Main Title |
Arsenic (3) and arsenic (5) removal from drinking water in San Ysidro, New Mexico microfiche / |
Author |
Clifford, D. ;
Lin, C. C.
|
CORP Author |
Environmental Protection Agency, Cincinnati, OH. Drinking Water Research Div.;Texas Univ. Health Science Center at Houston. |
Publisher |
US Environmental Protection Agency, Risk Reduction Engineering Laboratory |
Year Published |
1991 |
Report Number |
EPA/600/2-91/011 |
Stock Number |
PB91-181925 |
Subjects |
Arsenic
|
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
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB91-181925 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
119 p. in various pagings ; 29 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 |
EPA 600/2-91/011". |
Place Published |
Cincinnati, OH.,: |
Supplementary Notes |
Sponsored by Texas Univ. Health Science Center at Houston. |
PUB Date Free Form |
1991. |
Ti Tra Differently |
Arsenic 3. Arsenic 5. |
NTIS Prices |
PC A06/MF A01 |
BIB Level |
m |
Cataloging Source |
OCLC/T |
OCLC Time Stamp |
20010110133132 |
Language |
eng |
Origin |
NTIS |
Type |
MERGE |
OCLC Rec Leader |
00712nam 2200217Ka 45020 |