Basic physicochemical characteristics of the state of Upper Amur surface water

Radomskii, S. M.; Radomskaya, V. I.; Matyugina, E B; Гусев, М. В.

doi:10.1134/s009780780701006x

Cited by 8 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their subsequent enrichment with these metals took place when the water stream gradient changed and erosion became more intense, as well as during floods. For example, the content of Au in the Amur River near the city of Blagoveshchensk increases during floods, as compared with the low-water period, from 0.05 to 0.14 µg/dm 3 (Radomskii et al, 2007). Since the regional surface waters are connected with groundwaters, the latter also supply NMs as ions to coals.…”

Section: Revealing Of Noble-metal-and Rare-metal-promising Areas In Cmentioning

confidence: 95%

The regularities of formation of noble- and rare-metal mineralization in Cenozoic coaliferous deposits in the southern Far East

Сорокин

Rozhdestvina

Kuz’minykh

et al. 2013

Russian Geology and Geophysics

View full text Add to dashboard Cite

We performed system studies of age parageneses and lateral conjugation of peat and gold accumulation areas as well as the regularities of formation of noble-and rare-metal mineralization in Cenozoic coaliferous deposits in the south of the Russian Far East. The migration properties of noble metals (NMs) and their behavior in different media are considered. Based on literature data and results of experimental studies, we performed analysis and selection of the most optimal methods for the quantitative determination of NMs and trace and rare-earth elements. The experiments have confirmed the NB fugacity and have shown for the first time the scales of transportation of NMs as ultrafine particles during coal combustion. The obtained results significantly expand the notions of the migration properties of NMs and serve as the key to the solution of the problem of NM extraction in analytical and technological processes. Also, areas promising for noble-and rare-metal mineralization have been revealed in coal basins.

show abstract

Section: Revealing Of Noble-metal-and Rare-metal-promising Areas In Cmentioning

confidence: 95%

The regularities of formation of noble- and rare-metal mineralization in Cenozoic coaliferous deposits in the southern Far East

Сорокин

Rozhdestvina

Kuz’minykh

et al. 2013

Russian Geology and Geophysics

View full text Add to dashboard Cite

show abstract

“…Water quality assessment depends on the type of water use. Thus, the MPC of a water body differs with its use (Radomskii et al 2007). For this study, the MPC for domestic needs was used (OMS 1987;Rodier 1984).…”

Section: Evaluation Of Water Qualitymentioning

confidence: 99%

“…In the early 1970s it was thought that water quality, under which the efficiency of reproduction of aquatic organisms is highest, must be regarded as good water quality. But according to Radomskii et al (2007), urbanization, anthropogenic activities in the floodplain, and other cropping activities affect water quality. Societal activities interact with the environment for the provision of basic needs (food, shelter, and clothing), and in doing so, contaminate the waters by making them unhealthy for human consumption (Ajibade 2004).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of water quality in the Ouémé River (Bénin)

et al. 2011

View full text Add to dashboard Cite

Water is an essential element for humankind, animals, and plants. It is also an important element of the aquatic environment (the natural habitat of multiple species), where its quality plays a determining role in their protection and conservation. Unfortunately, the water quality of natural environments has worsened in the last decades. In sub-Saharan Africa and particularly in Bénin, in contrast to river discharges, monitoring the quality of surface water is a very rare activity. Thus, knowledge about physical and chemical properties as a basis for evaluation of the state of the environment and protection measures needed is almost absent. This article presents the results of the first structured, regular monitoring campaign on surface waters in the whole basin of the Ouémé River in Bénin Republic. With 510 km, the Ouémé River's water quality fluctuates from upstream (Taneka Koko mountains in the north) to downstream (gauging station Bonou in the south) sources. This is due to soil erosion, lack of water treatment plants, and the use of significant quantities of fertilizer in the cotton zone. The present research was initiated to study the resource degradation of this area through chemical and physical water analysis. The monitoring of water quality has been followed for 5 years on twenty physicochemical parameters, from samples taken at four gauging stations on the main channel of the Ouémé River. Means and standard deviations of water analysis results were compared to both the recommendations of the World Health Organization (WHO) and the Maximum Permissible Concentrations (MPC) for drinking water (WHO 1987). Thus, high values were observed for physical parameters, i.e., color and turbidity had peaks of 697.5 uC and 129 FTU at Bétérou station in the wet season, although certain parameters, such as total hardness, present low values compared to the recommended standards. Moreover, excluding the concentrations of NO 2 -and NH 4 ? with values above the MPC, nutrient concentrations posed no direct risk for human consumption. However, together with phosphate concentrations (which are up to ten times higher than permissible ecological thresholds), they can cause eutrophication of the aquatic ecosystem. Due to the current flow regime, which has very low discharge rates in the dry season and torrential rainfall and high sediment loads in the wet season, the risk of eutrophication, i.e., excessive concentrations of ammonium and phosphates, is present throughout the year. Accumulation of ammonium and the distribution of nitrate and nitrites in the river water suggest that nitrification is impeded due to a lack of oxygen in both dry and wet seasons. Finally, the investigations show that the risk of water pollution exists and it is necessary to take measures of sanitation and water treatment to prevent the further degradation of water along the Ouémé River.

show abstract

An assessment of metal-humus complexes in river waters of the Upper Amur basin, Russia

Левшина

2017

Environ Monit Assess

View full text Add to dashboard Cite

The dissolved metal concentrations have been assessed for Co, Cr, Cu, Fe, Mn, Ni, V, Zn, Ca, Mg, and Cd, and their complex compounds with humic substances (Me-HS complexes) in river waters of the Upper Amur basin using the inductively coupled plasma-mass spectrometry technique. The study shows an increase in the amount of Me-HS complexes from the southwestern steppe and forest-steppe to the northeastern mountainous taiga areas. In alkali waters of the steppe and forest-steppe areas with low concentrations of HS, the amount of Zn-HS complexes increases considerably. The observed general regularity in the distribution of metals is as follows: Fe > Cu ≥ Zn > Cr > V > Ni > Сo ≥ Mn > Ca > Mg > Cd. In acidic and neutral waters of the taiga rivers containing high concentrations of HS, 50% of metals are complexed with HS. Metals are arranged in the following order: Fe > Cu > Ni > Cr > V > Zn > Сo > Mn > Ca > Mg > Cd. Quantitative characteristics and a correlation matrix show that Me-HS complexes are dominant among toxic metals (Ni, Cu, Zn, Cr, Fe, and V) and account for 40-55% of total dissolved forms. This allows us to evaluate the important role of Me-HS complexes in satisfactory ecological situation in rivers of the Upper Amur basin. However, toxicity may increase in separate watercourses (Chita and Argun rivers) due to high concentrations of dissolved Zn, Cu, and Cr, which indicate local and transboundary sources of pollution.

show abstract

Basic physicochemical characteristics of the state of Upper Amur surface water

Cited by 8 publications

References 0 publications

The regularities of formation of noble- and rare-metal mineralization in Cenozoic coaliferous deposits in the southern Far East

The regularities of formation of noble- and rare-metal mineralization in Cenozoic coaliferous deposits in the southern Far East

Evaluation of water quality in the Ouémé River (Bénin)

An assessment of metal-humus complexes in river waters of the Upper Amur basin, Russia

Contact Info

Product

Resources

About