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There exist the interaction between lake and ambient rivers. This study focuses on the total and bioavailable concentrations of trace elements in river sediments around the northern Taihu Lake. We can recognize the characteristics of trace elements in different sites by comparing the west, north and the east rivers and evaluate the contamination level of sediment. The concentrations of TP and TN in...
By analysis of the spatial distribution of heavy metals in surface soil in Fuzhou, we found the soil have been contaminated in different levels, especially for contents of Pb, Zn, Cr in all the sample points far exceeded Background value in soil of Fujian Province. Some pro-sulfur and pro-iron elements have similar properties, so their variation of contents show good correlation. The features of the...
Based on field investigation and indoor analysis, distribution characteristics of four available trace elements, including Cu, Fe, Mn, Zn, in the terrace land in loess region, was studied. Results indicated that, these four available trace elements distributed unevenly across soil profile, and its variation coefficient was high, which reached medium and high level. Distribution trends of these four...
The object of this paper was carried out to detect distribution characteristics of two important heavy metal-Cu, Pb in surface sediment in Huangpu River which is the main stream situated in Shanghai city. All the 30 samples were classified into four types corresponding to the sediments from spring, summer, autumn and winter in 2006, respectively. The concentration of Cu and Pb in surface sediment...
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),...
The research reveals the mobility and distribution of heavy metals (Cd, Cu, Zn, Mn, Ni, and Cr) in soil of sewage irrigation area in Pearl River Delta. Samples were collected from topsoil (0-10cm) and subsoil (30-40cm), and the total concentration and available concentration of heavy metals were extracted by HNO3-HF-HClO4 and DTPA respectively. The mean total concentrations for all of the heavy metals...
Environmental quality of reclaimed soil is a key issue in the process of land construction and ecology rehabilitation. Taking Xinzhuangzi and Datong reclamation district for example, according to Nemerow Pollution Index Method, results show that: In all 30 soil samples, 28 samples are I class level, clean; 1 sample is II class level, slightly clean; 1 sample is III class level, polluted slightly....
Nutrient has been considered to be undoubtedly one of the key factors stimulating algae growth. By a series of experiments the relationship between nutrient elements and phytoplankton growth was explored in three lakes: Lake Yezhihu, Lake Tangxunhu and Lake Nanhu, located in Wuhan City, China. We undertook 5 days in-site incubation experiments in the late April, 2007. The results showed that the chlorophyll...
Five elements (iron, manganese, copper, zinc and lead) in three surficial sediments (SSs) and three natural surface coating samples (NSCSs) from the Songhua River, northeast of China were analyzed with the modified sequential extraction procedure (MSEP) to compare the metal distribution and bioavailability in the two solid phases. The results indicated that Cu was present mainly in the bound to organic...
Farmland soil in the suburb is polluted to some degree due to the effect of human activities. In this paper spatial distribution and pattern of copper (Cu), lead (Pb) and zinc (Zn) contents in the farmland soil in suburb of Harbin were analyzed using geostatistics methods. Results of semivariance fitness models showed that contents of Cu and Zn were auto-correlated to a high degree respectively, while...
This investigation was conducted to understand the spatial variability and distribution of trace metals in soil by using geostatistics combining with GIS. Chongming island of Shanghai, the world biggest narrow and long alluvial island was selected as the study area. The most spatially auto-correlated lag sizes and appropriate analytic scale were explored from detailed investigation for each factors...
At a stage of rapid economic development and urbanization in China, most cities are faced with such serious problems caused by environment deterioration as pollution, space press, afforestation degradation and disordering. Kunshan City, one of the most economically vigorous regions in China, has suffered a more prominent confliction between urbanization and environmental safety. In this paper, urban...
The Simulation of heavy metal contamination in surface soils has been discussed in the paper. Instead of the acquisition of the ldquobestrdquo estimation of unsampled points, the author paid much attention to the assessment of the spatial uncertainty about unsampled values. The simulation method of Geostatistics, aimed at the same statistics (histogram, Variogram), can generate a set of equally-probable...
Dexing mines located in the east of China. They have been exploited for more 20 years and the environment pollution in this area has become very severe. It is very important to assess the spatial-temporal variation of regional environment contamination for monitoring the environment quality variation and contamination trend. 330 Sediment samples in Dexing region were collected and analyzed for As,...
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