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Effect of Long-term Application of Oil Refinery Wastewater on Soil Health with Special Reference to Microbiological Characteristics by S. Hayat; Iqbal Ahmad; Z.M. Azam; A. Ahmad; A. Inam; Samiullah is a Engineering article available to read on EtoBox.

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The ground water (GW), treated wastewater (TW) and the soil at the agricultural farm in the premises of the Mathura Oil Refinery have been monitored for various physico-chemical characteristics, over the last 12 years (1987-1998). It was noted that the heavy metal content in the soil, repeatedly irrigated with TW, was increasing because the wastewater itself was a better source of these metals than GW. However, the level of these metals, both in the wastewater and the soil, was very much below the permissible limits. The quantitative analysis of various functional groups of microorganism and their interaction with metals revealed that the viable count of aerobic heterotrophs, asymbiotic nitrogen fixers, actinomycetes and fungi were in the ranges of 2.6 x 10(6)-7.2 x 10(7), 5.0 x 10(4)-6.8 x 10(5), 2.0 x 10(4)-2.8 x 10(5) and 2.5 x 10(4)-7.5 x 10(5), respectively. The presence of Rhizobium spp. in the soil was shown by the nodulation in the leguminous crops cultivated in the experimental field. The significant viable counts of above functional groups of bacteria on each heavy metal supplemented plate indicated that these populations could tolerate high levels (> or = 200 microg/ml)

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Author

S. Hayat; Iqbal Ahmad; Z.M. Azam; A. Ahmad; A. Inam; Samiullah

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0960-8524)

Published

2002

Language

EN

Field

Engineering (Physical Sciences)