Association between degradation of pharmaceuticals and endocrine-disrupting compounds and microbial communities along a treated wastewater effluent gradient in Lake Mead

Blunt, Susanna M.; Sackett, Joshua; Rosen, Michael R.; Benotti, Mark J.; Trenholm, Rebecca A.; Vanderford, Brett J.; Hedlund, Brian P.; Moser, Duane P.

doi:10.1016/j.scitotenv.2017.10.052

Cited by 38 publications

(19 citation statements)

References 60 publications

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“…Furthermore, such lake zones contained fewer endocrine disruptors, reinforcing the idea that this specific site is isolated from the influence of other sources of contamination. This provides support for the conclusion that the functional traits of bacterial communities change in response to anthropogenic pressures [62].…”

Section: Land Use Influence On Edc Distribution and Bacteria Community Structuresupporting

confidence: 69%

Distribution of Endocrine Disruptor Chemicals and Bacteria in Saline Pétrola Lake (Albacete, SE Spain) Protected Area is Strongly Linked to Land Use

et al. 2020

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Saline lakes are subject to numerous environmental impacts related to human activities, changing the chemical and biological natural conditions of the ecosystem. Sustainable development depends on the conservation of such delicate saline ecosystems, which may hold distinctive biodiversity. Pollution is one of the major threats to surface water bodies, for example by increasing nutrient contents and organic pollutants, including endocrine disrupting chemicals. Microbially mediated redox processes exert a fundamental control on nutrient turnover and contaminant removal. This study examines the influence of land use on the distribution of endocrine disrupting chemicals as well as on the microbial community composition in lacustrine sediments from Pétrola saline Lake (SE Spain). The lake is impacted by anthropogenic activities (agriculture, farming, mining and urban wastewater spills). Applying chemical and molecular tools (sequencing of 16S rRNA gene) showed a clear influence of land use on the chemistry and bacterial abundance of the lake sediments. The sampling points closer to wastewater outflows and mining ponds (2635, 2643 and 2650) showed fewer numbers and types of endocrine disrupting chemicals as well as a smaller number of families in the microbial community. These findings improve our understanding of how land use affects both water chemistry and the abundance of organisms responsible for biogeochemical cycles.

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Section: Land Use Influence On Edc Distribution and Bacteria Community Structuresupporting

confidence: 69%

Distribution of Endocrine Disruptor Chemicals and Bacteria in Saline Pétrola Lake (Albacete, SE Spain) Protected Area is Strongly Linked to Land Use

et al. 2020

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“…The biodegradation half-lives of the nine micropollutants estimated from literature data 6,7,[30][31][32][33][34][35][36][37][38][39][40][41] were summarized as a geometric mean with uncertainty estimated with a condence factor (Cf) 42 where 95% of expected values lie between the geometric mean Â Cf and the geometric mean O Cf.…”

Section: Evaluation Of Empirical Monitoring Data From Jds3mentioning

confidence: 99%

Prospects for finding Junge variability-lifetime relationships for micropollutants in the Danube river

Coll

Lindim

Sobek

et al. 2019

Environ. Sci.: Processes Impacts

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“…This antibiotic is frequently prescribed for bacterial infections such as urinary tract infections, bronchitis, and prostatitis, and it has been detected in water samples at concentrations on the order of few µg/L. 10 The experimental conditions used for SMX were the same as those described for CR and pNDA. Samples were obtained at the same time intervals described in section “Hydroxyl radical production” and section “CR degradation” in “Organic pollutant removal using HC,” the initial concentration of SMX used was 40 µM in deionized water, and 2 mL aliquots of SMX solution were taken using disposable plastic pipettes and filtered using syringe filters (0.22 µm pore size, 25 mm diameter; Tisch Environmental, Inc.) to avoid suspended solids.…”

Section: Methodsmentioning

confidence: 99%

“…Congo red (CR), an azo dye, and sulfamethoxazole (SMX), an antibiotic, were used as model contaminants to assess the feasibility of the process for the removal of contaminants of concern. 10 The conditions used to generate the cavitation process-such as pressure, flow velocity, and temperature-are also specified in this report to ensure repeatable results. Figure 1 shows a sketch of the setup used for the experimental trials in this work along with a detailed sketch of the actual HC reactor used.…”

Section: Introductionmentioning

confidence: 99%

On the Nature of Hydrodynamic Cavitation Process and Its Application for the Removal of Water Pollutants

Bandala

Rodríguez-Narváez

2019

Air, Soil and Water Research

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Cavitation is considered a high energy demanding process for water treatment. For this study, we used a simple experimental setup to generate cavitation at a low pressure (low energy) and test it for hydroxyl radical production using a well-known chemical probe as a hydroxyl radical scavenger. The conditions for generating the cavitation process (eg, pressure, flow velocity, temperature, and other significant variables) were used to degrade model contaminants, an azo dye and an antibiotic. The amount of hydroxyl radicals generated by the system was estimated using N,N-dimethyl-p-nitrosoaniline (pNDA) as hydroxyl radical scavenger. The capability of hydrodynamic cavitation (HC) to degrade contaminants was assessed using Congo red (CR) and sulfamethoxazole (SMX) as model contaminants. Different chemical models were analyzed using UV-visible spectrophotometry (for pNDA and CR) and high-performance liquid chromatography (HPLC) (for SMX) after HC treatment under different process conditions (ie, pressure of 13.7 and 10.3 kPa, and flow rates of 0.14 to 3.6 × 10−4 m3/s). No pNDA bleaching was observed for any of the reaction conditions tested after 60 minutes of treatment, which suggests that there was no hydroxyl radical generation during the process. However, 50% degradation of CR and 25% degradation of SMX were observed under the same process conditions, comparable with previously reported results. These results suggest that the process is most likely thermally based rather than radically based, and therefore, it can degrade organic pollutants even if no hydroxyl radicals are produced. Hydrodynamic cavitation, either alone or coupled with other advanced water technologies, has been identified as a promising technology for removing organic contaminants entering the water cycle; however, more research is still needed to determine the specific mechanisms involved in the process and the optimal operation conditions for the system.

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Association between degradation of pharmaceuticals and endocrine-disrupting compounds and microbial communities along a treated wastewater effluent gradient in Lake Mead

Cited by 38 publications

References 60 publications

Distribution of Endocrine Disruptor Chemicals and Bacteria in Saline Pétrola Lake (Albacete, SE Spain) Protected Area is Strongly Linked to Land Use

Distribution of Endocrine Disruptor Chemicals and Bacteria in Saline Pétrola Lake (Albacete, SE Spain) Protected Area is Strongly Linked to Land Use

Prospects for finding Junge variability-lifetime relationships for micropollutants in the Danube river

On the Nature of Hydrodynamic Cavitation Process and Its Application for the Removal of Water Pollutants

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