scholarly journals Monitoring of some dissolved heavy metals in surface waters of north-west Croatia from year 2016 to 2018

2020 ◽  
Vol 7 (2) ◽  
pp. 56-62
Author(s):  
Patricia Mlinarić ◽  
Nikola Sakač ◽  
Anita Ptiček Siročić ◽  
Irena Tomiek
Keyword(s):  
Heavy Metals ◽  
Surface Waters ◽  
Water Samples ◽  
Negative Impact ◽  
North West ◽  
Copper Nickel ◽  
Dissolved Heavy Metals ◽  
Nickel Manganese

Heavy metals have a negative impact on environment and wildlife. In waters, heavy metals appear in two forms, as dissolved and bioavailable; and as solid and non-soluble. We monitored the concentration of dissolved copper, nickel, manganese and iron in water samples at five river locations of north-west Croatia from 2016 to 2018. Concentrations of dissolved nickel measured at Melačka river, near Vularija in Međimurje county and HE Čakovec dam, near Štefanec in Međimurje county were below 5 µg/l and could be considered as not polluted. Concentrations of dissolved copper measured at Plitvica river, near Zbela in Varaždinska county and Horvatska, near Veliko Trgovišće in Krapinsko-Zagorska county were mostly below 5 µg/l and could be considered as not polluted. At Kosteljina river near Jalšje at the Krapinsko-Zagorska county concentrations of dissolved copper were mostly below 5 µg/l; concentrations of dissolved manganese and iron were higher especially during second part of the year, with some fluctuations. For this reason, Kosteljina river could be considered as medium polluted.

scholarly journals LEVELS OF HEAVY METALS IN SEVERAL RIVERS OF THE WESTERN BUG AND DNIESTER BASINS IN THE LVIV REGION (WESTERN UKRAINE)

10.23856/3501 ◽  
2019 ◽  
Vol 35 (4) ◽  
pp. 11-18 ◽  
Author(s):  
Halyna Antonyak ◽  
Marta Lesiv ◽  
Natalia Panas ◽  
Stepan Yanyshyn
Keyword(s):  
Heavy Metals ◽  
Surface Waters ◽  
Water Samples ◽  
Environmental Problems ◽  
Anthropogenic Load ◽  
Degree Of Contamination ◽  
Metal Concentrations ◽  
Catchment Areas ◽  
Western Ukraine

Lviv region, one of the most urbanized and industrialized regions of Western Ukraine, faces environmental problems, including pollution of surface waters. The study was aimed to investigate the levels of heavy metals (Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn) in the waters of three tributaries of the Western Bug River (Poltva, Rata and Kamyanka), as well as in the Dniester River and its two tributaries (the Zubra and Vivnya rivers) within the Lviv region. The results show that the degree of contamination of the Western Bug tributaries with heavy metals is considerably higher at the mouths of the rivers compared to river sources. In particular, metal concentrations at the mouth of the Rata River were 1.23–3.98 times higher than at its source, while water samples at the mouth of the Kamianka River were characterized by higher levels of Fe, Mn, Zn and Cd (2, 12–6.55 times) compared with the source of the river. Concentrations of several heavy metals, especially Fe, exceeded the maximum allowable levels in the waters of the analyzed rivers. Results of the study suggest a significant anthropogenic load in the catchment areas of the analyzed rivers within the Lviv region.

scholarly journals Metal fluxes in the Mersey Narrows

2001 ◽  
Vol 5 (1) ◽  
pp. 103-118 ◽  
Author(s):  
J. A. Cole ◽  
K. Whitelaw
Keyword(s):  
Heavy Metals ◽  
Water Samples ◽  
Suspended Solids ◽  
Quality Data ◽  
Tidal Range ◽  
Dissolved Metals ◽  
Cross Sectional ◽  
Water Quality Data ◽  
North West ◽  
Mersey Estuary

Abstract. Surveys of the Mersey estuary in north-west England were undertaken near the mouth of the estuary in the region known as the Mersey Narrows. Tidal fluxes of suspended and dissolved matter, particularly heavy metals, through the Mersey Narrows were investigated. This paper gives results of conducting four intensive cross-sectional surveys of the Narrows, during which currents, salinities, turbidity and water samples were obtained systematically at numerous positions, throughout selected tidal cycles. Over 300 water samples per survey were analysed to yield suspended and dissolved concentrations of the elements As, Cd, Cr, Cu, Hg, Ni, Pb and Zn, at all states of the tide. Suspended solids, concentrations and salinities were also measured. Suspended particulates account for the majority of each element present, except for cadmium, which was present in roughly equal dissolved and suspended fractions. From the tidal current and water quality data, calculations were made of hour-by-hour fluxes of each component, to show the detailed ebb and flow of heavy metals and the net tidal transport of each component. Although some differences between landward transport on the flood tide and seaward transport on the ebb were not significant, the more definite results consistently showed a seawards net transport. For spring tides of high tidal range, there was an indication of an opposite tendency, reducing the seawards transport or even reversing it, for certain suspended components. Keywords: Mersey estuary, surveys, tidal flux, dissolved metals, particulate metals, salinity, suspended particulate matter, suspended solids

scholarly journals Physicochemical Characterization of Mining Waste from the Betare-Oya Gold Area (East Cameroon) and an Adsorption Test by Sabga Smectite (North-West Cameroon)

Scientifica ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Mambou Ngueyep Luc Leroy ◽  
Mache Jacques Richard ◽  
Ayiwouo Ngounouno Mouhamed ◽  
Takougang Kingni Sifeu ◽  
Abende Sayom Reynolds Yvan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Samples ◽  
Suspended Solids ◽  
Physicochemical Characterization ◽  
Mining Waste ◽  
Operating Conditions ◽  
Sediment Samples ◽  
North West

This paper, firstly, characterizes the mining waste of the Betare-Oya gold area (East Cameroon). Surface waters are sampled and characterized physically (pH, electrical conductivity, turbidity, and suspended solids) and chemically by the determination of trace metals (Cu, Zn, Ni, Mn, Fe, Cr, As, and Pb). The concentrations of heavy metals in sediment samples are determined by X-ray Fluorescence Spectrometry (XRF) analysis. The statistical analysis tool is used to determine the existing correlation between the different physicochemical parameters. Secondly, an adsorption test for heavy metals determined is carried out on smectic clay of Sabga (North-West Cameroon) at ambient temperature. The results of physicochemical characterization of water samples reveal that waters of this gold mining zone are slightly acidic to neutral (6.3 pH < 7.1), mineralized (18.54 EC < 43 μs.cm−1), turbid (60 SS < 237.67 NTU), and polluted by suspended solids (50.5 < SS < 666.6 mg L−1).The determination of heavy metals in water samples shows that manganese, iron, arsenic, and lead concentrations are above the World Health Organization (WHO) limits. This indicates pollution. High concentrations of heavy metals as Cu, Ni, Mn, Fe, and Cr are observed in sediment samples. The correlation analysis indicates high correlations between turbidity and suspended solids; cadmium and lead in water samples; and copper and iron in sediment samples. The adsorption test reveals that the maximum percentage removal is 60, 89, 55, −89.74, and 100% for Cu, Zn, Mn, Fe, and Pb, respectively, after adding 0.5 g of Sabga smectic clay. This clay has a good potential adsorption of lead, zinc, manganese, and copper. However, the operating conditions favored desorption of iron.

scholarly journals Iğdır İli Çiftlik Hayvanı İçme Suyu Mineral İçeriklerinin Araştırılması

2020 ◽  
Vol 8 (12) ◽  
pp. 2677-2682
Author(s):  
Başaran Karademir ◽  
Evren Koç ◽  
Yusuf Ziya Oğrak ◽  
Tuncay Tufan ◽  
İbrahim Hakkı Kadirhanoğulları
Keyword(s):  
Heavy Metals ◽  
Water Resources ◽  
Surface Waters ◽  
Water Samples ◽  
Animal Husbandry ◽  
Water Source ◽  
Central District ◽  
Mineral Levels ◽  
First Time ◽  
Aras River

With this research, it was aimed to investigate the content of some heavy metals (Cu, Zn, Fe, Mn) and macro minerals (Mg, Ca, K, Na) in the water resources that meet the water needs of livestock in Iğdır. Water samples were collected from natural springs, surface waters, wells and drilling waters, Aras river and its branches in the region. The data obtained were classified in two different ways and statistical analysis was performed. 1. According to the districts; Central District, Tuzluca, Karakoyunlu, Aralık. 2. According to the type of water resources; Ağrı Mountain spring waters, Ağrı Mountain surface waters, Mountain spring waters, Mountain surface waters, west of Aras river and it’s canals, east of Aras river, Well and Drilling waters. Mineral levels of the water samples were measured by using Atomic Absorption Spectrometer with flame system. According to the district assessment, it was seen that Tuzluca district had lower values compared to other districts. When evaluated according to the type of water source, water mineral content was determined to increase as the waters flowing forward on the surface after reaching to the earth surface It was even found to have become unfit for consumption towards the end. Consequently, with this research, the levels of some heavy metals and macro minerals in the waters used for livestock in the Iğdır region were revealed for the first time with their details. Except for the waters of the East Aras river, the waters of the Iğdır region were found to be of usable quality for animal husbandry.

scholarly journals Distribution of Selected Dissolved and Particulate Heavy Metals in Lake Kenyir, Malaysia

2021 ◽  
Vol 37 (6) ◽  
pp. 1307-1316
Author(s):  
Royston Uning ◽  
Fatin Adlina Md Nasir ◽  
Suhaimi Suratman
Keyword(s):  
Heavy Metals ◽  
Surface Waters ◽  
Anthropogenic Activities ◽  
Quality Standard ◽  
Untreated Sewage ◽  
Particulate Form ◽  
Bottom Waters ◽  
Dissolved Heavy Metals ◽  
The Mean ◽  
Dissolved Form

This study was conducted to determine the concentration and possible sources of dissolved and particulate heavy metals in Lake Kenyir, Terengganu, Malaysia. The heavy metals studied included Cd, Fe, Pb, Zn and Cu. The findings indicated that the mean concentrations found in the dissolved form for surface waters were in decreasing order of Fe>Zn>Pb~Cu>Cd. A similar trend was also recorded for the particulate form i.e., Fe>Zn>Pb~Cu>Cd. In terms of vertical distribution, most of the heavy metals showed a trend of increasing concentrations from the surface to the bottom waters. The main sources of heavy metals were from anthropogenic activities such as discharge of untreated sewage, surface runoff and boat activity. However, the levels of dissolved heavy metals were still lower compared to other study areas in Malaysia. The dissolved heavy metal concentrations were equivalent with Class II based on the National Water Quality Standard for Malaysia.

HEAVY METAL POLLUTION STUDIES OF SUSPENDED SEDIMENTS IN WAIWHETU STREAM WATER BY PIXE

2002 ◽  
Vol 12 (03n04) ◽  
pp. 189-197 ◽  
Author(s):  
V. J. KENNEDY ◽  
A. MARKWITZ
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Surface Waters ◽  
Water Samples ◽  
Stream Water ◽  
Analytical Techniques ◽  
Suspended Sediments ◽  
Industrial Wastes ◽  
Industrial Sites ◽  
Elemental Concentrations

PIXE measurements on filtered water samples were conducted to investigate the possibility of using nuclear based analytical techniques to measure elemental concentrations of heavy metals in suspended sediments in the Waiwhetu Stream (Lower Hutt, New Zealand). It was found that most of the elements detected have a concentration of around 100 ppm by weight with 10 percent variation. Heavy metals like Cu , Zn , Pb and Cd were also present at higher than normal concentrations in the stream. Previous studies of the sediments collected from the Waiwhetu stream had showed that high levels of heavy metals were present at locations close to industrial sites, Nowadays, industries are no longer permitted to dump their waste into the stream. However, high-levels of heavy metals were found to be still present in the water samples indicating that these elements are slowly washed out of the sediments into the surface waters. The present results of Waiwhetu stream water samples revealed that heavy metals are distributed throughout the stream indicating that industrial wastes from industry discharges still linger after 30-40 years.

The role of production and non-production factors in the formation of male mortality (on the example of two Arctic single-industry towns)

2020 ◽  
Vol 60 (11) ◽  
pp. 738-741
Author(s):  
Maria S. Bryleva
Keyword(s):  
Negative Impact ◽  
Well Being ◽  
Malignant Neoplasms ◽  
Male Mortality ◽  
Occupational Factors ◽  
Copper Nickel ◽  
Production Factors ◽  
Single Industry ◽  
Working Age ◽  
Quality Of Medical Care

Introduction. One of the priority socio-economic and medical-demographic problems in Russia is the high mortality. The study aim is to identify the most significant factors that determine the mortality on the example of two single-industry towns. Materials and methods. Mortality in two single-industry towns specializing in copper-nickel production, differenced in climate, environmental, and socio-economic indicators, was studied using age-standardized indicators averaged over 8 years (2010-2017). Results. In Monchegorsk, compared to Russia, with similar non-production characteristics, working-age mortality from cardiovascular diseases (CVD) was higher by 49.0%, from malignant neoplasms (MN) by 34.7%, from diseases of the digestive system by 35.5%, which confirms the negative impact of occupational factors on the mortality of the population of a single-industry city. In Norilsk city, with the worst characteristics of the environment and climate, compared to Monchegorsk, mortality from CVD was lower in working age by 40.6%, in post-working age by 41.4%; from MN - in working age lower by 37.2% that shows the compensating influence of socio-economic factors on mortality. Conclusion. Risk factors for increased mortality rates in single-industry towns with copper-nickel enterprises are the influence of harmful occupational factors, as well as environmental pollution. Along with primary prevention, an effective mechanism for reducing mortality is to improve socio-economic well-being, and the quality of medical care.

scholarly journals Spatial Variation of Water Chemistry in Aries River Catchment Western Romania

2021 ◽  
Vol 11 (14) ◽  
pp. 6592
Author(s):  
Ana Moldovan ◽  
Maria-Alexandra Hoaghia ◽  
Anamaria Iulia Török ◽  
Marius Roman ◽  
Ionut Cornel Mirea ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Water Chemistry ◽  
Water Samples ◽  
Mine Drainage ◽  
Pollution Indices ◽  
Mining Activities ◽  
River Catchment ◽  
High Concentrations ◽  
The Impact

This study aims to investigate the quality and vulnerability of surface water (Aries River catchment) in order to identify the impact of past mining activities. For this purpose, the pollution and water quality indices, Piper and Durov plots, as well vulnerability modeling maps were used. The obtained results indicate that the water samples were contaminated with As, Fe, Mn, Pb and have relatively high concentrations of SO42−, HCO3−, TDS, Ca, K, Mg and high values for the electrical conductivity. Possible sources of the high content of chemicals could be the natural processes or the inputs of the mine drainage. Generally, according to the pollution indices, which were correlated to high concentrations of heavy metals, especially with Pb, Fe and Mn, the water samples were characterized by heavy metals pollution. The water quality index classified the studied water samples into five different classes of quality, namely: unsuitable for drinking, poor, medium, good and excellent quality. Similarly, medium, high and very high vulnerability classes were observed. The Durov and Piper plots classified the waters into Mg-HCO3− and Ca-Cl− types. The past and present mining activities clearly change the water chemistry and alter the quality of the Aries River, with the water requiring specific treatments before use.

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