摘要
采用Fenton试剂对污泥进行预处理,将制成的污泥基活性炭(SBAC)作为环保材料应用于吸附治理环境水体中腐殖酸,研究了吸附过程中的理论问题。实验结果表明,Fenton试剂对污泥进行预处理可有效改善吸附材料的化学活性并提高污泥基活性炭(SBAC)的孔隙率(比表面积由原来的92.65m2/g增加至172.8m2/g),增大了材料的吸附容量;近中性水液中吸附容量较大,升高温度有利于吸附;298K,pH值=8时,污泥基活性炭对腐殖酸的最大吸附容量为89.63mg/g,大于市售颗粒活性炭和凹凸棒/活性炭;吸附过程符合Freundlich等温模型,对吸附动力学的拟合结果表明,该过程更符合Lagergren二级动力学方程;吸附过程吸热、熵值增加,常温下可自发进行。污泥基活性炭可用于吸附去除水体中腐殖酸。
The sludge based activated carbon （SBAC）, which was prepared with Fenton pretreatment, was used as environmental friendly materials to remove humic acid in environmental water. The theoretical problems in the process were investigated in this research. The results showed that with Fenton pretreatment of sludge, the chemical properties and adsorption capacities of SBAC could be effectively improved, the BET of which increased from 92.65 to 172.8 m 2/g. The adsorption capacity was larger when the aqueous solution was near neutral. The adsorption capacity increased with the rise of temperature. Furthermore, based on the Freundlich model analysis, the maximum adsorption capacity of HA on SBAC was 87.63 m 2/g at 298 K under the pH value of 8, which was larger than that of the commercially available activated carbon and attapulgite/active carbon composite. The adsorption kinetics could be better described by the Lagergren-second-model. The reaction was endothermic and entropy increasing, and could be carried out spontaneously at room temperature. In a word, sludge based activated carbon can be used for the adsorption and removal of humic acids in wastewater.
作者
潘旻旻
闻海峰
黄浦
施文健
谷麟
PAN Minmin;WEN Haifeng;HUANG Pu;SHI Wenjian;GU Lin(Academy of Environment and Architecture,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《功能材料》
EI
CAS
CSCD
北大核心
2018年第11期11156-11162,共7页
Journal of Functional Materials
基金
国家自然科学青年基金资助项目(51408358)
关键词
FENTON
污泥基活性炭
表征
吸附
腐殖酸
动力学
热力学
吸附机理
Fenton
the sludge based activated carbon
characterization
adsorption
humic acid （HA）
dynamics
thermodynamics
adsorption mechanism
