Bottom Sediments in a River under Acid and Alkaline Wastewater Discharge

Abstract

The drainage flows of metal loads into the drainage and infiltration waters of mine dumps of enterprises have a dramatic effect on small rivers in industrial regions. The paper considers the outcomes of geochemical monitoring of the Karagaily River and assesses the transformation of the acid-base conditions depending on the influence of the facilities of the enterprise. The results of engineering and environmental surveys, including sampling of bottom sediments, laboratory preparation, chemical elemental analysis of samples and X-ray diffraction analysis of mineral composition, were presented. A complex technogenic alkaline sorption-hydroxide barrier was found at the mixing point of acidic river waters (the influence of dump and quarry waters) and alkaline wastewater of treatment facilities, where the deposited iron hydroxide adsorbs ore minerals, which reduces their outflow into larger rivers and increases the self-purification potential of the river. Further interaction of iron hydroxide with the acid mine drainage and calcium bicarbonate of wastewater results in pyritization of bottom sediments. Excavation and dewatering of the pyrite-containing bottom sediments will allow their joint use with tailings and ore-processing waste for re-extraction useful components.

Extraction of Inclined Exit Ledges in Coal Mines in Presence of Mobile Crushing and Conveyor Complexes

“…Iron ore quartzites are quite contrasting in strength. The strength coefficient varies from 7.1 to 20.7 (8,9).…”

“…UZTM-KARTEX manages the Russian manufacturers of electric mining excavators, PJSC Uralmashzavod and Korobkov IZ-KARTEX LLC. [7][8][9] As part of a single group of companies, Uralmashzavod and IZ-KARTEX are the monopoly representatives of electric mining excavators in the post-Soviet space and control 81% of the market in Russia and neighboring countries. The dynamics of excavator deliveries by UZTM-KARTEX Group companies are presented in Table 1.…”

Comparison of UNIFAC and LSER Models for Calculating Partition Coefficients in the Hexane–Acetonitrile System Using Middle Distillate Petroleum Products as an Example

“…The use of the larger sample quantity is not always possible as well because it can lead to the detector or column overload. However, the analysis of these components is an important analytic and technological task because heterocyclic compounds are strong catalytic poisons, and it is necessary to take into account their content in raw materials when selecting the processing method. , Content of these substances is regulated by environmental requirements. − In most cases, these components are analyzed after selective solvent extraction.…”

Оценка возможности использования отходов железо-магниевого производства для очистки сточных вод от тяжелых металлов (Cd2+, Zn2+, Co2+, Cu2+)

“…The materials that are widespread in the area of the source of industrial wastewater are of economic interest. Thus, the studies of the processes that determine the accumulation and migration of heavy metals in technogenically polluted ecosystems (especially in areas where industrial enterprises operate), the implementation of methods for detoxifying water resources based on the use of materials which contain production waste, are an intensely developing area of research [13,14].…”