The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
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 efficiency of electrokinetic remediation of Cu contaminated groundwater was researched by means of experiments for the complicated remediation of groundwater contaminated by typical heavy metal in this paper, and migration and variation characteristics of Cu was analyzed too. The experimental results indicated that the pH value varied obviously during the electrokinetic remediation because of...
The present study was conducted to investigate the heavy metals (HMS) removal from aqueous solutions in Complex ecosystem filter (CEF) with vermiculite substrate. Experimental results showed that the CEF was highly effectively in removal of HMS and the average removal rates of Cu2+, Zn2+, Pb2+ and Cd2+ were 81.60%, 80.55%, 83.20% and 62.21% respectively, under the hydraulic loading of 2.0m3/m2.d....
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...
Twelve samples of surface sediment in Nanhu Lake, Wuhan city were collected and the concentrations of Organic Matter (OM), Total Nitrogen (TN), Total Phosphorus (TP), ammonia nitrogen (NH4+-N) and nitrate nitrogen (NO3--N) were determined; the average result were 6.58%, 3972, 1712, 897 and 20mg/kg separately. Cd, Hg, As, Cu, Pb, Cr and Zn were determined too; and the average value were 0.46, 0.140,...
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...
A series of urban wastewater in one WWTP of Xi'an, China was picked to investigate the mechanism of representative heavy metals removal by the wastewater treatment plant (WWTP). Under determine the six different heavy metals(Cu, Zn, Mn, Cr, Hg, As) and SS concentrations of the effluent of the fine screen, sand chamber, oxidation ditch and secondary sedimentation settler, it is wished to find the kinetics...
The research reveals the distribution and correlation of heavy metals in groundwater of sewage irrigation area in Guangdong province. 14 groundwater samples were collected in August 2008, and the groundwater samples were filtrated through 0.45 μm membranes and acidified in the field. Determinations of Cd, Cu, Zn, Pb, Ni, and Cr in all the samples were performed using ICP-OES, and determinations of...
The South Taihu Lake receive localized metal pollution from the factories nearby. The aim of this study was to find out the heavy metal accumulation in South Taihu Lake. Concentration of some heavy metals (Cu, Zn, Cr, Ni, Pb, Cd) were determined in sediments samples. Heavy metal levels were analyzed by ICP. Concentrations varied significantly from different sampling sites. The results showed that...
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...
Taking the Beitang and Dagu Sewage Discharge Channels in Tianjin, China, as study objects, concentrations of heavy metals and organic matter are determined in upper layer, middle layer and lower layer sediment samples. Geo-accumulation index method and correlation analysis are taken to study the distribution and pollution level of metals between layers in the two channels contrastively. The results...
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...
Batch experiments were carried out to investigate heavy metal ions adsorption properties of steel slag, the results showed that steel slag could be used as an effective adsorbent to removal heavy metals such as Cr3+,Cu2+,Pb2+and Zn2+ from the aqueous solution. For the heavy metal Cr3+, the removal yield increased with increasing contact time and reached the equilibrium state within lh; The removal...
The acute and chronic toxicity experiments were conducted towards D. magna for five heavy metals, namely Hg, Cd, Cu, Pb and Cr, existing in single or mixture. The single results suggested that Hg was the most toxic, and then Cd, Cu, Pb and Cr in turn. The joint experiments indicated that toxicity for all mixtures were synergistic to D. magna using toxic units (TUs) and additional index (At). For more...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.