Inhibition of in situ coating of sediment ceramsite on sediment nutrient release of eutrophic lakes
- PDF / 2,898,133 Bytes
- 15 Pages / 547.087 x 737.008 pts Page_size
- 83 Downloads / 202 Views
(0123456789().,-volV) ( 01234567 89().,-volV)
ORIGINAL PAPER
Inhibition of in situ coating of sediment ceramsite on sediment nutrient release of eutrophic lakes Wenguang Luo
. Jing Lu
Received: 9 January 2020 / Accepted: 9 September 2020 Ó Springer Nature B.V. 2020
Abstract Based on the main components in the residual soil to meet the characteristics of ceramic grain production raw materials, and combining with the principle of anti-filter layer technology for seepage control of hydraulic buildings, a lead wire cage filled with silt grains made from lake dehydration silt can be obtained. Moreover, the same-position treatment method of bed surface is desilted by this kind of ceramic lead wire cage in a reasonable structural form to improve water environment. In order to investigate the inhibition effect of this method on sediment resuspension, the effect law on water quality and the growth of indigenous microorganisms, 25 experimental groups were constructed to simulate 5 flow patterns of eutrophic lakes in this paper. We can analyze the inhibition effect of ceramic lead wire cage on sediment resuspension by monitoring the change of suspended matter content, monitoring the concentration change of ammonia nitrogen and soluble phosphorus can show the effect of ceramic lead cage on water quality, and monitoring the dissolved oxygen content can indirectly reflect the effect of the growth of indigenous microorganisms to some extent. The results show that in a certain flow mode, the ceramic lead wire cage can effectively inhibit the resuspension
W. Luo (&) J. Lu State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, Hubei, China e-mail: [email protected]
of the sediments, prevent the release of nitrogen and phosphorus nutrients in the sediments, and promote the growth of microbial attachment. The research results will maximize the benefits of the utilization of silt resources, and will optimize the in situ repair methods, and have broad application prospects. Keywords Sediment ceramic grains Lead wire cages of ceramic grains Resuspension of sediments Nutrient release Eutrophic lakes
Introduction Pollutants from industry, agriculture and surface runoff have caused varying degrees of contamination of water sediments. Many results have shown that the content of nutrient salts, toxic chemicals and toxic strains in the sediments is much higher than that of the upper water body. And contaminated mud has posed a worldwide threat to human health and the environment (Xu et al. 2015). In its 1998 survey, the EPA noted that there had been 2100 fish consumption problems in the USA, and that pollution had been repeatedly confirmed to be from the mud (Abiad et al. 2020). Therefore, it is necessary to deal with the contaminated silt, and the treatment of the soiled silt in the river and lake is mainly physical, chemical and biological. Because the chemical method is harmful
123
Environ Geochem Health
and the biological method is slow, the best timesensitive method
Data Loading...
