Enrichment of Cd, Cr, Pb and Biological Detoxification Strategies in Sewage Irrigated Soils

Aim: Long-term use of sewage-sludge and improper management agricultural lands can lead to an elevated heavy metal concentration in the soil resulting barren soil. The present investigation was carried out study influence different characteristics on enrichment Cd, Cr Pb their detoxification strategies sewage irrigated profiles Prayagraj region, India. Methodology: Di-acid mixture method used for analysis. clean filtrate estimation metals (Cd, Pb) by Atomic Absorption Spectrophotometer (AAS) (AAnalyst600, Perkin Elmer Inc., MA, USA). Isolation identification Detoxifying microorganisms were isolated from sewage-irrigated soils nutrient agar medium. Results: It observed that surface contained higher amount DTPA- extractable (Cd 3.00-3.20 mg kg-1,Cr 5.20-6.40 kg-1 6.80-7.20 kg-1) these amounts along with CEC (26.10 Cmol (p+) organic carbon (OC) Content (0.58%) decreased depth profiles. Among tested microorganisms, highest accumulation Citrobacter spp. extent Cd 13.2%, 36%, 42%. However, lowest Escherichia coli 1.2%, 8.4%, 10.2%. Conclusion: horizons A studied contain almost 12% more 9.11% Cr, 52% as compared contents B. Biological system uptake is largely influenced availability metals. order > selected >Bacillus Pseudomonas aerugia Rhizopus arrhizus coli, soils. GRAPHICAL ABSTRACT