K.V.K. Chaitanya

Jawaharlal Nehru Technological University, Hyderabad, Bhaganagar, Telangana, India

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Publications (2)0 Total impact

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    ABSTRACT: Batch biosorption studies were carried out for the removal of nickel and copper using biosorbents, from single metal aqueous solutions. Treated and untreated effluent, soil and sludge samples were collected from selected points of chrome plating unit located at Visakhapatnam. The collected samples were analyzed for physico-chemical quality. The effects of some of the major parameters of biosorption, viz. contact time, dose of biosorbent, pH and initial metal concentration were studied and optimized. The optimum contact time, biosorbent dosage and pH were found to be 1 hr, 5 g/L and 10 respectively. The percentage removal of nickel and copper for an initial concentration of 20 ppm, for a dosage of 5 g/ L of dry fungal biomass at pH 10 and for a contact time of 1 hr was found to be 75.5% and 55.5% respectively, whereas, for an initial concentration of 100 ppm under the same optimum conditions, it was found to be 71% and 50% indicating that even at high concentration of metal ions the efficiency of biosorption is high. The dry fungal biomass has more favorable sites for nickel than copper ions.
    No preview · Article · Jan 2009
  • Sk.K. Beebi · M.V.V.C. Lakshmi · V. Sridevi · K.M. Elizabeth · K.V.K. Chaitanya
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    ABSTRACT: In the present study an attempt was made to remove nickel using live bacterial cultures from single metal aqueous solutions. Treated and untreated effluent, soil and sludge samples were collected from selected points of Chrome plating unit located at Visakhapatnam. The collected samples were analyzed for physico-chemical quality and used for isolation of nickel tolerant bacteria. The isolated bacteria was mass cultured and used for the removal of nickel. A special staining mechanisms was used to observe the concentration of the metal within the cells. The culture was identified with its morphological and cultural characteristics. Morphologically distinct strains of bacteria, isolated from media containing 100 mg/L nickel, were shown to be capable of concentrating nickel. The result obtained from the bacterial studies showed that the live bacterial biomass of gram positive Bacilli, Diplo cocci, and Pseudomonas species has the potential to remove nickel from single metal solution. The maximum biomass production was attained after five day in the absence of nickel but after nine day in the presence of nickel. This indicates that the bacteria have an intrinsic ability to absorb nickel from solutions.
    No preview · Article · Jan 2007

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  • 2009
    • Jawaharlal Nehru Technological University, Hyderabad
      Bhaganagar, Telangana, India