摘要
研究吸附时间、pH、污泥投加量和温度等对厌氧颗粒污泥吸附水中孔雀石绿(MG)的影响。结果表明,在MG初始浓度为50 mg/L和60 mg/L时,平衡时间为30 min,在MG初始浓度为70 mg/L和80 mg/L时,平衡时间为50 min;在MG初始浓度为100 mg/L时,厌氧颗粒污泥吸附水中MG的最佳pH为6~8,最佳投加量为2.4 g/L(干重);厌氧颗粒污泥对MG的吸附能力随温度增加而增加,在40℃时最大吸附容量为137.696 mg/g。厌氧颗粒污泥对水中MG的吸附可以采用Redlich-Peterson模型进行描述,表明厌氧颗粒污泥对MG的吸附并非理想的单层吸附,而是物理吸附和生物化学吸附共同作用的结果;MG与厌氧颗粒污泥作用的速率取决于化学吸附,其中液膜内扩散速率是限制厌氧颗粒污泥对MG吸附的主要因素。
The effects of adsorption time,pH,sludge dosage and temperature on the adsorption characteristics of anaerobic granular sludge to malachite green(MG)were studied.The results showed that when the initial concentration of MG was 50 mg/L and 60 mg/L,the equilibrium time was 30 min,when the initial concentration of MG was 70 mg/L and 80 mg/L,the equilibrium time was 50 min;when the initial concentration of MG was 100 mg/L,the optimal pH for anaerobic granular sludge to adsorb MG in water was 6~8,and the optimal dosage was 2.4 g/L(dry weight);the adsorption capacity of anaerobic granular sludge for MG increased with temperature increase,the maximum adsorption capacity was 137.696 mg/g at 40℃.Anaerobic granular sludge adsorption of MG in water by anaerobic granular sludge can be described by the Redlich-Peterson model.The result showed that the adsorption of MG by anaerobic granular sludge was not an ideal single-layer adsorption,but a combination of physical adsorption and biochemical adsorption to fit the adsorption result;the rate of action of MG and anaerobic granular sludge depended on chemical adsorption of which liquid film diffusion was the main factor limiting the adsorption of MG by anaerobic granular sludge.
作者
王西峰
吴振涛
邓仁健
王宇飞
胡晓莲
WANG Xi-feng;WU Zhen-tao;DENG Ren-jian;WANG Yu-fei;HU Xiao-lian(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)
出处
《应用化工》
CAS
CSCD
北大核心
2021年第5期1204-1210,共7页
Applied Chemical Industry
基金
国家自然科学基金资助项目(41672350)。
