosphorus ratios can significantly affect the growth and lipid synthesis of microalgae, thus affecting the efficiency of biodiesel production.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Liuqian Yu, Jianping Gan
Summary: This study shows that the severity of phosphorus limitation can reverse its impact on coastal hypoxia. Severe phosphorus limitation reduces hypoxia, while mild phosphorus limitation amplifies hypoxia.
Article
Biotechnology & Applied Microbiology
Caroline Moco Erba Pompei, Hugo Renan Bolzani, Gustavo Henrique Ribeiro da Silva
Summary: The study evaluated the performance of using a native microalgae consortium to treat anaerobically digested sewage in lab-scale indoor and pilot-scale outdoor photobioreactors under tropical conditions. The outdoor photobioreactor had better nutrient removal efficiency (average of 85% for total nitrogen and 88% for total phosphorus) and biomass productivity (average of 31.3 mg L-1 day-1 for total suspended solids) due to better light and temperature.
JOURNAL OF APPLIED PHYCOLOGY
(2023)
Article
Environmental Sciences
Fuqiang Wang, Jiwang Tang, Zhaolei Li, Jie Xiang, Liwei Wang, Li Tian, Lifen Jiang, Yiqi Luo, Enqing Hou, Xiaoming Shao
Summary: The study revealed that climate warming had adverse effects on the growth productivity of artificial pastures in the cold Tibetan Plateau. The decrease in biomass production was primarily attributed to damages on leaf photosynthesis and the oxidative system caused by high temperatures, as well as exacerbated phosphorus limitation. Therefore, there is an urgent need to enhance agronomic techniques and cultivate more resilient forage genotypes to mitigate the impacts of climate warming on artificial pastures in the region.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Limnology
Jonathan T. Stetler, Lesley B. Knoll, Charles T. Driscoll, Kevin C. Rose
Summary: Studies have shown a linear relationship between DOC and total nitrogen and phosphorus in lakes, but total nutrients do not increase as DOC increases with browning over time. This suggests that DOC and limiting nutrients are spatially coupled but not temporally, challenging previous conceptualizations of the long-term effects of browning on productivity.
LIMNOLOGY AND OCEANOGRAPHY LETTERS
(2021)
Review
Energy & Fuels
Yingji Wu, Changlei Xia, Jiajie Cao, Hakim AL Garalleh, Mazen Garaleh, Mohammed Khouj, Arivalagan Pugazhendhi
Summary: Biofuel is a leading alternative to fossil fuels due to the depletion of energy sources. Nanoparticles acting as catalysts have shown potential in improving the quality and yield of biofuel. With improved processing, the reliance on fossil fuels can be significantly reduced. Various nanoparticles, such as organic and inorganic metals, have been applied to improve biofuel fabrication.
Article
Energy & Fuels
Byung Sun Yu, Young Joon Sung, Min Eui Hong, Sang Jun Sim
Summary: Research has shown that adding urea and KH2PO4 to the culture medium when CO2 supply is interrupted can increase biomass and lipid productivity of microalgae, preventing cell growth inhibition.
Article
Engineering, Environmental
Yongxiu Chen, Julian Key, Kieran O'Regan, Tengfei Song, Yongsheng Han, Emma Kendrick
Summary: A methodology based on the galvanic intermittent titration technique has been developed to investigate the diffusion and reaction kinetics of lithium-ion battery electrodes, revealing that the graphite electrode limits the performance of the full cell at high rates and high mass loadings.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Green & Sustainable Science & Technology
Laura Velez-Landa, Hector Ricardo Hernandez-De Leon, Yolanda Del Carmen Perez-Luna, Sabino Velazquez-Trujillo, Joel Moreira-Acosta, Roberto Berrones-Hernandez, Yazmin Sanchez-Roque
Summary: This study evaluated Verrucodesmus verrucosus as a source of oil for biodiesel production, finding that the best conditions for lipid accumulation were a photoperiod of 12 light hours and 12 dark hours with BG11 medium in a 3 L tubular photobioreactor with 0.3% CO2, 25 degrees C and 2000 Lux, resulting in a lipid accumulation of 50.42%. Palmitic acid was identified as the most abundant fatty acid at 44.90% of the total lipids.
Article
Agricultural Engineering
Menghour Huy, Gopalakrishnan Kumar, Hyun-Woo Kim, Sang-Hyoun Kim
BIORESOURCE TECHNOLOGY
(2018)
Article
Engineering, Civil
Ji Won Na, Jae-Cheol Lee, Hyun-Woo Kim
KSCE JOURNAL OF CIVIL ENGINEERING
(2019)
Article
Engineering, Environmental
Hee Seo Seo, Jun-Hyeong Park, KyeongMok Kim, Tak-Hyun Kim, Hyun Woo Kim, Youn-Suk Son
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Engineering, Environmental
Hee-Jun Kim, Donggwan Lee, Chan-Hee Won, Hyun-Woo Kim
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
(2020)
Article
Environmental Sciences
Hee-Jun Kim, Gui-Sook Nam, Jung-Seok Jang, Chan-Hee Won, Hyun-Woo Kim
Article
Agricultural Engineering
Jae-Cheol Lee, Boreum Lee, Juheon Heo, Hyun-Woo Kim, Hankwon Lim
BIORESOURCE TECHNOLOGY
(2019)
Article
Engineering, Chemical
Hyun-Woo Kim, Seong Hwan Hong, Hyeoksun Choi
Article
Engineering, Environmental
Rumi Park, Jong-Guk Kim, Hyun-Woo Kim
Summary: This study presents a mathematical model explaining the simultaneous removal of microalgae and their toxins using non-thermal plasma (NTP), with experimental results showing up to 77% reduction in extracellular MCs after 24 hours of NTP treatment. Regression analysis based on experimental data reveals degradation and release rates of MCs, providing essential information on intracellular MCs release by microalgal cell destruction. Simulation results aid in developing safe and effective control over the treatment of harvested microalgal biomass and toxins.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Hee-Jun Kim, Chan-Hee Won, Hyun-Woo Kim
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2020)
Article
Environmental Sciences
Jae-Cheol Lee, Jae Kyung Jang, Hyun-Woo Kim
Article
Engineering, Environmental
Hyeonmin An, Jae-Cheol Lee, Rumi Park, Hyun-Woo Kim
Summary: A physicochemical process combining microfiltration (MF) and cold plasma (CP) has been proposed for efficient management of high-strength livestock urine and manure (LUM), demonstrating improved removal efficiencies of various pollutants and reduced membrane resistance under shorter hydraulic retention time (HRT). Such technical convergence presents a cost-effective and environmentally friendly strategy for advanced treatment of LUM.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Chemical
Hyun-Woo Kim, Seong Hwan Hong, Hyeoksun Choi
Article
Environmental Sciences
Jae-Cheol Lee, Rumi Park, Kyu Seon Yoo, Hyun-Woo Kim
Summary: This study suggests a synergistic system coupling cold plasma and membrane photobioreactor for treating high-turbidity livestock excrements. The integrated system effectively decomposes turbidity and TSS, with microalgal growth directly correlated to these parameters. The role of cold plasma is crucial in achieving the treatment goal for livestock excrements.
Article
Biochemistry & Molecular Biology
Hee-Jun Kim, Uje Lee, Hyun-Woo Kim, Min Cho, Jaewoo Lee
Summary: This study demonstrates that cold plasma treatment can achieve zero discharge of dyes and regeneration of washing solutions, contributing to environmentally friendly and sustainable dye removal.
Article
Environmental Sciences
Dharma Raj Kandel, Hee-Jun Kim, Jeong-Muk Lim, Milan Babu Poudel, Min Cho, Hyun-Woo Kim, Byung-Taek Oh, Changwoon Nah, Seung Hee Lee, Bipeen Dahal, Jaewoo Lee
Summary: This study successfully regenerated carbonized rice husk as an adsorbent using cold plasma treatment, achieving low material consumption and low energy consumption, while maintaining moderate adsorption efficiency. The regeneration capability is related to the remediation of adsorption sites, and the power consumption of CP treatment is low.