典型印染废水处理过程中芳香烃化合物的污染特征及污泥生态风险评价  

Pollution characteristics of aromatic hydrocarbons and ecological risk assessment of the sludge in the typical textile dyeing wastewater treatment process

作　　者：王靖宇[1] 宁寻安[1] 李锐敬 温炜彬 杨佐毅[1] 贺睿哲 刘敬勇[1] 

机构地区：[1]广东工业大学环境科学与工程学院,广州510006

出　　处：《环境化学》2015年第6期1201-1208,共8页Environmental Chemistry

基　　金：广东省教育厅科技创新重点项目(2012CXZD0021);国家自然科学基金(51308132)资助

摘　　要：采用GC-MS测定了典型综合印染废水处理厂废水和污泥中芳香烃化合物的含量.结果表明,原水中苯系物总量为203.96±15.18μg·L-1,其中二甲苯占62.7%,尾水中苯系物总量为0.2±0.029μg·L-1,整个处理工艺对苯系物的去除效率为99%.原水中多环芳烃(PAHs)总浓度达1349.51±35.77 ng·L-1,以3—6环为主,主要富集在颗粒物上.整个工艺对PAHs的去除效率为95%,尾水中PAHs总浓度为65.81±20.99ng·L-1,以2—3环为主.干污泥中PAHs含量高达2996.10±151.0 ng·g-1,污泥吸附为水相中PAHs去除的主要机理之一.印染污泥直接填埋或农用会引起潜在的生态危害.Aromatic hydrocarbons were detected by gas chromatography-mass spectrometry in wastewater and sludge from a typical integrated textile dyeing wastewater treatment plant. Results demonstrated that ∑BTEX concentration in raw wastewater was 203. 96 ± 15. 18 μg·L- 1,and xylenes accounted for 62. 7% of the total BTEX. The entire process achieved 99% removal for ∑BTEX,and∑BTEX concentration of the final effluent was 0. 2 ±0. 029 μg·L- 1. In the raw wastewater,the total polycyclic aromatic hydrocarbons（ PAHs） concentration was 1349. 51 ± 35. 77 ng·L- 1,and the PAHs were mainly adsorbed onto the suspended particles present in the raw wastewater. The dominant compounds were 3—6 ring PAHs in the raw wastewater,while 2—3 ring PAHs predominated in the final effluent. ∑PAHs concentration in the dry sludge was 2996. 10 ± 151. 0 ng·g- 1,and adsorption to sludge was one of the significant removal mechanisms for PAHs in the aqueous phase. The landfill and agricultural reuse of the textile dyeing sludge may cause potential risk to ecosystem.

关 键 词：印染废水 污泥 苯系物 多环芳烃(PAHs) 生态风险评价. 

分 类 号：X791[环境科学与工程—环境工程] X82