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Polynuclear Aromatic Hydrocarbons Removal

Introduction -  There are many groundwater remediation projects throughout the country that have contamination from polynuclear aromatic hydrocarbons (PAH’s). Tests have shown that PAH’s can be removed efficiently through filtering with X-TEX.  Laboratory generated samples containing varied amounts of PAH compounds, plus actual samples from a pentachlorophenol-contaminated site, were tested using Xextex media with dramatic results.

Method -  Sound Analytical Services created spiked blanks containing low-levels of PAH’s. Twenty grams of X-TEX.   were placed into a filter device and one of the samples was poured through the filter. Both samples were then analyzed for PAH compounds using USEPA method 8270.

Results -  The results from the PAH tests are tabulated below (Table 1). X-TEX.   removes more then 95 % of the carcinogenic PAH’s.

Table 1 - PAH /Removal From Water

Analyte

Unfiltered (ppb)

Filtered (ppb)

% Removal

Benzo(a)anthracene

16

0.18

98.9

Chrysene

16

0.14

99.1

Benzo(b)fluoranthene

16

0.32

98.0

Benzo(k)fluoranthene

16.5

0.28

98.3

Benzo(a)pyrene

21

0.36

98.2

Indeno(1,2,3-cd)pyrene

20

0.54

97.3

Dibenz(a,h)anthracene

21.5

0.3

98.6

Benzo(g,h,i)perylene

18.5

0.38

98.0

Conclusions-  X-TEX provides an effective means of removing contaminants from groundwater and industrial effluent, with efficiencies greater than 95%.  X-TEX works efficiently for low-level samples, and has the capacity to treat high-level samples.

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