Three kinds of active thin-layer capping materials for reducing the phosphorus load in eutrophic water body: comparison in dynamic experiment

An investigation of phytoplankton community and water quality for M River was conducted in December 2019.The results showed that 38 species of phytoplankton belonging to 6 phyla and 26 genera were collected. Among them, Bacillariophyta is the richest species, which accounted for 34.21%, followed by Cyanophyta with 26.32% and Chlorophyta with 28.95%. The density of phytoplankton was 63.0*106 inds/L which indicated as eutrophic water body. The highest density was Bacillariophyta, accounting for 51.03%. The Shannon-Wiener diversity index (H’) varied from 1.34 to 2.24, the Margalef Species diversity index (d) varied from 2.71 to 3.85, and the Pielou evenness index (J) varied from 0.38 to 0.67. According to the integrative analysis results of H’, d and J, M River water quality belongs to oligo-polluted, but individual sites belong to meso-polluted.

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Combined effects of submerged macrophytes and aquatic animals on the restoration of a eutrophic water body—A case study of Gonghu Bay, Lake Taihu

Ecological Engineering ◽

10.1016/j.ecoleng.2017.01.013 ◽

2017 ◽

Vol 102 ◽

pp. 15-23 ◽

Cited By ~ 26

Author(s):

Hailong Gao ◽

Xin Qian ◽

Hongfei Wu ◽

Huiming Li ◽

Hui Pan ◽

...

Keyword(s):

Water Body ◽

Submerged Macrophytes ◽

Lake Taihu ◽

Combined Effects ◽

Aquatic Animals ◽

Eutrophic Water

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PARASITOCENOSES OF FISH IN RIVERS AND RESERVOIRS OF THE RYAZAN REGION

10.31016/978-5-6046256-1-3.2021.22.394-400 ◽

2021 ◽

pp. 394-400

Author(s):

A. Novak ◽

M. Novak

Keyword(s):

Water Body ◽

Higher Plants ◽

Wide Distribution ◽

Biological Cycle ◽

Opisthorchis Felineus ◽

Endemic Focus ◽

Eutrophic Water ◽

Pra River ◽

Tylodelphys Clavata ◽

Rivers And Reservoirs

The wide distribution of trematodes and other helminths with a complex biological cycle in the reservoirs of the Ryazan Region indicates an increase in the level of their eutrophication. We performed a complete helminthological study of the ide (25 copies), roach (21 copies), and perch (29 copies) according to K.I. Skryabin. Taking into account complex hydrological indicators (species composition of higher plants, microphytes, fauna of hydrobionts and their parasites), the Pra River is a dystrophic water body, the Pronya River is an eutrophic water body, and the Novomichurinsk Reservoir is a hypertrophic water body. Parasites of Pra River were represented by nine species, the Pronya River by four species, and the Novomichurinsky Reservoir by six species. Trematodes dominate in all reservoirs of the Ryazan Region. We found an endemic focus of opisthorchiasis in the Pra River where the infection of the ide with metacercarias Opisthorchis felineus reaches 38–50% with an invasion intensity of up to 70 specimens. A number of species of trematodes (Ichthyocotylurus spp., Paracoenogonimus ovatus, Diplostomum spp., Posthodiplostomum spp., Tylodelphys clavata) and cestodes (Ligula intestinalis) should be considered as indicators for assessing an increase in concentration of dissolved biogenic substances in the water bodies. There is a direct correlation between the infection of fish with the above species of trematodes and cestodes (tapeworms) being indicators of the invasion intensity and the degree of eutrophication of the reservoirs.

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Water Solubility Enhancement of DDT by Humic Acid and Extracellular Organic Matter of Aquatic Algae

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.518-523.565 ◽

2012 ◽

Vol 518-523 ◽

pp. 565-568 ◽

Cited By ~ 2

Author(s):

Hua Ma ◽

Fu Yi Cui ◽

Zhi Wei Zhao ◽

Zhi Quan Liu ◽

Dong Mei Liu

Keyword(s):

Organic Matter ◽

Humic Acid ◽

Water Body ◽

Sampling Method ◽

Water Solubility ◽

Solubility Enhancement ◽

Absorption Coefficients ◽

Solution Ph ◽

Eutrophic Water ◽

Extracellular Organic Matter

The water solubility enhancement of 2,4´-DDT and 4,4´-DDT by humic acid and extracellular organic matter released from Microcystis aeruginosa was investigated by a ingenious sampling method and increasing apparent solute solubilities. Water solubility enhancements of the two DDT isomerizes by both humic acid and extracellular organic matter at the solution pH 7-11, and their solubilities increased with the increase of pH. Absorption coefficients Ciw (2,4´-DDT and 4,4´-DDT) increased with the increase of pH for HA and EOM, but Ciw for EOM are about two times than for HA at same TOC concentrations. The results suggested that more attentions should be paid to the enhancement of organic chemicals by EOM, especially in eutrophic water body where an increasing algae population usually appears, and the enhancement of DDT solubility by EOM may increase the risk of pesticide residues to organisms.

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Removal Properties of Nitrogen and Phosphorous in Eutrophic Water with Periphyton Attached by Artificial Substrate

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.340.480 ◽

2011 ◽

Vol 340 ◽

pp. 480-486

Author(s):

Ding Long Li ◽

Hong Lu ◽

Qian Chen ◽

Jian Ying Chao ◽

Xiang Ji Kong ◽

...

Keyword(s):

Water Depth ◽

Water Body ◽

Removal Rate ◽

Chemical Properties ◽

Water Velocity ◽

New Thought ◽

Chl A ◽

Eutrophic Water ◽

Nitrogen Nutrients ◽

Depth Water

Removal properties are researched and discussed of algae and nitrogen & phosphorus nutrients with periphyton by assembled substrate in lake-based eutrophic water body, including impacts on removal effects of several physical & chemical properties as water depth, water velocity, DO, temperature and PH. The results show that: the removal rate of NH4-N, other nitrogen nutrients, phosphorus nutrients and Chl-a were 96%, 40%, 80%, 65% respectively. With the growth of water velocity(from 0 to 200L/h ), the removal of Chl-a, TP, TDP increased to a certain extent（Chl-a: from 63.63% to 67.66%; TP:from 76.15% to 85.13%;TDP:from 80.10% to 88.44%）,and that of TN,TDN and NO3-N decreased to different extents（TN: from 45.19% to 31.97%; TDN: from 42.81% to 28.77%; NO3-N: from 38.11% to –5.26%）, but that of NH4-N and PO4-P altered little(NH4-N：from 96.80% to 95.94%；PO4-P：from 85.38% to 87.02%). It will provide reference for recovery and re-contribution of destroyed Eco-system, and a new thought for treatment in eutrophical lakes.

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