The deposited dataset was collected as part of the research project “Wpływ biowęgla wzbogaconego mikrobiologicznie na właściwości fizykochemiczne i biologiczne agregatów glebowych – badania modelowe” (“The influence of microbiologically enriched biochars on the physicochemical and biological properties of soil aggregates – model studies”), funded by the National Science Centre, Poland, under the SONATA 17 program (project no. 2021/43/D/ST10/01656). The project is based on model aggregates prepared from biochar and biochar enriched with microorganisms (Trichoderma), mixed with soils of different texture classes and physicochemical characteristics. The research covers bulk density, aggregate structure and pore characteristics, water and mechanical stability of aggregates, wettability, microbial activity, as well as a range of other physicochemical and biological parameters.
The study was carried out between August 2024 and May 2025 at the Institute of Agrophysics, Polish Academy of Sciences, in Lublin.
The dataset contains results for three degraded soils, biochars produced from post-fermentation sludge at different pyrolysis temperatures, and mixtures of soils with biochar at various proportions. The deposited data include water vapor adsorption isotherms, water destruction curves, adsorption energy, air release during aggregate decomposition, ash content, cation exchange capacity, contact angle, destruction time, soil granulometric composition, organic carbon content, pH, specific surface area, total porosity, water drop penetration time, and dissolved organic matter content.
The dataset consists of the following files:
- A_1 – Data of water vapor adsorption isotherms for soils (Abruptic Luvisol (A), Brunic Arenosol (B), Haplic Chernozem (D)), biochars produced from post-fermentation sludge at three temperatures (300, 450, 600 °C), and mixtures of soils with biochar at different proportions (0.2, 0.5, 1, 1.5, 3, 5%).
- A_2 – Data of water destruction curves for soils (A, B, D) and soil–biochar mixtures at different proportions (0.2, 0.5, 1, 1.5, 3, 5%).
- A_3 – Adsorption energy (E) data for soils (A, B, D), biochars (300, 450, 600 °C), and soil–biochar mixtures at different proportions (0.2, 0.5, 1, 1.5, 3, 5%).
- A_4 – Air release during aggregate decomposition for soils (A, B, D) and soil–biochar mixtures at different proportions (0.2, 0.5, 1, 1.5, 3, 5%).
- A_5 – Ash content of biochars produced from post-fermentation sludge at three temperatures (300, 450, 600 °C).
- A_6 – Cation exchange capacity (CEC) for soils (A, B, D) and biochars (300, 450, 600 °C).
- A_7 – Contact angle (α) for soils (A, B, D), biochars (300, 450, 600 °C), and soil–biochar mixtures at different proportions (0.2, 0.5, 1, 1.5, 3, 5%).
- A_8 – Destruction time (Tdestr) for soils (A, B, D) and soil–biochar mixtures at different proportions (0.2, 0.5, 1, 1.5, 3, 5%).
- A_9 – Granulometric composition of soils (A, B, D).
- A_10 – Organic carbon content (Corg) of soils (A, B, D).
- A_11 – pH of soils (A, B, D).
- A_12 – Specific surface area (SSA) for soils (A, B, D), biochars (300, 450, 600 °C), and soil–biochar mixtures at different proportions (0.2, 0.5, 1, 1.5, 3, 5%).
- A_13 – Total porosity (Pc) of soils (A, B, D).
- A_14 – Water drop penetration time (WDPT) for soils (A, B, D) and soil–biochar mixtures at different proportions (0.2, 0.5, 1, 1.5, 3, 5%).
- A_15 – Dissolved organic matter (DOM) content of biochars produced from post-fermentation sludge at three temperatures (300, 450, 600 °C).
Summary of methods and equipment used:
· A_1, A_3, A_12 - Vacuum Dryer OV-12 (Jeio Tech, Republic of Korea); Vacuum Dryer DZ-2BC (Chemland, Poland).
· A_2, A_4, A_8, A_14 - EXPLORER® ANALYTICAL EX324M balance (OHAUS, Parsippany, NJ, USA).
· A_5 - Muffle furnace FCF 12 SP (Czylok, Poland).
· A_6 - Soils: indirect method; Biochars: surface charge at pH 7 by potentiometric titration (702 SM Titrino, Metrohm, Switzerland).
· A_7 - Drop Shape Analyzer DSA 100 (KRÜSS, Germany).
· A_9 - Aerometric method.
· A_10 - Dichromate oxidation.
· A_11 - CX-505 digital pH meter (Elmetron, Poland).
· A_13 - Autopore IV 9500 porosimeter (Micromeritics, Norcross, GA, USA).
· A_15 - TOC MULTI N/C 2000 carbon and nitrogen analyzer with HT 1300 (Analytik Jena, Germany).
