摘要
研究了煤粉对模拟焦化废水二级出水中苯酚、喹啉的吸附,考察了pH、煤粉投加量、吸附反应时间等因素对吸附效果的影响。实验表明:煤粉对模拟废水中有机物的吸附去除率焦煤略高于肥煤,煤粉(-0.5mm)吸附容量为0.1094～0.1544mg/g;焦煤吸附苯酚、肥煤吸附喹啉符合Fre-undlich吸附等温式,焦煤吸附喹啉则符合Langmuir等温式;不同煤种和不同粒度煤粉吸附有机物的反应动力学特性相似,均较好符合二级反应动力学模型,R2=0.990±0.008;吸附过程以液膜扩散为速率控制步骤;在不同温度下得到了焦煤吸附苯酚的速率常数方程k=188.54e-11.64/(RT),吸附活化能Ea=11.64kJ/mol。
Studied the adsorption of phenol and quinoline in simulation coking wastewater effluent from secondary sedi- mentation tank on coal, and the factors such as pH, pulverized coal dosage as well as absorption reaction time effect on the adsorption. Tests show that the adsorption removal rate of organic pollutants by coke is slightly higher than the fat coal＇ s,adsorption capacity of coal （ -0. 5 ram） is 0. 109 4 -0. 154 4 mg/g. The adsorption of phenol with coke is consistent with the Freundlich adsorption isotherm, and the quinoline fits with the Langmuir adsorption isotherm, but the adsorption of quinolineis more in line with the Freundlich isotherm on fat coal. Adsorption reaction of organic pol- lutants is well conformed to the characteristics of second-order reaction kinetics on different types and particle size of pulverized coal, R2 = 0. 990 ± 0. 008. The adsorption process is controlled by liquid film diffusion. The rate constant e- quation k = 188.54e-11.64/（RT） and activation energy Ea = 11.64 kJ/mol may be obtained under different temperatures by the phenol adsorpted on coke.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2010年第2期299-302,共4页
Journal of China Coal Society
基金
安徽省自然科学基金重点资助项目(08040102002)
关键词
煤粉
焦化废水
吸附动力学
苯酚
喹啉
粒径
coal
coking wastewater
adsorption kinetics
phenol
quinoline
particle size
