A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Copper Chelation in Discharged Groundwater via EDTA Addition: a Real World Application
The Water Effects Ratio allows regulators to modify the water quality criteria of metals based on the knowledge that complexing a metal generally reduces its toxicity. Using this logic, the Alameda Corridor Transportation Authority was granted a temporary variance based on bioavailable metal concentration for groundwater discharged into the L.A.‐Long Beach Harbor in California. Chelex‐labile copper, used as a surrogate for bioavailable copper, was measured using Chelex‐100 resin combined with graphite furnace‐atomic absorption spectrophotometry (CRC‐GFAAS). Ethylendiaminetetraacetic acid (EDTA) was added on‐site to a concentration of 10–60 mg L −1 in order to reduce the bioavailable fraction to non‐detectable levels, however unexpectedly only ∼50% of the available copper was chelated. This partial complexation of the copper was due to high iron concentrations in the industrial mixture of EDTA used for the project, whereas pure EDTA was shown to fully chelate the copper. This technique may hold promise for similar short‐term projects.
Copper Chelation in Discharged Groundwater via EDTA Addition: a Real World Application
The Water Effects Ratio allows regulators to modify the water quality criteria of metals based on the knowledge that complexing a metal generally reduces its toxicity. Using this logic, the Alameda Corridor Transportation Authority was granted a temporary variance based on bioavailable metal concentration for groundwater discharged into the L.A.‐Long Beach Harbor in California. Chelex‐labile copper, used as a surrogate for bioavailable copper, was measured using Chelex‐100 resin combined with graphite furnace‐atomic absorption spectrophotometry (CRC‐GFAAS). Ethylendiaminetetraacetic acid (EDTA) was added on‐site to a concentration of 10–60 mg L −1 in order to reduce the bioavailable fraction to non‐detectable levels, however unexpectedly only ∼50% of the available copper was chelated. This partial complexation of the copper was due to high iron concentrations in the industrial mixture of EDTA used for the project, whereas pure EDTA was shown to fully chelate the copper. This technique may hold promise for similar short‐term projects.
Copper Chelation in Discharged Groundwater via EDTA Addition: a Real World Application
Hauri, J. F. (author) / Horne, A. J. (author)
Water Environment Research ; 78 ; 2508-2513
2006-12-01
6 pages
Article (Journal)
Electronic Resource
English
EDTA , bioavailability , chelex , copper
Estimation of groundwater discharged into a tunnel
| British Library Online Contents | 2006
Estimation of groundwater discharged into a tunnel
| Online Contents | 2006
Estimation of groundwater discharged into a tunnel
| British Library Conference Proceedings | 2006
Behavior of EDTA in groundwater : a study of the surface reactions of metal-EDTA complexes
| TIBKAT | 1996
The fate and migration of cyanide discharged by steel industries into groundwater
| British Library Conference Proceedings | 2008