The fate of haloacetic acids and trihalomethanes in an aquifer storage and recovery program, Las Vegas, Nevada
Ground Water
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Abstract
The fate of disinfection byproducts during aquifer storage and recovery (ASR) is evaluated for aquifers in Southern Nevada. Rapid declines of haloacetic acid (HAA) concentrations during ASR, with associated little change in Cl concentration, indicate that HAAs decline primarily by in situ microbial oxidation. Dilution is only a minor contributor to HAA concentration declines during ASR. Trihalomethane (THM) concentrations generally increased during storage of artificial recharge (AR) water and then declined during recovery. The decline of THM concentrations during recovery was primarily from dilution of current season AR water with residual AR water remaining in the aquifer from previous ASR seasons and native ground water. In more recent ASR seasons, for wells with the longest history of ASR, brominated THMs declined during storage and recovery by processes in addition to dilution. These conclusions about THMs are indicated by THM/Cl values and supported by a comparison of measured and model predicted THM concentrations. Geochemical mixing models were constructed using major-ion chemistry of the three end-member waters to calculate predicted THM concentrations. The decline in brominated THM concentrations in addition to that from dilution may result from biotransformation processes.
Suggested Citation
Thomas, J.M., McKay, W., Colec, E., Landmeyer, J., and Bradley, P., 2000, The fate of haloacetic acids and trihalomethanes in an aquifer storage and recovery program, Las Vegas, Nevada: Ground Water, v. 38, no. 4, p. 605-614, https://doi.org/10.1111/j.1745-6584.2000.tb00252.x.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The fate of haloacetic acids and trihalomethanes in an aquifer storage and recovery program, Las Vegas, Nevada |
| Series title | Ground Water |
| DOI | 10.1111/j.1745-6584.2000.tb00252.x |
| Volume | 38 |
| Issue | 4 |
| Publication Date | August 04, 2005 |
| Year Published | 2000 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | Toxic Substances Hydrology Program |
| Description | 10 p. |
| First page | 605 |
| Last page | 614 |
| Country | United States |
| State | Nevada |
| City | Las Vegas |