Impact of leaching from iron ore mines on terrestrial and aquatic environment
2012; National Environmental Science Academy; Volume: 2; Issue: 4 Linguagem: Inglês
ISSN
0976-4534
AutoresSunita Verma, P. R. Chaudhari, Shanta Satyanaranyan,
Tópico(s)Tailings Management and Properties
ResumoImproper disposal of overburden (OB) and tailings causes severe soil and water pollution. Therefore present study was carried out on overburden, their leaching levels and their effect on nearby water environment at Chiria mines of West Singhbhum district of Jharkhand, India. Studies revealed that the OB samples were neutral to marginally alkaline in nature (pH 7.2–7.6) with EC 0.07–0.09 ms/cm, Ca 0.75–1.30 mg/l, Mg 1.01–1.43 mg/l, Na 0.01–0.04 mg/l & K 0.08–0.12 mg/l. Low Cation Exchange Capacity & Nutrient content indicates poor productivity of overburden soil. OB showed higher concentration of Fe along with Mn, Pb and Zn as a typical characteristic of iron ore. OB was leached with acidic and distilled water and showed the presence of heavy metals at higher concentrations in acidic and low concentrations in distill water extract. Total 12 water samples surrounding the mining area was collected for physicochemical, biological and heavy metal analysis. Results indicated only the presence of marginally higher concentrations of heavy metals. Sodium adsorption ratio and percent sodium were also evaluated in the leachate samples to observe feasibilty of its use for land application.
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