Pollution of the biosphere by heavy metals has caught our attention in finding new ways to sustain, restore and manage the environment. In this context, the study was carried out to assess and determine the cumulative effect of heavy metals on soil microorganisms and seed germination, which ultimately contribute serious threats to the ecosystem. We attempted to isolate stress tolerant bacteria ...

abstract heavy metals are the most important components of environment pollution. soil contaminated by industrial and mining activities of these elements into the soil-plant-human cycle and accumulate in the human or animal body tissue to reach the levels of toxic for animals and humans. for this purpose, a broad sampling of soil, plant and sheep liver were taken and the amount of pb were teste...

Title of dissertation: EFFICIENCY AND ECOLOGICAL RISKS OF REDUCING SOIL PH DURING THLASPI CAERULESCENS PHYTOEXTRACTION OF CADMIUM AND ZINC Shengchun Wang, Doctor of Philosophy, 2004 Dissertation directed by: Professor Jay Scott Angle Department of Natural Resource Sciences and Landscape Architecture The major aims of this research were to determine whether reducing soil pH can enhance phytoextr...

abstract enhancing phytoextraction with aminopolycarboxylic acids (apcas) associated with fast growing and metal tolerant plants species has been proposed for the clean-up of heavy metal contaminated soils. the objectives of this study were to assess the efficiency of edta and nta for desorbing pb from soil and to compare their effects for enhancing of pb extraction with land cress (barbara ver...

this research was conducted on polluted soil near the lead and zinc factory in zanjan province through which the effects of two organic and three mineral sources were examined on heavy metals fixation in randomized experiment design. experimental treatments includes bagasse and rice husk in three levels: 1.25, 2.5 and 5%, zeolite in three levels: 5%, 10% and 15%, phosphate rock in three rates: ...

The present study was aimed at comparing the ability of three crop plants for phytoremediation of zinc (Zn) and nickel (Zn) from soils. A factorial (3×2×3) experiment based on RCBD was used to compare the treatments, and was repeated three times. The first factor was crop type (wheat, clover and rapeseed), the second factor was heavy metal types (zinc (Zn) and nickel (Ni)) and the third factor ...

The purpose of this study was to explore the effects of soil contamination by selected metals (cadmium, copper, nickel, lead or zinc) on the antioxidant response of Vicia faba plants. The levels of the antioxidants: glutathione, proline, non-protein thiols, as well as guaiacol peroxidase and catalase activities were measured in the upper parts of plants. Additionally, the potential bioavailabil...

this study was conducted in halgheh darreh waste disposal site in karaj in order to determine the concentration of ni and pb in halimocnemis pilifera and in region’s soil. three 50*50 m plots in the direction of the prevailing wind were selected. the first plot was close to the leachate ponds and the next two plots were located at 500 and 1000 m from the first plot, respectively. ten random sam...