sa and heavy metal stress

... metals and its application to decontamination and recovery of metals in water Due to the dwindling resources of valuable metals, it is becoming more economical to recover rather than remove heavy ... remove heavy metals from wastewater, so as to allow reusability of these metals As shown in Equations (2-22) and (2-23), in addition to oxygen, metal ions can also consume electrons and complete ... of the aggregate formation, the band-gap energies of the conductance and valence bands and the adsorption properties of organic compounds (Ku et al., 1996; Fox and Dulay, 1993) Ray et al (2000)...

Ngày tải lên: 28/11/2015, 13:45

... Freeman H M (1989) Standard Handbook o f Hazardous Waste Treatment and Disposal, p 7.24McGraw-Hill, New York Freeman H M (1988) Standard Handbook of Hazardous Waste Treatment and Disposal, p 6.5McGraw-Hill, ... sorbents, preferably metallurgical waste solids, for heavy metal removal from contaminated water The heavy metal (Pb, Cd and Cu) removal capacity as well as sorption modelling of red muds and fly ashes ... doublefold aim o f heavy metal fixation and metallurgical solid waste disposal would then be achieved with the constraint that fly ashes better serve the purpose o f heavy metal fixation than...

Ngày tải lên: 23/09/2012, 14:47

... Water and Environment Technology, Vol.5, No.1, 2007 RESULTS AND DISCUSSION Absorption behavior of PTW Fig shows the relationship between the quantity of PTW and the adsorption efficiency of Pb2+ and ... 16 - Journal of Water and Environment Technology, Vol.5, No.1, 2007 Table below gives the ion diameters of some heavy metal ions It can be seen from the table that the metal ions are much smaller ... PTW crystal [5] So that the metal ions could rather easily penetrate into the crystal layer and substitute K+ ions to form stable metallic/potassium tetratitanates The metal ions would then be removed...

Ngày tải lên: 05/09/2013, 09:38

... models for appropriate modeling and prediction of heavy metal toxicity and accumulation Funaria hygrometrica Hedw is one of the most tolerant mosses to heavy metals (Itouga et al., 2006) Therefore, ... More detailed modeling of the BLM about heavy metal detoxification and conformation change of BL leads to more appropriate prediction of heavy metal toxicity and accumulation in organisms CONCLUSIONS ... accumulation in the moss, n (mg/g d.w.) is the maximum heavy metal accumulation, [M] (mol/L) is the total concentration of heavy metal, and Km (mol/L) is Michaelis constant The observed data...

Ngày tải lên: 05/09/2013, 10:15

... 2.1 Heavy metal rich sludge: The heavy metal rich sludge discharged from the electroplating waste water treatment system in \ Heavy metal rich sludge Dehydration (dry at room temperature and ... result of heavy metal rich sludge composition Analysis result of chemical compositions of heavy metal sludge showed that the sludge taken from Goshi -Thanh Long company contains some heavy metals ... material, Hanoi University of Construction The environmental safety of sludge re-usage was assessed based on heavy metals leaching after 2, 14 and 21 days of soaking in rain water The experiments were...

Ngày tải lên: 12/02/2014, 17:20

... (e.g., iron and aluminium oxides) and adsorption increases with pH The adsorbed metal ions show only poor desorbability, and metal adsorption is independent from inert electrolytes Heavy metals are ... (such as Fe- and Al-oxides and oxyhydroxides), which may lead to charge reversal [100] Humic-coated mineral surfaces strongly adsorb heavy metal ions, which will lead to diminished heavy metal mobility ... between planes and β and between β and d are plane condensers with capacitance G1 and G2 , respectively, the relation between charge and potential is given by: σ0 Ψ0 − Ψβ = (15) G1 and σ0 + σd σd...

Ngày tải lên: 15/03/2014, 23:09

... 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 through ingestion ... Trace metal deficiencies in plants have been associated with increases in heavy metal uptake (Khan and Frankland 1983) Soil pH significantly influences heavy metal concentrations in both soil and ... Pb, and Zn) by vegetables (cabbage, carrot, lettuce, and radish) The objectives of this research were to 1) determine the relationship between heavy metal concentrations in the soil and heavy metal...

Ngày tải lên: 15/03/2014, 23:10

... EDTA and DTPA on heavy metal toxicity using Microtox bioassay Chemosphere 32, 1485–1497 Smith S E and Read D J 1997 Mycorrhizal Symbiosis Academic Press, San Diego, London, 605 p Sommers L E and ... Huang J W and Cunningham S D 1996 Lead phytoextraction: species variation in lead uptake and translocation New Phytol 134, 75–84 Leyval C, Turnau K and Haselwandter K 1997 Effects of heavy metal ... E and Lindsay W L 1979 Effect of pH and redox on predicted heavy metal- chelate equilibria in soils Soil Sci Soc Am J 43, 39–47 Steele M C and Pichtel J 1998 Ex-situ remediation of metal contaminated...

Ngày tải lên: 16/03/2014, 00:07

... retention and remobilization of metals To so, we have included information about clay mineralogy and organic carbon content of the soil samples taken from the same site where Sansalone and Buchberger ... 3110) and X-ray diffraction (XRD, Siemens D-500) Figure Study area showing location of Cincinnati and the positions of sampling stations (After Sansalone et al., 1998) 298 D TURER ET AL HEAVY METAL ... M., Wandiga, S O., Njenga, G K and Nyatebe, J O.: 1991, Bull Environ Contam Toxicol 46, 782 Sansalone, J and Buchberger, S G.: 1997, ASCE Journal of Environmental Engineering 123, 134 Sansalone,...

Ngày tải lên: 16/03/2014, 00:25

... accumulation and detoxification of heavy metals such as cadmium (Hogstrand et al 1991) E xam ini n g correla t i on s bet w ee n f is h w ei gh t and t i ssu e met al concentrations and between heavy metal ... correlation between the individual weight and the heavy metal burden of A lucii from different limnic biotopes and the same relationship was observed for cadmium at each sample site in the present study ... host weight , acanthocephalan weight and metal levels in organs of the fish and the parasites 16 Figure Lead (a) and cadmium (b) concentrations in muscle, liver and intestine of perch, its intestinal...

Ngày tải lên: 28/07/2014, 17:21

... 2.3.2 Sampling and sample preparation Surface water and sediment samples were collected from various places in Thadluang marsh Sample were collected and prepared for experiments in a standard ... of dangers of heavy metals content in water and sediment - High residue levels in water and sediment - Threat to farmers’ health and aquatic ecosystems due to misuse and misunderstand - Using polluted ... accumulate heavy metals This research aims to get quantitative determination of four main heavy metals (such as Pb, Cd, Zn, Cu) in water and sediment samples in the ThadLuang Marsh and assessments...

Ngày tải lên: 09/01/2015, 08:53

... semimetal, light metal, heavy metal, essential metal and trace metal (Atkins and Jones 1997) Over the past two decades, the term heavy metal has been used increasingly in various publications and ... detection and removal of heavy metal ions was feasible and achievable The prepared multifunctional membranes can detect and remove heavy metal ions in a wide variation of solution conditions, and the ... detection and adsorptive removal of heavy metal ions from aqueous solutions, which will have significant importance in heavy metal pollution control and remediation 1.2 Research objectives and scopes...

Ngày tải lên: 09/09/2015, 17:52

... mud in the treatment of heavy metals in water in some industries Find out the type of adsorbent efficiency of heavy metal ions Cd 2+, Cu2+, Zn2+ and As(V) in water, handle partial source of waste ... affect crops entering aquifers causing water pollution Heavy metal is the concept to denote metal atoms high toxicity and often for life Heavy metals Hg, Cd, Pb, As, Sb, Cr, Cu, Zn, Mn, are not ... EDS-FESEM showed that Al and Fe are two main components of particulate materials BVNQ and BOS The results of empirical research and theory, mechanism of ion adsorption heavy metals and arsenic particles...

Ngày tải lên: 05/04/2016, 10:29

... chemical property for charcoal and heavy metals in soil and water, and so on Since heavy metals are known to be transported in water combined with DOM, the removal of heavy metals linked with DOM needs ... coefficients of the concentration at IN and OUT, and the reduction rates among TOC, nutrients and metals are shown in Table 4, and - 15 - Journal of Water and Environment Technology, Vol 7, No ... relationship between the removal rate for TOC, TN, TP, and heavy metals (Cr, Fe, Pb, Zn) and the contact time between the drainage water and the charcoal was analyzed Secondly, the correlations...

Ngày tải lên: 05/09/2013, 09:38

... and condensation m phase < is assumed, so that the mass balance equations for both ( ) ( ) phases are; ∇ ⋅ ((1 − sat )ρ g εu g ) = m phase (8) ∇ ⋅ (sat.ρ l εu l ) = m phase (9) where sat is saturation, ... to the development and optimization of fuel cells, improve long-term performance and lifetime, the introduction of cheaper materials and fabrication techniques, and the design and development of ... significant physical processes and the key parameters affecting fuel cell performance The model accounts for both gas and liquid phase in the same computational domain, and thus allows for the implementation...

Ngày tải lên: 05/09/2013, 14:58

... tend to include plenty of sweet and salty tastes in our diet, and sweet has a tendency to create dampness (which is how the Chinese understand excess weight) and salty causes water retention The ... intricate and involved than we can understand easily Therefore, we should trust what thousands of years of culture have taught us We should eat what our mothers and their mothers ate Some people say, ... is indigestible and just adds bulk to your stool You can, and should, get all the vitamins and fiber you need from vegetables and fruits Brown rice and white rice have roughly the same number of...

Ngày tải lên: 15/02/2014, 15:20

... have the tools I need, the will to use them, and the experience to know they work The tools are now in your hands Live long and prosper John Walker Sausalito, California January, 1991 INTRODUCTION ... yet few of us are willing to sacrifice its stimulation and excitement to recapture the placid and serene life of simpler times Stress is a primary cause of overeating and weight gain You’ll learn ... different, and no one diet is right for all This book will help you find a diet plan that works for you lose weight Lose weight rapidly, and keep it off permanently Losing weight isn’t pleasant, and...

Ngày tải lên: 15/02/2014, 15:20

... on both the Supervisory Stress and Supervisory Baselines scenarios, as well as on stress and baseline scenarios that each firm developed independently (the "BHC Stress" and "BHC Baseline" scenarios, ... exercise before and that time might be needed to build and implement the internal systems necessary to satisfy the rigorous data collection requirements needed for a separate supervisory stress test ... capital plan, with internal stress tests and forward-looking capital projections under four scenarios: BHC baseline, BHC stress, supervisory baseline, and supervisory stress Data submissions requested...

Ngày tải lên: 06/03/2014, 09:20

... Negative difference bands at 1525 and 1347 cm)1 refer to the symmetric and anti-symmetric vibrations of the NO2 group in cgATP identied previously [25] For comparison and further band assignment, ... intermediate I and Pi are proportional to the absorption changes at 1255 cm)1 (vas a-b-ATP band), 1338 cm)1 (unidentied protein side chain band) and 1078 cm)1 (inorganic phosphate band), respectively ... of CopB-B with ATP and c-18O4-ATP, respectively The positive band at 1137 cm)1 observed in the 16O compound is downshifted to 1089 cm)1 in the c-18O4-labelled ATP, and this band can therefore...

Ngày tải lên: 07/03/2014, 00:20

... angles between the effective and static magnetic field directions (5, 15, 25, 35, 45 and 54.7°) and six mixing times (25, 50, 75, 100, 150 and 200 ms) were used For metal- reduced glutathione, the ... Mendoza-Cozatl D, Loza-Tavera H, Hernandez-Navarro A & Moreno-Sanchez R (2005) Sulfur assimilation and glutathione metabolism under cadmium stress in yeast, protists and plants FEMS Microbiol Rev 29, ... with 2% glucose as a carbon source and with auxotrophic requirements (uracil, histidine, lysine, leucine and 30 lm glutathione) when necessary (strain Dgsh2) The standard yeast nitrogen base medium...

Ngày tải lên: 15/03/2014, 00:20