Based on the knowledge of the impact of aspects tied to and utilised technology and raw materials on the speciation of mercury in the flue gas, the authors have undertaken the task of examining the process of sorption of mercury from flue gases using fine-grained organic materials. The main objectives of this study was to recommend a Low-Cost Organic Asorbent such as coke dust CD, Corn straw char CS-400, Brominated Corn straw char CS-400-Br, Rubber Char RC-600 and Granulated Rubber Char GRC-600 to efficiently substitute expensive dust-sized activated carbon. The study covered combustion of lignite from Polish field. The experiment was conducted at temperatures reflecting conditions inside a flue gas purification installation. The average mercury content in Polish lignite was 465 µg·kg-1. The concentration of mercury in flue gases emitted into the atmosphere was 17.8 µg·m-3.The study analysed five low-cost sorbents with the average achieved efficiency of mercury removal from 18.3 to 96.1% for lignite combustion depending on the flue gas temperature. Two of the tested sorbents exhibited good potential for Hg0 into Hg2 + oxidation, resulting in enhanced mercury removal from the flue.