## 1 Introduction  
Aliphatic diols (glycols) are chemical compounds containing two hydroxyl groups [1]. Diols are typical reactants and intermediates in a wide range of reactions of esters, aldehydes, amines, azides, carboxylic acids, ethers, as well as in resin formation [2]. These compounds are often used as raw material in the polymer industry because of their hygroscopicity, noncorrosiveness, high boiling points, and solvent properties. Among the glycols, ethylene glycol (EG), diethylene glycol (DEG), and triethylene glycol (TriEG) are the first three members of a homologous series [3]. Ethylene glycol is representative of this group of compounds. It is mainly used as a raw material in the manufacture of polyester fibers. Ethylene glycol is an odourless, colourless, sweet-tasting, and also a toxic substance. In the industry, it has been used as a component of cooling and brake fluids. It is also widespread as a substrate for the production of polyesters. Moreover, EG is characterized by hygroscopicity, which is perfect for use in fibers treatment, paper, printing inks, leather, and cellophane [4]. The group with the most commonly used glycols also include ethylene glycol dimethylacrylate. Ethylene glycol dimathycrelate is a crosslinking monomer, which is often used in the synthesis of polymeric materials. This monomer is characterized by a hydrophilic and polar character, which allows an affinity for the aqueous phase [5]. Summarizing, ethylene glycols and their polymers are used in an enormous range of products and attract considerable interest in many branches of industry and science [6; 7; 8; 9; 10; 11; 12; 13]. In the literature, there are not many reports which have been carried out on the synthesis of polymeric materials for sorption processes based on EgDMA and lignin. That indicates the novelty of the presented work. [PERSON] et al. [14] synthesized an organic/inorganic hybrid adsorbent composed of nano-SiO\({}_{2}\) modified by vinyltrimethoxysilane as the inorganic phase and EgDMA as the organic phase by the dispersion polymerization method. It has been used as an adsorbent for phenol-containing wastewater removal. In another study, [PERSON] et al. [15] prepared an acrylic composite resin that was modified by calcium lignocellulosic using the solution polymerization, where calcium lignocellulosic and acrylic acid were used as raw materials, and EgDMA as the crosslinker. The authors demonstrated a good adsorption capability of the obtained material to methyl orange with the adsorption capacity of 188.33 mg/g. [PERSON] et al. [16] obtained a porous lignin-containing hydrogel for dye removal via graft copolymerization of the acetic acid lignin and acrylamide, using EgDMA as a crosslinker and H\({}_{2}\)O\({}_{2}\) as an initiator. The authors showed that increased lignin content in the hydrogel promotes the adsorption of methylene blue. The maximum adsorption capacity was 29.65 mg/g. [PERSON] et al. [17] prepared lignin-based encapsulating fertilizers in the form of hollow microspheres for controlled release. The encapsulation efficiency was 46% of the trapped urea as encapsulated inside the lignin microspheres. One of the methods to prepare porous materials is a pyrolytic reaction called carbonization. During this process, many different reactions concurrently occur (dehydrogenation, hydrogen transfer, isomerization, and condensation). As a consequence of chemical bonds breakdown, some functional groups are lost, while other bonds undergo transformation to form aromatic systems [18]. The presence of aromatic rings in the starting material promotes this process. For this reason, it is desirable for the carbonized material to have as many such structures as possible. Substrates used in this process can be both synthetic materials (polymers) and raw materials of natural origin such as nut shells, fruit stones (e.g., peaches) [18], used industrial byproducts [19], or even wastes from households (coffee grounds) [20].