锰矿石脱硫产物处理含铜废水动态实验研究

Dynamic Experimental Study on Removal of Copper from Aqueous Solutions by Desulfurization Products of Manganese Ore

氧化型锰矿石脱硫产物含大量硫化锰,利用这种材料装填固定床进行净化水中铜离子的动态试验。在材料粒径0.45～0.9mm、进水pH=5.8、进水滤速4.58m/h条件下,1t锰矿石脱硫产物可以处理923tρ(Cu2+)=50mg/L的含铜废水,出水ρ(Cu2+)<0.5mg/L,低于国家一级排放标准。控制进水pH在4～9之间、降低进水滤速、采用较小粒径的材料有利于提高锰矿石脱硫产物处理含铜废水的容量。利用X射线粉末衍射(XRD)和扫描电镜-能谱分析(SEM-EDS)对材料和产物进行表征,证明锰矿石脱硫产物去除水中铜离子是基于离子交换反应的原理。

Desulfurization products of manganese ore containing abundant manganese sulfide were used to fill fixed bed for dynamic experiment of removing copper from aqueous solution. Under the conditions that particle diameter was 0. 45 -0. 9nun, pH of influent was 5.8 and filtration rate was 4. 58 m/h, It of desulfurization products of manganese ore could treat 923 t wastewater containing 50 mg/L copper ions. The Cu2 ＋ concentration in effluent was lower than the national discharge standard Ⅰ （0. 5 mg/L）. The capacity of copper removing with desulfurization products of manganese ore could be increased if the pH of intluent water was controlled in the range of 4 - 9, and filtration rate and particle diameter of fillers were reduced. X-ray diffraction （XRD） and scanning electron microscopy with energydispersive spectrometry （SEM-EDS） were used for the determination of materials and products. The copper vemoval from aqueous solutions by desulfurization products of manganese ore was based on the principle of ion exchange reactions.