This powerpoint presentation begins by providing a brief overview of the Baldwin Park Operable Unit (BPOU), located in the San Gabriel Valley in southern California, and was
declared a Superfund Site in 1984
due to volatile organic compounds (VOC) contamination. Perchlorate was discovered there in 1997. Perchlorate characteristics and perchlorate treatment at BPOU are outlined. A pilot study to
evaluate the performance of four different
perchlorate-selective IX resins at three
utilities in the BPOU is presented and had the following objectives:
pilot skids using representative operational
conditions;
test new resins and those that had high
capacities in Cal Domestic pilot studies;
assess nitrosamine leaching from the new
resins; and,
test spent resins for metals leaching (TCLP
and
California WET). Testing conditions are presented for resins, pilot skid and water quality. Results are provided for:
perchlorate breakthrough;
nitrosamine leaching; and,
spent resin TCLP and California WET testing. Presentation conclusions indicate the following: the four tested tributylamine resins have a high capacity
for perchlorate removal, greater than 250,000 BVs water
treated, depending on water quality;
resin capacity at Valley County was approximately 70% of the
capacity at La Puente, based on BVs of water treated,
due to higher nitrate concentrations in the source water;
the Dow PSR2 performed best at all three plants, however the performances of the four resins were not
extremely different; resin selection for the three participating plants
may be based on economics and operation
considerations; all four resins leached NDBA and one may have
leached NDMA, but concentrations declined to
below 10 ng/L within one hour of rinsing;
the speciation of nitrosamine leaching reflects the
functional amine groups present in the resins as
observed in the previous Cal Domestic study; and,
TCLP and California WET testing indicated that
spent resin from the three utilities would not be
classified as hazardous waste. Results from this study, including a cost comparison
with regenerable ion exchange systems, reveal that
single pass ion exchange is a feasible and cost competitive
option for perchlorate treatment. Includes tables, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 1.1 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 28 |
| Published : | 11/01/2008 |
