heavy metals in soils and their environmental significance

... yunjp@mail.sysu.edu.cn * Corresponding author Abstract Background: Tumor Protein p53 (p53), cyclin-dependent kinase inhibitor 1A (p21/WAF1), and murine double minute 2 (MDM2) participate in the regulation of ... found in malignant tumors and has been associated with poor prognosis. Our aim was to investigate the expression of the 3 proteins in hepatocellular carcinoma (HCC) and their prognostic significance. Methods: ... examined p53, p21/WAF1, and MDM2 expression in 181 pairs of HCC tissues and the adjacent hepatic tissues by performing immunohistochemistry and examined the expression of the 3 proteins in 7...

Ngày tải lên: 18/06/2014, 15:20

... MARSHES IN POLAND The second lead-containing wetland studied was the Biala River Marsh (Figure 1.5), 60 mi from Krakow, Poland where lead and zinc from mining and processing had been running into grassy ... Map showing the industries with lead and zinc wastes that drained into marsh wetlands around the Biala River, near Krakow, Poland. Note location in the Poland inset. Rudy 1 5 6 8 Mining Wastes ... Stasik Center for Environmental Policy and Center for Wetlands Environmental Engineering Sciences University of Florida Gainesville, Florida Heavy Metals in the Environment Using Wetlands for Their Removal ©...

Ngày tải lên: 18/06/2014, 19:20

... lead and other heavy metals bound in cycles of the land, keeping levels in the atmosphere, lakes, and oceans low. Is global toxicity ultimately due to letting heavy metals get into atmospheric and ... Understanding heavy metal toxicology also requires an understanding of these elements and their impact on the environment — the field of ecotoxicology. Some of the questions about heavy metals and ... circulation? 8. How can the use and processing of heavy metals by the economy make use of the natural principles guiding scarce elements? Public policies on mining and scarce minerals now are largely guided...

Ngày tải lên: 18/06/2014, 19:20

... drains. In 25 wetland soils in an area of heavy metal processing in Sudbury Ontario, Taylor and Crowder (1983) found little copper, zinc, nickel, or other heavy metals in leaves, although heavy ... ppm in natural arctic lakes to 3700 ppm in lakes near metal mining and 11,400 ppm in a Norwegian fjord receiving wastes. Furness and Rainbow (1990) review heavy metals in the sea, its algae, and ... lead workers including costs of replacing painted surfaces. SIMULATION MODELS OF HEAVY METALS Understanding of heavy metals in the systems of environment and human civilization has matured in the last...

Ngày tải lên: 18/06/2014, 19:20

... beneficial interactions. Human beings, their brains, and their information processing have higher emergy per gram and transformity than heavy metals. In a functioning organization, the humans, their ... great variety, adapting to various kinds of in ows of water, organic matter, sediments, and various chemicals, including the heavy metals. Many materials including heavy metals are captured and recycled ... 52 HEAVY METALS IN THE ENVIRONMENT: USING WETLANDS FOR THEIR REMOVAL shows a simplified model of the main units of the earth, with the ocean and atmosphere on the left and land formation and...

Ngày tải lên: 18/06/2014, 19:20

... lead in the wetland by Shanshin Ton and Howard T. Odum. L1401-frame-P2 Page 69 Monday, April 10, 2000 9:32 AM © 2000 by CRC Press LLC 78 HEAVY METALS IN THE ENVIRONMENT: USING WETLANDS FOR THEIR ... exposed, measured September 24, 1990 and monitored again June 6, 1991. In the interim there were very high water levels because of heavy rains. Since wetland tree seedlings die if covered with water, ... 72 HEAVY METALS IN THE ENVIRONMENT: USING WETLANDS FOR THEIR REMOVAL TOXICITY ASSESSMENT WITH PLANTED TREE SEEDLINGS Tree seedlings (pond cypress, bald cypress, and swamp black...

Ngày tải lên: 18/06/2014, 19:20

... LLC 84 HEAVY METALS IN THE ENVIRONMENT: USING WETLANDS FOR THEIR REMOVAL LEAD IN VEGETATION Water lily ( Nymphaea odorata ) was the most popular species for the entire wetland, except ... WETLANDS FOR THEIR REMOVAL LEAD IN SURFACE WATERS Lead concentrations in surface waters decreased downstream (Figure 6.2). Concentrations in most samples were less than those reported in earlier ... phosphate; inorganic precipitated lead with EDTA; sulfide lead with nitric acid; and residual lead. Results are given in Appendix A6 B , Table A6 B .9 and Figure 6.5. BINDING OF LEAD...

Ngày tải lên: 18/06/2014, 19:20

... EXPERIMENTS WITH LEAD AND ACID IN WETLAND MICROCOSMS 89 were not toxic to the two species of swamp trees predominant in this area. Cypress and gum require bare swamp soils for germination and regeneration. ... microcosm is a small ecosystem developing in a container. In this experiment peaty materials and a seeding of life from the outdoor swamp were placed in each container and allowed to develop for 2 months. ... Seedlings were added, and the microcosms were arranged at random in a greenhouse. Arrangements were made for chemical solutions containing lead and acid in different concentrations to drip into...

Ngày tải lên: 18/06/2014, 19:20

... material and energy. Crossing the boundary into the swamp systems are the flows of sunlight, the wind, and the in ows of water carrying lead. The water in ow includes stream and the rain. Outflows ... minus that in use. Water flowing out is the in owing water minus evaporation minus plant transpiration. Lead flowing out is the lead flowing in plus the recycle minus that taken up by plants and by ... concentration in the water and to the quantity of organic sediments) minus the lead in the organic matter consumed minus the lead in organic matter in water flowing out minus that going into buried...

Ngày tải lên: 18/06/2014, 19:20

... AND ZINC RETENTION IN THE BIALA RIVER WETLAND OF POLAND 103 Zinc and lead in wetland soils were compared with soils of the adjacent region (Figure 9.7). Concentrations of metals in the vicinity ... LLC 104 HEAVY METALS IN THE ENVIRONMENT: USING WETLANDS FOR THEIR REMOVAL Figure 9.7 Lead content in parts per million in soils of uplands surrounding the Biala Riv er wetland. Wetland 200 200 200 200 200 200 ... of wetland plants to high concentrations of heavy metals in their tissues as well as in soil. This chapter presents the results of investigations of these heavy metals in the wetland and the...

Ngày tải lên: 18/06/2014, 19:20

... Lead and Zinc Manufacturing, and Environment Wlodzimierz Wójcik CONTENTS Lead and Zinc Ores Processing 116 Consumption of Lead and Zinc 117 Environment Pollution from Lead and Zinc in Poland ... declining. The Boleslaw mine shut down in 1996, and shutdown is planned for two additional mines: the Trzebionka mine in 2005, and the Olkusz mine in 2010. The largest mine (Pomorzany mine) will ... some zinc–lead mines. Zinc in Poland is found mainly in the Silesia-Cracovian dolomite formation with an estimated 8.39 E6 tons. Average concentration of zinc in these ores is 3.9%. Decreases in zinc...

Ngày tải lên: 18/06/2014, 19:20

... economic costs incurred in this wetland use. The financial cost of the loss of standing timber from the wetland was calculated from the amount of wood in tree boles in the standing stock in the reference ... THE ENVIRONMENT: USING WETLANDS FOR THEIR REMOVAL recognized as part of the economy through their work in filtering toxic substances such as heavy metals. Increasingly, wetlands have been found ... first in emergy terms and then in dollars. Lead Filtered by the Wetland The amount of lead retained in on-site wetlands and in Steele City Bay was estimated based on data in Watts (1984) and...

Ngày tải lên: 18/06/2014, 19:20

Ngày tải lên: 18/06/2014, 19:20

Ngày tải lên: 18/06/2014, 19:20

Ngày tải lên: 18/06/2014, 19:20

Ngày tải lên: 18/06/2014, 19:20

... investment in waste- treatment-systems. Research and Development projects should also be invested in to find out the best technologies for reducing abatement cost and increasing the effect and efficiency ... 2.4. Financial difficulties Up to April 2003, 61 hospitals in Vietnam (7%) had incinerators. Most incinerators were very expensive. They operated erratically and inefficiently. Incinerators ... together with Ministry of Science, Technology and Environment, Ministry of Planning and Investment, have invested the matter in various hospitals and submitted the project of constructing “the centre...

Ngày tải lên: 23/09/2012, 15:38

Ngày tải lên: 26/11/2013, 13:17

Ngày tải lên: 26/11/2013, 13:18