heavy metal pollution in soil pdf
ENVIRONMENTAL IMPACT OF HEAVY METAL POLLUTION IN NATURAL AQUATIC SYSTEMS ppt
Ngày tải lên :
23/03/2014, 00:20
... CONTENTS
ACKNOWLEDGEMENT
ABSTRACT
Chapter
1
INTRODUCTION
01
2
SOURCES OF HEAVY METALS IN AQUATIC ENVIRONMENT
Introduction
06
Assessment of Heavy Metals Mobility
13
3
ROLE OF HYDROUS METAL OXIDES IN THE TRANSPORT
OF HEAVY METALS ... metals between soil and soil solutions is a key
issue in evaluating the environmental impact of long term applications of heavy
metals to land. Contamination of soils by heavy metals has been ... differences in
metal content encountered in different species, since the structure and function
of the organs in contact with the contaminated medium can be instrumental in
governing the metal contents....
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Heavy metal contamination in soils of urban highways (comparision between runoff and soil concentration
Ngày tải lên :
16/03/2014, 00:25
... Printed in the Netherlands.
HEAVY METAL CONTAMINATION IN SOILS OF URBAN HIGHWAYS 313
5. Conclusions
Heavy metal contamination in soils taken from along I-75, Cincinnati, Ohio, is very
high in ... of swelling clay in
the soil, in this particular case, clay mineralogy is not important in the binding of
the heavy metals, whereas the positive correlation of metals with organic carbon
indicates ... run-off carrying the metals into surface drainages, bypassing the soil. This study also shows
that for those countries still using leaded gasoline, important reductions in Pb contamination of soils
can...
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A meta analysis and risk assessment of heavy metal uptake in common garden vegestable
Ngày tải lên :
15/03/2014, 23:10
... between heavy metal concentrations in the
soil and heavy metal concentrations in vegetables and 2) determine the level of risk associated
with exposure to heavy metals through ingestion of contaminated ...
studies using plants growing in field-contaminated soil) . Sources of contamination for soils used
in these studies included mine tailings (20%), sludge amendments (20%), industrial wastes
(20%), ... electroplating, smelting, and ore
processing (ATSDR 1994). Mine tailings and drainage from mines can contain high
concentrations of zinc (Cobb et al. 2000).
The fate and transport of zinc (Zn
+2
) in...
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Báo cáo khoa học: Heavy metal ions inhibit molybdoenzyme activity by binding to the dithiolene moiety of molybdopterin in Escherichia coli pdf
Ngày tải lên :
23/03/2014, 06:20
... be caused by bind-
ing to zinc binding proteins, e.g. proteins that contain
zinc finger protein structures [30]. Zinc and cadmium
are in the same group in the Periodic Table, contain
the same common ... are
inserted into Moco found in hSO. In addition to the
metals investigated in this report, other metals ions
known to bind tightly to sulfur-rich sites, such as zinc
and cobalt, are inserted into ... mixture did not result in their
insertion into MPT (data not shown). In addition, we
tested the insertion of metal ions into MPT-containing
hSO. None of the metals was inserted into hSO
(Fig. 3B),...
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Tài liệu Báo cáo " Study on reuse of heavy metal rich sludge in ceramic pigment and construction material production " docx
Ngày tải lên :
12/02/2014, 17:20
... environment (heavy metal leaching
into rain water) were found.
In further study, heavy metal leaching into
rain water with lower pH value and longer
soaking time should be investigated; ... Environmental
safety testing based on heavy metals concentration in rain water soaking tested products (pH value
of 5.6-5.9) during 2 to 21 days shows the satisfactory in comparison to the permitted ... sufficiently high
concentration of heavy metal [1-3].
Currently, heavy metal rich sludge is
mainly treated by solidification then
disposed/land filled and incineration. In
addition, some treatment...
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THE MINE WATER POLLUTION THREAT TO WATER RESOURCES AND ITS REMEDIATION IN PRACTICE pdf
Ngày tải lên :
15/03/2014, 16:20
... 1
THE MINE WATER POLLUTION THREAT TO WATER RESOURCES AND ITS
REMEDIATION IN PRACTICE
PAUL L. YOUNGER
Pollution by mine drainage is a major problem in many parts of the world. ... world. The most frequent
contaminants are Fe, Mn, Al and SO
4
, with locally important contributions by other metals /
metalloids including (in order of decreasing frequency) Zn, Cu, As, Ni, ... even more challenging than the technical difficulties involved in
implementing remedial interventions which will be robust in the long term. Hence truly 'holistic'
mine water remediation...
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Health effects due to motor vehicle air pollution in New Zealand pdf
Ngày tải lên :
15/03/2014, 16:20
... seasonal
differences in almost all monitoring records. This is due to two main factors (a) differences in
emissions - for instance home heating only occurs in winter, and to a greater extent in the
South ... Wellington, Christchurch and Dunedin -
these have been refined by splitting the area into two or three natural airsheds. For Auckland
the 'city' airshed have been determined using output ... leading air quality
and public health specialists in New Zealand. The work has involved:-
ã Examining the overseas methodologies and results,
ã Collating whatever relevant data are available in...
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A review of heavy metal removal mechanisms in wetlands
Ngày tải lên :
15/03/2014, 23:06
... brought heavy metals from cobalt tailings
stockpiled as result of copper mining upstream at
Kilembe mines prevented heavy metals from reaching
the lake. This in turn prevented heavy metals ... aggregate heavy metals into particles large
enough to sink. In this way heavy metals are removed
from wastewater and trapped in the wetland sediments,
thus protecting the ultimate receiving aquatic ... by tailings from metalliferous
mining, particles of ore minerals in the soils, such as,
PbS, ZnS and CuFeS
2
become oxidised, releasing metal
cations Pb
2+
, Cu
2+
, Zn
2+
and Cd
2+
into...
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Adsorption of heavy metal inons on soils and soil constituents
Ngày tải lên :
15/03/2014, 23:09
... understanding of how heavy metals are transferred from
a liquid mobile phase to the surface of a solid phase.
The most important interfaces involved in heavy metal
adsorption in soils are predominantly ... of soil type
The soil type and composition plays an important role
for heavy metal retention. In general, coarse-grained soils
exhibit lower tendency for heavy metal adsorption than fine-
grained ... capacity of the
soil increases approximately three times per unit increase in
pH. In addition to adsorption, precipitation can play an im-
portant role in controlling Cd levels in soils. In general,...
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Effect of sludge processing mode, soil texture and soil ph on metal mobility in undisturbed soil columns
Ngày tải lên :
16/03/2014, 00:07
... processing (digested dewatered, pelletized, alkaline-stabilized, composted, and incinerated), soil type and
initial soil pH on trace metal mobility was examined using undisturbed soil columns. Soils ... from in situ passive wick
lysimeters installed in the original đeld plots; and (2)
observe the eects of altering soil pH on residual metals
present in the soil.
In all cases, undisturbed soil ... sludge loading.
Sludge-processing mode, soil type, soil texture and
time since application had substantial eects on perco-
late metal mobilities following heavy sludge loadings.
Metals and nutrients...
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Lund University International Master’s Programme in Environmental Science (LUMES): Assessment of Efforts to Solve the Water Pollution Problem in Kaunas pdf
Ngày tải lên :
23/03/2014, 00:20
... production. In 1997 BOD
7
was higher than
in 1996 indicating higher pollution with organic material. Increase in pollution of the
wastewater happens because of higher production of industrial ... wastewater increases by 46% in the
future due to higher industrial production and it reaches the level of 1995 in 2005, then BOD
in the river will increase to 3.68mg/l (the increase in BOD in the ... bacteriological parameters are determined in the norms regarding water for drinking,
bathing, recreation and medical treatment. Sampling operations and inspections of the water
are carried...
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Severe ozone air pollution in the Persian Gulf region pdf
Ngày tải lên :
23/03/2014, 02:20
... case in the Gulf region.
Surprisingly, during summer the daily mean ozone mixing
ratios in Bahrain are similar to Los Angeles although daytime
peak levels can be higher in the latter. In winter ... mixing ratios of about
20 ppbv or less. Only in Bahrain during summer ozone lev-
els approach 40 ppbv, indicating substantial in uence from
upwind natural NO
x
emissions, especially lightning ... radiative forcing of climate.
In fact, STE derived ozone penetrates remarkably far south
over the Middle East. Especially in winter and spring an O
3
s
maximum reaches deeply into the tropics in the...
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