corrosion of steel in soil

Ngày tải lên: 15/03/2014, 23:22

... was observed for surface soils having higher soil organic matter compared with subsurface soils, indicating that SMT mainly binds to soil organic matter in soils Addition of dissolved organic carbon ... using polyvinyl chloride (PVC) plastic pipe Soil cores were obtained by forcing the pipes into the soil with a geotechnical drill rig and carefully excavating the surrounding soil Distinct soil ... and soil aggregation in the first year Roots increase soil aggregation by exuding binding agents 32 and serving as a food source for microorganisms, thus increasing infiltration and decreasing...

Ngày tải lên: 13/11/2014, 09:16

... lysogenic interactions in soil using cultivable soil bacterial isolates, while in Chapter 5, induction assays are developed to determine the frequency of inducible lysogeny within natural soil bacterial ... virulent soil phages which can remain infective, residing within the soil matrix for extended periods of time In fact, it has been shown that autochthonous virulent soil phages can retain their infectivity ... importance of lytic infections within the context of soil viral ecology Progress in soil viral ecology Andrews described the field of microbial ecology as a set of experiments in search of a theoretical...

Ngày tải lên: 13/11/2014, 10:53

... or model uncertainty) In the case of rainfall-induced landslides, the input parameters include soil properties and rainfall infiltration The primary sources of uncertainty in soil properties ... Illustration of change in soil matric suction (a) initial condition (b) during dry periods (c) during rainy days (after Phoon et al 2009) 2.1 Sources of uncertainty in analysis of rainfall-induced ... presence of fairly significant uncertainties For instance, uncertainties in the soil properties have been well recognized The sources of uncertainty include the inherent variability in the soil, ...

Ngày tải lên: 10/09/2015, 15:50

... 0.00015 in Clay Mud >10 < µm < 0.000039 in Colloid Mud 2.2.4 Soil Contamination Definition Soil contamination is the presence of hazardous chemicals mixed with soil or other changes in the natural soil ... amounts of initial material Other applications of PCR include DNA sequencing to determine unknown PCR-amplified sequences in which one of the amplification primers may be used in Sanger sequencing, ... drenches on soil can only penetrate into the weeds through the stem or roots of the grass These herbicides have been used spray on kind of ground just finish plowing or finished sowing, when the...

Ngày tải lên: 28/04/2016, 13:40

... Water-Soluble Chloride in Mortar and Concrete 3—Apparatus 3.1—Sampling equipment: The apparatus required for obtaining samples by coring or sawing is described in ASTM C 42.§ Sampling by drilling is not ... determination are given in the test method for chloride of ASTM C 114 5— Sampling 5.1—Reduce the size of a minimum 300 gm sample as specified in Section 6, and divide this sample to a minimum ... Proceed in accordance with the reference ASTM C 114, starting with the procedure specified in Section 19.5.3 and continuing to the end of Section 19.5.8 7.2.3 Make a blank determination by using...

Ngày tải lên: 24/10/2014, 17:40

... concentration The comparison of inhibiting-efficiency data obtained from the electrochemical methods used in the determination of the corrosion of mild steel in HCl is presented in Fig.5 Inhibition efficiencies ... capacity of the mild steel surface in the presence of the inhibitor and this could be related with the decrease in the corrosive area on the mild steel surface owing to the increase of the inhibitor ... concentrations of Na-CMC on the mild steel corrosion in 1.0 mol·L−1 HCl was studied by weight loss at 298 K after 24 h of immersion period The corrosion rate (W) of mild steel was determined by using the...

Ngày tải lên: 02/09/2015, 13:14

Ngày tải lên: 15/11/2015, 15:05

... The input soil properties of the dam and subsoil are described in Table Table Material properties of embankment modelling Sandy Clay (Dam) Soft Clay Fine Sand [kN/m³] Undrained 18.00 Undrained ... behaviour and stability of the structures The main purposes of FE-analyses are the determination of stresses including pore pressures, of stress/strain distribution, and the prediction of deformation ... above, initial soil conditions play an essential role in most soil deformation problems Initial horizontal soil stresses have to be generated by selecting proper -values MATERIAL MODELLING OF AN...

Ngày tải lên: 01/04/2013, 22:44

... contamination of Drinking water in Bangladesh WHO assignment report December 6-20, 1996 Jones, B and Manning, D A C (1994) Comparison of geochemical indices used for the interpretation of palaeoredox ... Preliminary Results of Groundwater investigation in Arsenic affected areas in Bangladesh A Report Prepared by RGAG Japan RGAG(1999) Arsenic contamination of ground water in Bangladesh Interim ... Atrai, Meghna flood plains and the tidal regions of the country (Fig-1) The datas and records of geological investigations of the areas adjoining to the western border in West Bengal show’s that...

Ngày tải lên: 05/09/2013, 08:40

... concentration of Cu in soil The accumulation of heavy metal in plant tissues of Brassica juncea L is reflected the concentration in soil The contents of Cu in plant increase upon the rates of Cu application, ... content of Cu in plants of Brassica juncea is reduced by 14% compared to the control sample In general, there is a reduction in growth rate of Brassica juncea when the content of Cu in soil increases ... concentration in soil and Cu content in plant shows a significant positive effect (Fig 1) Table The contents of Cu2+ in soil, Cu content in plant and plant height (fresh weight) Cu2+ in soil Plant...

Ngày tải lên: 14/03/2014, 15:20

... binding proteins in a tolerant strain of Pseudomonas putida, grown in a defined medium containing mM Cd2q Mechanisms of complexing Cd have evolved over time to allow the cell to survive high intracellular ... toxicity of Cd to several fungi in soil with an increasing content of montmorillonite Presence of different mineral nutrients, cations or anions in the soil can also alter the toxicity of Cd by ... 4–27% of the total microbial biomass in the soil (McCann and Cullimore, 1979) and are involved in maintaining soil fertility and oxygen production (Bold and Wynne, 1978) Mineralization of algae...

Ngày tải lên: 15/03/2014, 23:21

... use of reduced tillage systems, including ZT, and phosphate fertilization are increasing dramatically The widespread use of this technology along the time will affect the soil properties of the ... hypothesize that concentrations of trace elements will increase and stratify in those soils However, as a consequence of the recent introduction of zero tillage and the lack of fertilization history, ... located in Pergamino Ž33Њ56Ј S; 60Њ34Ј W The soil is a Pergamino Series, fine illitic thermic Typic Argiudoll ŽTable In 1979 three soil treatments started: Ži a pasture of Festuca arundinacea,...

Ngày tải lên: 15/03/2014, 23:22

... thus indicating some physical protection in less-accessible pores Since 71 –82% of DOM was obtained in the batch extracts, DOM conservation in the smallest pores may be of major importance in soils ... al (1994) determined the effects of N additions on the mineralisation of DOM obtained from water extracts of soil samples taken at different depths of a pasture profile In the subsoil (80 – 224 ... as an indicator of metal toxicity in soils Soil Biol Biochem 33, 235 – 240 Metting, F.B., 1993 Structure and physiological ecology of soil microbial communities In: Metting, F.B (Ed.), Soil Microbia...

Ngày tải lên: 15/03/2014, 23:22

... concentrations of Cd and As in soils were increased, the contents of Cd and As in agricultural products were significantly increased, basically The contents of Cd in the edible parts of chinese cabbage, ... the contents of Cd in edible part of chinese cabbage, radish and lettuce grown at the 0, 5, 10, 25, 50, and 100 mg kg-1 of Cd treated soils The contents of Cd in edible part of chinese cabbage, ... edible part of chinese cabbage, radish, and lettuce grown at the Cd treated soils Contents of As and Cd in edible part of chinese cabbage, radish, and lettuce The contents of As and Cd in agricultural...

Ngày tải lên: 16/03/2014, 00:07

... amendments increased As leaching from CCA soil in the absence of the fern, but decreased in the presence of the fern For the ASC soil, both treatments reduced As leaching regardless of the presence of ... spiking of As into the soil, in which As was predominantly associated with the labile exchangeable and aluminum oxide fractions ($ 80% of total As) On the other hand, in the CCA, soil As was mainly ... significant change in pH of the CCA soil was probably due to the similar pH of the soil and each of the amendments The application of the neutral pH amendments increased pH of the acidic ASC soil at first...

Ngày tải lên: 16/03/2014, 00:07

... of 15 × 20 m on I-75 in Cincinnati, during five rainfall events in 1995 Their results showed that the event mean concentrations (EMC) HEAVY METAL CONTAMINATION IN SOILS OF URBAN HIGHWAYS 297 of ... amount of Pb in a 15 × 20 × 0.3 m volume of the soil was calculated as 74 kg The amount of Pb contamination in runoff, which is 68 µg L−1 , was obtained by taking the average of the five runoff events ... highway has been in use This value includes only the amount of contamination coming from abrasion of brakes, tires of vehicles, etc In calculation 311 HEAVY METAL CONTAMINATION IN SOILS OF URBAN HIGHWAYS...

Ngày tải lên: 16/03/2014, 00:25

... typically greater in acidic soils than alkaline soils, neutralizing agents in the form of lime are commonly added to acidic soils Although the primary incentive in liming acidic arable soils is the ... difference being more pronounced in the Egmont soil (Figure 1A) An increase in soil pH has often been shown to enhance the solublilization of organic matter, resulting in an increase in the concentration ... concentration of dissolved organic carbon (DOC) (Temminghoff, 1998) In the present study the concentration of DOC increased with increasing pH, and the pH-induced increase in DOC was higher in the KOH-treated...

Ngày tải lên: 16/03/2014, 00:25

... history of many mining sites, this can be difficult Dioxin from Pulp and Paper and Lead in Soil at Mining Sites 43 town According to Murray (1995), current or historical mining areas of the intermountain ... over-estimation of the cancer risks of dioxin, went on to become the leading voice of a revisionist camp of environmental journalism 33 Dioxin from Pulp and Paper and Lead in Soil at Mining Sites 24 of four ... 912-913) Dioxin from Pulp and Paper and Lead in Soil at Mining Sites 42 the mineral sector Responding to concerns of the mining industry, however, Congress passed the “Bevill Amendment” in 1980 (RCRA...

Ngày tải lên: 24/03/2014, 05:20

... Precipitate size 6.2.2 Influence of quenching conditions 6.2.3 Influence of final annealing 6.2.4 Influence of cold work and deformation sequence 6.2.5 Initiation of nodular corrosion in BWR materials ... prepayment of Austrian Schillings 100, in the form of a cheque or in the form of IAEA microfiche service coupons which may be ordered separately from the INIS Clearinghouse The originating Section of ... amount of Fe impurity present is usually not found in the a-phase, most of it being in the remaining P-phases, in metastable solid solution Other minor constituents are often found in the form of...

Ngày tải lên: 18/05/2014, 19:38