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 present paper proposes the application of sodium trititanate whisker as solid sorbent for trace cadmium pre-concentration/separation using a static system coupled with flame atomic adsorption spectrometry (FAAS). The method comprised the pre-concentration of Cd(II) ions at a buffered solution (pH 5.0) onto 0.25 g of sorbent previously activated by 3.0 mol/L of HNO3. The elution step was carried...
The water system of Fen River in Shanxi province has upstream, midstream and downstream three sections, which are separately located in Jingyou, Jiexiu, Xiaodian, Hongtong, Linfen and Hejin, six sampling points are disposed there for the sake of collecting the samples of the filtered water and suspended matter, and measuring heavy metal contents. The measurement results show that heavy metal exist...
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...
This is a Study on the Influence of Cadmium on the Growth of two Aquatic Plants and the Accumulative Capacity of the Plants towards Cadmium, cress and acorus. The results show: the growing state of both cress and acorus was good. In the view of total biomass, acorus presented a higher amount; in the view of biomass underground(root)/ above ground(Stems and leaves), the biomass underground and above...
An investigation was conducted on the characteristics and leaching behavior of heavy metals from municipal solid wastes incineration (MSWI) fly ash in Chongqing, China. Results indicated that the average particle size of the fly ash was 36.4 μm, the large particles were formed mainly by small particles' adsorption or aggregation. The total content of the main heavy metals was about 1.04% of the fly...
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 research reveals the relationship and enrichment of heavy metals in soil of sewage irrigation area in Guangdong province, southern China. Samples were collected from topsoil (0-10cm) and subsoil (30-40cm), and the total concentrations of heavy metals were extracted by HNO3-HF-HClO4. It is concluded that Cu, Zn, Cd, and Pb may be homologous or combined pollution, and Mn and Cr may be also homologous...
Heavy metal pollution is a worldwide problem. Phytoremediation is an effective and low-cost interesting technology. Sugarcane (Saccharum officinarum L.) could be a promising candidate for phytoremediation on metal-contaminated soils due to its high biomass, faster growth and moderate takeup and accumulation of heavy metals such as Cu, Cd, Se, Pb and Mn. As a follow-up processing of sugarcane, bagasse...
The cadmium adsorption and desorption by simulant acid rain on different clay minerals in soil have been discussed. When the pH value is 7, adsorption time is 1 h, and the medium is 0.05 mol.L-1 KNO3, the saturated adsorption capacity of cadmium on montmorillonite, illite, and sepiolite is found to be 2.88,1.08,2.82 mg/g respectively, but on kaolinite nothing is found. A correlation analysis shows...
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...
A new kind of Cd2+-adsorption material was prepared using maifan stone by composite modification with chemical and heat treatment methods. The modified maifan stones were characterized by SEM and EDS. Effects of the modified maifan stone content, contact time and the initial pH of the solution on the adsorption of Cd2+ were studied. The research results show as follows: 1) The composite modified maifan...
The influence of Cadmium(Cd) on exudation of low molecular weight organic acids (LMWOAs) were investigated based on the hydroponic culture experiment. Tartaric, citric, malic, and acetic acids were chosen as representatives of LMWOAs commonly present in roots exudation. We investigated the Cadmium accumulation in Zea Mays L.. In particular, the relationship of exudation of LMWOAs by roots with Cd...
Soil pollution is a worldwide problem. Both inorganic and persistent organic pollutants (POPs) possess high toxicity and long-term persistence. Biosurfactant based remediation technologies for contaminated soil are of increasing importance recently, and they have been demonstrated to be effective in uptaking both heavy metals such as Cd, Pb, Zn, Cu, and organic pollutants like hydrophobic organic...
The objective of this study is, basing on the geochemical survey project of agriculture land, to assess the pollution levels of heavy metal in agriculture soil in Weicheng town, Mianyang city. The pollution assessments to soil heavy metals are performed by introducing SF (single factor) and CF (combined factors) pollution index analysis. The evaluation shows that there are obvious differences of heavy...
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...
In this paper, flue-cured tobacco cultivar (Nicotiana tabacum L. K 326) was selected to explored responses of flue-cured tobacco plants to different concentration of lead (Pb) or cadmium (Cd). The plants were grown in nutrient solution in lab under the controlled condition. Research showed dry weights of each organ and whole plant and values of botany characters and Chlorophyll contents of upper leaf...
In this paper, the content and chemical speciation of a heavy metal element, Cd, were studied from 63 urban soil samples extracted from five different functional areas, Industrial Area, Commercial Area, Scenic Area, Agricultural Area, and Residential Area, of Qingdao. The analysis results indicated the Cd content in soil was 0.2211 - 3.040 mg/kg, with an average value of 1.289 mg/kg. The contamination...
The environmental impact of heavy metal pollution from mining activities is of growing concern. Here we have carried out an environmental geochemical investigation to determine the concentrations of heavy metals (Cd, Pb, Zn, and Cu) in soils in and around lead-zinc mining and zinc smelting areas in Northeastern China, analyze the characteristics of heavy metal contamination and assess pollution level...
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,...
The objective of this research was to determine the effect of Fe deficiency on the uptake of cadmium (Cd) by wheat (Triticum aestivum L.) in hydroponic culture. Results showed that Fe deficiency induced cadmium uptake, biomass decrease and changes of pH and Eh in hydroponic culture. Under Fe deficiency status, the decrease in pH and the increase in Eh might result in higher cadmium availability. Values...
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.