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Anaerobic degradation of benzene in diverse anoxic environments


, : Anaerobic degradation of benzene in diverse anoxic environments. Environmental Science & Technology 31(3): 813-818

Benzene has often been observed to be resistant to microbial degradation under anoxic conditions. A number of recent studies, however, have demonstrated that anaerobic benzene utilization can occur. This study extends the previous reports of anaerobic benzene degradation to sediments that varied with respect to contamination input predominant redox condition, and salinity. In spite of differences in methodology, microbial degradation of benzene was noted in slurries constructed with sediments from various geographical locations and range from aquifer sands to fine-grained estuarine muds, under methanogenic, sulfate-reducing, and iron-reducing conditions. In aquifer sediments under methanogenic conditions, benzene loss was concomitant with methane production, and microbial utilization of (14C)benzene yielded 14CO-2 and 14CH-4. In slurries with estuarine and aquifer sediments under sulfate-reducing conditions, the loss of sulfate in amounts consistent with the stoichiometric degradation of benzene or the conversion of (14C)benzene to 14CO-2 indicates that benzene was mineralized. Benzene loss also occurred in the presence of Fe(III) in sediments from freshwater environments. Microbial benzene utilization, however, was not observed under denitrifying conditions. These results indicate that the potential for the anaerobic degradation of benzene, which was once thought to be resistant to non-oxygenase attack, exists in a variety of aquatic sediments from widely distributed locations.

US$19.90

DOI: 10.1021/es960506a


Other references

Nakagawa, Yoshiaki, 1993: New bioassay technique for chitin synthesis regulators. Radioisotopes 42(11): 665-666

Prens, S.P.; de Vries, K.; van Doorn, M.B.A.; Prens, E.P., 2014: Medical indications for laser therapy in dermatology. Laser therapy in dermatology is often associated with cosmetic procedures. However, nowadays laser therapy has become a treatment modality for many dermatological diseases. We present three cases of patients with different dermatological diseases...

Koldovsky, P., 1962: Combined surgical removal and specific immunotherapy of experimental tumours. Survival of mice in which spontaneous tumors and cancerogen-induced tumors were surgically removed was prolonged both by active and passive immunity as compared with the controls, in which the tumors were only removed by operation. In the case of...

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Chauhan, P.M.; Mahiznan, P.; Roberts, T.W., 1979: Inflammatory fibrous polyps of small intestine. New York State Journal of Medicine 79(10): 1589-1591

Richardson, M.W.; Funkhouser, W.K.; Senior, B.; Weston, B.W., 2002: Spindle cell lesions of the head and neck mimicking rhabdomyosarcoma in children. Malignancies of the head and neck are uncommon among children. The most common solid tumors to occur in this region are rhabdomyosarcoma, Hodgkin disease, and non-Hodgkin lymphoma. Two children are described who presented with signs and symptoms c...

Al-Shammari, A.; Al-Khafaji, M.1; Bishara, M., 1981: The influence of rates of nitrogen, phosporus and potassium application on the yield of two potato varieties Solanum tuberosum, Iraq. Mesopotamia journal of agriculture6(2): 205-217

Macewen, M., 1977: Australias threatened giants; the Karri forests. Country life: 161 (4150) 88-90