title: Green Technology for the Removal of Chloro-Organics from Pulp and Paper Mill Wastewater.
abstract: This study evaluates the treatment efficiency of a horizontal subsurface-flow constructed wetland (HSSF-CW) for the removal of chloro-organic compounds from pulp and paper mill wastewater. The surface area of the HSSF-CW unit was 5.25 m² and was planted with Colocasia esculenta. The wastewater was characterized for different chloro-organic compounds, that is, adsorbable organic halides (AOX), chlorophenolics, and chlorinated resin and fatty acids (cRFAs). Under a hydraulic retention time of 5.9 days, the average AOX, chlorophenolics, and cRFA removal from wastewater was 87, 87, and 93%, respectively. Some of the chlorophenolics were found to accumulate in the plant biomass and soil material. The mass balance studies show that a significant fraction of chlorophenolics and cRFA was degraded in the constructed wetland system. Modeling studies were carried out to estimate the first-order area-based removal rate constants (k) for chemical oxygen demand removal. The HSSF-CW was found to be an effective treatment technology for the remediation of pulp and paper mill wastewater.
authors.affiliation: Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur Campus, Saharanpur-247001, U.P., India.
authors.forename: Ashutosh Kumar
authors.initials: AK
authors.lastname: Choudhary
authors.forename: Satish
authors.initials: S
authors.lastname: Kumar
authors.forename: Chhaya
authors.initials: C
authors.lastname: Sharma
authors.forename: Vivek
authors.initials: V
authors.lastname: Kumar
mesh_terms: D055772:Green Chemistry Technology / Q000379:methods*; D006843:Hydrocarbons, Chlorinated / Q000737:chemistry*; D007220:Industrial Waste / Q000032:analysis*; D010209:Paper; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D006843:Hydrocarbons, Chlorinated; D007220:Industrial Waste