Toxicological evaluation of milk from lactating dairy cows following consumption of newsprint
| Autor: | Barbara S. Shane, Michael L. Gross, Donald J. Lisk, Kevin P. Kenny, S.J. Monson, Huayi Y. Tong, Joseph G. Ebel, Caroline A. Metosh-Dickey |
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| Rok vydání: | 1993 |
| Předmět: | |
| Zdroj: | Journal of Agricultural and Food Chemistry. 41:240-245 |
| ISSN: | 1520-5118 0021-8561 |
| DOI: | 10.1021/jf00026a019 |
| Popis: | One of the uses that has been suggested for the extremely large waste stream of newspapers is for cattle bedding. Cows, however, are inclined to consume newspaper, which may contain a number of potentially toxic compounds including dioxins in the paper and benzidines in the inks used in the printing process. Conceivably, these compounds, many of which are lipophilic, could bioaccumulate in the milk of cows and thus enter the human food chain. In this study milk was collected from lactating cows before and after consuming a diet containing 10% newspaper for 2 weeks. The presence of mutagens was evaluated in the paper, diet, inks, and milk, and the concentration of dioxins was measured in the paper. Mutagens were found in newsprint, in the inks, and in two samples of milk. The concentration of the most toxic dioxin, 2,3,7,8-tetrachlorodibenzo-p-dioxin, in the paper was below the level of detection (0.5 ppt) but the concentration of hepta- and octachlorodibenzo-p-dioxin and heptachlorodibenzofurans ranged from 5.4 to 350 ppt. Although the results of this study suggest that the risk to human health from drinking milk from cows that consumed newsprint is less than that from drinking coffee or tea, caution is urged in the use of newsprint as cattle bedding material because of the variability and lack of regulation of constituents in newspaper and associated shredded waste. |
| Databáze: | OpenAIRE |
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