摘要
在环境温度下,水中Cu^2+与铁硫化物矿物交换反应形成的铜蓝的结晶度可以影响Cu^2+的回收效率及交换反应的完全程度。本文利用Cu Cl2和Na2S直接反应生成铜蓝,讨论了不同p H值、反应时间、反应温度、反应物浓度、反应物滴加速度、外加电解质浓度等条件对铜蓝晶体生长的影响,并采用XRD、TEM和EDX方法对铜蓝结晶度和形貌进行了表征,用Scherrer公式计算了晶体的平均粒径。结果表明,反应p H值越低,时间越长,温度越高,反应物滴加速度越慢,越有利于铜蓝晶体生长;铜蓝晶体结晶度随着反应物浓度的增加呈先增后减的趋势,而在不同外加电解质浓度条件下表现出不同的结晶度。
The crystallinity of covellite formed by the exchange reaction of Cu^2+ and iron-sulfide minerals in water at ambient temperature affects the recovery efficiency of Cu^2+ and the complete degree of the exchange reaction.In this study,covellite was synthesized via direct reaction of Cu Cl2and Na2S.The growth of covellite crystal under different conditions,including different p H values,reaction time,reaction temperatures,reactant concentrations,reactant dropping rate,and extra-added electrolyte concentrations,were discussed.The crystallinity and morphology of covellite were characterized by XRD,TEM and EDX.The average particle size of the crystal was calculated by Scherrer formula.The results showed that the lower p H values,longer reaction time,higher reaction temperature and lower reactant dropping rate had favorable effects on the growth of covellite crystals.The crystallinity of covellite increased first and then decreased with the increasing of reactant concentration,and varied with the different concentrations of extra-added ions.
作者
张玉珠
彭书传
陈天虎
刘海波
陈冬
马文婕
ZHANG Yu-zhu;PENG Shu-chuan;CHEN Tian-hu;LIU Hai-bo;CHEN Dong;MA Wen-jie(Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes,School of Resource and Environmental Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2020年第1期113-119,共7页
Acta Petrologica et Mineralogica
基金
国家自然科学基金资助项目(41772035)。
关键词
铜蓝
晶体生长
废水处理
重金属
covellite
crystal growth
wastewater treatment
heavy metals
