Publications by authors named "Fenli Min"
Bioremediation of trichloroethene (TCE)-contaminated sites often leads to groundwater acidification, while nitrate-polluted sites tend to generate alkalization. TCE and nitrate often coexist at contaminated sites; however, the pH variation caused by nitrate self-alkalization and TCE self-acidification and how these processes affect nitrate reduction and reductive dichlorination, have not been studied. This study investigated the interaction between nitrate and TCE, two common groundwater co-contaminants, during bioreduction in serum bottles containing synthetic mineral salt media and microbial consortia.
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- The study analyzed samples from the Yangtze River, Han River, and Liangzi Lake in Wuhan to investigate how disinfection by-products (DBPs) form from chlorine residues in drinking water.
- The primary DBPs found were trichloromethane (TCM) and trichloroacetic acid (TCAA), with their concentrations influenced by factors like pH, ammonia nitrogen, and oxidative substances.
- Findings showed that increased chlorine (NaClO) levels and longer reaction times led to higher DBP concentrations, while certain elements like bromine and temperature specifically impacted TCM and TCAA formation, respectively.
To reveal the characteristics and key impact factors of phytoplankton communities in different types of lakes, sampling surveys for phytoplankton and water quality parameters were conducted at 174 sampling sites in a total of 24 lakes covering urban, countryside, and ecological conservation areas of Wuhan in spring, summer, autumn, and winter 2018. The results showed that a total of 365 species of phytoplankton from nine phyla and 159 genera were identified in the three types of lakes. The main species were green algae, cyanobacteria, and diatoms, accounting for 55.
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- The study examines the impact of aluminum (Al) input from human activities on sediment in two eutrophic lakes in China, focusing on Al migration patterns and its relationship with sediment nutrients.
- The research found significant variations in Al content in sediments, with higher concentrations in more disturbed lake areas, and overall Al levels ranging from 0.463 to 40.442 g/kg in the lakes studied.
- Additionally, the study highlights that sediment characteristics, including total nitrogen and phosphorus, influence the distribution of Al, providing valuable insights for assessing Al-related risks in aquatic ecosystems.
Sediment phosphorus (P) removal is crucial for the control of eutrophication, and the in-situ adsorption is an essential technique. In this study, modified maifanite (MMF) prepared by acidification, alkalization, salinization, calcination and combined modifications, respectively, were first applied to treat sediment P. The morphology and microstructure of MMF samples were characterized by X-ray fluorescence (XRF), Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscope (SEM) and Brunauer-Emmett-Teller (BET).
View Article and Find Full Text PDFAluminate flocculants are employed widely in water treatment for precipitating suspended solids and emergency treatment of algal blooms in eutrophic lake, but the residual aluminum (Al) may have phytotoxic effects on aquatic organisms after entering aquatic ecosystems. To elucidate the potential impacts of Al on turion germination and early growth in Potamogeton crispus, we conducted a mesocosm experiment using five Al concentrations (0 (control group), 0.3, 0.
View Article and Find Full Text PDFGrass carp can weaken the growth and reproductive capacity of submerged macrophytes by consuming valuable tissues, but factors affecting palatability of submerged macrophytes for grass carp rarely are considered. In this study, relative consumption rate of grass carp with regard to submerged macrophytes was in the following order: Hydrilla verticillata > Vallisneria natans > Ceratophyllum demersum > Myriophyllum spicatum. Firmness of macrophytes was in the following order: M.
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- Aluminate, commonly used as a flocculant in water treatment, can harm aquatic plants when residual aluminum accumulates past safe levels.
- In studies conducted in West Lake, Hangzhou, the submerged plants Vallisneria natans and Hydrilla verticillata showed inhibited growth near areas with higher aluminum concentrations.
- The results indicated significant stress in these plants, evidenced by changes in physiological parameters and higher accumulation of aluminum in their tissues, highlighting the need to manage aluminum levels to protect aquatic ecosystems.