Full size image The onset of substantial glacial retreat on Svalbard near the start of the twentieth century15 enabled gaps to form in the cryospheric cap between the retreating glacier margin and the encroaching permafrost boundary. These discontinuities provide outlets for pressurized groundwater system...
(Conditions of the feed solution for all membrane tests: [Ranitidine] or [Other pollutants] = 10 ppm, [PMS] = 20 ppm, pH = 4.0, Pressure = 1 bar, T = 298 K). Error bars represent standard deviation of three measurements on the same membrane. Full size image Coupling Co@...
According to the results, the PO43− and HPO42− concentrations gradually increased during the first 36 h, and tended to stabilize at approximately 48 h (at values of approximately 11 ppm and 24 ppm, respectively), indicating that the 10% P/MoS2 catalyst was very stable ...
If the system was cleaned by using deionized water only and the system is full of deionized water, complete the following steps: Add one of the following biocides: 100 parts per million (ppm) of Nalco H-550 (glutaraldehyde) 200 ppm of Nalco 73500 (glutaraldehyde) ...
The physicochemical water quality parameters of mine water, including pH, electrical conductivity (EC), total dissolved solids (TDS), dissolved oxygen (DO), and salinity, was 6.4–7.6, 100–600 s/cm, 25–369 ppm, 9.0–12.10 ppm, and 0.02–0.29 ppt, respectively. When six metals (Pb, Cr...
(approximately 0.1 ppm), (b) contemporary water system construction materials do not leach heavy metal contaminants, and (c) test results for this attribute have uniformly been negative—there has not been a confirmed occurrence of a singular test failure (failure of only the Heavy metals test ...
b, The groundwater model represents Tertiary igneous intrusive (Tmi); Permian, Cretaceous and Tertiary sandstones (PPm, Kd and Tw, respectively); Cretaceous mudstone (Kmv); Cretaceous shale (Km) and Quaternary alluvium (Qa). A description of the geologic units is provided in Supplementary Table ...
the initial water content on the surface (~200 nm) of lunar minerals was 1205–7845 ppm. Previous studies have suggested that ~20–50% of solar wind protons can be bonded with oxygen to form OH/H2O49. Based on this, we calculated the surface density of hydrogen (ρH) from the follo...
of water vapor is constant below 10 km. the a priori value of c w is 1.43 mg/cm 2 for a water vapor vmr of 300 ppm. figure 4 shows transmittance spectra simulated at a solar zenith angle (sza) of 80° while changing the water vapor vmr as 100, 300, and 500 ppm. fig. 4 ...
Full size image [Math Processing Error]GR-I(for anion)=Cl−Cl−+HCO3− (7) [Math Processing Error]GR-II(for cation)=Na++K+Na++K++Ca2+ (8) where all ions are represented as meq/L. Gibbs ratios for the all samples are plotted against TDS (ppm) in Fig. 6 to know whether...