Evaluation of the tratment of metal-EDTA complexes using Ti0{sub 2} photocatalysis
- New Mexico Univ., Albuquerque, NM (United States). Center for Micro-Engineered Ceramics
- Sandia National Labs., Livermore, CA (United States)
This study has demonstrated the feasibility of TiO{sub 2} photocatalysis to treat EDTA and several metal-EDTA complexes that can be found in industrial wastewaters. For the EDTA complexes of metals capable of photodeposition, such as Cu and Pb, certain reaction conditions were shown to facilitate the simultaneous complex degradation and photodeposition of these metals onto the catalyst. With metals that do not easily photodeposit, such as Ni and Cd, it is shown that the complex degradation is still facilitated, and can enhance other metals removal processes after photocatalytic treatment. Because the treatment of these metal-EDTA complexes typically requires special measures, there may exist situations where TiO{sub 2} photocatalysis could actually be the preferred method of treatment. However, its use should be compared economically to other more established advanced oxidation technologies. This necessity is demonstrated in the economic comparison to ozone treatment for EDTA degradation alone, where ozone treatment appears to be the clear choice in this application.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Waste-Management Education and Research Consortium (WERC), Las Cruces, NM (United States); National Science Foundation, Washington, DC (United States)
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 207483
- Report Number(s):
- SAND--96-0454C; CONF-9603117--4; ON: DE96006762; CNN: HRD 93-53208
- Country of Publication:
- United States
- Language:
- English
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