Thermodynamic Evaluation of the Impact of Strongly Swelling Polymer Hydrogels with Ionic Silver on the Water Retention Capacity of Sandy Substrateстатья

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Дата последнего поиска статьи во внешних источниках: 12 июля 2017 г.

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1. Полный текст статья Smagin_2017_IOP_Conf.Earth_Environ._Sci_52_012087.pdf 787,5 КБ 17 февраля 2017 [ASmagin]

[1] Smagin A. V. Thermodynamic evaluation of the impact of strongly swelling polymer hydrogels with ionic silver on the water retention capacity of sandy substrate // IOP Conference Series: Earth and Environmental Science. — 2017. — Vol. 52, no. 012087. — P. 1–7. The impact of two types of strongly swelling polymer hydrogel (SSPH) on the water retention capacity of quartz sand in pure water and Ag+ solutions (10-100 mg/l) has been studied by using a centrifugation method in a wide range of thermodynamic water potential (Gibbs energy) from 0 to 3030 J/kg. The experimental data for the water retention curves (WRC) were estimated by the van Genuchten model. Both hydrogels – the Aquasorb preparation (Germany) with hydrophilic properties and high degree of swelling in pure water (700–1000 g Н2O/g) and the new Russian amphiphilic SSPH with a peat filler (degree of swelling 500-700 g Н2O/g) were very effective as water adsorbing soil conditioners in relatively small doses from 0.05 to 0.3% per mass of dry (105oC) soil substrate. The water retention capacity of sandy substrate increases under the influence of SSPH with 2-3 times up to the level of native loamy sands and loams. Adding Ag+ to the water solution results just for the highest concentration of SSPH (0.3%) and iconic silver (100 mg/l) in a significant decrease of the water retention in the soil-gel compositions. [ DOI ]

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