| Main Title |
Arsenic (III) and arsenic (V) removal from drinking water in San Ysidro, New Mexico / |
| Author |
Clifford, Dennis. ;
Lin, C. C.
|
| Other Authors |
|
| CORP Author |
Environmental Protection Agency, Cincinnati, OH. Drinking Water Research Div.;Texas Univ. Health Science Center at Houston. |
| Publisher |
[Risk Reduction Engineering Laboratory], Office of Research and Development, U.S. Environmental Protection Agency, |
| Year Published |
1991 |
| Report Number |
EPA 600/2-91/011 |
| Stock Number |
PB91-181925 |
| OCLC Number |
29232940 |
| Subjects |
Arsenic--Environmental aspects--New Mexico--San Ysidro Region ;
Fluorides--Environmental aspects--New Mexico--San Ysidro Region ;
Groundwater--Pollution--New Mexico--San Ysidro Region ;
Water--Purification--Reverse osmosis process ;
Electrodialysis
|
| Additional Subjects |
Arsenic ;
Fluorides ;
Potable water ;
Ground water ;
Chemical removal(Water treatment) ;
Water pollution ;
Laboratories ;
Mobile equipment ;
Adsorption ;
Electrodialysis ;
Ion exchanging ;
Aluminum oxide ;
Technology assessment ;
Reverse osmosis
|
| Internet Access |
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| EMBD |
EPA/600/2-91/011 |
|
NRMRL/GWERD Library/Ada,OK |
07/03/1997 |
| NTIS |
PB91-181925 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
vii, 105 pages : illustrations ; 28 cm |
| Abstract |
The removal of a natural mixture of As(III) (31 micrograms/L) and As(V) (57 micrograms/L) from a groundwater high in total dissolved solids (TDS), and also containing fluoride (2.0 mg/L), was studied in San Ysidro, NM using the University of Houston (UH)/U.S. Environmental Protection Agency (EPA) Mobile Drinking Water Treatment Research Facility. The objective of the study was to establish a cost-effective means of removing As(III), As(V), and fluoride from this and similar waters. Arsenic adsorption into fine-mesh activated alumina gave better-than-expected results. Approximately 9000 bed volumes (BV) could be treated at pH 6 before the arsenic maximum contaminant level (MCL) (0.05 mg/L) was reached. At the natural pH of 7.2, however, only 1900 BV could be treated before exceeding the MCL. Reverse Osmosis (RO) treatment resulted in >97% arsenic removal and >94% TDS removal. Electrodialysis (ED) removed 73% of the arsenic and was able to meet the arsenic MCL on the City Water containing 89 micrograms/L total arsenic; however, ED removed only 28% of the As(III) from a new well containing 100% As(III) at a level of 230 micrograms/L. Chloride-form anion exchange also performed better-than-expected (200 BV) but not well enough for it to be considered seriously for treatment. Point-of-use (POU) RO treatment was effected in removing >91% of the arsenic and >94% of the TDS at low (<15%) water recovery. |
| Notes |
"April 1991" "Cooperative agreement no. CR-807939." Cover title. "EPA/600/2-91/011" PB91-181925 Includes bibliographical references: p. 60-61. |
