Nowadays, high attention is paid to the knowledge on wettability of biochar, which is still very complicated, since it is acknowledged that it can depend either on primary feedstock, pyrolysis conditions or on environmental factors. Until now, it is known that the main factor responsible for the production of hydrophobic biochar is aliphatic functional groups forming tar compounds which vapour only at a high temperature. High-temperature (> 500 °C) biochar types are considered as hydrophilic due to the effect of the release of pores from the tars. However, it is still not known what the relation between wettability of biochar and other physical-chemical properties of it is and, if it is possible, is there a need to predict wettability of biochar based on other available properties. The article focuses main attention on the determination of physical-chemical properties of biochar made of five different lignocellulosic feedstocks depending on the pyrolysis temperature (300–700 °C) and their relation with the water holding capacity and wettability of biochar using the multiple regression analysis. The results showed that 54% of variation of biochar wettability could be predicted by its average pore size and 77% of variation of biochar water holding capacity could be predicted according to its ash content. Relation of wettability of biochar with its average pore size can be explained by the physical capacity of biochar to adsorb water on its surface and internal pores as well as retention of water among its particles due to capillary forces.

如今，高度关注关于生物炭的可湿性的知识，这仍然非常复杂，因为已经认识到它可以取决于主要原料，热解条件或环境因素。迄今为止，已知产生疏水性生物炭的主要因素是形成焦油化合物的脂肪族官能团，其仅在高温下蒸发。由于焦油中孔隙释放的影响，高温（> 500°C）生物炭类型被认为是亲水的。然而，仍然不知道生物炭的润湿性与生物炭的其他物理化学性质之间的关系，并且如果可能的话，需要基于其他可获得的性质来预测生物炭的润湿性。本文着重于热解温度（300–700°C）下由五种不同木质纤维素原料制成的生物炭的理化性质的测定以及它们与多元炭的持水量和润湿性之间的关系，采用多元回归分析。结果表明，根据其平均灰分可以预测其生物炭润湿性的变化为54％，根据其灰分可以预测其生物炭持水量的变化为77％。生物炭的可湿性与其平均孔径的关系可以用生物炭将水吸附在其表面和内部孔中的物理能力以及由于毛细管力而保留在其颗粒中的水来解释。