dissociation constants of organic bases in aqueous
Tài liệu Risk Characterization, Assessment, and Management of Organic Pollutants in Beneficially Used Residual Products pdf
Ngày tải lên :
14/02/2014, 03:20
... challenge
occurring organic and inorganic compounds, but
of evaluating potential effects associated with an activity
also containing trace levels of synthetic organic com-
and determining whether ... assess-
The intent of introducing this approach is to encour-
ment model for trace organics in soil: III. Application of screening
model. J. Environ. Qual. 13:573–579.age all involved in sustainable ... significant
factor affecting the USEPA’s interpretation of the results.
Exposure point concentration distributions were de-
ORGANIC CHEMICALS AND
termined using source partition modeling of constituent
SIMPLIFIED...
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Tài liệu CONSUMER PREFERENCE AND CONSUMPTION OF ORGANIC PRODUCTS IN THE EASTERN CAPE PROVINCE OF SOUTH AFRICA docx
Ngày tải lên :
14/02/2014, 03:20
...
standardized discriminant functions to analyze the resulting data. There is evidence of
growing interest in organic products in the province, with a sizeable proportion of
respondents having consumed ... appeal
26
of organic products. It is also important that government finds ways of integrating organic foods
issues into the on-going agricultural restructuring process by providing the basic ... growing importance of organic products in the food system of the
Eastern Cape Province which warrants a systematic investigation into consumer preferences and
buying behaviour. Factors influencing...
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Uptake of organic chemicals in plants Human exposure assessment ppt
Ngày tải lên :
05/03/2014, 20:20
... the topic of uptake of organic contaminants from soil by plants. The goal was
to gain insight into both experimental data and predictive methods. Knowledge of uptake of con-
taminants in plants ...
the content of organic carbon in soil (in this case 2.5%) is similar to the lipid content of 228
roots (about 2 to 3%, including waxes and lignin), and the slope of the log K
OW
in the 229
regressions ... of the variance in 141
the measured concentration in plants is explained by the variance of the 142
concentrations in soil. 143
In case of an insignificant correlation, the concentration in...
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Remediation of Organic Chemicals in the Vadose Zone docx
Ngày tải lên :
14/03/2014, 19:20
... available. All of them are intended to increase the partitioning
of organic chemicals into vapor phases where they can be recovered by
SVE processes. In addition, one of the heating methods, conductive
heating, ... OF ORGANIC CHEMICALS IN THE VADOSE ZONE 981
∆T
The positions of the well screens and heaters are determined by the
distribution and type of contaminant. The spacing of the wells is deter-
mined ... J.
Rohay, was started in 1993 and continues to be an important source of
information describing remedial applications for barometric pumping.
HEATING TECHNOLOGIES
Four methods of heating the subsurface...
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Supply Chain of Organic Products in Bulgaria ppt
Ngày tải lên :
14/03/2014, 20:20
... period.
Organic farming processing in Bulgaria currently (2007) includes:
Drying of herbs, spices, seeds
Processing of organic products, including cultivated herbs and spices, packing of fruit, ... marketing of organic products and measures for creating of
efficient supply chain of organic products in Bulgaria.
Interesting conclusion can be drawn for the general food supply chain from ...
4.Improving the supply chain for organic products in Bulgaria
In the survey several questions were asked concerning opinions of the experts for improving the supply
chain for the organic products in...
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Chemical of alumina reactions in aqueous solution and its application in water treatment
Ngày tải lên :
15/03/2014, 23:22
... significance of alumina in the natural aquatic environment and its increasing application in drinking
and wastewater purification, the knowledge of the structure of alumina and its possible interactions ... the
pH of the solution that influences the properties of the
surface active sites and ozone decomposition reactions
in aqueous solutions. Knowledge of alumina interaction
with organicyinorganic ... hydroxide and inorganic ions into consideration.
The process of d-alumina dissolution in the presence of
8-hydroxyquinoline-5-sulfonate (HQS) and salicylate in
the pH range: 3–9 was examined. The...
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DETERMINATION OF ORGANIC COMPOUNDS IN DRINKING WATER BY LIQUID-SOLID EXTRACTION AND CAPILLARY COLUMN GAS CHROMATOGRAPHY/MASS SPECTROMETRY pdf
Ngày tải lên :
22/03/2014, 14:20
... and initial calibration at
the beginning of each 12-hour work shift during which analyses are performed
using the following procedure.
10.3.1 Inject a 1 àL aliquot of the 5 ng/àL solution of DFTPP, ... portion of the sample into the solvent reservoir.
The water sample will drain into the cartridge, and from the exit into the
suction flask. Maintain the packing material in the cartridge immersed in
water ... 10 minutes.
525.2-21
where: A = integrated abundance of the quantitation ion of the analyte
x
A = integrated abundance of the quantitation ion internal
is
standard
Q = quantity of analyte injected...
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A Generic QSAR for Assessing the Bioaccumulation Potential of Organic Chemicals in Aquatic Food Webs pot
Ngày tải lên :
22/03/2014, 14:20
... be used in the derivation of water
quality guidelines and total maximum daily loadings by
relating internal concentrations of organic chemicals in
upper trophic fish species to corresponding concentrations
in ... reduction in f
with increasing K
OW
. f represents the bioavailable fraction
of the chemical concentration in the water, which decreases
with increasing K
OW
because of the increase in the chem-
icalìs ... of the combined process of the feeding rate, which is
based on the bioenergetics of organism weight W (kg) and
temperature T (8C), and of the diffusion rate of the chemical
across the intestinal...
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ANAEROBIC BIODEGRADATION RATES OF ORGANIC CHEMICALS IN GROUNDWATER: A SUMMARY OF FIELD AND LABORATORY STUDIES pdf
Ngày tải lên :
28/03/2014, 19:20
... the Agency.
ACKNOWLEDGMENTS
A number of individuals have been involved with the project. Dr. Zubair A. Saleem of the U.S.
EPA, Office of Solid Waste, Washington, D.C., provided overall technical ... Temperature of Groundwater in the United States at Depths of 10-20 meters (Collins, 1925)
D-13
Table D.10
Summary Table for Anaerobic Biodegradation Rate Constants for Dichloromethane According to ...
OF ORGANIC CHEMICALS
IN GROUNDWATER:
A SUMMARY OF
FIELD AND LABORATORY STUDIES
Work Assignment Manager Dr. Zubair A. Saleem
and Technical Direction: U.S. Environmental Protection Agency
Office...
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AEROBIC BIODEGRADATION OF ORGANIC CHEMICALS IN ENVIRONMENTAL MEDIA: A SUMMARY OF FIELD AND LABORATORY STUDIES pot
Ngày tải lên :
28/03/2014, 19:20
... to
determine the rate of biodegradation of specific contaminants in groundwater during a field
study. Mass flux of the studied contaminant through a line/cluster of wells (a transect) is
recorded instead ... reached as a final timepoint, an earlier time was chosen for the kinetics calculation, if
possible; the use of zero as a denominator in the first-order rate equation would result in an
“infinite” value. ... leveled off at that point
for the remainder of the experiment, the final concentration and time were chosen at the point
where the concentration leveled off. In column studies, the time field in the...
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báo cáo hóa học: " A case study on co-exposure to a mixture of organic solvents in a Tunisian adhesive-producing company" potx
Ngày tải lên :
20/06/2014, 00:20
...
Workshop of the
Vinyl Adhesive
Surface: 113,75 m
2
Number of workers: 5
Number of stations: 3
- Primary Production of the vinyl adhesive
- Manufacture of the vinyl adhesive
- Conditioning of the vinyl ... were working in the manu-
facturing and conditioning lines, in the control labora-
tory and in the storage halls of the finished products (10
men, 15 women, median age 44.8 years [min = 25, max
= ... biomarkers of hexane and
toluene, were high in the workshop of dissolved adhe-
sive. Also high concentration of the 2,5-hexanedione
was observed in certain employees’ urines working in
the vinyl adhesive...
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