摘要
对改性稻草秸秆吸附去除低浓度含油污水的效果进行了研究,稻草秸秆改性采用磷酸活化后高温改性。对其改性温度条件进行了优化,结果表明稻草秸秆最佳改性温度为500℃。考察了改性稻草的投加量和粒径,含油污水的盐度和温度等条件对低浓度含油污水吸附去除效果的影响。当改性稻草投加量为0.8 g/L时,对60 mg/L的含油污水中原油的去除率达到89.5%;原油的吸附去除效果随着样品粒径变小吸附能力提高,在盐度为15‰~30‰,温度为10~35℃,改性稻草秸秆对低浓度含油污水具有较好的吸附去除效果。改性稻草秸秆对低浓度含油污水的吸附过程符合准二阶动力学模型。
The adsorption treatment of low concentration oil wastewater by modified straw stalk was explored in this paper. The straw stalk was modified by H3PO4 activated with high temperature carbonization. The modified temperature was optimized, and 500 ℃ was the suitable modified temperature for straw stalk. The factors such as the dosage and particle size of the adsorbent, salinity and temperature of the oil wastewater, which affected crude oil adsorption removal were studied. When the oil concentration of crude oil wastewater was 60 mg/L, the removal efficiency of crude oil could reach 89.5% by 0.8 g/L modified straw stalk. The crude oil adsorption capacity of modified straw stalk increased followed by the particle size modified straw stalk decreased. The treatment of low concentration oil wastewater by modified straw stalk got higher adsorption removal efficiency when the salinity was 15‰~30‰ and the temperature was 10-35 ℃. The crude oil adsorption process of modified straw stalk in the low concentration oil wastewater could be described by pseudo second-order rate equation.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2015年第6期156-160,共5页
Environmental Science & Technology
基金
浙江省自然科学基金(LQ13D060001
LY14D060003)
舟山市科技计划项目(2014C41004)
关键词
稻草秸秆
低浓度含油污水
吸附
straw stalk
low concentration oil wastewater
adsorption
作者简介
作者简介：陈庆国（1984-），男，讲师，博士，主要研究方向为水污染治理与资源化利用，（电子信箱）qgchen@zjou．edu．cn。
通讯作者，女，助理实验师，硕士．主要研究方向为水处理材料的开发与利用，（电话）0580-2550753（电子信箱）liumei@zjou．edu．cn。
