Separation of nickel(II) and cadmium(II) ions from sulphate solution with use of supported liquid membranes (SLM) has been studied. Di(2-ethylhexyl)phosphoric acid (D2EHPA) dissolved in kerosene ...
Jun 15, 2006· Nickel–cadmium batteries represent the kind of secondary batteries that are used in many portable electronic devices, military and defense applications. Nickel is a useful metal whereas cadmium is toxic and poisoning occurs through inhalation and ingestion. ... A complete hydrometallurgical process for the separation and recovery of cadmium ...
Apr 09, 2012· Separation of nickel(II) and cadmium(II) ions from sulphate solution has been studied. The solutions of Ni(II) and Cd(II) have been treated with different exchange resins: Lewatit OC-1026, Lewatit TP-207, and Lewatit MonoPlus SP 112. Data obtained from the ion-exchange process was compared with data from the supported liquid membrane experiment.
The results of liquid-liquid extraction process led to removal of 91% of nickel ions and 32% of cadmium from mixed Ni-Cd aqueous feed phase with carrier concentration of 250 mM, feed phase pH of 4, mixing time of 5 minutes and 1.5 M of sodium sulphate as inert salt. In stripping phase, both nickel and cadmium were highly stripped while ...
Studies are conducted on the leaching and solvent extraction separation of metals from chloride leach liquor of spent nickel-cadmium batteries with Cyanex 923 and 272 diluted in kerosene as the extractants. Dissolution of the metals increases with increase in acid concentration and time but decreases with the solids-to-liquid ratio. Complete dissolution of Cd, Co and Ni can be achieved with 1 ...
(1997). Process Development for the Removal of Zinc and Cadmium from Wastewater Using Slag—A Blast Furnace Waste Material. Separation Science …
During the EC process under these conditions, we have studied the separation of some heavy metal ions such as iron (Fe), nickel (Ni), copper (Cu), zinc (Zn), lead (Pb) and cadmium (Cd) with different initial concentrations in the range of 50-600mg/L and initial pH between 7.5 and 7.8.
3, the technique process could be divided into 3 stages. In the 1st, the copper in feed solution could be extracted totally by controlling the pH at about 2.0, while other ions were hardly extracted. In the 2nd, nickel is extracted at a pH of about 5.0, and finally zinc and cadmium at a pH of about 6.5.
Sep 30, 2019· Abstract— Adsorption and desorption reactions at the solid phase–solution interface, play a significant role in controlling metal concentrations in soil solution and metal translocation to plants. Five predominant benchmarks soils of Pakistan were characterized for their lead (Pb), cadmium (Cd), and nickel (Ni) adsorption parameters by constructing equilibrium adsorption isotherms. The ...
What is claimed is 1. A process of separating cadmium and nickel from an aqueous solution of mineral acid salts from the group consisting of salts of HCl, HBr, HNO 3 and H 2 SO 4 containing 10 - 100g/l of nickel and a maximum total of 200 g/l of nickel and cadmium comprising adding 8-4 moles per liter of ammonia, depending on the nickel content of the solution, precipitating the cadmium by ...
Nov 02, 2009· The environment is seriously polluted due to improper and inefficient recycling of waste nickel−cadmium (Ni−Cd) batteries in China. The aim of this work is aimed to seek an environmentally friendly recycling process for resolving the negative impacts on environmental and human health resulting from waste Ni−Cd batteries. This work investigates the fundamentals of waste Ni−Cd …
Sep 23, 2006· (1992). Separation and Recovery of Nickel and Cadmium from Spent Cd—Ni Storage Batteries and Their Process Wastes. Separation Science and Technology: Vol. 27, No. 2, pp. 213-221.
The environment is seriously polluted due to improper and inefficient recycling of waste nickel-cadmium (Ni-Cd) batteries in China. The aim of this work is aimed to seek an environmentally friendly recycling process for resolving the negative impacts on environmental and …
A process for the selective recovery of cadmium, molybdenum, zinc, nickel and other metal values from wet process phosphoric acid and other acidic to slightly basic carrier solutions, wherein the metal-bearing solution is contacted with an organophosphene extractant to precipitate the metal values for subsequent separation from the solution.
A new solvent‐extraction process for the separation of cadmium, cobalt, and nickel in sulphate solutions coming from the hydrometallurgical processing of spent Ni‐Cd batteries is proposed. The main innovation is to use nickel salts of the extractants, thus avoiding external pH control in the extraction operation. The extractants are first loaded with nickel in conditioning steps, using a ...
Sep 20, 2017· The main composition of the positive electrode and negative electrode are Ni (304,000 mg/kg) and Cd (531,000 mg/kg), respectively. The other components are mainly composed of Fe. In this study, a thermal separation process (TSP) was used to recover valuable metals from spent Ni-Cd batteries with limestone and cullet additives.
Jan 26, 2010· Experiments were conducted to investigate the separation of cadmium(II) from spent nickel/cadmium battery by emulsion liquid membrane. Liquid membrane mainly consisted of a diluent (kerosene), a surfactant (Span 80), a carrier (di(2‐ethylhexyl) phosphoric acid, D2EHPA) and an internal phase (sulfuric acid).
Sep 28, 2020· The extraction of cadmium from sulfuric acid solutions and its separation from nickel with salts of bis(2,4,4-trimethylpentyl)dithiophosphinic acid (Cyanex 301) and amines was studied. The data obtained show that extractants based on Cyanex 301 and Quaternary ammonium bases are most suitable for this since it is possible to extract cadmium in the form of sulfates and bisulfates as well as ...
Experimental procedure separation of zinc and manganese in sulfate media [20]. Although Cyanex 302 offers good separation of cadmium and Stock solution of nickel (II) and cadmium (II) with a concen- nickel, it is relatively expensive to be used commercially.
to the cadmium containing NiCd batteries. Since their market launch in 1991, up to 1500 tonnes in 2003 have been sold in Germany [1]. The main parts of a NiMH battery are cathode, anode, electrolyte, separator and the steel case. The cathode is made of nickel coated with nickel hydroxide whereas the anode consists of a hydrogen storage alloy ...
Thus, an outlet for nickel and its simultaneous complete separation from cadmium cannot be obtained in a single Zn-powder precipitation. Therefore, process 1 cannot be considered satisfactory if, in addition to Co, Ni is present in the ZnSo 4 solution. On the contrary, process 2 offers a possibility of mutual outlet for the two substances.
US3258307A US281653A US28165363A US3258307A US 3258307 A US3258307 A US 3258307A US 281653 A US281653 A US 281653A US 28165363 A US28165363 A US 28165363A US 3258307 A US3258307 A US 3258307A Authority US United States Prior art keywords cadmium zinc ions liquid phase Prior art date 1963-05-20 Legal status (The legal status is an assumption and is not a legal …
Jul 01, 1994· @article{osti_10168385, title = {Process for removing and detoxifying cadmium from scrap metal including mixed waste}, author = {Kronberg, J W}, abstractNote = {Cadmium-bearing scrap from nuclear applications, such as neutron shielding and reactor control and safety rods, must usually be handled as mixed waste since it is radioactive and the cadmium in it is both leachable and highly toxic.
Separation of nickel(II) and cadmium(II) ions from sulphate solution has been studied. The solutions of Ni(II) and Cd(II) have been treated with different exchange resins: Lewatit OC-1026, Lewatit ...
Feb 01, 1992· Several typical methods for the recovery and separation of cadmium and nickel from Ni- and Cd-bearing wastes are briefly described. Laboratory- and large-scale experiments were respectively developed to improve the processes for the recovery and treatment of cadmium and nickel. A …
Ataollah Babakhani, Fereshteh Rashchi, Alireza Zakeri, Ehsan Vahidi, Selective separation of nickel and cadmium from sulfate solutions of spent nickel–cadmium batteries using mixtures of D2EHPA and Cyanex 302, Journal of Power Sources, 10.1016/j.jpowsour.2013.08.063, 247, (127-133), (2014).
Nickel extraction was very low and equal to about 1%. The removal efficiencies of lead and cadmium were increased with time. Comparing to lead and cadmium the nickel removal efficiency was insignificant with time. From Figure 1(e) it is obvious that 15 min of mixing and 0.1 mol/L AA concentration are enough for complete lead extraction.
metal ions change for the worse selectivity of separation process. Especially zinc(II) and cadmium(II) ions decreased five-fold selectivity of ion separation process. keywords: zinc(II), cobalt(II), nickel(II) cadmium(II); polymer inclusion membranes; solvent extraction; 1-decylimidazole 1. INTRODUCTION Cobalt, nickel, zinc and cadmium are ...