Heavy metals

Xem 1-20 trên 261 kết quả Heavy metals
  • Characterizing the nature of heavy metal release reactions, sorption mechanisms, and movement in the soil is the main topic of this book. Because soils are heterogeneous, heavy metals in soils can be involved in a series of complex chemical and biological interactions including oxidation-reduction, precipitation and dissolution, volatilization, and surface and solution phase complexation. The heterogeneous nature of the different soil constituents adds to the complexity of interactions of heavy metal species with the soil environment....

    pdf0p 951628473 07-05-2012 65 23   Download

  • Cadmium is a heavy metal and a pollutant that can be found in large quantities in the environment from industrial waste. Its toxicity for living organisms could arise from its ability to alter thiol-containing cellular com-ponents. Glutathione is an abundant tripeptide (c-Glu-Cys-Gly) that is described as the first line of defence against cadmium in many cell types.

    pdf11p mobifone23 08-01-2013 22 2   Download

  • Selective fractionation was applied to partition of heavy metals in river sediment of the rivers Nhue and Tolich Hanoi’s outskirts. The observed results showed a considerable difference of the proportion of various fractions of studied heavy metals. The residual fraction of Cu, Pb, Zn, Cd, Cr, and Ni stayed the highest portions. The portions/percentages of Cu, Pb, Zn, Cd as carbonate fractions were comparatively higher than those as Fe-Mn oxide fractions and organic fractions.

    pdf6p uocvong04 24-09-2015 8 2   Download

  • In this study, we investigated the adsorption capacity of melanin extracted from the ink sacs of squids toward heavy metals (chromium and manganese), which normally presented at high concentrations in water sources originated from mining, metal plating and steel making industries, as well as bacteria in aqueous solution.

    pdf8p nguoibakhong02 06-10-2017 13 1   Download

  • In this study we have used 5 plant spieces (water lettuce - Pistia stratiotes, water hyacinth - Eichhornia crassipes, duckweed - spirodela polyrhiza, azolla - Azolla caroliniana and umbrella sedge - Cyperus involucratus) that were cultured in West lake’ water, to explore the capability of absorbing heavy metals of these plants.

    pdf6p nguoibakhong02 06-10-2017 68 1   Download

  • The aim of this study was to investigate the effects of metal accumulation on the variation of glutathione S-transferase (GST) activities in some fishes (Cyprinus carpio L, Hypophthalmichthys molitrix, and Oreochromis niloticus) in Nhue-Day river basin. Samples for analysis were taken four times from September 2012 to July 2013.

    pdf13p nguoibakhong02 06-10-2017 66 1   Download

  • Our global environment now consists of numerous natural and artificial metals. Metals have played a critical role in industrial development and technological advances. Most metals are not destroyed; indeed, they are accumulating at an accelerated pace, due to the ever-growing demands of modern society. A fine balance must be maintained between metals in the environment and human health. It is with this view in mind that this book has been written to address diverse issues surrounding heavy metals in the environment.

    pdf682p crazy_sms 10-05-2012 101 56   Download

  • Nu metal (nu-metal, còn gọi là aggro metal, hay nü metal theo truyền thống dùng dấu umlaut cho các tên heavy metal) là một thể loại âm nhạc khởi nguyên từ giữa thập niên 1990. Nó chịu ảnh hưởng chung từ grunge và alternative metal của đầu thập niên 1990 với hip hop, nhạc điện tử và một vài thể loại nhạc metal khác, nhiều nhất là thrash metal và groove metal . Dòng nhạc này phổ biến nhất vào cuối thập niên 1990, đầu những năm 2000....

    doc3p truongthinh 09-10-2009 288 48   Download

  • This volume aims at providing a coherent presentation of recent developments and understanding of heavy metal reactivity in soils. Such an understanding is necessary in addressing heavy metals concerns in the environment. The implicit framework of multiple reactivity acknowledges the widely known role played by the various colloidal surface functional groups in concomitant reactions. This overarching frame of reference allows unification between molecular structure-reactivity relationships at one scale and transport processes at the other....

    pdf0p crazy_sms 10-05-2012 46 18   Download

  • Heavy Metal Độ hòa tan và Giao thông vận tải trong đất bị ô nhiễm do khai thác mỏ và Smelting Khai thác mỏ kim loại, luyện kim, chế biến trên toàn thế giới đã bị ô nhiễm đất với các kim loại nặng trong vượt quá nồng độ nền đất tự nhiên. Các quá trình này giới thiệu các chất ô nhiễm kim loại vào môi trường thông qua phát thải khí và hạt, chất lỏng thải và chất thải rắn (Dudka và Adriano, năm 1997).

    pdf19p bengoan741 23-12-2011 43 11   Download

  • Toxic heavy metals, i.e. copper (II), lead (II) and cadmium (II), can be removed from water by metallurgical solid wastes, i.e. bauxite waste red muds and coal fly ashes acting as sorbents. These heavy-metal-loaded solid wastes may then be solidified by adding cement to a durable concrete mass assuring their safe disposal. Thus, toxic metals in water have been removed by sorption on to inexpensive solid waste materials as a preliminary operation of ultimate fixation. Metal uptake (sorption) and release (desorption) have been investigated by thermostatic batch experiments.

    pdf11p tudoia 06-04-2011 45 7   Download

  • Pot and field trials were carried out using sediment dredged from the port of Bremen (Germany) and deposited in a settling basin near Bremen; the sediment is polluted with Cd and Zn. Five iron-bearing materials were added to the soil (1% pure Fe in soil dry matter) to immobilize the heavy metals: ‘Red mud from the aluminium industry, sludge from drinking-water treatment, bog iron ore, unused steel shot and steel shot waste.

    pdf8p tudoia 06-04-2011 46 6   Download

  • Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: A survey of forest pollution with heavy metals in the Natural Forest Region (NFR) Moravskoslezské Beskydy with particular attention to Jablunkov Pass...

    pdf9p toshiba4 13-09-2011 31 3   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài:The role of interleukin-12 in the heavy metal-elicited immunomodulation: relevance of various evaluation methods

    pdf14p panasonic09 13-01-2012 33 3   Download

  • Tuyển tập các báo cáo nghiên cứu khoa học ngành y học tạp chí Medical Sciences dành cho các bạn sinh viên ngành y tham khảo đề tài: Trace Elements, Heavy Metals and Vitamin Levels in Patients with Coronary Artery Disease....

    pdf5p thulanh9 07-10-2011 16 2   Download

  • Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học quốc tế đề tài : Serum heavy metals and hemoglobin related compounds in Saudi Arabia firefighters

    pdf6p panasonic10 13-01-2012 16 2   Download

  • Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Synthesis and Electrochemical Sensing Toward Heavy Metals of Bunch-like Bismuth Nanostructures

    pdf5p dauphong17 21-02-2012 14 2   Download

  • Tuyển tập các báo cáo nghiên cứu về y học được đăng trên tạp chí y học General Psychiatry cung cấp cho các bạn kiến thức về ngành y đề tài: Heavy metal exposure reverses genetic resistance to Chlamydia-induced arthritis...

    pdf10p thulanh11 11-10-2011 17 1   Download

  • The mechanism of ATP hydrolysis of a shortened variant of the heavy metal-translocating P-type ATPase CopB ofSulfolobus solfataricus was studied. The catalytic fragment, named CopB-B, comprises the nucleotide binding and phosphorylation domains. We demonstrated stoichiometric high-affinity binding of one nucleotide to the protein (Kdiss 1–20lm). Mg is not necessary for nucleotide association but is essential for the phospha-tase activity.

    pdf15p viettel02 20-02-2013 13 1   Download

  • Monitoring the environment for metals has become a topic of considerable importance, not only to those industries emitting heavy metals but also to surveillance agencies and other organizations assessing the impact of metals on the environment. Our goal is to provide a comprehensive and easyto- read text for anyone working in the environmental analytical chemistry arena and to provide essential information to consultants and regulators about analytical and quality control procedures helpful in their evaluation and decision-making procedures.

    pdf360p 951628473 07-05-2012 75 45   Download


Đồng bộ tài khoản