Assessment of heavy metal accumulation potential of aquatic plants for bioindication and bioremediation of aquatic environment

Petrov, Denis; Korotaeva, Anna E.; Пашкевич, М. А.; Chukaeva, M. A.

doi:10.1007/s10661-022-10750-0

Cited by 10 publications

(2 citation statements)

References 32 publications

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“…P. australis , A. calamus and T. latifolia are three common emergent vegetation species in rivers, marshes and coastal regions (Hauber et al., 2011; Li & Guo, 2017; Petrov et al., 2023). Plastic models were constructed with morphologies similar to each species and geometrically scaled to fit the flume (Figures 1b–1d).…”

Section: Methodsmentioning

confidence: 99%

Plant Morphology Impacts Bedload Sediment Transport

Liu,

Shan,

et al. 2024

Geophysical Research Letters

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Bedload sediment transport plays an important role in the evolution of rivers, marshes and deltas. In these aquatic environments, vegetation is widespread, and plant species have unique morphology. However, the impact of real plant morphology on flow and sediment transport has not been quantified. This study used model plants with real plant morphology, based on the aquatic species Phragmites australis, Acorus calamus and Typha latifolia. The frontal area of these species increases away from the bed, which leads to higher near‐bed velocity than would be predicted from depth‐average frontal area. A plant morphology coefficient was defined to quantify the impact of vertically‐varied plant frontal area. Laboratory experiments confirmed that the plant morphology coefficient improved the prediction of near‐bed velocity, near‐bed turbulent kinetic energy and bedload transport rate in canopies with realistic morphology. Plant morphology can alter transport rates by up to an order of magnitude, relative to the assumption of uniform morphology.

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Section: Methodsmentioning

confidence: 99%

Plant Morphology Impacts Bedload Sediment Transport

Liu,

Shan,

et al. 2024

Geophysical Research Letters

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“…Rapeseed oil is an acceptable biodiesel feedstock for the Russian market due to its high production volume and low domestic consumption [28,29]. Alkaline transesterification and acid esterification in the presence of a molar excess of methanol or ethanol remain the most common methods for processing these materials [27,30,31].…”

Section: Introductionmentioning

confidence: 99%

The Physicochemical Basis for the Production of Rapeseed Oil Fatty Acid Esters in a Plug Flow Reactor

Kosolapova,

Smal,

Pyagay

et al. 2024

Processes

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This article describes the results of a comprehensive comparative study of the production of fatty acid ethyl esters (FAEEs) for use as biodiesel in perfect mixing reactors (PMRs) and plug flow reactors (PFRs). The products obtained on a laboratory scale at all stages of the separation and purification of the FAEE phase were analyzed using the FTIR, XRF and GC-MS methods. We compared distillation methods for the separation of stoichiometrically excessive ethanol from the reaction mixture. Neutralization methods with H2SO4 solution and carbonation with CO2 were applied for FAEE phase purification from the catalyst. Emulsions formed during the water flushing stage were analyzed via the optical microscopy method. The optimal conditions of stirring speed and temperature were selected to maintain a high level of FAEE–water phase contact area with minimum phase separation time. The efficiency of the carbonation method for catalyst neutralization in the FAEE phase has been proven, allowing us to consider this method as an alternative to the traditional acid neutralization method. According to the results of experimental studies, we have developed a new high-performance technological scheme for the production of fatty acid esters in PFRs. The synthesis of FAEEs in a stoichiometric excess of ethanol of about 1:50 allowed us to increase the reaction rate and productivity of the synthesis unit after the transition from a PMR to a PFR. The yield of the product amounted to 86.7%. The purified FAEE fraction complied with most EN14214 specifications.

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