Decontamination of Lead Polluted Soil Using Pseudomonas Aeruginosa Bacteria: A Biosorption Study
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2015, Vol 3, Issue 8
Abstract
The Soil may become contaminated with heavy metals and metalloids accumulation due to atmospheric deposition from natural (volcanoes, earthquakes etc.) and anthropogenic (Industrial and vehicular) emissions. Soil is the ultimate sink of any contaminant released to environment due to aforementioned activities. Heavy metals are known to have potential to pose serious risks and hazards to humans and the ecosystem. Lead accumulation in human body affects the neurological, hematological, gastrointestinal, cardiovascular and renal systems. The children (<5years) are more vulnerable to the neurotoxin effects. There are various in situ and ex situ remediation methods adopted to remove or reduce or extract the Lead from the soils. Among those bio remediation or bio sorption is found to be more advantageous. Hence, the present study is contemplated to determine the adsorption capacity of lead by the soil and bio remediating lead content using Pseudomonas bacteria and also to study the kinetics. The site soil is a well graded clayey soil with great affinity to lead ions. It is evident from the adsorption study that >95% of lead is adsorbed by the soil easily within 7.5h if the lead concentration is within 750mg/L in similar type of soil. Nutrient media is said to be best suited as supporting media for the bio sorption of lead using Pseudomonas bacteria. From model study it is clear that the adsorption is purely single layered chemo sorption. Hence, from this study it can be concluded that bio sorption using Pseudomonas with nutrient media is a promising bio remediation method for decontamination of sites with lead.
Authors and Affiliations
Nandini M R, Udayashankara T H, Madhukar M
Keywords
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