heavy metals found in urban air with its toxic effects have a direct impact on human health. selection of appropriate tree species and shrub refining capacity of heavy metals in urban areas can greatly reduce the toxic effects of these materials. this study aimed to identify the most suitable tree and shrub species of broadleaf evergreen, deciduous and coniferous refinement of heavy metals lead...

aims: in the past few decades, more attention has been paid to clean up soils polluted with heavy metals by plants. a serious problem in this way is the amount of heavy metals uptake by plants. this study was conducted to evaluate the effectiveness of 3 local plants of mazandaran province, iran, in reducing and controlling the soil’s heavy metals. instrument & methods: the removal amount of thr...

Border, E. A., Cantrell, A. C., and Kilroe-Smith, T. A. (1976). British Journal of Industrial Medicine, 33, 85-87. The in vitro effect of zinc on the inhibition of human 8-aminolevulinic acid dehydratase by lead. The antagonistic effect of zinc on inhibition of human aminolevulinic acid dehydratase (ALAD) by lead was examined in vitro. The phenomenon was studied at pH 6 5-7 5. Zinc and lead wer...

Border, E. A., Cantrell, A. C., and Kilroe-Smith, T. A. (1976). British Journal of Industrial Medicine, 33, 85-87. The in vitro effect of zinc on the inhibition of human 8-aminolevulinic acid dehydratase by lead. The antagonistic effect of zinc on inhibition of human aminolevulinic acid dehydratase (ALAD) by lead was examined in vitro. The phenomenon was studied at pH 6 5-7 5. Zinc and lead wer...

lead, copper, cobalt, nickel, iron and zinc ions form monocitrate complexes (negative charge) in citrate solution which is absorbed on the citrate form of anion-exchange resins (citrate as counter ion) y exchange of citrate ion with citrate complexes. these are subsequently recovered from the resin by 0.5m ammonium citrate eluent at ph 2.0. under optimized conditions, quantitative recovery was ...

Background: Since heavy metals can accumulate in the tissues of aquatic organisms, they can cause a range of hazardous effects which can become harmful to humans. The aim of this study was to investigate the acute effects of some heavy metals as potential dangerous substances by assessing the mortality effects of Mercuric Chloride (HgCl2), Lead Chloride (PbCl2) and Zinc Sulfate (ZnSO4) pollutan...

We examined effects of heat, zinc, ion, and dithiothreitol in restoring the activity of lead-inhibited-5-aminolevulinate dehydratase (EC 4.2.1.24). The ratio of non-activated to activated activity produced by dithiothreitol correlated well with blood lead concentration among 35 lead workers. The individual effects of heat, zinc, or dithiothreitol differ from each other in the shift of pH optimu...