Szakszöveg fordítása?

Sziasztok!

Gondjaim lennének angol tudományos szakszöveg lefordításával :( Bemásolom azt a szöveget, amit nem tudok lefordítani. Nagyon hálás lennék, ha valaki tudna nekem segíteni ebben.

Ez indium savas kioldása lcd/tft-ből.

Solvent extraction is a commonly used method for the purification of indium in process metallurgy particularly in zinc refineries, where indium is usually recovered from sulfate solutions [3]. Several extractant types have been used in the extraction of indium including carboxylic acids, phosphoric acid derivatives, chelating compounds like hydroxyoximes and azoles, and solvating extractants such astributyl phosphate (TBP), trioctylphosphine oxide (TOPO) and methylisobutyl ketone (MIBK). Bis(2-ethylhexyl) phosphate, usually known as di-2-ethylhexyl phosphoric acid (D2EHPA), is by far the most popular extractant and it is almost always used in practical applications since it has a high loading capacity for indium and good selectivity for indium over many other metal ions such as, for example, Zn(II), Fe(II), Cd(II), As(III) and Cu(II) [4-6]. Sato and Sato [7] researched about the extraction of indium with D2EHPA and another organophosphorus extractant, 2- ethylhexyl 2-ethylhexyl-phosphonic acid (EHEHPA), separately from H2SO4, HNO3 and HCl solutions. They found that the order of the extraction of indium was HNO3˚H2SO4˚HCl while acid concentrations are below 2 M, but in concentrated acids, the order is reversed. Sami[8] et al. studied the recovery of indium when tin is present in solution both using D2EHPA and the mixture of D2EHPA and TBP by pure ITO nano-powder, found that indium and tin could be extracted by both of them, but D2EHPA has a higher loading capacity for indium, and with two countercurrent stages (A/O=1:8) of extraction and two countercurrent stages (A/O=2:1) of stripping, almost complete indium is recovered from the leaching solution and high In/Sn selectivity in stripping could be achieved.

Although there are several articles on the solvent extraction of indium using D2EHPA, few of them applied it to scrap LCDs but to ITO. The purpose of the present study was to explore the most appropriate experimental conditions for the acidic leaching of scrap LCDs and then to use solvent extraction with D2EHPA as extractants to extract indium from its acidic solutions and HCl as stripping agent to extract indium from the organic solutions, considering the effect of concomitant ions in leaching solutions.

In these acid systems, dissolution concentrations of zinc, titanium, copper, tin and chromium were relatively low, and the dissolution ratios changed significantly. Dissolution concentrations of aluminum and strontium in concentrated HCl systems were quitely higher than in single concentrated HNO3 and H2SO4(1:1) systems. In the TFT-LCD panel, arsenic exists in the form of highly toxic material As2O3, in order to control its concentration in the effluent, there should choose the acid system in which arsenic has low dissolution concentration as far as possible while the target element has high dissolution concentration. The dissolution concentration of iron and indium changed slightly in different acid systems, so iron is the concomitant ion at indium’s leaching solution. Comprehensively considering the above

reasons, this study chose H2SO4(1:1) as the acid system to leach indium, and took measures to eliminate the effects of iron.

Az is elég lenne, ha csak nagy vonalakban tudná valaki leírni nekem a dolgokat a többit meg majd valahogyan lefordítom, csak a lényegét szeretném megérteni.

Köszönöm szépen a segítséget!