硫铁矿废水资源化制备纳米铁黑颜料  

Preparation of Nanometer Black Iron Oxide Pigments by Recovery of Iron from Pyrite Wastewater

作　　者：何卓[1] 郑夏琼[1] 李雁[1] 林春绵[1] 

机构地区：[1]浙江工业大学生物与环境工程学院,浙江杭州310014

出　　处：《环境科学与技术》2011年第10期160-163,167,共5页Environmental Science & Technology

基　　金：浙江省科技计划项目(2009C33068)

摘　　要：硫铁矿废水预处理除铝后作为二价铁源,添加一定量的氯化高铁作为三价铁源,以化学共沉淀法制备纳米铁黑颜料。通过考察nFe3＋/nFe2（＋1.8~2.1）、反应温度（30~70℃）、反应溶液初始pH值（7.5~12.5）和反应时间（0~60 min）,探索了资源化利用硫铁矿废水制备纳米铁黑颜料的较优工艺条件。结果表明：在nFe3＋/nFe2＋为1.9、反应温度为50℃、反应溶液初始pH值为8.5、反应时间为30 min的条件下,能制备得到较高品质的纳米铁黑颜料。经XRD、SEM及铁黑颜料技术指标检测分析,该铁黑颜料粒径在17 nm左右,Fe3O4含量在90%以上,各项指标均能达到氧化铁黑颜料行业标准中二级品的要求。Pyrite wastewater which is pretreated to remove aluminum is utilized as ferrous source and a certain amount of FeCl3.6H2O is added to it as ferric source to prepare nanometer black iron pigment by co-precipitation method.nFe3＋/nF2＋ 1.8~2.1,reaction temperature 30~70 ℃,initial pH of reaction solution 7.5~12.5 and reaction time 0~60 min were investigated to explore the superior process conditions for the recovery of iron from pyrite wastewater to prepare nanometer black iron pigment.Results showed that nanometer black iron oxide pigments with satisfactory quality can be prepared under the conditions of nFe3＋/nF2＋ 1.9,reaction temperature 50 ℃,initial pH of reaction solution 8.5 and reaction time 30 min.XRD,SEM and black iron oxide pigments qualification analysis showed that the particle size of prepared black iron pigment was about 17 nm,and Fe3O4 content was higher than 90%,which can satisfy Grade II in the standard of black iron pigment industry.

关 键 词：硫铁矿废水 铁黑颜料 化学共沉淀 纳米级 

分 类 号：X751[环境科学与工程—环境工程]