碱性品红溶液的辐照降解

摘要

Basic fuchsin is an important red dye often used in printing and dyeing industry, which is one of the principal pollutants of dyeing wastewater. Radiation degradation of basic fuchsin in aqueous solution by 60Co y-ray was studied. The acidity of basic fuchsin solution increases and some precipitation form after being irradiated. With the increase of absorbed doses, the COD value and the chromaticity of basic fuchsin solution decrease conspicuously, but the infulence of absorbed dose rate is not obvious. Adding H2O2 with low concentration in basic fuchsin solution is beneficial to the removal of COD, but causes the increasing of TOC and decreasing of TIC.%碱性品红是印染工业中常用的一种红色染料,是印染废水的主要污染物之一.本工作利用γ射线对碱性品红溶液进行辐照降解,辐照后溶液酸性增强,并产生少量沉淀.随着吸收剂量的增加,碱性品红溶液的化学需氧量(COD)和色度均大大降低.吸收剂量相同时,碱性品红的浓度越低,COD和色度降低越明显,而吸收剂量率对碱性品红染料溶液的降解效率影响不大.向碱性品红溶液中加入较低含量的H2 O2有利于COD的去除,但是却引起总有机碳(TOC)增大,总无机碳(TIC)减小.