Tags

Type your tag names separated by a space and hit enter

Studies on electrochemical treatment of wastewater contaminated with organotin compounds.
J Hazard Mater. 2007 Jul 31; 146(3):540-5.JH

Abstract

Different anode materials were tested to evaluate their suitability to eliminate organotin compounds electrochemically from shipyard process waters. The capacity of two types of anode materials was investigated: niobium coated with boron-doped diamond (BDD) and titanium coated with iridium dioxide, (Ti/IrO(2)). The aim of this work was to characterize the performance of the process using both anode materials at different current densities, and also to evaluate the generation of by-products. A further objective of this work was to evaluate if operating at low potentials with BDD anodes (to avoid the generation of elemental oxygen) the consumption of energy for degradation of pollutants could be minimized. The processes were tested on synthetic and real shipyard water containing approximately 25,000ngL(-1) of tributyltin (TBT) (as Sn) and 5,000ngL(-1) dibutyltin. The range of current densities was between 6 and 70mAcm(-2). The results showed that electrochemical treatment is suitable to eliminate organotins down to very low concentrations following a stepwise debutylation mechanism. Both anode materials exhibited a similar performance with energy consumption in the range of 7-10kWhm(-3) in order to decrease organotins down to 100ngL(-1) (as Sn). For the water composition tested, BDD did not outperform Ti/IrO(2) as initially expected, most probably because organotins were not only oxidized by OH, but also by active chlorine compounds generated by the oxidation of chloride present in the wastewater (1.6gL(-1), Cl(-)) with both anode materials. It was also found that the residual oxidants remaining in the treated effluent had to be eliminated if the water is to be discharged safely in the aquatic environment.

Authors+Show Affiliations

Hamburg University of Technology, Institute of Environmental Technology and Energy Economics, Eissendorfer Strasse 40, D-21073 Hamburg, Germany.No affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

17521806

Citation

Arevalo, Eduardo, and Wolfgang Calmano. "Studies On Electrochemical Treatment of Wastewater Contaminated With Organotin Compounds." Journal of Hazardous Materials, vol. 146, no. 3, 2007, pp. 540-5.
Arevalo E, Calmano W. Studies on electrochemical treatment of wastewater contaminated with organotin compounds. J Hazard Mater. 2007;146(3):540-5.
Arevalo, E., & Calmano, W. (2007). Studies on electrochemical treatment of wastewater contaminated with organotin compounds. Journal of Hazardous Materials, 146(3), 540-5.
Arevalo E, Calmano W. Studies On Electrochemical Treatment of Wastewater Contaminated With Organotin Compounds. J Hazard Mater. 2007 Jul 31;146(3):540-5. PubMed PMID: 17521806.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Studies on electrochemical treatment of wastewater contaminated with organotin compounds. AU - Arevalo,Eduardo, AU - Calmano,Wolfgang, Y1 - 2007/04/21/ PY - 2007/5/25/pubmed PY - 2007/9/28/medline PY - 2007/5/25/entrez SP - 540 EP - 5 JF - Journal of hazardous materials JO - J Hazard Mater VL - 146 IS - 3 N2 - Different anode materials were tested to evaluate their suitability to eliminate organotin compounds electrochemically from shipyard process waters. The capacity of two types of anode materials was investigated: niobium coated with boron-doped diamond (BDD) and titanium coated with iridium dioxide, (Ti/IrO(2)). The aim of this work was to characterize the performance of the process using both anode materials at different current densities, and also to evaluate the generation of by-products. A further objective of this work was to evaluate if operating at low potentials with BDD anodes (to avoid the generation of elemental oxygen) the consumption of energy for degradation of pollutants could be minimized. The processes were tested on synthetic and real shipyard water containing approximately 25,000ngL(-1) of tributyltin (TBT) (as Sn) and 5,000ngL(-1) dibutyltin. The range of current densities was between 6 and 70mAcm(-2). The results showed that electrochemical treatment is suitable to eliminate organotins down to very low concentrations following a stepwise debutylation mechanism. Both anode materials exhibited a similar performance with energy consumption in the range of 7-10kWhm(-3) in order to decrease organotins down to 100ngL(-1) (as Sn). For the water composition tested, BDD did not outperform Ti/IrO(2) as initially expected, most probably because organotins were not only oxidized by OH, but also by active chlorine compounds generated by the oxidation of chloride present in the wastewater (1.6gL(-1), Cl(-)) with both anode materials. It was also found that the residual oxidants remaining in the treated effluent had to be eliminated if the water is to be discharged safely in the aquatic environment. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/17521806/Studies_on_electrochemical_treatment_of_wastewater_contaminated_with_organotin_compounds_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(07)00541-9 DB - PRIME DP - Unbound Medicine ER -