Fiocruz, Rio de Janeiro, Brazil.
Environ Technol. 2012 Feb-Mar;33(4-6):695-701. doi: 10.1080/09593330.2011.588961.
Organic micropollutants are often found in domestic and industrial effluents. Thus, it is important to learn their fate, the metabolites generated and their sorption during biological treatment processes. This work investigated the biodegradation of 14C-dicofol organochloride during wastewater aerobic treatment and sludge anaerobic biodigestion. The performance of these processes was evaluated by physical-chemical parameters. Radioactivity levels were monitored in both treatments, and residues of dicofol (DCF) and dichlorobenzophenone (DBP) were quantified by HPLC/UV. The efficiency of the aerobic and anaerobic processes was slightly reduced in the presence of DCF and DBP. After aerobic treatment, only 0.1% of DCF was mineralized, and 57% of radioactivity remained sorbed on biological sludge as DBP. After 18 days of anaerobiosis, only 3% of DCF and 5% of DBP were detected in the sludge. However, 70% of radioactivity remained in the sludge, probably as other metabolites. Dicofol was biodegraded in the investigated process, but not mineralized.
有机微污染物通常存在于家庭和工业废水中。因此，了解它们在生物处理过程中的命运、生成的代谢物及其吸附作用非常重要。本研究调查了 14C-滴滴涕有机氯化物在废水好氧处理和污泥厌氧生物消化过程中的生物降解情况。通过物理化学参数评估这些过程的性能。在两种处理方法中都监测了放射性水平，并通过 HPLC/UV 定量测定了滴滴涕（DCF）和二氯苯甲酮（DBP）的残留量。在 DCF 和 DBP 的存在下，好氧和厌氧过程的效率略有降低。好氧处理后，只有 0.1%的 DCF 被矿化，57%的放射性物质仍以 DBP 的形式吸附在生物污泥上。厌氧 18 天后，污泥中仅检测到 3%的 DCF 和 5%的 DBP。然而，70%的放射性物质仍残留在污泥中，可能是其他代谢物。在研究过程中滴滴涕被生物降解，但未被矿化。
