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Removal of Chlorophenolics From Pulp and Paper Mill Wastewater Through Constructed Wetland
Author(s) -
Choudhary Ashutosh Kumar,
Kumar Satish,
Sharma Chhaya
Publication year - 2013
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143012x13415215907419
Subject(s) - constructed wetland , wastewater , environmental science , paper mill , wetland , pulp mill , hydraulic retention time , pulp (tooth) , environmental engineering , pulp and paper industry , subsurface flow , pollutant , phragmites , effluent , chemistry , groundwater , ecology , geology , medicine , geotechnical engineering , organic chemistry , pathology , engineering , biology
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 m 2 . 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.