Arsenic fractionation in soils using an improved sequential extraction procedure
Arsenic fractionation in soils using an improved sequential extraction procedure
... Ure, Anal. Chim. Acta 382(1999) 317.[48] G.J. Kirk, Eur. J. Soil Sci. 50 (1999) 369.Analytica Chimica Acta 436 (2001) 309–323 Arsenic fractionation in soils using an improved sequential extraction ... commonly used SEPs in fractionat-ing As and Se using standard minerals and mixturesthereof [17]. They showed that during reductive andoxidative dissolution of As from a certain mineralphase, re-adsorption ... and bioavailability in the soil. We developed and tested a sequential extraction procedure (SEP) for As by choosing extraction reagents commonly used for sequential extraction of metals, Se and...
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arsenic contamination in soils, water and plants
... 1 Arsenic contamination in soils, water and plants surrounding gold mine in Thailand Thares Srisatit1, Wanpen Wirojanagud2, Thanes Weerasiri3 1 Faculty of Environmental Engineering, ... 0.3 mg/kg in plants and 0.001-0.01 mg/l in surface water. Contamination in soils and plants were found higher much larger than those in surface water flown from the tailing of gold mining disposal ... land use. INTRODUCTION Exposure to arsenic can result in a variety of health problems in humans, including various forms of cancer (e.g. skin, lung, and bladder), cardiovascular and peripheral...
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Effects of compost and phosphate amendments on arsenic mobility in soils and arsenic uptake by the hyper
... treatment.2.5. Sequential extraction of As in soils Soil samples were extracted using the sequential extraction procedure of arsenic (Onken and Adriano,1997). The procedure separated As into five operationallydefined ... contamination from the leaching lossesof wood preservatives. As arsenic accumulates in soils, there may be an increase in health risks resulting fromAs leaching into ground and surface water and ... forms.3.4. Arsenic uptake and accumulation in the fern plantsTu and Ma (2002) reported that Chinese brake fernsare highly tolerant of arsenic and can survive in a soilcontaining up to 500...
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AN IMPROVED INTERPOLATION METHOD FOR CHANNEL ESTIMATION IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYSTEM USING PILOT SIGNALS
... modulated OFDM signal in the time domain, and inserts CP (Cyclic Prefix) in the forefront of the sequence which can eliminate ISI (Inter Symbol Interference) and ICI (Inter Carrier Interference) signals ... fourth rankings. On the other hand, the second-order interpolation is coming in the fifth ranking and the worst technique goes to the linear interpolation for the estimation of the channel. ... channel over all the Doppler frequencies compared to other types of interpolation. Meanwhile, the lowpass, Spline and time domain interpolation are coming in the second, third and fourth rankings....
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PREDICTION OF ATRAZINE FATE IN RIPARIAN BUFFER STRIPS SOILS USING THE ROOT ZONE WATER QUALITY MODEL
... load into the RBS and the runoff depth from the cornfield increased the atrazine mass loss in runoff leaving the RBS increased (Table 4). Atrazine mass in runoff leaving the RBS were in the range ... friendly than the DOS version and allows easy manipulation of input data in each window session. RESULTS AND DISCUSSIONS Simulation of atrazine fate, leaching and runoff loss As atrazine ... quality in Walnut Creek watershed: Herbicides in soils, subsurface drainage, and groundwater., J. Environ. Qual. Vol.28:35-45. Reungsang, A. (2000) Transport and Fate of Atrazine in Riparian Buffer...
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Tài liệu Engineering Mechanics - StaticsChapter 1Problem 1-1 Represent each of the following combinations of units in the correct SI form using an appropriate prefix: (a) m/ms (b) μkm (c) ks/mg (d) km⋅ μN Units Used: μN = 10−6N kmμkm = 109−6Gs = 10 s pptx
... by any means, without permission in writing from the publisher.Engineering Mechanics - Statics Chapter 2Solution:Write the vectors and unit vectorsr1vr1sinε()cosφ()sinε()− sinφ()cosε()⎛⎜⎜⎜⎝⎞⎟⎟⎟⎠= ... reproduced, in any form or by any means, without permission in writing from the publisher.Engineering Mechanics - Statics Chapter 2cosε()2cosγ()2+ cosφ()2+ 1=φFindφ()=φ135deg=Find ... reproduced, in any form or by any means, without permission in writing from the publisher.Engineering Mechanics - Statics Chapter 2Given:F 600 N= c 4m=a 4m= d 3m=b 6m= e 4m=Solution:Find the...
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Arsenic immobilization by calcium arsenic precipitates in lime treated soils
... arsen-´ic-containing waste: leach tests and behavior of arsenic in the leachate. Waste Manage 1995;15:55–62. Dutre V, Vandecasteele C. Immobilization mechanism of arsen-´ic in waste solidified using ... sorption andyor inclusion in pozzolanic reaction products andyor the formation of calcium arsenic (Ca–As) precipitates. In this study, suspensionsof lime–As and lime–As–kaolinite were studied in an ... suchas herbicides and insecticides (Leist et al., 2000)and has thus created problems through leachingand infiltration to subsurface soils and groundwater (Murphy and Aucott, 1998). Arsenic is alsoproduced...
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Arsenic speciation in contaminated soils
... 2 min, decreasing to 50% A in 0.1 minand maintained for 3 min, then increasing to100% A in 0.1 min and maintained for 7 min. Theeluate reached the hydride generator system andafter passing ... agricultural soils in someregions, as a consequence of the use of arsenic- containing pesticides and herbicides [1–3]. Othercontributing sources of arsenic in the soils areindustrial and mine wastes. ... soils. Thisgives on the one hand an idea of the contamina-tion level, and, on the other hand, on the feasibil-ity of our two couplings to detect both inorganicand organic species in the soils...
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