Cross-linked polyacrylates in post-mining substrates:

persistence and effects on plant growth (original) (raw)

Rodionov, A.; Nii-Annang, S.; Fischer, T.; Gattinger, A.; Bens, O.; Raab, T. and Hüttl, R. F. (2014) Cross-linked polyacrylates in post-mining substrates: persistence and effects on plant growth.Soil Use and Management. DOI: 10.1111/sum.12103, , - .

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Document available online at: DOI: 10.1111/sum.12103

Summary in the original language of the document

Application of hydrophilic polymers composed of cross-linked polyacrylate can improve soil water-holding capacity and accelerate the restoration of post-mining substrates. In this work, we studied the persistence of a polyacrylate polymer incorporated into a soil and its impact on plant nutrients at a reclamation site of former lignite mining in Lusatia (Germany). In contrast to autumn application, the incorporation of the polymer enhanced the sequestration of plant-derived carbon in the soil, which was reflected by a significant increase in the concentration of a lignin marker. Attenuated total reflexion–Fourier transform infrared spectra (ATR-FTIR) and total elemental contents in the applied polymer suggested an intensive cation exchange between the polymer framework and the soil-forming substrate. In addition, there was an enrichment of carbonaceous material, which seems to reduce the swelling and thus the water-holding capacity of the cross-linked polyacrylate. Conversely, this process protected the polymer structure from rapid decomposition.

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