heavy metal pollution in soil and plants at bone char site

Ngày tải lên: 05/09/2013, 08:40

Ngày tải lên: 23/03/2014, 00:20

... 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 ... also investigated partitioning of metals and solids in storm water. Their results indicated that Zn, Cd, Cu were mostly in dissolved form whereas Pb, Fe and Al were particulate-bound in storm water. In ... area 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 305 Figure...

Ngày tải lên: 16/03/2014, 00:25

... controlling heavy metal adsorption and their distribution between soil and water are soil type, metal speciation, metal concentration, soil pH, solid: solution mass ratio, and contact time [16–20].Ingen- eral, ... Mn and clay contents and pH [176]. Almost all of the Co in soils could be accounted for by that present in Mn minerals, indi- cating that these minerals can be an important sink for Co in soil ... of heavy metal ions on soils and soils constituents such as clay minerals, metal (hydr)oxides, and soil or- ganic matter. Empirical and mechanistic model approaches for heavy metal adsorption and...

Ngày tải lên: 15/03/2014, 23:09

... 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 ) ... culture plants in the laboratory or conducted field studies using plants growing in field-contaminated soil) . Sources of contamination for soils used in these studies included mine tailings (20%), ... determine the relationship 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...

Ngày tải lên: 15/03/2014, 23:10

Ngày tải lên: 16/03/2014, 00:07

Ngày tải lên: 18/02/2014, 04:20

... examination of the heavy metal, i.e. Cd and Zn on plant growth and uptake investigated by Zhang et al., also assist to elaborate a possible combination of phosphate application on heavy metal ... Therefore, plants usually have been used as indicators of metal pollution or accumulation in soil. Besides, plants are also used as accumulators for soil remediation, which is called phyto-remediation ... increasing 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...

Ngày tải lên: 14/03/2014, 15:20

... guidelines when it is determining VOC concentrations in soil and solid matrices. In order to help ensure that data generated are of known and appropriate quality and accurately reflect environmental ... testing and sampling industries and from State and Federal agencies, who provided input to this document and its predecessor. EPA Region 9 Technical Guidelines for Accurately Determining Volatile ... “Closed-System Purge- and- Trap and Extraction for Volatile Organics in Soil and Waste Samples,” and Method 5021, “Volatile Organic Compounds in Soils and Other Solid Matrices Using Equilibrium Headspace...

Ngày tải lên: 14/03/2014, 20:20

... to expand our summary presentation of information on the federal R&D funding going to higher education institutions that was presented in Discovery and Innovation: Federal Research and Development ... activities—particularly growing collaboration across fields, organizations, sectors, and even nations and suffer from inconsistent applications of definitions across reporting units. 6 Often, existing data on expenditures ... Carolina, South Dakota, Vermont, West Virginia, and Wyoming), the Commonwealth of Puerto Rico, and the U.S. Virgin Islands participated in NSF’s EPSCoR program. (Note that the U.S. Virgin Islands...

Ngày tải lên: 15/03/2014, 22:20

... concentrations in soil, the principal ones being: F in — input flux of (reactive) metal from external sources F weath — weathering input F age — removal by aging processes in mineral phases F ... the kinetics of metal sulfide precipitation and dissolution are formulated as kinetic processes. The concentrations and characteristics of the nec- essary water column and particulate partitioning ... poisoning issues. Further, comparison of hazard ranking using soil quality criteria/guidelines often does not correlate with hazard ranking in a single soil with a single test, so that ranking depends...

Ngày tải lên: 16/03/2014, 11:45

... bioremediation approach that included treating the remaining contaminated site with vermiculture – worms – that concentrate heavy metals in their bodies and reduce the contamination in the soil ... populations at polluted sites can be exposed through dermal contact with contaminated soil and water, ingestion of contaminated water, inhalation of dust and vapor and ingestion of contaminated ... earth. Mining is done through surface or open-pit mining, underground mining or through fluid mining. Open surface mining entails digging out or blasting rocks and creating open-pits in the earth,...

Ngày tải lên: 15/03/2014, 16:20

Ngày tải lên: 05/09/2013, 09:38

Ngày tải lên: 05/09/2013, 10:15

... Construction standard when no risks for 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 ... 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 methods ... Institute of Environmental Technology. Heavy metal rich sludge Dehydration (dry at room temperature and at 105 0 C-110 0 C) Fine screening (d ≤ 0,05 mm) Reuse Cooling Treating and Grinding ...

Ngày tải lên: 12/02/2014, 17:20

... with swimming in sewage-contaminated marine waters. 59 The amount of human illness after exposure to marine water appears to be increasing, and there is evidence that the rate of infection ... into our recreational and drinking water, into groundwater, and directly onto private property, often in the form of basement backups. Health experts in government, academia, and the private ... 9). 222, 223 That finding indicates that the sewage system in suburban Maryland is a large contributor to the pollution in the river, and it contradicts the presumption that stormwater pollution...

Ngày tải lên: 17/02/2014, 10:20

... 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 ... rapidly attain cumulative metals loading in the soil to simulate long-term applications. This phase allowed rapid attainment of a cumulative metals content in soil equivalent to 28 years at the ... with soil type and pH. In Hudson soils, dewatered sludge had the greatest percolate concentrations, reaching 0.24 mg/l in Cycle 4 for the low pH soil, and decreasing somewhat in Cycle 5. Pelletized...

Ngày tải lên: 16/03/2014, 00:07

Ngày tải lên: 24/03/2014, 05:20

Ngày tải lên: 29/05/2014, 17:23