Temat: hydraulic regime - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Fate and Transfer of Heavy Metals in Constructed Wetland Mesocosms Subjected Different Hydraulic Regime
Autorzy:: Mohammed, Alya A.
Al Chalabi, Ahmed S.
Sahei, Angham O.
Powiązania:: https://bibliotekanauki.pl/articles/2202285.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: constructed wetland
ferric dewatered sludge
heavy metals
hydraulic regime
plant
Opis:: A constructed wetland may consume different levels of pollution in different types of wastewater. The focus of this study was the removal of heavy metals (Pb, Cr, and Cd) by plants and their fate in constructed wetland mesocosms. With hydraulic regime manipulation, heavy metals were retained in the ferric dewatered sludge either by adsorption to the carboxylate groups and iron oxy-hydroxide under anaerobic conditions or by co-precipitation with iron oxy-hydroxide under aerobic conditions. Under anaerobic conditions, most heavy metals accumulate in the bottom layer and decrease when moving to the top one. In turn, under aerobic conditions, most of the heavy metals accumulate in the bottom and top layers. Plants play a minor role in heavy metal removal. About 16% of total heavy metals added to the ferric dewatered treatment sludge were taken up by plants. Roots accumulated roughly 64% of the total lead take up by plants, 66% of the chromium, and 63% of the cadmium, respectively, and passed 36%, 34%, and 37% of the aboveground tissues for harvesting. As a conclusion of this study, when constructed wetland is used, the role of hydraulic regime, substance used, and vegetation should not be ignored in the process of wastewater purification in constructed wetland.
Źródło:: Journal of Ecological Engineering; 2022, 23, 12; 44--49
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Groundwater extraction control for protecting the water works in Łobodno (SW Poland) against contamination with nitrates
Autorzy:: Mizera, J.
Malina, G.
Powiązania:: https://bibliotekanauki.pl/articles/2063032.pdf
Data publikacji:: 2010
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: nitrates (NO3-)
groundwater
extraction regime
water works protection
hydraulic control
Opis:: The main goal of this research was to reverse, or at least stop the trend of a constant increase of nitrate ions (NO3–) concentrations in the recharge areas and water extracted by the water works in Łobodno using specifically designed water extraction regime. To find an effective extraction regime, fifteen operation variants with diverse overall and specific well discharge rates were designed and tested. They assured the lowest possible concentrations in the delivered water, or the highest amounts (loads) of NO3– leached out the aquifer, keeping concentrations in the extracted water below the permissible value. The most effective variants at current water demands were these with the reduced discharge rates of wells nos. 3 and 8 (variants 13 and 14). Groundwater extraction according to other variants would be possible as water demands increase, or after the permanent reduction of NO3– concentrations in the water extracted by wells nos. 3 and 8. Effective control of the extraction regime will allow for the reduction of NO3– concentrations in the extracted water and loads in the aquifer, and consequently for delaying or eliminating the need for treatment (a NO3– removal installation) to be applied at the water works in Łobodno.
Źródło:: Biuletyn Państwowego Instytutu Geologicznego; 2010, 441 Hydrogeologia z. 10; 101--106
0867-6143
Pojawia się w:: Biuletyn Państwowego Instytutu Geologicznego
Dostawca treści:: Biblioteka Nauki