title: Removal of chlorophenolics from pulp and paper mill wastewater through constructed wetland.
abstract: This study evaluates the treatment efficiency of horizontal subsurface flow (HSSF) constructed wetland for the removal of AOX (adsorbable organic halides) and chlorophenolics from pulp and paper mill wastewater. The dimensions of HSSF constructed wetland were 3.5 m in length, 1.5 m in width, and 0.28 m in depth, with surface area of 5.25 m2. The HSSF constructed wetland unit was planted with an ornamental plant species, Canna indica. Under hydraulic retention time (HRT) of 5.9 days, the average AOX removal was 89.1%, and 67% to 100% removal of chlorophenolics from pulp and paper mill wastewater was achieved. The complete removal of 2,3-dichlorophenol, 3,4-dichlorophenol, 2,3,5-trichlorophenol, 2,4,6-trichlorophenol, 3,5-dichlorocatechol, 3,6-dichlorocatechol, and 4,5,6-trichloroguaiacol was observed. Some of the chlorophenolics were found to accumulate in the plant biomass and soil. The evapotranspiration rate varied from 6.7 to 12.7 mm day(-1) during the experimental period. The mass balance of chlorophenolics was also studied in constructed wetland system.
authors: Department of Paper Technology, Indian Institute of Technology Roorkee, Saharanpur-247001, U.P., India. akchoudhary.env@gmail.com
authors: Ashutosh Kumar
authors: AK
authors: Choudhary
authors: Satish
authors: S
authors: Kumar
authors: Chhaya
authors: C
authors: Sharma
mesh_terms: D002733:Chlorophenols / Q000302:isolation & purification*; D007220:Industrial Waste; D010209:Paper; D013783:Textile Industry; D062065:Wastewater / Q000737:chemistry*; D053833:Wetlands
chemical_list: D002733:Chlorophenols; D007220:Industrial Waste; D062065:Wastewater