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In situ immobilization of heavy metals with tetraethylenepentamine (tetren) in natural soils and its effect on toxicity and plant growth (1983)

Smeulders, F. ; Maes, A. ; Sinnaeve, J. ; [et al.]

Springer

Plant and soil 70 (1983), S. 37-47

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ISSN: 1573-5036

Keywords: Cadmium ; Cation exchange ; Copper ; Heavy metals ; Illite clay ; Nickel ; Organic matter ; Tetraethylenepentamine ; Tetren ; Transition metal complexes ; Zinc

Source: Springer Online Journal Archives 1860-2000

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: Summary The ion exchange behavior of heavy metals (Cu, Zn, Ni, Cd) in soils is shown to be strongly influenced by complex formation with tetraethylenepentamine (tetren). In a heavy clay (illite) soil, the metal (complex) concentration in the equilibrium solution is lowered by some two orders of magnitude, as compared to the aqueous metal ions. In a sandy loam, in which the exchange properties are nearly exclusively due to organic matter, the addition of tetren leads to a significant increase of the metal (complex) in solution. These effects are interpreted in terms of the high adsorption selectivity of the metal complexes for clay particles (illite clay) and the competition of tetren with the chelating groups of the humic fraction (sandy loam). In this case the resulting tetren complexes remain in solution and can be immobilized by addition of small amounts of clay to such a soil.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF02374748

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In vitro cytogenetic effects of 2450 MHz waves on human peripheral blood lymphocytes (1993)

Maes, A. ; Verschaeve, L. ; Arroyo, A. ; [et al.]

New York, NY [u.a.] : Wiley-Blackwell

Bioelectromagnetics 14 (1993), S. 495-501

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ISSN: 0197-8462

Keywords: pulsed microwaves ; normothermal conditions ; chromosome aberrations ; micro-nuclei ; SCE ; Life and Medical Sciences ; Occupational Health and Environmental Toxicology

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Biology , Physics

Notes: Cytogenetic analyses were performed on human peripheral blood lymphocytes exposed to 2450 MHz microwaves during 30 and 120 min at a constant temperature of 36.1°C (body temperature). The temperature was kept constant by means of a temperature probe put in the blood sample which gives feedback to a microcomputer that controls the microwave supply. We found a marked increase in the frequency of chromosome aberrations (including dicentric chromosomes and acentric fragments) and micronuclei. On the other hand the microwave exposure did not influence the cell kinetics nor the sister chromatid exchange (SCE) frequency. ©1993 Wiley-Liss, Inc.

Additional Material: 2 Ill.