Distribution of heavy metals in freshwater ecosystem of a small stream impacted by urban drainage

2006 ◽  
Vol 54 (6-7) ◽  
pp. 339-346 ◽  
Author(s):  
J. Nábělková ◽  
D. Komínková
Keyword(s):  
Heavy Metals ◽  
Laboratory Experiment ◽  
Aquatic Ecosystems ◽  
Distribution Coefficients ◽  
Field Monitoring ◽  
Freshwater Ecosystem ◽  
Urban Drainage ◽  
Small Stream ◽  
Bioaccumulation Coefficient ◽  
Toxicological Risk

This paper focuses on the study of heavy metals' remobilisation possibilities and changes of distribution coefficients leading to remobilisation in a stream as a result of changing conditions caused by urban drainage. The paper also reports consequent changes of bioaccumulation coefficient for different species of the benthic community, which seems to be the best indicator of aquatic community quality in small urban streams. The paper presents results obtained during field monitoring as well as results obtained during laboratory experiment. The field monitoring identified in the study area (the Botič Creek) three heavy metals (Cu, Zn and Pb), which are the main sources of toxicological risk in this area. Based on the monitoring, these elements were used for laboratory experiment, where their behaviour during changing conditions was studied. The experiment shows that changing conditions in the stream, caused by urban drainage, significantly impact the fate of heavy metals in aquatic ecosystems and that these elements have different preferences to bind to a particular geochemical fraction of sediment, which consequently means different bioavailability.

scholarly journals Heavy-metal pollution alters dissolved organic matter released by bloom-forming Microcystis aeruginosa

RSC Advances ◽  
2017 ◽  
Vol 7 (30) ◽  
pp. 18421-18427 ◽  
Author(s):  
Haiming Wu ◽  
Li Lin ◽  
Guangzhu Shen ◽  
Ming Li
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Microcystis Aeruginosa ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Aquatic Ecosystems ◽  
Eutrophic Lakes

The risk of heavy metals to aquatic ecosystems was paid much attention in recent years, however, the knowledge on effects of heavy metals on dissolved organic matter (DOM) released byMicrocystiswas quite poor, especially in eutrophic lakes.

Uranium Tailings Acidification and Subsurface Contaminant Migration in a Sand Aquifer

1984 ◽  
Vol 19 (2) ◽  
pp. 55-89 ◽  
Author(s):  
N.M. Dubrovsky ◽  
K.A. Morin ◽  
J.A. Cherry ◽  
D.J.A. Smyth
Keyword(s):  
Heavy Metals ◽  
Vadose Zone ◽  
Inner Core ◽  
Pyrite Oxidation ◽  
Outer Zone ◽  
Low Ph ◽  
Small Stream ◽  
Sand Aquifer ◽  
Uranium Tailings ◽  
Stream Bed

Abstract Investigations of the geochemistry of inactive pyritic uranium tailings in the Elliot Lake Mining district of Ontario have focused on the Nordic tailings management area, where two impoundments are located in natural bedrock basins. The tailings are 8-12 m thick and overlie a localized deposit of glaciofluvial sands. Analyses of the solid, liquid, and gas phases in the vadose zone of the tailings show that gas-phase oxygen levels drop rapidly within 0.7 to 1.5 m of the surface, indicating rapid oxygen consumption during pyrite oxidation. Oxidation during the past 15 to 20 years has caused a marked depletion of near-surface pyrite. The oxidation of pyrite in the vadose zone imparts to infiltrating precipitation high concentrations of Fe, SO42-, various heavy metals, and a pH generally between 1.5 and 4. The acidic infiltration moves downward at a rate of 0.2 to 2.0 m/yr, displacing high-pH groundwater that originated as process water discharged from the mill. It now occupies the entire tailings thickness over a small area of the tailings. At one location a well-defined plume of high-Fe2+ tailings-derived groundwater has developed in the sand aquifer adjacent to the tailings. The plume consists of three zones: an inner core characterized by Fe > 5000 mg/L, pH < 4.8, and elevated concentrations of several heavy metals and radionuclides; an outer zone with Fe < 2500 mg/L, pH > 5.5, and relatively low concentrations of heavy metals and radionuclides; and a transition zone separating the two. Although the average linear groundwater velocity is about 440 m/yr near the dam, reactions such as mineral dissolution, precipitation and coprecipitation retard the migration of the front of the inner core, producing an observed frontal migration rate of approximately 1 m/yr. Groundwater from the outer zone of the plume flows laterally towards a small stream, where a portion of it is now discharging into the stream bed. The discharge results in the precipitation of amorphous ferric hydroxide on the stream bed. Most of the H+ produced by Fe precipitation is buffered, and only a moderate decrease in stream pH is observed. Inner zone conditions will not reach the stream unless input of low-pH groundwater from the tailings continues for several hundred years. Although the rate of pyrite oxidation in the Nordic Main tailings has been decreasing, there is sufficient pyrite in the tailings to generate high-Fe groundwater for several decades or more. Calculated groundwater migration rates indicate that in the next few decades acidic, low-pH groundwater will occupy the entire tailings thickness over most of the tailings area, causing an increase in the total flux of contaminated groundwater into the underlying aquifer. The outer zone of the plume has already arrived at a small stream, and acidification of the surface waters may increase if the Fe concentration in the groundwater seepage increases.

scholarly journals Heavy metal removal from wastewater using various adsorbents: a review

2016 ◽  
Vol 7 (4) ◽  
pp. 387-419 ◽  
Author(s):  
Renu ◽  
Madhu Agarwal ◽  
K. Singh
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Aquatic Ecosystems ◽  
Adsorption Process ◽  
Metal Removal ◽  
Low Cost ◽  
Heavy Metal Removal ◽  
Review Article ◽  
Removal Capacity ◽  
Removal Of Heavy Metals

Heavy metals are discharged into water from various industries. They can be toxic or carcinogenic in nature and can cause severe problems for humans and aquatic ecosystems. Thus, the removal of heavy metals from wastewater is a serious problem. The adsorption process is widely used for the removal of heavy metals from wastewater because of its low cost, availability and eco-friendly nature. Both commercial adsorbents and bioadsorbents are used for the removal of heavy metals from wastewater, with high removal capacity. This review article aims to compile scattered information on the different adsorbents that are used for heavy metal removal and to provide information on the commercially available and natural bioadsorbents used for removal of chromium, cadmium and copper, in particular.

scholarly journals Microplastics in the diet of nestling double-crested cormorants (Phalacrocorax auritus), an obligate piscivore in a freshwater ecosystem

2019 ◽  
Vol 76 (11) ◽  
pp. 2156-2163 ◽  
Author(s):  
Cole B. Brookson ◽  
Shane R. de Solla ◽  
Kim J. Fernie ◽  
Monina Cepeda ◽  
Chelsea M. Rochman
Keyword(s):  
Great Lakes ◽  
Aquatic Ecosystems ◽  
Natural Fibres ◽  
Laurentian Great Lakes ◽  
Freshwater Ecosystem ◽  
Phalacrocorax Auritus ◽  
Marine Systems ◽  
Freshwater Systems ◽  
Diving Bird

Anthropogenic debris, namely plastic, is a concern across aquatic ecosystems worldwide, with freshwater systems being understudied relative to marine systems. In this study, we quantified and characterized debris in the diet of double-crested cormorant chicks (Phalacrocorax auritus) from three sites in two of the Laurentian Great Lakes to (i) determine whether or not the diet of double-crested cormorants in the Laurentian Great Lakes includes anthropogenic debris, (ii) characterize the size, shape, and type of debris incorporated, and (iii) examine relationships between the amount of debris ingested and their proximity to industrial–urban centres. Overall, >86% of cormorants in our study had anthropogenic debris (mostly fibers) in their digestive tracts with no correlation between site and the amount of debris ingested. The ingested debris includes microplastics, natural fibres from textiles, and other anthropogenic materials (e.g., glass). To the best of our knowledge, this is one of the first studies to examine anthropogenic debris in a diving bird in the Laurentian Great Lakes and one of few studies investigating this in freshwater birds.

Heavy metal uptake, bioaccumulation and histopathological responses in gills of freshwater fish from the Indus River, Pakistan

2009 ◽  
Vol 2009 ◽  
pp. 127-127
Author(s):  
F Jabeen ◽  
A S Chaudhry
Keyword(s):  
Heavy Metals ◽  
Aquatic Ecosystems ◽  
Nutritional Value ◽  
Metal Uptake ◽  
Health Concern ◽  
Pollution Potential ◽  
Indus River ◽  
Heavy Metal Uptake ◽  
Anthropogenic Pollutants ◽  
Balanced Diet

The high nutritional value of fish makes it an ideal component of a healthy and balanced diet. Elevated levels of heavy metals in fish represent both an ecological and human health concern. Fish species are often the top consumers in aquatic ecosystems and thus metal concentrations in fish can act as an indicator of the state of the aquatic environment. Fish are known to bio-accumulate metals and are considered as one of the most indicative factors, in freshwater systems, for the estimation of trace metals pollution potential (Rashed, 2001). Histopathology can be an indicator of the effects of various anthropogenic pollutants on organisms and so could be used as a reflection of the overall health of the entire population in an ecosystem. This study aimed to assess the bioaccumulation of heavy metals in gills and muscles and their effects on histopathology of gills of Oreochromis mossambicus from the Indus River, Pakistan which receives potential pollutants from the domestic, municipal and agricultural runoffs.

Occurrences and toxicological risk assessment of eight heavy metals in agricultural soils from Kenya, Eastern Africa

2016 ◽  
Vol 23 (18) ◽  
pp. 18533-18541 ◽  
Author(s):  
Teresiah Muciku Mungai ◽  
Anita Awino Owino ◽  
Victorine Anyango Makokha ◽  
Yan Gao ◽  
Xue Yan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Risk Assessment ◽  
Agricultural Soils ◽  
Eastern Africa ◽  
Toxicological Risk ◽  
Toxicological Risk Assessment

scholarly journals Effect of polluted water on soil and plant contamination by heavy metals in El-Mahla El-Kobra, Egypt

Solid Earth ◽  
2016 ◽  
Vol 7 (2) ◽  
pp. 703-711 ◽  
Author(s):  
Esawy Kasem Mahmoud ◽  
Adel Mohamed Ghoneim
Keyword(s):  
Heavy Metals ◽  
Cynodon Dactylon ◽  
Oxygen Demand ◽  
Polluted Water ◽  
Contaminated Water ◽  
Water And Sediment ◽  
Bioaccumulation Coefficient ◽  
The Mean ◽  
Very High ◽  
Irrigated Soils

Abstract. The discharge of untreated waste water in Zefta drain and drain no. 5 is becoming a problem for many farmers in the El-Mahla El-Kobra area, Egypt. The discharged water contains high levels of contaminants considered hazardous to the ecosystem. Some plants, soil, water, and sediment samples were collected from the El-Mahla El-Kobra area to evaluate the contamination by heavy metals. The results showed that the heavy metals, pH, sodium adsorption ratio (SAR), biochemical oxygen demand (BOD), and chemical oxygen demand (COD) in the water of Zefta drain and drain no. 5 exceeded permissible limits for irrigation. In rice and maize shoots grown in soils irrigated by contaminated water from Zefta drain and drain no. 5, the bioaccumulation factors for Cd, Pb, Zn, Cu, and Mn were higher than 1.0. The heavy metals content of irrigated soils from Zefta drain and drain no. 5 exceeded the upper limit of background heavy metals. In this study, the mean contaminant factor values of the drain no. 5 sediments revealed that Zn, Mn, Cu, Cd, Pb, and Ni > 6, indicating very high contamination. The bioaccumulation coefficient values of Cynodon dactylon, Phragmites australis, and Typha domingensis aquatic plants growing in Zefta drain are high. These species can be considered as hyperaccumulators for the decontamination of contaminated water.

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