Role of effluent organic matter in the photochemical degradation of compounds of wastewater origin

Bodhipaksha, Laleen C.; Sharpless, Charles M.; Chin, Yu‐Ping; MacKay, Allison A.

doi:10.1016/j.watres.2016.12.016

Cited by 92 publications

(50 citation statements)

References 63 publications

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“…E 2 :E 3 values are typically 3.5–5 in terrestrially-impacted aquatic systems (Peterson et al, 2012) and 7–10 in microbially-dominated freshwater or marine systems (Helms et al, 2008; Peterson et al, 2012). The E 2 :E 3 values of the Nine Springs secondary effluents are within the range of values previously reported for secondary effluent (i.e., 4.6–7.0; Bodhipaksha et al, 2017; Mostafa and Rosario-Ortiz, 2013), while E 2 :E 3 has not been previously reported for primary effluent. The E 2 :E 3 values indicate that the molecular weight of most of the Nine Springs samples is similar to microbially-derived DOM, while the relatively high molecular weight of the Ostara influent is more similar to terrestrially-derived DOM.…”

Section: Resultssupporting

confidence: 85%

The effect of advanced secondary municipal wastewater treatment on the molecular composition of dissolved organic matter

2017

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There is a growing interest in water reuse and in recovery of nutrients from wastewater. Because many advanced treatment processes are designed to remove organic matter, a better understanding of the composition of dissolved organic matter (DOM) in wastewater is needed. To that end, we assessed DOM in the Nine Springs Wastewater Treatment Plant in Madison, Wisconsin by UV–visible spectroscopy and Fourier transform-ion cyclotron resonance mass spectrometry. Samples were collected from the influent and effluent of two different secondary treatment processes and their respective secondary clarifiers, the UV disinfection unit, and an Ostara treatment system, which produces struvite via chemical precipitation. The optical properties reveal that DOM throughout the plant is relatively aliphatic and is low in molecular weight compared to DOM in freshwater systems. Furthermore, the DOM is rich in heteroatoms (e.g., N, S, P, and Cl) and its molecular formulas are present in the lipid-, protein-, carbohydrate-, and lignin-like regions of van Krevelen diagrams. Secondary treatment produces DOM that is more aromatic and more complex, as shown by the loss of highly saturated formulas and the increase in the number of CHO, CHON, and CHOP formulas. The two secondary treatment processes produce DOM with distinct molecular compositions, while the secondary clarifiers and UV disinfection unit result in minimal changes in DOM composition. The Ostara process decreases the molecular weight of DOM, but does not otherwise alter its composition. The optical properties agree with trends in the molecular composition of DOM within the main treatment train of the Nine Springs plant.

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Section: Resultssupporting

confidence: 85%

The effect of advanced secondary municipal wastewater treatment on the molecular composition of dissolved organic matter

2017

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“…For example, this may occur near sewage treatment plants where indirect photoreactions can be accelerated due to the high concentration of CDOM in the effluent. 407,408 Since our last update, 9 additional research has confirmed that indirect photodegradation is an important mechanism for the breakdown of a wide-range of contaminants, including healthrelated compounds, [409][410][411] carbon nanomaterials, [412][413][414][415] pesticides, [416][417][418] and UV filters. 408 Improved evaluation of these photodegradation processes is now being achieved with readily accessible models of solar UV radiation 320 to improve predictions of degradation of contaminants in the environment.…”

Section: Human-induced Changes In Stratospheric Ozone and Runoff Of Uv-absorbing Substances From Land Continue To Alter Photoreactions Ofmentioning

confidence: 94%

Environmental effects of ozone depletion, UV radiation and interactions with climate change: UNEP Environmental Effects Assessment Panel, update 2017

Bernhard

Neale

Barnes

et al. 2018

Photochem Photobiol Sci

200

107

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The Environmental Effects Assessment Panel (EEAP) is one of three Panels of experts that inform the Parties to the Montreal Protocol. The EEAP focuses on the effects of UV radiation on human health, terrestrial and aquatic ecosystems, air quality, and materials, as well as on the interactive effects of UV radiation and global climate change. When considering the effects of climate change, it has become clear that processes resulting in changes in stratospheric ozone are more complex than previously held. Because of the Montreal Protocol, there are now indications of the beginnings of a recovery of stratospheric ozone, although the time required to reach levels like those before the 1960s is still uncertain, particularly as the effects of stratospheric ozone on climate change and vice versa, are not yet fully understood. Some regions will likely receive enhanced levels of UV radiation, while other areas will likely experience a reduction in UV radiation as ozone- and climate-driven changes affect the amounts of UV radiation reaching the Earth's surface. Like the other Panels, the EEAP produces detailed Quadrennial Reports every four years; the most recent was published as a series of seven papers in 2015 (Photochem. Photobiol. Sci., 2015, 14, 1-184). In the years in between, the EEAP produces less detailed and shorter Update Reports of recent and relevant scientific findings. The most recent of these was for 2016 (Photochem. Photobiol. Sci., 2017, 16, 107-145). The present 2017 Update Report assesses some of the highlights and new insights about the interactive nature of the direct and indirect effects of UV radiation, atmospheric processes, and climate change. A full 2018 Quadrennial Assessment, will be made available in 2018/2019.

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“…HPLC analyses were performed and Figure 9 shows the HPLC chromatograms. Efficiency degradation of E1 and 17β-E2 was equal to 30.40% and 56.84%, respectively; which is lower than performance of the system for synthetic wastewater; it can be in the result of containing complex matrices of organic matter and other competing chemicals in real samples and higher level of organic content of them naturally (Bodhipaksha et al, 2017); in addition, phosphate ions which abundantly found in wastewater, can inhibit the reaction rate by adsorption on TiO2 crystals (Blanco-Galvez et al, 2007). This result highlights the importance of moderation of AOPs in pilot tests before real scale application.…”

Section: Evaluation Of Applicability the Methods For Real Wastewater Mmentioning

confidence: 76%

Assessment of environmental applicability of TiO2 coated self-cleaning glass for photocatalytic degradation of estrone, 17β-estradiol and their byproducts

Matin¹,

Amani‐Ghadim²,

Matin³

et al. 2019

EgeJFAS

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Optimization of photocatalytic degradation of two natural estrogenic compounds, estrone (E1) and 17β-estradiol (17β-E2) in aqueous medium was performed on TiO2 coated Pilkington ActivTM self-cleaning glass as a novel approach to eliminate free nano-TiO2 releasing to the intended environment after treatment. The active glass was characterized by Atomic Force Microscopy (AFM), X-ray diffraction (XRD), and Raman spectroscopy to characterize the TiO2 nanoparticles. The main purposes were mineralization of target compounds in the treated water during the photocatalytic reaction and also to investigate the oxidation by products. Response Surface Methodology (RSM) has been applied to optimize the photocatalytic degradation by changing time, pH, and light intensity as effective factors. According to the results, time was the more effective parameter. The maximum efficiency degradation was achieved in alkaline media. Due to interactive effects between variable factors, 1 mg/L aqueous solution of E1 and 17β-E2 in water was totally decomposed by TiO2 photocatalyzed reactions under UV-C irradiation of 10.08 W/m2 for 52.49 min at pH 9.42. Results of GC-MS analysis were introduced 17-deoxy Estrone and 2-Hydroxyestradiol as intermediate products for E1 and 17β-E2, respectively. All of the peaks finally disappeared after 170 min. Optimized conditions were applied for real sample of wastewater, presenting 30.40% and 56.84% in the efficiency degradation of E1 and 17β-E2, respectively.

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Role of effluent organic matter in the photochemical degradation of compounds of wastewater origin

Cited by 92 publications

References 63 publications

The effect of advanced secondary municipal wastewater treatment on the molecular composition of dissolved organic matter

The effect of advanced secondary municipal wastewater treatment on the molecular composition of dissolved organic matter

Environmental effects of ozone depletion, UV radiation and interactions with climate change: UNEP Environmental Effects Assessment Panel, update 2017

Assessment of environmental applicability of TiO2 coated self-cleaning glass for photocatalytic degradation of estrone, 17β-estradiol and their byproducts

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