Sorption properties of granulometric fractions in Haplic Cambisol developed from boulder loam

Abstract

The aim of the paper was to investigate the sorption properties of granulometric fractions separated from the genetic horizons of arable Haplic Cambisol developed from boulder loams of the Middle-Polish (Riss) Glaciation, Wartanian Stadial (central Poland). Separation of granulometric fractions was made with application of the Atterberg method without the use of centrifuging and dispersing agents. The cation exchange capacity average value in cmol(+)kg−1 and % contribution in particular fractions reached: 1–0.1 mm – 2.1 (1.6%), 0.1–0.05 mm – 5.5 (4.0%), 0.05–0.02 mm – 8.5 (6.1%), 0.02–0.01 mm – 13.0 (10.1%), 0.01–0.005 mm – 16.1 (12.8%), 0.005–0.002 mm – 28.6 (20.5%) and fraction <0.002 mm – 48.7 (44.9%). Leaching of the total exchangeable bases was the largest in the 0.1–0.05 mm fraction and decreased successively with decreasing grain diameter. Sorption properties of the tested soil determine its high agricultural value and buffer properties. The cation exchange capacity of the recognised granulometric fractions successively increased with decrease of their diameter while leaching process intensity in individual fractions decreased gradually as their dimensions decreased. Calcium was the most leached cation, followed by magnesium and sodium, whereas potassium was not leached at all. Significant increase of the cation exchange capacity in fractions from carbonate horizons was mostly caused by the increased contribution of calcium, which could be released from carbonates during extraction of bases.

Chemical properties of Technosols in post-mining areas of the Konin–Turek lignite basin in Poland

“…10B, particularly in subhorizon Ap1 increased from 85% in the soil of the 0NPK variant to 87.2% in 2NPK. This may have been caused by partial extraction of calcium from carbonates during assays of basic cations (Brogowski and Chojnicki, 2019). Those authors extensively described the role of calcium in the modification of CEC in arable soils developing from glacial tills.…”

The Effects of Different Soil Component Couplings on the Methylation and Bioavailability of Mercury in Soil

“…Studies have shown that the formation of soil organic and inorganic complex can promote the formation of soil aggregates, make soil become soft without agglomeration, and change the physical and chemical properties of soil. In addition, the physical migration of organic and inorganic complex in soil causes the redistribution of soil materials, affecting the adsorption of metals on soil particles of different particle sizes [31][32][33]. However, previous studies on the effects of soil components on mercury biogeochemical behavior were mainly conducted from the perspective of individual components, with little attention paid to the interactions among several individuals factors of various components [34][35][36][37][38][39][40][41][42][43][44].…”