摘要
污泥回收利用,制备具有附加值的产品对环境保护具有十分重要的意义。为此提出了一种对污泥进行炭化活化处理,获得具有优异吸附性能的活性炭的工艺方案。以污泥为主要原料,掺杂少量玉米秸秆,经过高温炭化后,再利用K_(2)CO_(3)作为活化剂,在氮气气氛下活化处理制备污泥活性炭,不仅有利于污泥的资源化利用,而且降低了活性炭的生产成本。当K2CO3浓度为1 mol/L,活化温度为600℃时,制备得到的活性炭具有明显的多孔结构,比表面积为55.7 m^(2)/g,总孔体积为0.043 cm^(3)/g,平均孔径为3.1 nm。该成品污泥活性炭在室温下进行对硝基苯酚的吸附试验,1 h后吸附量为14.4 mg/g。
Sludge recycling for value-added products is of great importance for environmental protection. Herein, we propose an artful strategy to carbonize sludge and obtain activated carbon(AC) with superior adsorption performances. The AC was prepared through calcination and activation of sludge including a small amount of corn straw and activator of K_(2)CO_(3)under nitrogen atmosphere, which can not only benefit the resource utilization of sludge, but also reduce the production cost of AC. When the K_(2)CO_(3)concentration was 1 mol/L, and the activation temperature was 600 ℃, the as-formed AC possessed a hierarchically porous structure, with a specific surface area of 55.7 m^(2)/g, a total pore volume of 0.043 cm^(3)/g and an average pore size of 3.1 nm. The corresponding p-nitrophenol adsorption capacity of the AC prepared from sludge is 14.4 mg/g after 1 h at room temperature.
作者
童裳慧
宋恒
马军
TONG Shanghui;SONG Heng;MA Jun(School of Environment,Harbin Institute of Technology,Harbin 15000l,China)
出处
《给水排水》
CSCD
北大核心
2022年第11期35-38,69,共5页
Water & Wastewater Engineering
基金
国家重点研发计划项目(2021YFC2600303)。
关键词
污泥
活性炭
化学活化
资源利用
对硝基苯酚
Sludge
Activated carbon
Chemical activation
Resource utilization
P-nitrophenol
