球型纳米颗粒Ca(OH)_(2)的制备及其强化污泥电渗透干化研究  

Preparation of spherical nanoparticles Ca(OH)_(2) and its application in enhancing electroosmosis drying of sludge

作　　者：李亚林[1] 黄羽 韩欣宏 黄文宝 孙猛 张行[1] LI Ya-lin;HUANG Yu;HAN Xin-hong;HUANG Wen-bao;SUN Meng;ZHANG Xing(College of Environment and Bioengineering,Henan University of Engineering,Zhengzhou 451191,China;School of Civil Engineering,Architecture and Environment,Hubei University of Technology,Wuhan 430068,China)

机构地区：[1]河南工程学院环境与生物工程学院,河南郑州451191 [2]湖北工业大学土木建筑与环境学院,湖北武汉430068

出　　处：《现代化工》2022年第7期166-170,共5页Modern Chemical Industry

基　　金：河南省科技攻关项目(212102310064);教育部中西部高等学校青年骨干教师国内访问学者项目(19042);教育部国家级大学生创新创业训练计划项目(202111517002);河南省高等学校青年骨干教师培养计划资助项目(2019GGJS239)。

摘　　要：为了探究纳米Ca(OH)_(2)强化污泥电渗透干化的可行性,在常温条件下采用液相沉淀法制备Ca(OH)_(2),并将制备得到的球型纳米颗粒Ca(OH)_(2)用于强化城市污泥的电渗透干化。结果表明,在分散剂的用量为8 mL、表面活性剂质量为0.2 g、搅拌时间为30 min、NaOH用量为60 mL、滴加速率为4.6~5 mL/min时,纳米Ca(OH)_(2)的纯度可达到94.02%。制得的纳米Ca(OH)_(2)为结晶度完整的球型和椭球型颗粒,并对污泥电渗透干化具有良好的强化作用,当通电电压为40 V、纳米Ca(OH)_(2)质量分数为20 mg/g DS时,电渗透干化污泥的含水率可降至57.69%。In order to explore the feasibility of nano-Ca(OH)_(2)in strengthening the electroosmotic drying of municipal sludge, Ca(OH)_(2)is prepared through liquid phase precipitation method at room temperature.The spherical nano-Ca(OH)_(2)prepared is used to strengthen the electroosmotic drying of municipal sludge.It is shown that the purity of nano-Ca(OH)_(2)can reach 94.02% when the dosage of dispersant is 8 mL,the dosage of surfactant is 0.2 g, the stirring time is 30 min, the dosage of NaOH is 60 mL,and the dropping rate is 4.6-5 mL·min^(-1).The obtained nano-Ca(OH)_(2)is spherical and ellipsoidal particles with complete crystallinity, and has a good strengthening effect on electroosmotic drying of sludge.The moisture content of sludge can be reduced to 57.69% after electroosmotic drying when the voltage is 40 V and the mass fraction of nano-Ca(OH)_(2)is 20 mg·gDS.

关 键 词：纳米颗粒 氢氧化钙 响应曲面法 电渗透 污泥脱水 

分 类 号：X705[环境科学与工程—环境工程]