【摘 要】
：
In order to develop a new method for removal of heavy metals from a dilute wastewater, the adsorption process and mechanism of zinc (Ⅱ) ions from aqueous solutions by opal e were investigated.The infl
【机 构】
：
Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, P.R.China
【出 处】
：
第五届国际湿法冶金学术会议(5th International Conference on Hydrometallurg
论文部分内容阅读
In order to develop a new method for removal of heavy metals from a dilute wastewater, the adsorption process and mechanism of zinc (Ⅱ) ions from aqueous solutions by opal e were investigated.The influences of systematic temperature, pH value, adsorbing time, particle sizes of opal, agitation speed, initial concentration of metal ion on the removal efficiency were studied, and adsorption thermodynamics kinetics and of the process were also studied.The results showed that opal is a promising mineral sorbent, the kinetic model of the adsorption process followed the first order kinetic model, and the equilibrium isotherm of zinc adsorption onto opal was consistent with Freundlich isothermal equation.
其他文献
In recent years, aqueous solutions of ammoniacal ammonium salts have been given more attention in hydrometallurgical process, being appropriate for the recovery of zinc from low-grade and complex mine
The weathered crust elution-deposited rare earth ore is a specific kind of rare earth ore in Southern China and mainly exists with the ion phase adsorbed on clay minerals,which can be leached by ion-e
Zinc electrowinning is the main process step of hydro-electrometallurgical route for both from primary and secondary sources and about 80% of the world zinc production is carried out by this technique
Acid/basic potentiometric titration can be used to quantify red mud surface charge properties.In this study, the amount of surface active-OH groups and surface charge density on red mud particles gene
The paper analysis principal of the reactive process of electrolytic anode zinc and discusses factors which affect the MnO2 deposition, including temperature, concentration of manganese ion, electric
Basedl on the principles of simultaneous equilibrium and mass balance, a series of thermodynamic equilibrium equations of Co(Ⅱ)-C2O42-NH3-NH4+-H2O system at ambient temperature are deduced theoretical
The process of reduction leaching of anodic slimes with ZnS concentrate was researched.The effect of various parameters including leaching temperature, leaching time,concentration of sulphuric acid, t
利用激光直写技术进行材料加工时，其加工分辨率一直受经典光学理论衍射极限的限制，难于进行纳米尺度的加工。飞秒激光多光子纳米加工技术利用非线性光学多光子效应与激光与物质作用阈值效应，成功地实现了纳米尺度的激光直写加工分辨率和任意三维微结构加工能力，已成为目前国际上研究热点之一。在日本科学家2001年利用多光子聚合技术首次突破衍射极限实现纳米加工后，各国对多光子聚合加工技术进行了深入研究并制备了各种微尺
偏振状态作为光源的重要属性，在光传输以及光与物质相互作用过程中都有着至关重要的影响。在广泛的应用领域里，研究人员已经对偏振状态的影响作了深入研究。然而，以前的研究主要是集中在偏振状态空间一致的条件(线性偏振，圆偏振，椭圆偏振)。近年来，偏振状态空间异性的光源(径向偏振和角向偏振)吸引了越来越多的关注。而径向偏振光束在高密度存储，高分辨率成像，生物探测，光学显微镜，激光加工以及表面等离子激元等领域都
The multi-component extraction systems have accurately described by establishing the balance state equations of the system.On the basis of the state equation of cascade-extraction system, bi-component