Article
Characterization of E1 Kraft Mill Effluent by Toxicity Identification Evaluation Methodology
Registro en:
Water, Air and Soil Pollution 199
1573-2932
Autor
Reyes, F.
Chamorro, S.
Yeber, María Cristina
Vidal, Gladys
Resumen
Artículo de publicación ISI In order to recover and reuse water in the Kraft mill process, evaluation of separate streams is required to identify toxic compounds or microcontaminants. The stage E1 Kraft effluent, corresponding to the first extraction step of the bleaching Kraft mill process, provides the main toxic compounds found in the final process effluent. This paper uses the toxicity identification evaluation (TIE) procedure for the physicochemical and ecotoxicological characterization of the E1 Kraft effluent. To distinguish the most important toxic compounds, a physicochemical characterization and Phase I of the TIE procedure were performed. The acute toxic effect of the E1 Krafteffluent and treated fraction was performed on Daphnia magna. Results show that untreated E1 Kraft effluent exerts an acute toxic effect on D.magna (24 h LC50=27.6%), where the E1 Kraft effluent is characterized by pH 10.5, chemical organic demand (COD) 1,348.8 mg/l, and biological organic demand (BOD5) 397.5 mg/l, while total phenolic