Filters
Assessment of the Influence of Aluminum, Iron, and Manganese Forms on the Phytocenoses of Post-Mining Lands in the Lengerskoye Brown Coal Mine
Post-mining land in areas where mineral extraction has occurred may constitute a significant portion of the land used for various purposes. Such land serves as soil-forming parent material for developing anthropogenic soils, which sometimes exhibit unfavorable physicochemical properties. The toxicity of the waste generated during lignite mining is due to a number of factors, whose determination permits the identification of its origin for the subsequent design of technologies for the waste reclamation. The purpose of the study, in consistence with sustainable development, is to identify the causes of the toxicity of brown coal waste from the Lengerskoye deposit, in southern Kazakhstan. These studies have provided the results essential for planning remedial actions necessary to improve the well-being of the local population, in accordance with the principles of sustainable development. The studies were performed using single extraction; forms of Al, Fe, and Mn; soil texture; elemental analysis; phytocoenosis analysis; and diffractometric, IR spectroscopic, SEM, route reconnaissance, and comparative statistical methods. A decrease in the biodiversity of plant species was noted, with a gradual increase with distance from the waste storage sites. The most resistant plant species in the vicinity of the waste dump were Cynodon dactylon (L.) Pers and Alhagi pseudalhagi (M. Bieb.) Desv. ex B. Keller & Shap., while Dodartia orientalis (L.) was the only plant species found at the edge of the waste dump. The high toxicity of lignite waste is determined by such factors as low pH values, about 3.0; high content of active forms of aluminum, iron, and manganese (344.0, 0.90, and 20 mg/kg); high electrical conductivity—2835 µS/cm; waste composition poor in nutrients; and climate aridity. It has been observed that a content of exchangeable aluminum above 100 mg/kg resulted in an almost complete lack of vegetation.
К вопросу о биорекультивации почв, загрязненных отходами бурого угля месторождения ленгерское на юге Kазахстана
On the 12th of June, 2024, under the aegis of the “Department of Environmental Engineering and Ecology” of the Faculty of Chemical Technology and Metallurgy of the Georgian Technical University, the international scientific conference titled “Environmental Protection and Sustainable Development” was held, which was dedicated to the 85th anniversary of the founder of the Chair of Environmental Protection and Engineering Ecology, doctor of chemical sciences, professor Dimitri Eristavi. The work of a conference included the following scientific directions: environmental protection and new technologies; socioeconomic aspects of environmental protection and ecological safety; assessment of ecological state of available environmental facilities; biodiversity and urban ecology; environmental chemistry and ecology; ecological aspects of power engineering – energy efficiency. 245 scientists, including 32 foreign scholars from England, Germany, Japan, Greece, Poland, Bulgaria, Qatar, Pakistan, Kazakhstan and Armenia expressed their will to participate in the proceeding of a conference. The goal of the conference was to get acquainted with scientific research works carried out in the area of “environmental protection and ecology”; “chemical and biological technologies”, “metallurgy and material science”; “chemistry and pharmacy”; “power engineering”, “mining geology”, “hydrometeorology”; to share experience, establish mutual cooperation, coordinate the current studies, and to outline the prospects of application of results necessary for country.