Sentence examples for ppm of initial from inspiring English sources

Cu nZVI/TiO2 proved to have higher activity in nitrogen reduction performance than that without TiO2 and nitrate can be completely degraded in both of solution pH of 4 and 7 in 75 ppm of initial nitrate concentration.

The alkyl C region (0-45 ppm) of initial NMR spectra was characterized by two signals at 26 and 35 ppm, assigned to CH2 groups in methylenic chain and in α/β position, respectively, to the carbonyl of ester bonds in short chain polyester derivatives, which may be combined with starch in the thermoplastic bio-film products (Fig. 3).

Finally, crude canola oil was tested to verify the potentialities of the suggested process towards oils rich in NHPs; the canola oil used here contained approximately 130 ppm of P in NHPs over the total 250 ppm of initial P content.

The phenol mineralization reached in anaerobic conditions was 95% (1.5 ppm) of the initial concentration (30 ppm) and it is maintained constant after 6 h of radiation while in aerobic conditions the TOC reaches only 55% (13.5 ppm).

In all the systems investigated, maximum extent of degradation (94.6%) was observed for 10 ppm of p-nitrophenol initial concentration (w/v) using combination of sonophotocatalysis and optimum quantity of H2O2.

The results for the UV/S2O8 2− in constant concentration of MDEA of 500 ppm, initial peroxydisulfate concentration of 15 mM, irradiation of 250 W and pH = 8.5 are shown in Fig. 8.

It is clear from the table that about 80%% of 7.5 ppm initial concentration of endosulfan disappeared within 1 h of the reaction time at FeSO4 dose of 50 mg ml−1 and H2O2 dose of 236 mg ml−1 at initial pH 2. When H2O2 dose was reduced to 177 mg ml−1, endosulfan degradation decreased to about 58%%.

Presence of H+ ions in the reaction mixture (50 μl ml−1 of glacial acetic acid) accelerated the degradation efficiency of 30 ppm initial concentration of endosulfan (96% removal) and lindane (98% removal) at Mg0/ZnCl2 dose of 5/1 mg ml−1 within 30 min of reaction.

In fabrics with BMNP, ratio of Ag Cu is equal within 0.015 0.13 wt% (15 70 ppm) depending on the concentration of initial impregnating solutions.

N d and N o were calculated using the general equations: where H inj and O inj represent the respective DLW dose (H or O, mol), H d and O d represent the isotope concentrations (H or O, ppm) in the DLW dose, and H b, H i, O b and O i represent the isotope concentrations (H or O, ppm) of the background and initial samples, respectively.

Complete degradation of methylene blue of initial concentration of 200 ppm with the catalyst loading of 1 kg/m3 of combustion synthesized TiO2 occurred in 65 min, while Degussa P-25 showed reduction in concentration up to 100 ppm under identical conditions.