Removal of triazines, triazoles and organophophates in biomixtures and application of a biopurification system for the treatment of laboratory wastewaters

Masís-Mora, Mario; Lizano-Fallas, Verónica; Beita-Sandí, Wilson; Rodríguez-Rodríguez, Carlos E.

doi:10.1016/j.chemosphere.2019.06.001

Cited by 24 publications

(9 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The microbial metabolism of EPO and FLU has remained elusive for several years, with the few studies on this topic suggesting that environmental microorganisms do not play a direct role in the environmental depuration of these pesticides [ 25 , 26 ]. Indeed, these compounds exhibit outstanding resistance to both biotic and abiotic degradation mechanisms, having shown to be prone to persist in soils, sediments, and biomixtures [ 27 , 28 , 29 , 30 , 31 ]. Nonetheless, we recently reported the biodegradation of these pesticides by environmental microbial communities obtained through a selective enrichment period [ 7 ].…”

Section: Discussionmentioning

confidence: 99%

Combining Culture-Dependent and Independent Approaches for the Optimization of Epoxiconazole and Fludioxonil-Degrading Bacterial Consortia

et al. 2021

View full text Add to dashboard Cite

Epoxiconazole (EPO) and fludioxonil (FLU) are two widely used fluorinated pesticides known to be highly persistent and with high ecotoxicological potential, turning them into pollutants of concern. This work aimed to optimize two degrading bacterial consortia, previously obtained from an agricultural soil through enrichment with EPO and FLU, by characterizing the contribution of their corresponding bacterial isolates to the biodegradation of these pesticides using both culture-dependent and independent methodologies. Results showed that a co-culture of the strains Hydrogenophaga eletricum 5AE and Methylobacillus sp. 8AE was the most efficient in biodegrading EPO, being able to defluorinate ca. 80% of this pesticide in 28 days. This catabolic performance is likely the result of a commensalistic cooperation, in which H. eletricum may be the defluorinating strain and Methylobacillus sp. may assume an accessory, yet pivotal, catabolic role. Furthermore, 16S rRNA metabarcoding analysis revealed that these strains represent a minority in their original consortium, showing that the biodegradation of EPO can be driven by less abundant phylotypes in the community. On the other hand, none of the tested combinations of bacterial strains showed potential to biodegrade FLU, indicating that the key degrading strains were not successfully isolated from the original enrichment culture. Overall, this work shows, for the first time, the direct involvement of two bacterial species, namely H. eletricum and Methylobacillus sp., in the biodegradation of EPO, while also offering insight on how they might cooperate to accomplish this process. Moreover, the importance of adequate culture-dependent approaches in the engineering of microbial consortia for bioremediation purposes is also emphasized.

show abstract

Section: Discussionmentioning

confidence: 99%

Combining Culture-Dependent and Independent Approaches for the Optimization of Epoxiconazole and Fludioxonil-Degrading Bacterial Consortia

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Several reports describe this trend for atrazine, with DT 50 values usually below 10 d − but systematically lower compared to dissipation in soil . Significantly faster removal has been determined in biomixtures compared to soil in the cases of cyanazine, prometon, simazine, and terbuthylazine. ,, Slower dissipation rates were observed for several triazines in a biomixture compared to soil, including ametryn, cyromazine, prometryn, simetryn, and terbutryn; nonetheless, in this case, the treated pesticide mixture was quite complex and at lower concentrations than usually treated at farms (38 compounds; the treated matrix was laboratory wastewater). Some of these compounds like ametryn and terbutryn showed faster removal rates (similar or slightly higher than soil) in biomixture assays with individual pesticides or simple mixtures.…”

Section: A Mostly Successful Story: Biopurification Systems For the T...mentioning

confidence: 93%

“…31 A couple of reports, on the contrary, describe an enhanced removal for tebuconazole 32 and epoxiconazole 33 in BPSs. Faster or slower elimination compared to soil was reported for ten triazoles at low concentrations during the treatment of complex wastewater of laboratory origin, achieving an overall removal of 73.4% of total triazole concentration after 281 d. 19 As in the case of triazoles, the assessment of neonicotinoids has also revealed cases of removal failure in BPSs, as reported for imidacloprid and thiamethoxam; 23 mineralization of the former has even shown DT 50 values over 3466 d, clearly making the process infeasible for real conditions. 34 Conversely, some works have achieved enhanced elimination of imidacloprid 32,35 or acetamiprid.…”

Section: A Mostly Successful Story: Biopurification Systems For the T...mentioning

confidence: 96%

On-Farm Removal of Pesticides: Current Insights on Biopurification Systems

Rodríguez-Rodríguez,

Rodríguez-Saravia

2023

ACS Agric. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

Point source contamination with pesticides is likely to occur at the farm level when pesticide-containing residues are not properly handled. To address this issue, biopurification systems (BPSs) were developed as a biotechnological approach for the on-farm treatment of pesticide-containing wastewater of agricultural origin. Despite the high removal capacity demonstrated toward diverse pesticides, BPSs have not been successful in eliminating some active ingredients, particularly from very persistent chemical groups. Moreover, the assessment of BPS efficiency has barely included an ecotoxicological evaluation, a key factor in terms of bioremediation. Proper optimization of BPS regarding the design of enhanced biomixtures (biological active matrix of BPSs) and the assessment of their behavior during real pesticide application cycles are required before massive field implementation; furthermore, specific biomixtures and operational recommendations should be applied for each crop/pesticide application cycle. This Review discusses several of these topics, including (i) pesticide removal scope; (ii) ecotoxicological monitoring of BPSs; (iii) biomixture optimization and enhancement by bioaugmentation approaches; (iv) the use of BPSs for the disposal of antibiotics and the effects of these compounds on pesticide removal; (v) unsolved operational guidelines like the BPS's life span and disposal of spent biomixtures.

show abstract

“…As far as we know, the existing degradation technologies of TFs mainly include biochemical process (Wu et al 2018;Wu et al 2019), adsorption (Masis-Mora et al 2019), advanced oxidation processes (AOPs) such as Fenton oxidation (Zhang et al 2020), photo-catalytic oxidation (Garcia-Muñoz et al 2020), and electrocatalysis (Cui et al 2017). At present, the AOPs have been developed rapidly in degradation of organic pollutants, because of strong oxidation ability, mild reaction conditions, fast reaction rate, and good treatment effect (Zhang et al 2020;Garcia-Muñoz et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Degradation pathway of triazole fungicides and synchronous removal of transformation products via photo-electrocatalytic oxidation tandem MoS2 adsorption

Wang

Chen

Sun

et al. 2021

Environ Sci Pollut Res

View full text Add to dashboard Cite

A simple and effective tandem process of photo-electrocatalytic oxidation (PECO)-MoS2 adsorption was developed for the synchronous removal of triazole fungicides (TFs) and toxicological transformation products (TPs). In order to accurately identify trace TPs and evaluate degradation pathway during water treatment, a sensitive analytical method was developed on the basis of the stir bar sorptive extraction (SBSE) pretreatment tandem LC-MS/MS technique. Firstly, the typical TFs (PRO, TET, and DIN, C0 = 1.0 mg/L) in actual water samples were treated under the optimal process (bias voltage 1.8 V, pH 4, irradiation intensity 50 mW/cm2, 0.05 g MoS2/100 mL, 350 rpm, adsorption of 5 min). The result indicated that the residues of PRO, TET, and DIN in secondary effluent were 0.0973, 0.0617, and 0.0012 mg/L, respectively, with the removal rates of 90.3%, 93.8%, and 99.9%, respectively, undergoing 30-min photo-electrocatalysis and 5-min adsorption. The alkaline medium was favorable for the adsorption of MoS2 to TFs. The assessment results of potential cancer risk indicated that the residues of TFs in secondary effluent were safe for drinking water consumption. Besides, the major TPs were identified via the SBSE-HRLC-MS/MS technique, and one possible transformation pathway of TFs was proposed. TFs mainly underwent dehydrochlorination, cyclization, hydroxylation, etc. to produce a series of nitrogenous heterocyclic compounds that possess higher polarity than parents, hinting that TPs might pose potential aquatic toxicity. However, TPs can be removed synchronously by this tandem technique. The current study can provide a theoretical basis for the harmless treatment of TFs in the water environment.

show abstract

Removal of triazines, triazoles and organophophates in biomixtures and application of a biopurification system for the treatment of laboratory wastewaters

Cited by 24 publications

References 59 publications

Combining Culture-Dependent and Independent Approaches for the Optimization of Epoxiconazole and Fludioxonil-Degrading Bacterial Consortia

Combining Culture-Dependent and Independent Approaches for the Optimization of Epoxiconazole and Fludioxonil-Degrading Bacterial Consortia

On-Farm Removal of Pesticides: Current Insights on Biopurification Systems

Degradation pathway of triazole fungicides and synchronous removal of transformation products via photo-electrocatalytic oxidation tandem MoS2 adsorption

Contact Info

Product

Resources

About