scholarly journals Migration and accumulation of heavy metals in disturbed landscapes in developing ore deposits, East Kazakhstan

2013 ◽  
Vol 5 (2) ◽  
pp. 180-187 ◽  
Author(s):  
Gulzhan Beiseyeva ◽  
Jilili Abuduwali
2020 ◽  
Vol 33 ◽  
pp. 1187-1191
Author(s):  
L.R. Sassykova ◽  
Y.A. Aubakirov ◽  
M. Sh. Akhmetkaliyeva ◽  
A.R. Sassykova ◽  
S. Sendilvelan ◽  
...  

2020 ◽  
Vol 159 ◽  
pp. 01003
Author(s):  
Saule Atabayeva ◽  
Saule Kenzhebayeva ◽  
Ravilya Alybayeva ◽  
Saltanatm Аsrandina ◽  
Sabina Shoinbekova

The content of heavy metals around the metallurgical plants of East Kazakhstan in the soil and plants growing around these plants was studied. It was determined the concentration of heavy metals in soils, plant organs, it was calculated bioconcentration factor and the level of extraction of heavy metals by sunflower and lawn grasses. The study of sunflower plants and lawn grasses showed that the studied species accumulated a significant amount of heavy metals mainly in the roots. Sunflower plants and lawn grasses had high accumulation activity and accumulated a significant amount of heavy metals in their organs. Determination of the content of heavy metals in the soil showed a significant removal of heavy metals from the soil, which indicates a high degree of phytoextraction of heavy metals by the studied plant species.


Author(s):  
В.И. Черкашин ◽  
И.М. Газалиев

Целью работы является оценка влияния на окружающую среду выявленных в ходе геологоразведочных работ 1964-1983 гг. рудопроявлений Хнов-Борчинского рудного поля и медно-колчеданного месторождения Кизил-Дере. В основу работы положены данные химических анализов вод рек района исследований и результаты анализа опубликованных материалов по данной тематике. Результаты исследований свидетельствуют о загрязнении водных систем района тяжелыми металлами. Это связывается с тем, что после разведочных работ на рудопроявлениях не проведены в полном объеме ликвидационные, консервационные и рекультивационные работы. Преобладающие в составе руд сульфиды железа, меди, свинца и цинка, взаимодействуя с кислородом воздуха и грунтовыми водами, превращаются в купоросы и сбрасываются в речные системы. Сохранение существующего положения вещей в долгосрочном аспекте может привести к активизации окислительно-восстановительных процессов, процессов выщелачивания в условиях поверхности месторождения Кизил-Дере, к прогрессирующему химическому загрязнению вод и земель бассейна р. Самур солями тяжелых металлов, ухудшению качества питьевых и орошаемых вод, а также к безвозвратному истощению уникального месторождения полезных ископаемых. Учитывая вышесказанное можно сделать вывод. В существующей ситуации считаем необходимым безотлагательное проведение работ по консервации рудопроявлений Хнов-Борчинского рудного поля, которые можно выполнить в рамках действующей Федеральной целевой программы «Ликвидация на- копленного экологического ущерба». При принятии решения о разработке месторождения Кизил-Дередолжен быть разработан проект его разработки с последующим выполнением оценки воздействия на окружающую среду (ОВОС). Это позволит оценить конкретные экономические выгоды от реализации проекта, экологические риски и уровень мероприятий по охране окружающей среды The aim of the study is to evaluate the effect of the ore-occurrences, identified during the geological exploration in 1964-1983, on the environment in the Khnov-Borchinsk ore-field and Kizil-Dere copper-pyrite deposit. The study is based on the chemical analysis data of the waters from the study area and the analysis of published materials on the subject. Results of the study indicate contamination of water systems of the area with heavy metals. This is attributed to the fact that after the exploration there were not carried out the liquidation, conservation and reclamation works on the ore occurrences in full scale. Sulphides of iron, copper, lead and zinc, prevailing in the composition of ores, interacting with oxygen in the air and groundwater, convert into sulfate and are discharged into the river systems. Preserving the status quo in the long run can lead to the activation of the redox processes, leaching processes under the surface of the field of Kizil-Dere, progressive chemical contamination of waters and lands of the Samur river basin with salts of heavy metals, deterioration in quality of drinking and irrigation waters, as well as to the permanent depletion of the unique mineral deposit. The above said allows to conclude that in the current situation we consider it necessary to urgently conduct the works on conservation of the Khnov-Borchinsk ore-field occurrences, which can be done under the existing federal target program “The elimination of accumulated environmental damage.” When deciding on the Kizil-Dere field the exploration project, followed by the implementation of environmental impact assessment (EIA) should be developed. It will allow assessing the specific economic benefits of the project, environmental risks and the level of measures to protect the environment.


2020 ◽  
Vol 2 ◽  
pp. 89-97
Author(s):  
Andrey A. Krasnovsky ◽  
Viktor M. Seryakov ◽  
Yuri N. Shaposhnik ◽  
Denisi A. Shokarev

The statement of the problem of determining the stress-strain state of support and rock mass around the mine working in unstable rocks, in case of voids filling with phenol resins is proposed. The initial parameters used in the calculations correspond to the conditions of mining ore deposits in East Kazakhstan. The distribution character of stress fields in the support and their change depending on geometric sizes of the area filled with phenol resins is determined. It is shown that using phenol resins causes formation of a uniform pressure of surrounding rocks on the arch part of the support and facilitates an increase in its stability.


Author(s):  
Marianna Cangemi ◽  
Paolo Madonia ◽  
Ludovico Albano ◽  
Alessandro Bonfardeci ◽  
Maria Di Figlia ◽  
...  

We collected and analysed 58 samples of groundwater from wells in the Barcellona-Milazzo Plain, one of the most important coastal aquifers of Sicily (Italy), to determine major, minor, and trace element concentrations. In this area, geogenic and anthropogenic sources of heavy metals and other pollutants co-act, making the individuation of the main pollution sources difficult. Our work was aimed at the application of geostatistical criteria for discriminating between these pollution sources. We used probability plots for separating anomalous values from background concentrations, which were plotted on maps and related to possible sources of pollutants. Our results indicate that hydrothermal fluid circulation and the water–rock interaction of country rocks that host mineralized ore deposits generate a significant flux of heavy metals to groundwater, as well as anthropogenic sources like intense agriculture and industrial activities. In particular, NO3, F, and Ni exceed the Maximum Admitted Concentrations (MACs) established by the WHO and Italian legislation for drinking-water. The spatial distributions of geogenic and anthropogenic sources were so deeply interlocked that their separation was not easy, also employing geostatistical tools. This complex scenario makes the implementation of human health risk mitigation actions difficult, since the flow of pollutants is in many cases controlled by simple water–rock interaction processes.


Author(s):  
A. D. Baibotayeva ◽  
G. D. Kenzhalieva ◽  
K. Т. Zhantasov ◽  
M. K. Zhantasova ◽  
E. N. Kocherov

The article provides information on literature and patent information on the analysis of heavy metals formed during the extraction and processing of various types of raw materials for the production of non-ferrous metals and chemical products. The influence of heavy metals on the environment and living organisms, fauna and flora, as well as people living in different industrial regions of Kazakhstan is shown. Migration of heavy metals in the soil cover hydrosphere and atmosphere is shown. Based on the analytical review, the goals and objectives of the study are outlined, the chemical composition of raw materials for the main heavy metals formed in solid and dust - like production waste, and for technological processing in the production of lead and zinc in the East Kazakhstan and Turkestan regions is shown. Information is provided on the presence of heavy metals in the soil and their purification by various bioremediation methods. The data of soil analysis on the territory of the Turkestan region in recreation areas of people and in non-ferrous metallurgy enterprises nearby to the mining complex are presented. The dependence of the distribution of heavy metals and the chemical composition of the analyzed samples taken in various points of the Turkestan region and the city of Shymkent is shown. Data on the maximum content of heavy metals in the soil at which experimental worms die are established.


2021 ◽  
Vol 12 (1) ◽  
pp. 040-046
Author(s):  
Ekaterina Zolotova ◽  

The metallurgical industry is one of the major pollution sources of natural ecosystems. Now the slag dumps of non-ferrous industries occupy huge areas all over the world. The purpose of this literature review was to assess the knowledge degree of the soils and vegetation formed on the non-ferrous metallurgy slag dumps. Most of the research was carried out for the dumps of the copper-smelting (including old dumps) and lead-zinc industries, the dumps of the nickel and aluminum industries have been studied to a lesser extent. The composition of non-ferrous metallurgy slags, the issues of soil pollution with heavy metals, their bioavailability were discussed. The influence of heavy pollution on the biodiversity of pioneer plant communities on the slag dumps of non-ferrous metallurgy and the floristic composition for abandoned copper ore deposits are noted. The experience of Russian scientists in the reclamation of an aluminum sludge dump and Chinese scientists in the reclamation of zinc production slag dumps are considered. The possibility of introducing waste from the copper smelting slag recycling waste into natural ecosystems was discussed. The analysis of literature revealed gaps in knowledge about the gradual formation of the soil and vegetation on man-made landscapes, about the plant biodiversity in conditions of heavy pollution, ways of their adaptation, and the heavy metals accumulation by different plant species.


2020 ◽  
Vol 99 (3) ◽  
pp. 88-98
Author(s):  
A.N. Sabitova ◽  
◽  
B.B. Bayakhmetova ◽  
B.Kh. Mussabayeva ◽  
L.K. Orazhanova ◽  
...  

The purpose of this article is to study the sorption of heavy metals by humic acids of light and dark chestnut soil. The objects of research are the samples of dark and light chestnut soils, selected from an ecologically clean area of East Kazakhstan. Humic acids (HA) were separated from the soil at different pH values. At the same time the yield of HA was 0.075% from dark chestnut soil at pH 1.0, and it was 0.017% from light chestnut at pH=7.0. Further, the dependence of the sorption degree on the medium acidity was established. It was found that zinc and cadmium are better sorbed in a strongly acidic medium (рН1.0; 84.14%), while lead is preferably sorbed at pH 6.0, and the degree of its sorption is higher (93.54%). It was established that metals have a mutual effect, suppressing or enhancing the sorption of each other in bi- and polyelement variants. It was shown that cadmium significantly suppresses lead sorption in neutral media. Zinc more often increases the sorption of both cadmium and lead by 3 times. It was concluded that the binding of heavy metal ions by the organic fraction of the soil occurs due to the complexation with humic acids.


REPORTS ◽  
2021 ◽  
Vol 335 (1) ◽  
pp. 96-103
Author(s):  
R.A. Alybayeva ◽  
M.N. Kalmakhan ◽  
Z.A. Inelova ◽  
S.D. Atabayeva ◽  
N.S. Akhambayeva ◽  
...  

Environmental pollution, especially by chemical substances, is one of the most powerful factors in disrupting components of the biosphere. Currently, the biosphere receives a lot of pollutants. Among them are significant heavy metals. Among the chemical elements, heavy metals are the most toxic. The danger of increasing the content of heavy metals in the soil and heavy metals in the atmosphere is associated with active absorption and accumulation of plants, which not only negatively affect their active actions, but also threaten human and animal health. The danger of metals is that they have a cumulative effect and retain these toxic properties for a long time. In connection with the task of studying the gene pool of cultivated plants in the conditions of technogenic pollution, the study of metal resistance of barley varieties was carried out in order to identify promising forms for growing in the East Kazakhstan region, as well as breeding donors that collect the minimum amount of pollutants. The results obtained allow us to suggest donors resistant to heavy metals that can be used in breeding and genetic research. Barley is a concentrated product for animals, as the composition is rich in starch and protein. Barley seeds, along with amino acids, protein, lysine and tryptophan, which cannot be replaced by another substance, are preserved better than in other crops. Barley in Kazakhstan ranks second after wheat. The East Kazakhstan region is favorable and in demand for growing barley. However, the damage to the vessels by heavy metal affected the commissioning of the product. The most effective way out of this is to prevent the genetic and physiological effects of the genes of these tolerant (hardy) species. Genotype identification is a new and unexplored area of invention for products that grow against heavy metals in plants.


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