盐酸酸洗废液制备α-纳米Fe_(2)O_(3)的工艺优化  

Optimization for preparation of α-Fe_(2)O_(3) nanoparticles from spent HCl-picking liquor

作　　者：张震斌[1] 陈玥琪 陈杰 商井远 ZHANG Zhenbin;CHEN Yueqi;CHEN Jie;SHANG Jingyuan(School of Chemical and Environmental Engineering,Liaoning University of Technology,Jinzhou 121001,China;Tianda Environmental Institute,Qinhuangdao 066004,China;Huludao Ecological Environment Protection Service Center,Huludao 125000,China)

机构地区：[1]辽宁工业大学化学与环境工程学院,辽宁锦州121001 [2]秦皇岛天大环保研究院,河北秦皇岛066004 [3]葫芦岛市生态环境保护服务中心,辽宁葫芦岛125000

出　　处：《电镀与涂饰》2021年第3期229-234,共6页Electroplating & Finishing

基　　金：辽宁省教育厅科学研究经费项目(JFL202015403);辽宁省教育厅科学研究经费项目青年科技人才“育苗”项目(JFL202015403)。

摘　　要：以氧化铁皮作为除酸剂,与盐酸酸洗废液反应制得FeCl_(2)溶液,再采用空气-双氧水双重氧化和沉淀法从中制得α-Fe_(2)O_(3)纳米颗粒。分析了FeCl_(2)质量浓度、氨水质量浓度、超声时间和煅烧温度对产物的的粒径和纯度的影响。采用场发射扫描电子显微镜(SEM)和X射线衍射仪(XRD)对产物的形貌和结构进行了表征。优化实验结果表明,FeCl_(2)质量浓度为16 g/L,氨水质量浓度为7.5 g/L,超声时间为50 min,煅烧温度为750℃时,制得了分散性虽然一般,但纯度较高的α-Fe_(2)O_(3),其含量高达95.3%,平均晶粒尺寸约为38.2 nm。这为盐酸酸洗废液的资源化利用提供了实验基础。Ferrous chloride(FeCl_(2))solution was obtained from spent hydrochloric acid pickling liquor with iron oxide scales as acid removal agent,and then used to prepareα-iron oxide(α-Fe_2O_3)nanoparticles by air-hydrogen peroxide dual oxidation and precipitation.The effects of mass concentrations of FeCl_(2) and ammonia water,ultrasonic agitation time,and calcination temperature on the particle size and purity ofα-Fe_2O_3 were analyzed.The morphology and phase constitution ofα-Fe_2O_3 particles were characterized by field-emission scanning electron microscopy(SEM)and X-ray diffractometry(XRD).The result of optimization experiment showed thatα-Fe_2O_3 particles with an average size of 38.2 nm and a purity as high as 95.3%but ordinary dispersibility could be obtained under the following conditions:FeCl218 g/L,ammonia water 5 g/L,ultrasonic agitation time 50 min,and calcination temperature 7500 C.This study provides some experimental basis for the utilization of spent hydrochloric acid pickling liquor.

关 键 词：盐酸酸洗 废液 氧化铁 氧化 沉淀 

分 类 号：X757[环境科学与工程—环境工程]