超临界水协同处理镍废水与生物质废弃物  

Simultaneous Treatment of Nickel Wastewater and Biomass Waste with Supercritical Water

作　　者：杨景 Yang Jing(Shaanxi Institute of Technology,Xi an 710300,China)

机构地区：[1]陕西国防工业职业技术学院,西安710300

出　　处：《粘接》2021年第10期37-41,共5页Adhesion

摘　　要：文章研究了超临界水气化生物质废弃物和镍回收。研究中,以玉米秸秆解聚残渣为生物质废弃物,与模拟的含镍废水在650℃和22.5MPa下进行同时处理。研究表明,镍废水中镍离子的浓度对玉米秸秆解聚残渣的气化效果有显著影响,当镍离子浓度达到2.5mmol/ml时,0.1g玉米秸秆解聚残渣的碳气化率达到99.8%,CO2为主要产气;且反应后固体残渣为镍单质及氧化镍,镍离子回收率接近100%。在这个过程中,玉米秸秆解聚残渣被氧化,镍离子被还原,且并未额外加入氧化剂或者还原剂。因此,生物质废弃物与重金属离子废水的协同处理可用于生物质的气化和废水中重金属离子的回收。This paper studies the supercritical water gasification of biomass waste and nickel recovery.In this research,the depolymerization residue of corn stover was used as biomass waste,and the simulated nickel-containing wastewater was treated simultaneously at 650℃and 22.5MPa.Studies have shown that the concentration of nickel ions in nickel wastewater has a significant impact on the gasification effect of corn stalk depolymerization residue.When the nickel ion concentration reaches 2.5 mmol/ml,the carbon gasification rate of 0.1 g corn stalk depolymerization residue reaches 99.8%,CO_(2) is the main gas produced;and the solid residue after the reaction is nickel elemental and nickel oxide,and the nickel ion recovery rate is close to 100%.In this process,the depolymerization residue of corn stover is oxidized and nickel ions are reduced,and no additional oxidizing or reducing agent is added.Therefore,the co-processing of biomass waste and heavy metal ion wastewater can be used for the gasification of biomass and the recovery of heavy metal ions in wastewater.

关 键 词：超临界水气化 玉米秸秆解聚残渣 镍废水 镍回收 协同处理 

分 类 号：X712[环境科学与工程—环境工程]