印染污泥水热减量及产物作为类芬顿催化剂研究  

Study on Hydrothermal Reduction of Printing and Dyeing Sludge and Its Product as Fenton-like Catalyst

作　　者：方庭玕 王艺晓 安靖 薛罡[1] FANG Tinggan;WANG Yixiao;AN Jing;XUE Gang(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;North China Municipal Engineering Design&Research Institute Company Limited,Tianjin 30000,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]中国市政工程华北设计研究总院有限公司,大津300000

出　　处：《水处理技术》2021年第6期64-69,共6页Technology of Water Treatment

基　　金：国家自然科学基金资助项目(51878135)。

摘　　要：采用水热法处理印染污泥,并将产物作为类芬顿催化剂处理质量浓度50 mg/L的亚甲基蓝溶液。结果表明,当水热温度220℃、水热时间4 h、NaOH投加量0.16 g/g时,污泥减量效果为佳,其干基减量率达到55%,而总减量率达到81%。水热炭能有效催化H2O2氧化降解亚甲基蓝。优化反应条件:水热炭投加量0.8 g/L,H2O2投加量0.8 mL/L,溶液pH为3,反应0.5 h后基本达到平衡,对亚甲基蓝的去除率高达98%。污泥在水热过程中,部分Fe^(3+)被还原为Fe^(2+),主要以Fe(OH)_(2)的形式存在。水热炭具有磁性,可以通过磁体对其进行回收,实现了资源的最大化利用。Printing and dyeing sludge was treated by hydrothermal method, and the product was used as Fenton-like catalyst to treat methylene blue solution with mass concentration of 50 mg/L. The results showed that, when the hydrothermal temperature, hydrothermal time and NaOH dosage were 220 ℃, 4 h and 0.16 g/g, respectively, the sludge reduction effect was the best, with the dry basis reduction rate reaching 55% and the total reduction rate reaching 81%. Hydrochar could effectively catalyze H2O2 to degrade methylene blue. The optimal reaction conditions were as follows, the dosage of hydrochar and H2O2 were 0.8 g/L and 0.8 mL/L respectively, and the pH of the solution was 3, after reaction of 0.5 h, the equilibrium was basically reached, and the removal rate of methylene blue was as high as 98%. Some Fe^(3)+ was reduced to Fe^(2+) during the hydrothermal process, mainly in the form of Fe(OH)_(2). In addition, hydrochar had magnetism, which could be recovered by magnets to maximize the utilization of resources.

关 键 词：印染污泥 水热法 减量 类芬顿催化剂 亚甲基蓝 

分 类 号：X791[环境科学与工程—环境工程]