Impact of the use of treated wastewater for agricultural need: Behavior of organic micropollutants in soil, transfer to crops, and related risks

Soil aquifer treatment (SAT) is considered to be an alternative technique able to enhance recharged water quality for aquifer recharge purposes. It allows the reuse of treated wastewater, which usually contains some recalcitrant organic micropollutants such as pharmaceutical and personal care products (PPCPs) and endocrine disrupting chemicals (EDCs). This study reports the removal capacity for a selection of organic micropollutants during SAT and the characterisation of the recharge system for the interpretation of the data. The experiment was performed in Angerville (France), where the treated wastewater effluent of the wastewater treatment plant (WWTP) is directly infiltrated through an excavated infiltration pond after biological treatment. The system was instrumented by installing piezometers downgradient of the infiltration pond, which were monitored, together with other reference points, and analysed for detailed interpretation. Results on the site characterisation allowed the quantification of the mixing proportion of the recharge water and groundwater and identification of the redox conditions encountered within the aquifer. With respect to the targeted micropollutants, results showed that they exhibited different behaviour during infiltration. Examples of atrazine, gemfibrozil and carbamazepine are discussed as a representation of the most characteristic patterns of organic contaminant fate after recharge.

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Investigating the role of adsorption and biodegradation in the removal of organic micropollutants during biological activated carbon filtration of treated wastewater

Journal of Water Reuse and Desalination ◽

10.2166/wrd.2012.012 ◽

2012 ◽

Vol 2 (3) ◽

pp. 127-139 ◽

Cited By ~ 16

Author(s):

M. Rattier ◽

J. Reungoat ◽

W. Gernjak ◽

A. Joss ◽

J. Keller

Keyword(s):

Activated Carbon ◽

Organic Contaminants ◽

Chemical Properties ◽

Primary Objective ◽

Treated Wastewater ◽

Secondary Effluent ◽

Batch Reactors ◽

Organic Micropollutants ◽

Trace Organic Contaminants ◽

Biological Activated Carbon

Municipal water recycling may expose humans and the environment to trace organic contaminants. We assessed biological activated carbon (BAC) filtration for removal of organic micropollutants (MPs). Adsorption experiments were carried out in batch reactors containing secondary effluent and new granular activated carbon (GAC) and preloaded BAC media. Results show that BAC has good potential for removal of dissolved organic carbon (40%) and MPs (60–95%). The primary objective was to better understand removal mechanisms of representative MPs at environmentally relevant concentrations. Adsorption and biodegradation of 20 compounds of varying physico-chemical properties were investigated by inhibiting the biomass with azide. Average removal of compounds by adsorption on GAC was 88 ± 5% with no influence of azide. Average BAC removal was 72 ± 15%, reduced to 59 ± 20% after azide addition, showing that biological activity is important for MP removal. Comparison of MP removal by BAC and BAC + azide showed a more important impact of the inhibition on the removal of negatively charged compounds. Sustained removal of recalcitrant compounds showed that BAC maintained sorption capacity. These results highlight the advantage of a combination of adsorption and biodegradation as compared to other biofiltration techniques for the long-term attenuation of MPs.

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Wood-based activated biochar to eliminate organic micropollutants from biologically treated wastewater

The Science of The Total Environment ◽

10.1016/j.scitotenv.2020.138417 ◽

2020 ◽

Vol 730 ◽

pp. 138417 ◽

Cited By ~ 5

Author(s):

Nikolas Hagemann ◽

Hans-Peter Schmidt ◽

Ralf Kägi ◽

Marc Böhler ◽

Gabriel Sigmund ◽

...

Keyword(s):

Treated Wastewater ◽

Organic Micropollutants ◽

Activated Biochar

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Assessment of organic micropollutants occurrence in treated wastewater using heat shock protein 47 stress responses in Chinese hamster ovary cells and GC/MS-based non-target screening

Water Science & Technology ◽

10.2166/wst.2016.426 ◽

2016 ◽

Vol 74 (10) ◽

pp. 2407-2416 ◽

Cited By ~ 3

Author(s):

Selma Etteieb ◽

Atsushi Kawachi ◽

Junkyu Han ◽

Foued Elayni ◽

Jamila Tarhouni ◽

...

Keyword(s):

Stress Response ◽

Heat Shock ◽

Heat Shock Protein ◽

Chinese Hamster Ovary ◽

Chinese Hamster Ovary Cells ◽

Chinese Hamster ◽

Treated Wastewater ◽

Organic Micropollutants ◽

Heat Shock Protein 47 ◽

Ovary Cells

Combining bioassays and analytical chemistry screening is a powerful approach to assess organic micropollutants which are the main contributors to toxic potential in complex mixtures of treated wastewater (TWW). The aim of this study was to perform a comprehensive toxicity assessment of treated effluents using stress response bioassays and then to assess the occurrence of the organic micropollutants which were responsible for this biological response using gas chromatography coupled with a mass spectrometry detector (GC/MS). Results showed that TWW samples induced significant stress response on Chinese hamster ovary cells, stably transfected with heat shock protein 47 promoter, at 0.1%, 1%, 5% and 10% concentrations. The organic chemical compounds responsible for stress response potential were identified at different percentage values using non-target chemical screening. Of the compounds detected in TWW1 and TWW4, 55.09% and 74.5% respectively, fell within the class of aliphatic hydrocarbons. Aliphatic hydrocarbons were also present in TWW3 at 26.46% whereas 11.96% corresponded to 6-acetyl-1,1,2,4,4,7-hexamethyltetralin and 16.08% to triethoxysilane. Moreover, 76.73% of TWW2 was recorded as decamethylcyclopentasiloxane (D5) and 17.44% as n-hexadecanoic acid.

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DECOLOURIZATION AND COD REMOVAL OF WASEWATER FROM ETHANOL PRODUCTION PROCESS FROM MOLASSES BY COAGULANTION USING INORGANIC ALUM

Science and Technology Development Journal ◽

10.32508/stdj.v13i3.2146 ◽

2010 ◽

Vol 13 (3) ◽

pp. 92-102

Author(s):

Trung Duc Le

Keyword(s):

Ethanol Production ◽

Oxygen Demand ◽

Cod Removal ◽

Treated Wastewater ◽

Treatment Processes ◽

Physico Chemical ◽

Biological Methods ◽

Treatment Step ◽

Main Material

The industrial production of ethanol by fermentation using molasses as main material that generates large quantity of wastewater. This wastewater contains high levels of colour and chemical oxygen demand (COD), that may causes serious environmental pollution. Most available treatment processes in Vietnam rely on biological methods, which often fail to treat waste water up to discharge standard. As always, it was reported that quality of treated wastewater could not meet Vietnameses discharge standard. So, it is necessary to improve the treatment efficiency of whole technological process and therefore, supplemental physico-chemical treatment step before biodegradation stage should be the appropriate choice. This study was carried out to assess the effect of coagulation process on decolourization and COD removal in molasses-based ethanol production wastewater using inorganic coaglutant under laboratory conditions. The experimental results showed that the reductions of COD and colour with the utilization of Al2(SO4)3 at pH 9.5 were 83% and 70%, respectively. Mixture FeSO4 – Al2(SO4)3 at pH 8.5 reduced 82% of colour and 70% of COD. With the addition of Polyacrylamide (PAM), the reduction efficiencies of colour, COD and turbidity by FeSO4 – Al2(SO4)3 were 87%, 73.1% and 94.1% correspondingly. It was indicated that PAM significantly reduced the turbidity of wastewater, however it virtually did not increase the efficiencies of colour and COD reduction. Furthermore, the coagulation processes using PAM usually produces a mount of sludge which is hard to be deposited.

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Situations and Trends for Reuse of Treated Wastewater

Journal of The Institute of Environmental Studies ◽

10.15336/jies.2014.18.7 ◽

2014 ◽

Vol 18 (0) ◽

pp. 7-12

Author(s):

Chung-Sik Choi ◽

Keyword(s):

Treated Wastewater ◽

Reuse Of Treated Wastewater

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Resorcinarene Cavitand Polymers for the Remediation of Halomethanes and 1,4-Dioxane

10.26434/chemrxiv.8847839 ◽

2019 ◽

Author(s):

Luke Skala ◽

Anna Yang ◽

Max Justin Klemes ◽

Leilei Xiao ◽

William Dichtel

Keyword(s):

Drinking Water ◽

Activated Carbon ◽

High Capacity ◽

The United States ◽

Water Sources ◽

Disinfection Byproducts ◽

Porous Polymer ◽

Organic Micropollutants ◽

Executive Summary ◽

Regulatory Limits

Executive summary: Porous resorcinarene-containing polymers are used to remove halomethane disinfection byproducts and 1,4-dioxane from water. Disinfection byproducts such as trihalomethanes are some of the most common micropollutants found in drinking water. Trihalomethanes are formed upon chlorination of natural organic matter (NOM) found in many drinking water sources. Municipalities that produce drinking water from surface water sources struggle to remain below regulatory limits for CHCl3 and other trihalomethanes (80 mg L–1 in the United States). Inspired by molecular CHCl3⊂cavitand host-guest complexes, we designed a porous polymer comprised of resorcinarene receptors. These materials show higher affinity for halomethanes than a specialty activated carbon used for trihalomethane removal. The cavitand polymers show similar removal kinetics as activated carbon and have high capacity (49 mg g–1 of CHCl3). Furthermore, these materials maintain their performance in real drinking water and can be thermally regenerated under mild conditions. Cavitand polymers also outperform activated carbon in their adsorption of 1,4-dioxane, which is difficult to remove and contaminates many public water sources. These materials show promise for removing toxic organic micropollutants and further demonstrate the value of using supramolecular chemistry to design novel absorbents for water purification.

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