Fate of organochlorine 14C-dicofol in a lab-scale wastewater treatment

Oliveira, Jaime L. M.; Langenbach, Tomaz; Dezotti, Márcia

doi:10.1590/s1517-83822008000200021

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…These processes were performed in duplicate. The experimental model was the same as that used by Oliveira et al (2008). An atrazine concentration of 1.0 mg L -1 was used because it is the highest concentration of organic micropollutants that can be found in sewage treatment systems as according to Byrns (2001).…”

Section: Experimental Approachmentioning

confidence: 99%

Fate of the herbicide 14C-atrazine during sewage treatment on a lab-scale bioreactor

Oliveira¹,

Ferreira²,

Silva³

et al. 2013

Rev. ambiente água

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Atrazine (2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine) is a persistent herbicide used on some crops and it has been found both in ground and surface water and drainage systems. This work studied the behaviour of atrazine during a sewage treatment process by activated sludge. The process was conducted on a laboratory scale using an under fed-batch system with a hydraulic retention time of 24 hours. After this period, the raw sewage (with atrazine) was changed and another batch was begun (the sludge age was 7 days old). Radiolabel molecules (14C-atrazine) were used for to trace their fate and to measure to the 14C-CO2 and the residues of atrazine were analysed by HPLC/UV. Initially about 50% of radioactivity was sorbed by the settled sludge but it was desorbed with successive additions of raw sewage without atrazine. The final balance of radioactivity showed that 98% of the atrazine was released into the treated effluent, probably without any biodegradation. Therefore, other organic micropollutants with similar characteristics to atrazine may behave a similar way

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Section: Experimental Approachmentioning

confidence: 99%

Fate of the herbicide 14C-atrazine during sewage treatment on a lab-scale bioreactor

Oliveira¹,

Ferreira²,

Silva³

et al. 2013

Rev. ambiente água

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Biodegradation of ¹⁴C-dicofol in wastewater aerobic treatment and sludge anaerobic biodigestion

Oliveira

Silva²,

Martins³

et al. 2011

Environmental Technology

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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.

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Fate of organochlorine 14C-dicofol in a lab-scale wastewater treatment

Cited by 2 publications

References 4 publications

Fate of the herbicide 14C-atrazine during sewage treatment on a lab-scale bioreactor

Fate of the herbicide 14C-atrazine during sewage treatment on a lab-scale bioreactor

Biodegradation of ¹⁴C-dicofol in wastewater aerobic treatment and sludge anaerobic biodigestion

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Fate of organochlorine 14C-dicofol in a lab-scale wastewater treatment

Cited by 2 publications

References 4 publications

Fate of the herbicide 14C-atrazine during sewage treatment on a lab-scale bioreactor

Fate of the herbicide 14C-atrazine during sewage treatment on a lab-scale bioreactor

Biodegradation of 14C-dicofol in wastewater aerobic treatment and sludge anaerobic biodigestion

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Biodegradation of ¹⁴C-dicofol in wastewater aerobic treatment and sludge anaerobic biodigestion