scholarly journals Research of the Kizil-Dere Deposit Gallery Drainage Impact on Ecological and Hydro/chemical State of the Samur River Basin Waters

2013 ◽  
Author(s):  
Keyword(s):  
Heavy Metals ◽  
River Basin ◽  
Surface Waters ◽  
River Sediments ◽  
Chemical State ◽  
Technogenic Impact ◽  
Chemical Status ◽  
Heavy Metals Ions

Ecological and hydro/chemical status of surface waters and river sediments subjected to technogenic impact of the Kizik-Dere deposit has been assessed according to the data of the 2010–2011 testing. It has been stated that the gallery drainage from the deposit negatively infl uence the Samur River basin waters quality during some periods. Accumulation of the heavy metals ions and their extremely high content in the gallery drainage sediments were noted in the Kizil-Dere and the Akhtychay rivers that were second and fi rst order tributaries of the Samur River, respectively.

scholarly journals Danube River Basin Waters on Romanian Territory: Chemical Status Assessment Based on Priority Substances Data Analysis

2019 ◽  
Vol 70 (9) ◽  
pp. 3292-3298
Author(s):  
Ana Maria Anghel ◽  
Gyorgy Deak ◽  
Petra Ionescu ◽  
Cristina Cimpoeru ◽  
Irina Ciobotaru ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
River Basin ◽  
Significant Risk ◽  
Danube River ◽  
Chemical Pollution ◽  
Priority Substances ◽  
Sediment Samples ◽  
Chemical Status ◽  
Danube River Basin

Framework Directive (2000/60/EC) (WFD) sets out a series of legal measures at European level against surface waters chemical pollution. The EU-list, annex of the WFD, contains those substances that present a significant risk to human health via aquatic environment, known as priority substances. In the last ten years, the Danube water quality has improved significantly. Instead, heavy metals concentrations in the tributaries waters sometimes were found to be rather highest and the chemical status is not in-line with the WFD requirements. Therefore, the Danube River Basin (DRB) waters quality showed a significant variability in terms of priority substances due to the diverse human activities, especially mining activities. This research paper aims to assess the chemical status of the DRB waters located on Romania territory regarding six heavy metals: Pb, Cd, Ni, Cr, Cu, and Zn by analysing water and sediment samples collected from different areas (south-west and north-west of Romania). Based on the obtained results by evaluating the quality elements, the water chemical status of DRB achieved a good chemical status for 74% of water samples and 55% of sediment samples. Also, the basic statistic and multivariate analysis were used to explore the relationship between the concentration values obtained for priority substances to underlying the water quality assessment.

scholarly journals Distribution and Identification of Sources of Heavy Metals in the Voghji River Basin Impacted by Mining Activities (Armenia)

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
A. V. Gabrielyan ◽  
G. A. Shahnazaryan ◽  
S. H. Minasyan
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Heavy Metal ◽  
River Basin ◽  
Mining Activity ◽  
Pollution Sources ◽  
Pollution Level ◽  
Chemical Status ◽  
Metal Contents ◽  
Mining Regions

The objective of this research is to assess the distribution of heavy metals in the waters and sediments of the Voghji River and its tributaries impacted by mining activity and to reveal the real source of each of the heavy metals in the environment for assessing the pollution level of heavy metals. Voghji River with two main tributaries (Geghi and Norashenik) drain two mining regions. To identify distribution and pollution sources of heavy metals, the water and sediment samples were collected from eight sampling sites. The results of statistical analysis based on data sets of the period 2014–2016 showed that, after the influence of drainage water and wastewater of mining regions, heavy metal contents in the Voghji River basin dramatically increased. The waters of the Voghji River were highly polluted by Mn, Co, Cu, Zn, Mo, Cd, and Pb. The relation of metals content was highly changed due to anthropogenic impact disturbing the geochemical balance of the Voghji River. The water quality based on only heavy metal contents in the source of the Voghji River belongs to “good” chemical status, and in the sources of Geghi and Norashenik Rivers it is “moderate.” The water quality of Voghji and Norashenik Rivers is sharply worsening after the influence of mining activity, becoming “bad” chemical status. The research revealed the pollution sources of each metal.

The main principles and results of pollution monitoring of sediments in the river basin

2020 ◽  
pp. 14-20
Author(s):  
B. Korzhenevsky ◽  
Gleb Tolkachev ◽  
Nikolay Kolomiycev
Keyword(s):  
Heavy Metals ◽  
River Basin ◽  
Water Exchange ◽  
Pollution Monitoring ◽  
Small Rivers ◽  
Volga River ◽  
Natural Landscape ◽  
Volga River Basin ◽  
Ivankovo Reservoir ◽  
Selection Of

The problems of modern geological ecology associated with the study of pollution of sediments of water bodies by heavy metals are considered. The Volga River basin is quite heterogeneous, both in geomorphological and hydrological terms, and in thechnogenical development and usage. A fourrank taxonomy is presented for the selection of sites for monitoring, based on a combination of natural, landscape, climatic and thechnogenical factors. To the largest – the highest taxon – sites of the Ist category – bowls of reservoirs with the slopes and the urban zones, industrial and agricultural structures located within them are carried. Within these areas are allocated to smaller taxa, areas category IInd are the industrial and urban zones, areas category IIIrd are the small rivers without significant contamination and areas category IVth to conduct special observations. The examples of special observations in the study of the annual migration of heavy metals in the system «bottom sediments – water column» on the Ivankovo reservoir are highlighted. The investigations were carried out under the conditions of the standard flow rate for this reservoir and in the conditions of slow water exchange.

Parameters Affecting Dye Adsorption - Using Graphene Coated Sand (GSC)

2018 ◽  
Vol 4 (02) ◽  
Author(s):  
Seroor Atalah Khaleefa Alia ◽  
Dr. Mohammed Ibrahimb ◽  
Hussein Ali Hussein
Keyword(s):  
Heavy Metals ◽  
Contact Time ◽  
Organic Dyes ◽  
Low Cost ◽  
Dye Adsorption ◽  
Contaminated Water ◽  
Maximum Adsorption Capacity ◽  
Engineering Designs ◽  
Heavy Metals Ions ◽  
Coated Sand

Adsorption is most commonly applied process for the removal of pollutants such as dyes and heavy metals ions from wastewater. The present work talks about preparing graphenic material attached sand grains called graphene sand composite (GSC) by using ordinary sugar as a carbon source. Physical morphology and chemical composition of GSC was examined by using (FTIR, SEM, EDAX and XRD). Efficiency of GSC in the adsorption of organic dyes from water was investigated using reactive green dye with different parameters such as (ph, temperature, contact time and dose). Adsorption isotherm was also studied and the results showed that the maximum adsorption capacity of dye is 28.98 mg/g. This fast, low-cost process can be used to manufacture commercial filters to treat contaminated water using appropriate engineering designs.

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