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Base metals (Cu, Zn and Pb) as the main resources of the Lower Silesian copper deposits have significantly been influenced by different enviromentalfactors. In this paper, changes in metal concentrations on the surface in relation to deeper layers of the sediments were examined. The concentration ofmetals in the whole sediment, and in selected grain fractions was studied. The contents of these metals...
Aquatic organisms can easily accumulate heavy metals via water and sediment. The aim of this study was to analyze heavy metals distributions of water, sediment and organisms of the thirteen aquaculture ponds at the southwest coast of Taiwan. To evaluate accumulate metals ability of organisms through calculating the bioconcentration factor (BCF) and biota-sediment accumulation factor (BSAF). The concentration...
Dongjiang River Basin is the world's most populous and highly economic development region over last few decades. Heavy metal records of 51 representative points of the Dongjiang River were presented, aim to evaluate the expected water resources and to investigate the potential for improving our aquatic environment. We find, heavy metal concentrations of both water and sediments indicated a good level...
An extensive survey was conducted in surface sediments of Dongjiang River, Guangdong. This article adopted the method, index of geo-accumulation, to estimate the quality status of these metals. The results showed that Dongjiang was polluted by the some metal inorganic substances. The results of Principal Component Analysis ( PCA) showed that the heavy metals in the sediments of Dongjiang River came...
The concentrations of As, Cd, Ni, Cr, Zn, Cu, Hg and Pb in the sediment of Xiyi River were analyzed by flame atomic absorption spectrophotometer (AAS). The results showed the average concentration of total As, Cd, Ni, Cr, Zn, Cu, Hg and Pb in the sediment was higher than the national threshold limit. The values of pollution index and integrated pollution index showed that the pollution level was Cd>;...
The contents and characteristics of ten heavy metals in surface sediments from Yangzonghai Lake in Yunnan, China were analyzed. Ecological risk index presented by Håkanson to assess the potential ecological risk of Yangzonghai Lake was utilized. The results showed that the average concentrations of titanium(Ti), manganese(Mn), zinc(Zn), vanadium(V), chromium(Cr), copper(Cu), nickel(Ni), cobalt(Co),...
A set of sixty six surface sediment samples were collected from the beach area and its adjacent region in Central part of Tamil Nadu State, SE Coast of India. The samples were analyzed for organic carbon, carbonates, texture of sediments and Partially Extracted Trace Metals (PETMs) (As, Ba, Be, Cd, Co, Cr, Cu, Fe, Mn, Pb, Sr, V, Zn). The results indicate that the organic carbon and carbonates in the...
With the modified BCR sequential extraction method, the ultrasonic vibration and microwave digestion techniques were applied to extract heavy metal forms in sewer sediments. Considering the influence of extraction time, temperature, extractant concentration and the digestion types on the extraction efficiency, the optimal testing conditions of sediments pre-treatment were defined. Compared with the...
With the Tessier Five-step Continuous Extracting Method, the thesis studied the form distribution of heavy metals in the sediment samples collected from Mochou Lake, Xuanwu Lake and Qinhuai River in Nanjing, analyzed the correlation between leaching contents of heavy metals and various forms and between content of organic matter and leachability of heavy metals and between organic matter and organic...
The potential hazard of contamination directly depends on the presence and concentrations of mobile and biologically available element species. The mobility and availability of elements are known to depend on the chemical species of elements and the type of their bonding with the soil matrix. A three-step sequential extraction procedure (BCR-SEP) was used to determine the concentration of heavy metal...
The study was aimed at investigating the local plants along two sides of Dagu River to achieve guidance on the harness, remediation or management of Dagu River. For this, the herbage plant species and their covering area, heavy metal contents in the plants, and the correlation analysis between metals in local plants and in nearby sediments were investigated. Results indicate that the dominant plants...
Determination of optimal sampling transects and pollutants for river sediments are essential and valuable. To determine if the concentration of some metals were highly correlated, correlations between heavy metals (As, Pb, Cd, Cr, Hg, Cu, Ni and Zn) were analyzed using statistic analysis software (SAS) based on monitoring data of heavy metals along the whole watercourse sediments of Dagu River. To...
Three sediment short column cores were collected form Licun estuary of Jiaozhou Bay. Acid volatile sulfide (AVS) and simultaneously extracted metals (SEM, including Cu, Cd, Ni, Pb and Zn) were analyzed. The distribution characteristics and biological availability of heavy metals were studied. AVS contents in sediment samples ranged from 0.5μmol/g to 114.1μmol/g with an average value of 21.7μmol/g,...
Abstract- Column experiment simulations were carried out to determine potential metal ion migration in order to establish the environmental impact of a manganese mine wasteland and to understand the transport dynamics of heavy metal migration by way of two different soil types (tailings and tailings mud) within the Xiangtan Manganese Mine wasteland. Simulations were conducted at the Research Section...
South Taihu Lake used to get less attention in terms of environmental pollution study in the past. Sediment and fish samples were collected from South Taihu Lake in 2009. Heavy metals were measured for both types of samples and potential health risks were evaluated. Concentration of Cu, Zn, Cr and Ni were determined for sediments samples, and Cu, Zn, Ni, Fe and Mn were determined for fish samples...
Taking the main pollution source of sewage river in north China as study object, concentrations of ammonia, chemical oxygen demand and heavy metals in sources of pollution and nearby water are determined. The two dimension steady river water quality models of ammonia and chemical oxygen demand are established, and the geometric characteristics of pollutant zone at downstream of the pollution source...
The remains of zooplankton subfossil and sediment characteristics were examined from a macrophyte dominated shallow lake Wuliangsuhai in Inner Mongolia, China, in order to study past limnological changes. The lake began to switch to eutrophication gradually in the middle 1980s, creating a Transitional Sediment Layer (TSL, about 17 cm depth) that can be visually used to separate sediments derived from...
The distributions, contamination status and annual sedimentation flux of trace metals (Cu, Fe, Mn, Ni, Pb and Zn) in surface sediments of the East China Sea (ECS) were studied in the present work. The concentration ranges of trace metals in surface sediments of the ECS were as follows: Cu, 4.29-41.5 mug/g; Pb, 10-44.8 mug/g; Zn, 18.2-114 mug/g; Ni, 8.17-48.64 mug/g; Mn, 152- 1152 mug/g ; Fe, 0.62-3...
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