城市污泥腐殖酸和多糖回收及吸附性能研究
Study on the Recovery and Adsorption Ability of Humic Acids and Poly-saccharides From Urban Sludge
郭超 1史佳宁 2丁璐瑶 2李雨豪 2成庆利2
作者信息
- 1. 郑州莫大环保科技有限公司,河南 郑州 450000
- 2. 华北水利水电大学,河南 郑州 450000
- 折叠
摘要
[目的]探究碱-低热预处理方式对城市污泥释放腐殖酸和多糖的影响,测定腐殖酸和多糖吸附性能.[方法]采用碱-低热法预处理剩余污泥,从上清液中提取腐殖酸和多糖等碳材料,并以甲基橙染料为例,探讨碳材料的吸附性能.[结果]结果表明:最佳碱-低热法预处理条件为pH=12、反应温度T=90℃、反应时间t=60 min.准二级动力学模型和Freundlich方程更适合描述腐殖酸和多糖吸附甲基橙染料动力学和热力学过程.吸附过程为放热反应,物理扩散与化学吸附并存且自发易于进行.[结论]该预处理方法碳材料释放效果好、易操作,回收的腐殖酸和多糖吸附性能较好,可以为实现污泥资源化提供技术支撑.
Abstract
[Purposes]The effects of alkali-low heat pretreatment on the release of humic acid and poly-saccharide from municipal sludge were investigated,and the adsorption properties of humic acid and polysaccharide were determined.[Methods]In this study,the residual sludge was pretreated by alkali-low-heat method,the carbon materials such as humic acid and polysaccharide were extracted from the supernatant,and the adsorption properties of carbon materials were investigated by taking methyl orange dye as an example.[Findings]The results showed that the optimal pretreatment conditions of alkaline-low-heat method were pH=12,reaction temperature T=90℃,and reaction time t=60 min.The adsorption process is an exothermic reaction with physical diffusion and chemical adsorption coexisting,spontane-ous and easy to carry out.[Conclusions]This pretreatment method has good carbon material release ef-fect and is easy to operate,and the recovered humic acid and polysaccharide have better adsorption per-formance,which can provide technical support for the realization of sludge resourcing.
关键词
城市污泥/腐殖酸/多糖/吸附动力学/吸附热力学Key words
urban sludge/humic acids/polysaccharides/adsorption kinetics/adsorption thermodynamics引用本文复制引用
出版年
2024
NETL
NSTL
万方数据