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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...
The hazardous substances listed in the EU Water Framework Directive (Directive 2000/60/EC of the European Parliament and of the Council establishing a framework for the Community action in the field of water policy) as priority and priority hazardous substances, HELCOM substances of specific concern to the Baltic Sea and some other pollutants which our team deemed potentially problematic for the Baltic...
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...
The contents of heavy metals, such as cadmium, chromium, copper, lead and zinc in surface sediments from the Pearl River Guangzhou Section were measured, that were classed as bio-available state, potential bio-available state and bio-unavailable state using Tessier method. Based on this, the absorbed possibility by aquatic organisms and the impacts on the aquatic ecosystems of these five heavy metals...
To find out heavy metal pollution in and ecological risks of the sediments in Daliaohe Estuary, 19 surface sediment samples were collected from Daliaohe Estuary and analyzed for contents of Cu, Pb, Zn and Cr. The Indices of Geo-accumulation and Mean Sediment Quality Guideline Quotient were employed to evaluate the pollution status and ecological risks. Similar results were obtained through these two...
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 pollution of Jiaozhou Bay was investigated by measuring the trace elements of surface sediments. Sediment samples were collected at 33 locations in Jiaozhou Bay in November 2003. The large-scale distribution pattern of metals in surface sediments showed elevated levels of Cd, Cr, Cu, Pb, Hg compared with values obtained in 1989. Concentrations of soil-related elements such as Al, Fe, Mn did not...
Spatial distribution of metal concentrations in the surface sediment samples collected from 19 marine at Guanhe estuary in Haizhou Bay, Lianyungang was studied. Heavy metal (Cu, Zn, Pb, Cd, Cr, As, Ni, Mn) concentrations were determined and geo-accumulation index (Igeo) was calculated to understand the pollution status of the study area based on the background values. The ranges of the measured concentrations...
Acid volatile sulfides (AVS) and simultaneously extracted metals (SEM) of 11 surface sediment samples collected from the Sea Area of the Yellow River Estuary were determined. The AVS, SEM, SEM-AVS and their distributions were analyzed. The result shows: AVS in the surface sediment of the sea area was between 0.152 and 1.847µmol/g (dry weight), with mean value being 0.935µmol/g (dry weight); SEM in...
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>;...
Effects of granulated red mud addition on the fractionation of Pb and Zn in soil and plants growth were studied by 2 batches of soil column incubation experiment(with and without leeks). Experimental results showed that all treatments with granulated red mud addition significantly decreased the concentrations of bio-available and Zn. Compared with the control, the treatment with5% granulated red mud...
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),...
Based on the investigating the inter-tidal water environment in Qinhuangdao section, the distribution characteristics of ammonia nitrogen, chemical oxygen demand, Zn, Cd and other metal elements in the water body and the pollution characteristics of Cu, Pb, Zn and Cd in surface sediment were studied. The results showed that Cd, chemical oxygen demand and ammonia nitrogen are the main pollutants in...
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...
Ten sites along the XiJiang River (WuZhou section), China were sampled to evaluate the copper (Cu), Zinc (Zn), lead (Pb), cadmium (Cd), and chromium (Cr) concentrations in sediments. The order of total metal concentrations in sediment samples was found to be Zn>Cu>Cr>Pb>Cd. The approach of Hakanson potential ecological risk index was used for the ecological risk assessment. Compared to...
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...
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