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We have found that we made a mistake when we estimated the H2O2 concentration by the colorimetric method in our paper [1]. he H2O2 concentration was estimated using the colorimetric method based on the reaction of H2O2 and Ti(SO4)2 in strong acid (Ti4+ + H2O2 + 2H2O → H2TiO4 + 4 H+). The H2O2 concentration (CH2O2) is proportional to the absorption intensity at 410 nm (I410 nm), originating from the yellow-coloured H2TiO4 [2–5], (Formula Presented) where k is the proportionality. In our paper, a wrong k of 1.23 was used instead of the right one of 3.7. Therefore, the H2O2 concentration shown in figures 2, 3, 5 and 6 must be corrected. The corrected figures are presented here. Since our discussion is not concerned with the absolute concentration of the H2O2 species, this corrigendum will not change the validity of the conclusions. We apologize for this mistake and any confusion it may have caused. (Figure Presented).

Discharge plasma-liquid systems provide an interesting research field for many physical and chemical processes. These fascinating processes can be studied by using systems with liquid as anode and cathode, and the yield of aqueous hydrogen peroxide (H2O2aq) in the plasma-liquid system with the liquid anode is significantly lower than that with the liquid cathode. We improve the H2O2aq yield in the plasma-liquid system with the liquid anode by adding appropriate amount of ethanol in the liquid. A seven-time increase in the production rate is reached when the ethanol volume concentration is 5%, while further increase in the ethanol concentration will decrease the production rate. The H2O2aq production improvement is ascribed to the atomic oxygen-induced hydrogen abstraction reactions from ethanol which in situ improve the concentration of the H2O2 building brick, the OH radicals, in the liquid. However, excessive ethanol can scavenge the in situ formed OH radicals through the hydrogen abstraction reaction, by which the H2O2aq formation is inhibited.

The flotation behaviours of ilmenite, titanaugite and forsterite were investigated using microflotation experiments, zeta-potential measurements, Fourier transform infrared (FTIR) analysis, X-ray photoelectron spectroscopy analysis and artificially mixed mineral flotation experiments. The results of the microflotation experiments indicate that ilmenite exhibits good floatability when pH is greater than 4.0. Titanaugite possesses a certain floatability at pH 4.0-6.0 and pH greater than 10.0, and forsterite possesses certain floatability at pH 5.0-7.0 and pH greater than 9.0. The results of FTIR analysis and X-ray photoelectron spectroscopy analysis indicate that sodium oleate mainly interacted with Fe, resulting in ilmenite flotation, that the Ca and Mg on the titanaugite surface chemically reacted with sodium oleate, and that the Mg on the forsterite surface chemically reacted with sodium oleate under acidic conditions. However, sodium oleate mainly reacted with the Ca and Mg on the titanaugite surface, whereas sodium oleate mainly reacted with the Mg on the ilmenite and forsterite surfaces under alkaline conditions. The results of the artificially mixed mineral flotation experiment demonstrate that the TiO2 concentrate grade increases from 16.92% to 30.19% at pH 5.4, which represents the appropriate conditions for the flotation separation of ilmenite from titanaugite and forsterite under weakly acidic conditions. (Authors.), The flotation behaviours of ilmenite, titanaugite and forsterite were investigated using microflotation experiments, zeta-potential measurements, Fourier transform infrared (FTIR) analysis, X-ray photoelectron spectroscopy analysis and artificially mixed mineral flotation experiments. The results of the microflotation experiments indicate that ilmenite exhibits good floatability when pH is greater than 4.0. Titanaugite possesses a certain floatability at pH 4.0-6.0 and pH greater than 10.0, and forsterite possesses certain floatability at pH 5.0-7.0 and pH greater than 9.0. The results of FTIR analysis and X-ray photoelectron spectroscopy analysis indicate that sodium oleate mainly interacted with Fe, resulting in ilmenite flotation, that the Ca and Mg on the titanaugite surface chemically reacted with sodium oleate, and that the Mg on the forsterite surface chemically reacted with sodium oleate under acidic conditions. However, sodium oleate mainly reacted with the Ca and Mg on the titanaugite surface, whereas sodium oleate mainly reacted with the Mg on the ilmenite and forsterite surfaces under alkaline conditions. The results of the artificially mixed mineral flotation experiment demonstrate that the TiO2 concentrate grade increases from 16.92% to 30.19% at pH 5.4, which represents the appropriate conditions for the flotation separation of ilmenite from titanaugite and forsterite under weakly acidic conditions. (Authors.)