摘要
在好氧的条件下,以活性污泥为接种体,使用改良斯特姆法测试脂肪酸浮选捕收剂(油酸钠、9-羟基硬脂酸钠、硬脂酸钠、蓖麻油酸钠)的生物降解性能,并与利用BOD5/COD进行的可生化评价方法进行比较。结果表明:(1)油酸钠、蓖麻油酸钠的BOD5/COD分别为0.54、0.63,属易生物降解物质;9-羟基硬脂酸钠、硬脂酸钠的BOD5/COD分别为0.36、0.37,属可生物降解物质。(2)油酸钠、9-羟基硬脂酸钠、蓖麻油酸钠28d的生物降解率分别为88.6%、62.2%、100.0%,达到了经济合作与发展组织的OECD-301B生物降解性能实验标准,属于易生物降解物质;硬脂酸钠28d的生物降解率为49.8%,没有达到OECD-301B生物降解性能实验标准,属难生物降解物质。4种脂肪酸浮选捕收剂的生物降解性能依次为:蓖麻油酸钠>油酸钠>9-羟基硬脂酸钠>硬脂酸钠。(3)当有机酸中存在碳碳双键和羟基时,有机酸的生物降解性能都会提高,并且碳碳双键的影响要大于羟基的影响;当二者同时存在时,生物降解性能会大幅度提高。
The biodegradation of 4 typical fatty acid collectors （sodium oleate,sodium 9-hydroxy stearate,sodium stearate,sodium ricinoleate） was performed under aerobic conditions with activated sludge as inoculum.The biodegradability of 4 fatty acid collectors was evaluated by modified Sturm test with CO2 production as the assessment index.After 28 d of biodegradation,the ultimate biodegradability of sodium oleate,sodium 9-hydroxy stearate,sodium ricinoleate,sodium stearate were 88.6%,62.2%,100.0% and 49.8%,respectively.According to OECD-301B classification standards for organic substance biodegradability experiments,sodium oleate,sodium 9-hydroxy stearate and sodium ricinoleate belonged to easily biodegradable type,and the final aerobic biodegradability of these four collectors follow the sequence of sodium ricinoleatesodium oleatesodium 9-hydroxy stearatesodium stearate.The results were in accordance with the BOD5/COD method.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2010年第9期5-8,共4页
Environmental Pollution & Control
基金
国家"863计划"资助项目--典型浮选药剂的降解性能及其环境安全性评价(No.2007AA06Z123)
