Phthalate and alkylphenol removal within wastewater treatment plants using physicochemical lamellar clarification and biofiltration

Bergé, Alexandre; Gaspéri, Johnny; Rocher, Vincent; Coursimault, Annie; Moilleron, Régis

doi:10.2495/wp120311

Cited by 5 publications

(1 citation statement)

References 22 publications

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“…1), are a major class of nonionic surfactants used in household, industrial, and agricultural applications (Bergé et al 2012a,b). Although the production of NPEOs has exhibited a decreasing trend in the USA, Canada, and the EU as a result of highly restrictive regulations (EU 2003;USEPA 2010), worldwide output increased from 300,000 t in 1994 to 500,000 t in 2002 (Berryman et al 2003;Ying et al 2002). The increase in consumption by emerging nations such as Brazil, Russia, India, and China has been considered as the main reason (Bergé et al 2012a).…”

Section: Introductionmentioning

confidence: 99%

Degradation pathways of low-ethoxylated nonylphenols by isolated bacteria using an improved method

Zhang

Yang

2013

Environ Sci Pollut Res

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Nonylphenol ethoxylates (NPEOs) with low ethoxylation degree (NP av2 EO; containing two ethoxy units on average) and estrogenic properties are the intermediate products of nonionic surfactant NPEOs. To better understand the environmental fate of low-ethoxylated NPEOs, phylogenetically diverse low-ethoxylated NPEO-degrading bacteria were isolated from activated sludge using gellan gum as the gelling reagent. Four isolates belonging to four genera, i.e., Pseudomonas sp. NP522b in γ-Proteobacteria, Variovorax sp. NP427b and Ralstonia sp. NP47a in β-Proteobacteria, and Sphingomonas sp. NP42a in α-Proteobacteria were acquired. Ralstonia sp. NP47a or Sphingomonas sp. NP42a, have not been reported for the degradation of low-ethoxylated NPEOs previously. The biotransformation pathways of these isolates were investigated. The first three strains (NP522b, NP427b, and NP47a) exhibited high NP av2 EO oxidation ability by oxidizing the polyethoxy (EO) chain to form low-ethoxylated nonylphenoxy carboxylates, and then further oxidizing the alkyl chain to form carboxyalkylphenol polyethoxycarboxylates. Furthermore, Sphingomonas sp. NP42a degraded NP av2 EO through a nonoxidative pathway with nonylphenol monoethoxylate as the dominant product.

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Section: Introductionmentioning

confidence: 99%

Degradation pathways of low-ethoxylated nonylphenols by isolated bacteria using an improved method

Zhang

Yang

2013

Environ Sci Pollut Res

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Phthalates removal efficiency in different wastewater treatment technology in the Eastern Cape, South Africa

Salaudeen

Okoh

Agunbiade

et al. 2018

Environ Monit Assess

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The removal capacity of different wastewater treatment plant (WWTP) technologies adopted in rural areas for phthalate was investigated in the Eastern Cape, South Africa. Wastewater samples collected from three selected WWTPs which use activated sludge (AS), trickling filter (TF), and oxidation pond (OP) technology were extracted using the solid-phase extraction method followed by gas chromatography-mass spectrometry (GC-MS) analysis. The six selected phthalate esters (PAEs) dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP), benzyl butyl phthalate (BBP), di(2-ethyl hexyl) phthalate (DEHP), and di-n-octyl phthalate (DOP) were detected in all the samples collected from the WWTPs. DBP was the most abundant compound in the influent, effluent, and sludge samples with a maximum detection of 2497 μgL, 24.2 μgL, and 1249 μg/g dW, respectively, followed by DEHP and BBP. There was a relatively high removal capacity achieved by AS in Alice, TF in Berlin, and OP in Bedford with a removal efficiency that varied between 77 and 99%, 76 and 98%, and 61 and 98%, respectively. A high significant correlation of PAE removal with total suspended solids (TSS) and turbidity suggests that the removal performance proceeded more through adsorption on settling particles and sludge than on biodegradation. However, the concentrations of PAEs detected in the final effluent and sludge samples exceeded acceptable levels allowed internationally for a safe aquatic environment. AS may have exhibited a more stable and better performance across the different seasons; however, pollution source control still deserves a special attention to prevent the risk posed by these micropollutants.

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Meta-analysis of environmental contamination by alkylphenols

Bergé

Cladière

Gaspéri

et al. 2012

Environ Sci Pollut Res

102

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Alkylphenols and alkylphenol ethoxylates (APE) are toxics classified as endocrine-disrupting compounds; they are used in detergents, paints, herbicides, pesticides, emulsifiers, wetting and dispersing agents, antistatic agents, demulsifiers, and solubilizers. Many studies have reported the occurrence of alkylphenols in different environmental matrices, though none of these studies have yet to establish a comprehensive overview of such compounds in the water cycle within an urban environment. This review summarizes APE concentrations for all environmental media throughout the water cycle, from the atmosphere to receiving waters. Once the occurrence of compounds has been assessed for each environmental compartment (urban wastewater, wastewater treatment plants [WWTP], atmosphere, and the natural environment), data are examined in order to understand the fate of APE in the environment and establish their geographical and historical trends. From this database, it is clear that the environment in Europe is much more contaminated by APE compared to North America and developing countries, although these APE levels have been decreasing in the last decade. APE concentrations in the WWTP effluent of developed countries have decreased by a factor of 100 over the past 30 years. This study is aimed at identifying both the correlations existing between environmental compartments and the processes that influence the fate and transport of these contaminants in the environment. In industrial countries, the concentrations observed in waterways now represent the background level of contamination, which provides evidence of a past diffuse pollution in these countries, whereas sediment analyses conducted in developing countries show an increase in APE content over the last several years. Finally, similar trends have been observed in samples drawn from Europe and North America.

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Phthalate and alkylphenol removal within wastewater treatment plants using physicochemical lamellar clarification and biofiltration

Cited by 5 publications

References 22 publications

Degradation pathways of low-ethoxylated nonylphenols by isolated bacteria using an improved method

Degradation pathways of low-ethoxylated nonylphenols by isolated bacteria using an improved method

Phthalates removal efficiency in different wastewater treatment technology in the Eastern Cape, South Africa

Meta-analysis of environmental contamination by alkylphenols

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