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Keywords = soil alkalisation

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13 pages, 618 KB  
Article
CO2 Emission from Soils Under the Influence of Calcium Carbonate Addition and Polymer Superabsorbent Application
by Katarzyna Sroka, Paweł Sroka, Luis Santos and Cecilia Baptista
Appl. Sci. 2025, 15(23), 12708; https://doi.org/10.3390/app152312708 - 1 Dec 2025
Viewed by 421
Abstract
Superabsorbents are crosslinked polymer networks composed of ionic and non-ionic monomers. Among these, polyacrylates are notable for their capacity to absorb and retain water solutions amounting to several hundred times their own weight. These superabsorbents serve various purposes, particularly in agriculture, where they [...] Read more.
Superabsorbents are crosslinked polymer networks composed of ionic and non-ionic monomers. Among these, polyacrylates are notable for their capacity to absorb and retain water solutions amounting to several hundred times their own weight. These superabsorbents serve various purposes, particularly in agriculture, where they are employed as soil additives to enhance physical properties and improve moisture retention. Soil respiration is a critical metric that measures the rate of organic matter decomposition and carbon cycling within the soil, both of which are vital for ecosystem functionality. Consequently, assessing the base respiration rate is one of the most prevalent microbiological analyses conducted to evaluate soil quality. This process involves quantifying the amount of carbon dioxide (CO2) released from a soil sample over a specified duration. This study demonstrates that the incorporation of polyacrylates into sandy soils, in conjunction with calcium carbonate, results in increased carbon dioxide emissions and a significant elevation in soil pH. Such alkalinization may adversely affect the health of cultivated plants, underscoring the need for careful consideration in soil management practices. In acidic loam/silt loam soils, PAA addition did not further increase CO2 emissions or pH beyond liming alone, whereas in neutral sandy soil, the combination caused a strong CO2 flush and marked alkalisation. Full article
(This article belongs to the Section Environmental Sciences)
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15 pages, 3250 KB  
Article
Dynamics of Changes in Selected Soil Traits in the Profiles of Arable Soils Anthropogenically Alkalised by the Cement and Lime Industry within the Kielecko-Łagowski Vale (Poland)
by Anna Świercz, Agnieszka Gandzel and Ilona Tomczyk-Wydrych
Land 2021, 10(1), 84; https://doi.org/10.3390/land10010084 - 18 Jan 2021
Cited by 6 | Viewed by 2671
Abstract
This study presents the influence of the cement and lime industry on the physical and chemical properties of arable soils. In spite of using modern forms of environmental protection against dust emissions, this type of industry causes unfavourable phenomenon of excessive alkalisation of [...] Read more.
This study presents the influence of the cement and lime industry on the physical and chemical properties of arable soils. In spite of using modern forms of environmental protection against dust emissions, this type of industry causes unfavourable phenomenon of excessive alkalisation of soil. This process is relatively rare in Poland. However, in the Świętokrzyskie Province, it has been responsible for the largest transformation of soils in recent years. The analysis included soil samples taken from five profiles located in the vicinity of Dyckerhoff Polska Sp. z o.o. Nowiny Cement Plant. The study results obtained in 2019 were compared with those obtained in 1978 and 2005. The most attention was paid to soil pH; CaCO3 content; organic carbon and nitrogen content; concentrations of available components such as P2O5, K2O and Mg; and the saturation level of sorption complex with alkaline cations. It was found that long-term imission of pollutants caused significant changes in the basic soil properties, which remain in soils despite the evident decrease in the cement-lime dust emission. These include high pH values, excessive CaCO3 content, high soil saturation with alkaline cations and decreases in total carbon content, which were especially visible in soil humus horizons. Full article
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