Abstract：
:The potential presence of pharmaceuticals, hormones and personal care products in drinking water supplies has raised concerned over the efficiency with which these substances are removed by water treatment processes. In this work, we analyzed samples of raw, unprocessed water collected in different periods and found them to contain higher levels of these contaminants in the colder periods (viz. 12-314 ng L(-1) in autumn and winter as compared to 8-127 ng L(-1) in spring and summer) as a result of their biodegradation being favoured by high temperatures and solar irradiance. We also assessed the efficiency with which these contaminants are removed from drinking water by a water treatment plant operating in south-eastern Spain. Preoxidation with potassium permanganate and chloramination with sodium hypochlorite in the presence of highly concentrated ammonia were found to be the treatment steps most markedly contributing to the removal of pharmaceuticals, hormones and personal care products from drinking water (especially in the warmer periods, where these contaminants were completely removed from the water). By contrast, water treated in the colder periods (autumn and winter) still contained small amounts of ibuprofen and carbamazepine (0.09-0.5 ng L(-1)) which, however, accounted for less than 0.2% of their original concentrations in the water prior to treatment.
journal_name
Chemospherejournal_title
Chemosphereauthors
Azzouz A,Ballesteros Edoi
10.1016/j.chemosphere.2013.07.037subject
Has Abstractpub_date
2013-11-01 00:00:00pages
2046-54issue
9eissn
0045-6535issn
1879-1298pii
S0045-6535(13)01021-7journal_volume
93pub_type
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