Biogeochemistry of trace metals
Immobilization of heavy metals in sediment dredged from a seaport by iron bearing materials
... easily by using one of the latest technologies – Biofast – a kind of machine for filtering liquid wastes. Biofast are outstanding because of its effectiveness and efficiency. Biofast operates automatically; ... Medical Institute of Labor and Environment Sanitation, the level of pollution of liquid wastes in hospitals was 20,000 times more than standard. According to the report...
Ngày tải lên: 23/09/2012, 15:38
Embodiment of Trace Theory in Teaching Verb Tenses
... students use appropriate forms of verb tenses Trace Theory-2 Trace theory of memory (Katona, 1940) The more often or the more intensively a memory connection is traced, the stronger the memory ... help for learners to grasp the concept of grammar points like verb tenses. Embodiment of Trace Theory in Teaching Verb Tenses Hankuk University of Foreign Studies 韓國...
Ngày tải lên: 05/09/2013, 21:10
DETERMINATION OF TRACE ELEMENTS BOUND TO SOIL AND SEDIMENT FRACTIONS
... been developed during the past 20 years for the determination of binding forms of trace metals in sediment. The lack of uniformity of these schemes, however, did not allow the results so far to ... a mobilization of some trace metals. The chemical forms of many elements in the sediments of St. Gilla Lagoon (Sardinia, Italy) were evaluated [116]. Five fractions, consistin...
Ngày tải lên: 15/03/2014, 23:56
Distribution and mobility of heavy metals
... metals; Contaminants; Soils; Mobility; Speciation 1. Aim of investigation The problem of contaminated soils is becoming of increasing concern for the environment because of the large number of ... obtained can be of use for the local authorities to decide about the necessity of reclamation of the two sites and the level of priority of the interven- tion, with respect to t...
Ngày tải lên: 15/03/2014, 23:56
Effect of metal spiking on different chemical pools and chemically extractable fractions of heavy metals
... F 4 or reducible fraction of Ni, Cu, and Cd and residual fraction of Zn and Pb, but decreased F 2 fraction of Zn, F 3 of Zn and Ni, F 4 fraction of Zn and F 5 fraction of Ni, Cu, and Cd. Metal ... soil, or to distinguish the effects of the spiked metals from that of other metals and various other contaminants present in the sludge. Since, bioavailability of metals adde...
Ngày tải lên: 16/03/2014, 00:07
Báo cáo y học: "Trace Elements, Heavy Metals and Vitamin Levels in Patients with Coronary Artery Diseas"
... in reducing the risk of CAD (6). Studies on the roles of trace elements in health and disease over the past 50 years have led to a good understanding of their mode of action and why they ... effects of excess oral exposure of humans to Mn. The urine of CAD patients also shows higher Mn concentrations than that of healthy controls (24). In atherosclerotic sub- jects,...
Ngày tải lên: 25/10/2012, 10:51
Removal of Nutrients, Organic Matter and Heavy Metals from Paddy Field Drainage by Charcoal
... a contact time of more than one hour. The reduction rates of TOC and TN ranged from 20 % to 40 %. The reduction rate of TP ranged from 20 % to 90 %. The reduction rates of metals (Cr, Fe, ... showed that the behavior of TP differs from that of TOC and TN in the equipment. The CVs in heavy metals were larger than those of TOC, TN and TP. Especially, the CV of Fe cha...
Ngày tải lên: 05/09/2013, 09:38
Đề tài " A stable trace formula III. Proof of the main theorems" pptx
... Section 10 of [I]. We refer the reader to the introduction of [I] for a general discussion of the problem of stabilization. The introduction of [II] contains further discus- sion of the trace formula, ... established a key reduction in the proof of one of the global theorems. In this paper, we shall complete the proof of the theorems. We shall combine the global reduction...
Ngày tải lên: 05/03/2014, 23:20
Analysis of the atmospheric distribution, sources, and sinks of oxygenated volatile organic chemicals based on measurements over the Pacific during TRACE-P pdf
... differences. Mixing ratios of OVOC were strongly correlated with each other as well as with tracers of fossil and biomass/biofuel combustion. Analysis of the relative enhancement of selected OVOC with ... Sources [ 25] Because of the complexity of sources and lack of observational data, our quantitative knowledge of OVOC Table 2. Mean Enhancement Ratios and Total Biomass Burni...
Ngày tải lên: 14/03/2014, 20:20