Document Details

Document Type : Project 
Document Title :
Microbial properties of sandy soils experimentally contaminated with heavy metals.
الخصائص الميكروبية لتربة رملية ملوثة تجريبيا بالمعادن الثقيلة
 
Document Language : Arabic 
Abstract : The current study aimed to evaluate the nine measurements of microbiological and biological weapons could be used as evidence to help in tracking the toxicity and availability of heavy metals in sandy soil and study their effects on the growth and activity of microbial communities and the characteristics of sandy soils. We have been assessing the number of bacteria, Aloktinomisiat, fungi, and measurement of respiration rates basic catalyst and assess the mass of carbon energy and estimate the mass ratio of microbial active and the proportion of the number of bacterial colonies colorful and tolerant of metals in samples of sandy soil contaminated with metals, lead, nickel, cobalt, mercury, copper, and added in concentrations 10, 100, 1000 ppm and incubated for different time periods are 1, 90 180 days after the occurrence of pollution. The different effects of sandy soil pollution with heavy metals as metal type, concentration and duration of exposure to it. On average, the lower the relative toxicity of heavy metals tested at a concentration of 1000 parts per million as follows mercury> copper> nickel> lead> cobalt. The high concentrations of heavy metals more activation compared to different concentrations of low-and showed that stimulation in some cases. In general, the lower toxicity of heavy metals on soil microorganisms sandy increase exposure time. Has resulted in contamination of sandy soils with heavy metals, particularly high concentrations to reduce the numbers of bacteria and Aloktinomisiat, fungi, and also to the reduction in the rates of respiration basic catalyst may be and the content of the cluster carbon microbial, but it showed little impact in the mass ratio of microbial active and increase in the preparation of bacterial colonies colorful and tolerant of heavy metals. Regarding the stability of measurements of microbiological used in this study and their possible use as indicators is vital to measure the contamination of sandy soils with heavy metals, the results showed the possibility to take advantage of the numbers of Aloktinomisiat and numbers of bacteria colorful and tolerant of metals in addition to rates of breathing catalyst if the control in the rates of moisture. Perhaps what distinguishes the first three measurements are more sensitive and less in cost and uncomplicated as indicators of vitality. 
Publishing Year : 1421 AH
2001 AD 
Sponsor Name : kau 
Sponsorship Year : 1421 AH
2001 AD 
Added Date : Wednesday, April 30, 2008 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
فهد عبدالرحمن الفاسيalfassi, fahad abdulrahmanInvestigatorDoctorate 

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