title: Phytoremediation of abandoned crude oil contaminated drill sites of Assam with the aid of a hydrocarbon-degrading bacterial formulation.
abstract: Environmental deterioration due to crude oil contamination and abandoned drill sites is an ecological concern in Assam. To revive such contaminated sites, afield study was conducted to phytoremediate four crude oil abandoned drill sites of Assam (Gelakey, Amguri, Lakwa, and Borholla) with the aid of two hydrocarbon-degrading Pseudomonas strains designated N3 and N4. All the drill sites were contaminated with 15.1 to 32.8% crude oil, and the soil was alkaline in nature (pH8.0-8.7) with low moisture content, low soil conductivity and low activities of the soil enzymes phosphatase, dehydrogenase and urease. In addition, N, P, K, and C contents were below threshold limits, and the soil contained high levels of heavy metals. Bio-augmentation was achieved by applying Pseudomonas aeruginosa strains N3 and N4 followed by the introduction of screened plant species Tectona grandis, Gmelina arborea, Azadirachta indica, and Michelia champaca. The findings established the feasibility of the phytoremediation of abandoned crude oil-contaminated drill sites in Assam using microbes and native plants.
authors.forename: R
authors.initials: R
authors.lastname: Yenn
authors.forename: M
authors.initials: M
authors.lastname: Borah
authors.forename: H P Deka
authors.initials: HP
authors.lastname: Boruah
authors.forename: A Sarma
authors.initials: AS
authors.lastname: Roy
authors.forename: R
authors.initials: R
authors.lastname: Baruah
authors.forename: N
authors.initials: N
authors.lastname: Saikia
authors.forename: O P
authors.initials: OP
authors.lastname: Sahu
authors.forename: A K
authors.initials: AK
authors.lastname: Tamuli
mesh_terms: D031601:Azadirachta / Q000378:metabolism* / Q000382:microbiology; D001673:Biodegradation, Environmental; D005240:Feasibility Studies; D006838:Hydrocarbons / Q000032:analysis / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D007194:India; D019686:Lamiaceae / Q000378:metabolism* / Q000382:microbiology; D029562:Magnoliaceae / Q000378:metabolism* / Q000382:microbiology; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism; D010578:Petroleum / Q000378:metabolism / Q000382:microbiology; D018515:Plant Leaves / Q000378:metabolism / Q000382:microbiology; D018517:Plant Roots / Q000378:metabolism / Q000382:microbiology; D018520:Plant Shoots / Q000378:metabolism / Q000382:microbiology; D011550:Pseudomonas aeruginosa / Q000378:metabolism*; D012987:Soil / Q000737:chemistry; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000032:analysis / Q000378:metabolism*
chemical_list: D006838:Hydrocarbons; D019216:Metals, Heavy; D010578:Petroleum; D012987:Soil; D012989:Soil Pollutants