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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...
A zirconium hydroxide coprecipitation method for the determination of As, Cd, Ni, Mn, Fe, Pb, Cu and Co by inductively coupled plasma atomic emission spectrometry in waste water of feed additive zinc sulfate has been investigated. The coprecipitation conditions, such as the effect of the amount of zirconium solution, the aged time of precipitation, the enrichment factor and the possible matrix ions...
This study dealed with the distribution and the origin of trace elements (Co, Cd, Mn, Ni, Zn, Tl and Pb) in two soil profiles from a site near a plant roasting pyrite for sulfuric acid production. Chemical partitioning of the trace elements showed that Tl and Pb in each individual extractable fraction(i.e. weak acid exchangeable, reducible and oxidizable)presented increasing trend upward through the...
To study the spatial distribution characteristics of 10 heavy metals(As, Hg, Mo, Cd, Cr, Zn, Cu, Mn, Pb, Ti) in the soil of Dexing area, Semi-variance function is used to quantitatively describe the structural features of the spatial distribution and map the content distribution. The analysis shows, in addition to cadmium and lead, other elements fit relatively well, which reflects a good spatial...
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...
Most of the metal-based phases formed in the process of sludge incineration are toxic and their emissions need to be strictly controlled. The sludge incineration tests using tubular furnace were carried out to study the distribution of heavy metals under different operating conditions. The emphasis has been on the study of the behavior of the potentially most harmful metals present in the sludge in...
The concentration of eighteen nutrients and heavy metals in E. crassipes collected from different sites in the North Zhejiang, China was concurrently studied. The concentration of the elements in whole plants was in the order of K (14896.92 μg g-1)>P (5775.78 μg g-1)>S (5596.38 μg g-1)>Ca (2368.92μg g-1)>Pb (2380.03 μg g-1)>Mn (852.90 μg g-1)>Fe (782.63 μg g-1) >Al (456.26 μg...
130 wet deposition events were observed at the summit of Mt. Tai (East China, 1534 a.s.l) in China during Jan. 2005 to Dec. 2008. Zn, Al, Mn, Fe, Pb, Cu, Ni, Cr, As, and Cd were determined by ICP-MS to evaluate the characteristics of heavy metals in wet deposition at Mt. Tai region. The concentrations of these metals are generally higher at Mt. Tai than the concentrations observed at other monitoring...
Sludge can be used in agriculture as a fertilizer and soil conditioner. But heavy metals are one of the important factors affecting the sludge for agricultural purpose. In this study, the concentration of Zn, Cu, Pb, Cr, Mn and Ni in seven kinds of sludge from Guangzhou were analyzed and the chemical speciation of heavy metals in the five kinds of sludge were studied. The results showed that the concentration...
Soils and dominant plants were surveyed in the Siding mineland area. Based on the determination of heavy metal concentration of soil from 8 sections and 14 dominant plant species in different parts, the potential ecological risk was assessed using the Hakanson Index Method. The results indicated that the soil of Siding mineland area was seriously contaminated by Pb and Zn. The risk index values of...
The content of metal in the commercially soybean was investigated in Jinzhou City, Liaoning Province, such as Mn,Cu,Mg,Zn,Ca,Co,V,Pb,Cr and Cd. The sample was digested with nitrate and high-chlorine acid. The content of the metal was determined with atomic absorption spectrophotometry. The results showed that the content of Mn,Cu,Fe,Mg,Zn,Ca,Co and V was rich. While the content of Pb, Cr and Cd of...
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...
Combustion tests of the synthetic samples of household waste were carried out to investigate emissions of heavy metals and chlorine derived from plastics waste into bottom ash and fly ash. PVC, PP, PS, and PET were focused as typical plastics wastes in this study. Concentration distributions and leachabilities of Cu, Pb, Zn, Mn and Cl in bottom ash and fly ash were confirmed by XRF analyses and leaching...
Heavy metal pollution in mining areas possesses the character of grey system, so grey model GM (1, 1) can be used to predict heavy metal pollution. On the basis of heavy metal monitoring data in a certain sulfide mining area from 2006 to 2008, prediction models of copper (Cu), manganese (Mn) and lead (Pb) in mining areas have been built with grey model GM (1, 1) to predict heavy metal pollution contents...
For assessment on heavy metals environmental security in coal gangue, coal gangue samples were collected from Xinwen mineral area which lay in Shandong Province of China. Tessier extractive experiments were carried out to check the heavy metals' chemical species. Results showed that the chemical species of heavy metal distribution ranking sequence generally is residuahorganic combinative>Fe-Mn...
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...
In recent years, it draws people's attention to the high frequency of fog and haze. Shijiazhuang is a city where fog and haze have high frequency. This article takes the inhalant particles of fog and haze in the urban district in Shijiazhuang as the main research target, according to the data of the analyzed chemical elements in particles of fog and haze, four main sources of inhalant particles are...
PM2.5 was collected at Shanghai urban and suburban sites from April 2005 to March 2006. ICP-AES (inductively coupled plasma-atomic emission spectrum) was used to investigate mass concentration of 17 elements (K, Na, Ca, Mg , As, Cu, Zn, Pb, Cd, Cr, Al, Fe, Mn, Ba, Sr, Ni, Se) in whole sample and soluble fraction of Shanghai PM2.5. Our results claimed total elements in Shanghai PM2.5 increased gradually...
The release characteristics of Cd, Pb, Mn, Cu and Zn from coal-ash are investigated by the simulated acid rain. The soaking and leaching experiments were performed to test the heavy metals sensitivity to acidity and the releasing potential in different pH and time conditions. The heavy metals release content was measured by atomic fluorescence spectroscopy (AFS). The release ratio was calculated and...
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