Spatial distribution of elements, environmental effects, and economic potential of waste from the Aksu ferroalloy plant [Kazakhstan]

PLoS One. 2023 Apr 19;18(4):e0283251. doi: 10.1371/journal.pone.0283251. eCollection 2023.

Abstract

The utilization or secondary use of technogenic waste is a relevant problem for the current economy. To assess the environmental influence and economic potential, it is necessary to study the elemental content of technogenic objects and to reveal the tendencies of the spatial distribution of elements, components, and indices such as the pollution coefficient. In this study, we performed elemental analysis, and calculation of indicators: average gross content, hazard quotients, concentration coefficients of metals, and total pollution coefficients of ground samples taken from the ash-slag storage of the Aksu ferroalloy plant [Aksu, Pavlodar region, Kazakhstan]. Maps of the spatial distribution of concentrations of elements and total pollution coefficients were created. The territory of the studied ash-slag storage by the level of soil contamination should be considered as an environmental disaster zone. The given statistical data on the number of oncological and respiratory diseases indirectly indicated the negative influence of open storage of ash-slag waste. The studied ground was of chromium-manganese geochemical specialization. The calculated volume of the accumulated waste mass by the approximating method was 1 054 638.0 m3. The calculated approximate weight of the accumulated waste was 23 679 576.0864 tons, including 1 822 972.2 tons of chromium, 1 727 354.0 tons of manganese, and 953 813.3 tons of iron. The large amounts of valuable components retained in the waste mass led us to conclude that the studied technogenic object can be considered as a secondary field to produce various technological products. Moreover, valuable metals can be extracted as metal concentrates.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Chromium / analysis
  • Environmental Monitoring / methods
  • Iron / chemistry
  • Kazakhstan
  • Manganese* / analysis
  • Metals / analysis
  • Metals, Heavy* / analysis

Substances

  • Manganese
  • Iron
  • Metals
  • Chromium
  • Metals, Heavy

Grants and funding

This research was funded by the Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan (Grant No. AP08856347). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript. Authors - Ruslan Safarov, Zharas Berdenov, Yuriy Nossenko, Zhanat Shomanova, Zhuldyz Bexeitova – are receiving the salary from the funder Science Committee of the Ministry of Education and Science of the Republic of Kazakhstan.