scholarly journals СОВРЕМЕННЫЕ ПОДХОДЫ К НОРМИРОВАНИЮ СОДЕРЖАНИЯ ТЯЖЕЛЫХ МЕТАЛЛОВ В ПОЧВЕ

2021 ◽  
Vol 7 (3(57)) ◽  
pp. 8-10
Author(s):  
ДЕНИС ВИКТОРОВИЧ ВАСИН
Keyword(s):  
Heavy Metals ◽  
Maximum Permissible Concentration ◽  
Acidic Soils ◽  
Mobile Form ◽  
Active Elements ◽  
Maximum Permissible Content

В статье рассматриваются вопросы нормирования содержания тяжёлых металлов в почве. Приводятся показатели предельно - допустимых концентраций (ПДК), описывается предельное допустимое содержание подвижной формы тяжелых металлов, а также дается классификация биохимически активных элементов в кислых и сильно кислых почвах. The article deals with the issues of normalization of the content of heavy metals in the soil. The indicators of the maximum permissible concentration (MPC) are given, the maximum permissible content of the mobile form of heavy metals is described, and the classification of biochemically active elements in acidic and strongly acidic soils is given

scholarly journals Use of Post-Extraction Fir Wood Greenery Residues by the Bioconversion Method with the Production of Feed Additives

Forests ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 272
Author(s):  
Olga O. Mamaeva ◽  
Elena V. Isaeva
Keyword(s):  
Heavy Metals ◽  
Weight Loss ◽  
Maximum Permissible Concentration ◽  
Forest Resources ◽  
Feed Additives ◽  
Feed Additive ◽  
Pleurotus Pulmonarius ◽  
Balsam Poplar ◽  
Fallen Leaves ◽  
Protein Feed

The effectiveness of forest resources depends on the comprehensiveness and rationality of their consumption and processing into finished products. This article discusses the problem of using solid fir wood greenery residues generated during the industrial production of essential oils. Bioconversion is considered to be the most promising use. The objective of this research was to study the chemical composition of bioconversion products of fir wood greenery-based substrates. The РР-3.2 strain of Pleurotus pulmonarius (Fr.) Quél was used as a biodestructor. In the process of bioconversion, the contents of polysaccharides and lignin substances is reduced to 38% and 28%, respectively. Up to 20% of protein accumulates in bioconversion products of fir wood greenery. The amount of nucleic acids is not more than 1.5 g per kg; the contents of heavy metals, such as mercury, cadmium, arsenic, and lead, do not exceed the maximum permissible concentration standards. The substrate weight loss reaches 15%. When fallen leaves and post-extraction poplar bud residues are added to the substrate, the substrate-destroying activity of fungi increases, and the protein content increases by 3%. The digestibility of products as a result of bioconversion increases 1.6–2.8 times depending on the substrate composition. The obtained data support the recommendation of post-fermented substrates based on fir wood greenery and balsam poplar biomass for use as a protein feed additive.

scholarly journals HYDROCHEMISTRY OF THE PYANJ TRANSBOUNDARY RIVER UPSTREAM, MIDDLE AND DOWNSTREAM AND THE CRITERION ITS USE FOR IRRIGATION

2021 ◽  
Vol 445 (1) ◽  
pp. 114-120
Author(s):  
I. Sh. Normatov ◽  
V.V. Goncharuk ◽  
N.A. Amirgaliev ◽  
A.S. Madibekov ◽  
A.I. Normatov
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Water Samples ◽  
Alkali Metals ◽  
Alkaline Earth ◽  
Maximum Permissible Concentration ◽  
Agricultural Land ◽  
Transboundary River ◽  
Formation Zone

The water quality of the transboundary Pyanj River in the formation zone and along the riverbed before merging with another tributary of the transboundary Amu Darya River-the Vakhsh River was studied. The water quality on the upstream river corresponds to the very soft class (> 1.5 mmol/dm3) and in the middle and the downstream to the soft class (1.5-3.0 mmol/dm3). At the upper, middle and lower reaches of the Pyanj river the concentration of alkaline earth exceeds alkali metals (Ca2+ + Mg2+> Na+ + K+) at HCO3- > SO42- + Cl- and according to the Handa classification they are characterized by temporary rigidity. To assess the criterion of applicability of the Pyanj river water for irrigation the coefficient of sodium adsorption (SAC) was calculated for water samples from the upstream (Khorog), middle (Darvaz) and the downstream (Lower Pyanj) of the Pyanj river that were equal to 0.88; 1.07; 1.71, respectively. The SAC values for all water samples (from the upper, middle and lower reaches) of the Pyanj river indicate their good qualities for irrigation of agricultural land. The concentration of heavy metals in the Pyanj river is significantly lower than the maximum permissible concentration (MPC).

Chemometrical classification of biomonitoring analytical data for heavy metals. Part II. Mosses as bioindicators

1999 ◽  
Vol 69 (3-4) ◽  
pp. 287-294 ◽  
Author(s):  
S. Tsakovski ◽  
V. Simeonov ◽  
Th. Sawidis ◽  
G. Zachariadis ◽  
J. Stratis
Keyword(s):  
Heavy Metals ◽  
Analytical Data

scholarly journals Determine heavy metals in water, aquatic plants, and sediment in water systems

2020 ◽  
Vol 222 ◽  
pp. 02028
Author(s):  
Hassan Flefel ◽  
Denis Nokhrin ◽  
Irina Donnik
Keyword(s):  
Heavy Metals ◽  
Aquatic Plants ◽  
Water Bodies ◽  
Mobile Form ◽  
Atomic Absorption Determination ◽  
Absorption Determination ◽  
Rivers And Lakes ◽  
Definition Of ◽  
Methodological Guidelines

Objective: Biomonitoring pollution of water bodies with heavy metals using evaluation of the level of concentration of heavy metals in water, aquatic plants, and sediments in 9 important rivers and lakes in the water bodies of Yekaterinburg. (Eight rivers and one lake). Methods: Sample preparation for the atomic absorption determination of the acid-soluble “mobile” form of eight metals (Mn, Fe, Co, Ni, Cu, Zn, Cd, Pb) in the composition of bottom sediments was carried out by the method of wet mineralization in accordance with the Methodological Guidelines the definition of heavy metals. Results: All concentrations of heavy metals in sediments and aquatic plants were higher than in a water sample. Conclusions: Concentrations of all water samples were within acceptable limits established by WHO, while the concentrations of all aquatic plants and sediment were above the acceptable limits of WHO.

scholarly journals Heavy metal content in compost and earthworms from home composters

2017 ◽  
Vol 28 (4) ◽  
pp. 1-4 ◽  
Author(s):  
Marta Bożym
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Content ◽  
Total Content ◽  
Heavy Metal Content ◽  
Organic Fertilizers ◽  
Allotment Gardens ◽  
Naturally Occurring ◽  
Polish Law

Abstract The paper presents the results of compost tests from home composters and earthworms living there, that treating waste into compost. The samples were taken from home composters and allotment gardens from Opole Region. The composting material was green waste. The total content of heavy metals (Cd, Pb, Cu, Zn, Ni Cr) in compost and compost earthworms’ samples were determined. It was found that the compost samples were not contaminated with heavy metals. According to the Polish classification of composts from municipal wastes, the composts met the requirements for first class of quality. The composts did not exceed the limits of heavy metals specified in the Polish law for solid organic fertilizers. The degree of metal accumulation by compost earthworms depended on the type of metal. The high value of the bioaccumulation factor (BAF) was obtained for Cd, Pb and Zn. No accumulation of other metals (Ni, Cr, Cu) in earthworm bodies was found. It has been found that earthworm species, naturally occurring in Poland, can also be used as potential bioindicators of metals in the environment, such as the species Eisenia fetida. The aim of the study was to evaluate the heavy metal content in composts from home composters and ability to accumulate metals by compost earthworms.

scholarly journals MONITORING OF SOILS CONTAMINATION OF SOME REGIONS OF THE REPUBLIC OF ARMENIA WITH HEAVY METALS

2017 ◽  
Vol 17 ◽  
pp. 275-283
Author(s):  
G. A. Hambaryan ◽  
A. V. Santrosyan ◽  
Yu. R. Ishkhanyan
Keyword(s):  
Heavy Metals ◽  
Maximum Permissible Concentration ◽  
Chemical Elements ◽  
Ecological Monitoring ◽  
Ecological Condition ◽  
Background Concentration ◽  
Climatic Zones ◽  
Paradoxical Situation ◽  
Maximum Permissible Concentrations ◽  
The Republic

The paper is devoted to the problems of soils contamination of some regions of the Republic ofArmenia and a city of Yerevan with heavy metals. The results of analyses of the selected soil tests for the purpose ofdefinition of their contamination degree with heavy metals are listed. The statistical data on the background concentration of heavy metals in various soil-climatic zones of the Republic of Armenia, not influenced with appreciable anthropogenous impact is also given. The comparative analysis on presence of polluting chemical elements in soil is carried out for the approved norms of maximum permissible concentration and background indicators. The authors consider possible negative influences on environment as a result of soils contamination, in particular on biological activity of soil and processes of its self-cleaning. It’s noticed that maximum permissible concentrations are mainly developed only from hygienic positions which do not consider the variety ofsoils, in particular, their properties. As an example there are described the results of soils researches of some regions of the Republic of Armenia and there is noticed that a paradoxical situation arises when background contents toxic elements in soils exceed the established values of maximum permissible concentration. In the paper there is arisen the question on necessity of working out and introducing in practice ecological monitoring of the system of tentatively permissible quantity of chemical elements in soil, taking into account background concentration of heavy metals in various soil-climatic zones. Introduction of the specified system will allow reasonably and, what very important, reliably to estimate an ecological condition of soils and to define the influence of contamination on qualitative characteristics of soil as a result of anthropogenous influence.

scholarly journals Contamination of bottom sediments by lead, zinc and cadmium in Rzeszow reservoir

2018 ◽  
Vol 29 (4) ◽  
pp. 10-15
Author(s):  
Katarzyna Maj-Zajezierska ◽  
Piotr Koszelnik
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
Sediment Quality ◽  
Environmental Risks ◽  
Sediment Classification ◽  
Quality Classification ◽  
Lead Zinc ◽  
Aquatic Sediment ◽  
Positive Effect

Abstract The aim of the present study was to determine the level of contamination of the bottom sediments in the Rzeszow reservoir by the selected heavy metals Pb, Cd and Zn, and to identify the potential environmental risks of heavy metals content basing on available assessments and classification of bottom sediments. The Rzeszow reservoir is situated on the Wisłok River in the Podkarpackie Voivodeship, southeaster Poland, was constructed on 1974. Nowadays, as a result of silting, the reservoir reduced its surface and depth, which does not have a positive effect on the assumed functions it is to perform. The study was conducted in 2016. The samples of sediment were collected in five locations. Samples were taken twice: in June and in October. The following concentrations have been determined: cadmium - 0.01 ÷ 0.92 mg•kg–1, zinc - 54.39 ÷ 128 mg•kg–1, lead - 2.98 ÷ 25.42 mg•kg–1. The decline trend in the sediment is following: Zn > Pb > Cd. For the assessment of sediment contamination, following methods: aquatic sediment quality classification used by the Polish Geological Institute - I class, Regulation of the Minister of Environment of April 16 2002 on the types and concentrations of substances contaminating the excavated material – unpolluted and LAW sediment classification – Pb - I/I-II, Cd - I/I-II/II and Zn - I/I-II. The obtained results were compared with the results obtained by the other authors in earlier years, which led to the estimated changes in the concentration of the tested metals.

scholarly journals ДИНАМІКА ЗАБРУДНЕННЯ ВОД СІЛЬСЬКОГОСПОДАРСЬКОГО ПРИЗНАЧЕННЯ ВАЖКИМИ МЕТАЛАМИ

2014 ◽  
pp. 58-62
Author(s):  
В. В. Коваль ◽  
С. О. Кучерявий ◽  
В. О. Наталочка ◽  
В. М. Нечитайло ◽  
О. Г. Фесенко
Keyword(s):  
Heavy Metals ◽  
Water Resources ◽  
Soil Fertility ◽  
Organic Farming ◽  
Natural Waters ◽  
Maximum Permissible Concentration ◽  
Salt Content ◽  
Ecological Status ◽  
Technological Design ◽  
State Technological

Наведено результати досліджень вмісту солейважких металів у природних водоймах Полтавськоїобласті. Підкреслюється, що одним із забруднювачіввододжерел є хімізація сільського господарства. До-слідження проводились у 2008–2012 роках на базіПолтавського обласного державного проектно-технологічного центру охорони родючості ґрунтів іякості продукції. Результати їх показали, що пере-вищень ГДК не спостерігається, отже, є передумовидля ведення в регіоні екологічного землеробства. Од-нак необхідною передумовою цього є наявністьоб’єктивної інформації щодо агроекологічного стануґрунтових і водних ресурсів, а також впровадженняекологічно безпечних технологій вирощування сільсь-когосподарських культур. The research results of the salt content of heavy metals in natural waters of the Poltava region have been shown. It is emphasized that one of the pollutants of water sources is chemicalization of agriculture. The studies were conducted in 2008-2012 on the basis of the Poltava Regional State Technological Design Center to protect soil fertility and quality. The results of studies showed that overrunning of maximum permissible concentration is not observed, therefore, there are prerequisites for doing organic farming in the region. However, a prerequisite to this is the availability of objective information concerning the agro-ecological status of groundwater and water resources, as well as the introduction of environmentally friendly technologies of growing crops.

scholarly journals Estimation of the Seasonal Variability of the Content of Heavy Metal Compounds in the River Waters of the Foothill Zone of the Central

2020 ◽  
pp. 68-81
Author(s):  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
River Water ◽  
Seasonal Variability ◽  
Maximum Permissible Concentration ◽  
Metal Compounds ◽  
River Waters ◽  
Central Caucasus ◽  
Term Data

Based on long-term data, the seasonal variability of the content of heavy metal compounds in the water of the rivers of the foothills of the Central Caucasus – the Terek, Malka, Baksan, Ardon, Cherek, and Urukh – was estimated.Generalizing studies affecting the regional characteristics of the level of hazardous heavy metals in the river waters of the foothill zone of the Central Caucasus have not been carried out over many years. Therefore, the objective of the study was to assess the level of hazardous compounds of heavy metals (Cr, Ni, Mo, Mn, Zn, Pb) in the water of the Terek, Malka, Baksan, Ardon, Cherek and Urukh rivers at 6 observation points located in the foothill zone of the Central Caucasus, for the period from 2005 to 2018. In the analysis, the atomic absorption method using the MGA-915M electrothermal atomizer was used. The level of heavy metal compounds in river water was evaluated by such characteristics as the long-term average and median concentrations, the range of concentration fluctuations, and the frequency of exceeding the maximum permissible concentration. An analysis of long-term data for the period 2005-2018 on the study of the level of heavy metal compounds in the water of the Baksan, Malka, Urukh, Terek, Cherek and Ardon rivers in the foothill zone of the Central Caucasus shows that river water pollution to a greater extent occurs in summer rain flood . The revealed levels of heavy metal compounds in river water over the long-term period under study, as well as the frequency of exceeding the maximum permissible concentration, are illustrated by graphs. The results obtained may be relevant in the development of regional water quality indicators.

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