Header menu link for other important links
X
Enhanced removal of PhACs in RBF supplemented with biofilm coated adsorbent barrier: Experimental and model studies
Published in Elsevier B.V.
2018
Volume: 338
   
Pages: 341 - 357
Abstract
The present study focussed on potential application of river bank filtration (RBF) for the effective removal of pharmaceutically active compounds (PhACs), namely, atenolol, ciprofloxacin and gemfibrozil. Experiments on RBF were performed in a pilot scale reactor (3.0 m × 1.0 m × 0.5 m) in which two dimensional unconfined aquifer flow conditions were induced by pumping to depict realistic field conditions. Initially, experiments were carried out in a reactor filled with natural river bed material. The natural attenuation efficiencies were found to be 21, 35 and 8% for atenolol, ciprofloxacin and gemfibrozil, respectively. Pumping experiments conducted through clean sand in RBF indicated that PhACs were highly mobile with minimal degradation. In order to improve the treatment efficiency of RBF, biofilm coated clay composite adsorbent was synthesized and used in a reactive barrier. The reactive barrier could significantly eliminate PhACs up to 80, 90, 75% for atenolol, ciprofloxacin and gemfibrozil, respectively, at the extracting well (located at 125 cm from the inlet) even after 150 h. Pumping experiments showed that 20 cm thick barrier was able to contain the movement of contaminant plume up to 4 h when water was pumped at a rate of 0.0075 L/s and up to 3.2 h when the pumping rate was 0.01 L/s. Further, a 2D reactive transport model was developed and validated based on the experimental data. The transport model would be useful for developing a management model for the optimal design of reactive barrier for enhancing the performance of RBF. © 2018 Elsevier B.V.
About the journal
JournalData powered by TypesetChemical Engineering Journal
PublisherData powered by TypesetElsevier B.V.
ISSN13858947
Open AccessNo
Concepts (18)
  •  related image
    Antibiotics
  •  related image
    Aquifers
  •  related image
    BANKS (BODIES OF WATER)
  •  related image
    Biofilms
  •  related image
    Drug products
  •  related image
    Efficiency
  •  related image
    NATURAL ATTENUATION
  •  related image
    Pumps
  •  related image
    Rivers
  •  related image
    PERMEABLE REACTIVE BARRIERS
  •  related image
    PHARMACEUTICALLY ACTIVE COMPOUNDS
  •  related image
    PILOT-SCALE REACTORS
  •  related image
    REACTIVE TRANSPORT MODELING
  •  related image
    REALISTIC FIELD CONDITIONS
  •  related image
    RIVER BANK FILTRATIONS
  •  related image
    TREATMENT EFFICIENCY
  •  related image
    UNCONFINED AQUIFERS
  •  related image
    Radial basis function networks