Determination of Trace Perchlorate in High-Salinity Water Samples by Ion Chromatography with On-Line Preconcentration and Preelution

2003 ◽  
Vol 75 (3) ◽  
pp. 701-706 ◽  
Author(s):  
Kang Tian ◽  
Purnendu K. Dasgupta ◽  
Todd A. Anderson
Keyword(s):  
Ion Chromatography ◽  
Water Samples ◽  
High Salinity ◽  
High Salinity Water ◽  
On Line ◽  
Salinity Water

Purge-and-trap ion chromatography for the determination of trace ammonium ion in high-salinity water samples

2008 ◽  
Vol 1188 (2) ◽  
pp. 69-74 ◽  
Author(s):  
Po-Yen Wang ◽  
Jing-Yi Wu ◽  
Hung-Jhen Chen ◽  
Tzung-Yi Lin ◽  
Chien-Hou Wu
Keyword(s):  
Ion Chromatography ◽  
Water Samples ◽  
High Salinity ◽  
Ammonium Ion ◽  
Purge And Trap ◽  
High Salinity Water ◽  
Salinity Water

Measurements of assimilable organic carbon (AOC) in high saline conditions using P17

2013 ◽  
Vol 13 (2) ◽  
pp. 265-272
Author(s):  
Eunjeong Mun ◽  
Sangyoup Lee ◽  
Inhyuk Kim ◽  
Boksoon Kwon ◽  
Heedueng Park ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Water Samples ◽  
High Salinity ◽  
Saline Water ◽  
Assay Method ◽  
Acetate Concentration ◽  
Cell Production ◽  
High Salinity Water ◽  
Assimilable Organic Carbon ◽  
Salinity Water

Biofouling caused by the deposition or growth of microorganisms on the membrane surface is one of the major concerns in nanofiltration (NF) and reverse osmosis (RO) processes. Assimilable organic carbon (AOC) has been a useful index to assess the growth potential of bacteria. In the case of drinking water, the AOC assay method has been widely applied to estimate growth or regrowth potential of bacteria in distribution and storage systems. However, studies on AOC measurement for high salinity water samples such as brackish water and seawater are rather scarce. The objective of this research is to investigate the influence of water salinity on the conventional AOC assay method. AOC samples with different salt concentrations were prepared by varying NaCl concentration from 0 to 35,000 mg/L, while the acetate concentration was held at 100 μg/L. The number of cells produced in water samples was measured by the heterotrophic plate count (HPC) method using R2A agar. The result showed that the cell production of Pseudomonas fluorescens strain P17 and Spirillum strain NOX decreased with increasing salinity. Especially, the growth of Spirillum strain NOX was noticeably influenced by water salinity. To further observe the relation between acetate concentration and cell production in high salinity water, organic-free saline water samples were prepared by spiking NaCl in deionized (DI) water. The organic-free saline water samples were enriched with acetate of which concentration was varied to be 0–1,000 μg/L (as acetate). Also, P. fluorescens strain P17 was adjusted to high total dissolved solids (TDS) condition prior to being injected into the saline water samples. The result demonstrated that the amount of microorganisms increased with increasing acetate concentration. Although AOC measurement of saline water using Spirillum strain NOX seemed unacceptable, it was suggested that P. fluorescens strain P17 has the possibility to be used in measuring AOC in saline water. Moreover, the yield factor was altered as a result of reflecting salinity impact as the growth number of P. fluorescens strain P17 was unstable with high saline condition.

scholarly journals Synthesis of a novel porous Ag2O nanomaterial on ion exchange resin and its application for COD determination of high salinity water

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Trung Thanh Nguyen ◽  
Quynh Anh Nguyen Thi ◽  
Ngoc Hang Le ◽  
Nhat Huy Nguyen
Keyword(s):  
Ion Exchange ◽  
Exchange Resin ◽  
High Salinity ◽  
Salt Content ◽  
Ion Exchange Resin ◽  
High Salinity Water ◽  
Resin Core ◽  
Salinity Water ◽  
Chloride Removal

AbstractThis study reports for the first time on the synthesis of novel resin@P-Ag2O material and its application for reducing the chloride effect on COD determination of high salinity water. This engineered core–shell nanomaterial with cationic ion exchange resin core and porous Ag2O shell was prepared by facile ion exchange and silver oxidation method at ambient temperature without using toxic chemicals. The material was characterized by FTIR, XRD, SEM, and SEM–EDX mapping. In the chloride removal test, this material gave a high adsorption capacity of ca. 244 mgCl/gAg at the mild condition with high durability after several adsorption–desorption cycles. Moreover, resin@P-Ag2O was applied for removing chloride in water to improve the accuracy of the SMEWW 5220C:2012 method for COD determination of high salinity water. The result showed that the COD of a water sample with salt content after being treated by the material had a low error (≤ 10%) as compared to the sample without salt. Meanwhile, the COD of salty water measured by the dilution method had an error of around 15%. These results indicate that resin@P-Ag2O material has a very potential application for chloride removal and COD determination of high salinity water.

Sign in / Sign up

Export Citation Format

Share Document