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Electrochemical treatment of pentachlorophenol in water and pulp bleaching effluent

2007; Elsevier BV; Volume: 61; Issue: 2 Linguagem: Inglês

10.1016/j.seppur.2007.10.004

1873-3794

Upendra D. Patel, S. Suresh,

Lignin and Wood Chemistry

Adsorbable organic halides (AOX) compounds produced during bleaching of pulp are recalcitrant and known to have eco-toxic effect. We have studied the removal of pentachlorophenol (PCP) as a model AOX compound in water as well as in pulp bleaching effluent of a bamboo based mill by electrochemical treatment in batch mode. It was found that 10 mg L−1 of PCP in water was removed almost completely in 90% removal of initial colour, COD and PCP in <1 h. The treatment scheme presented here may be a promising technology for removal of AOX, COD and colour from pulp bleaching effluent. The estimated cost of combined treatment (potash alum coagulation + electrochemical) is US$ 0.7–0.9 per cubic meter of the raw pulp bleach effluent.