Prediction of the removal efficiency of emerging organic contaminants in constructed wetlands based on their physicochemical properties

2021 ◽  
Vol 294 ◽  
pp. 112916
Author(s):  
Huma Ilyas ◽  
Ilyas Masih ◽  
Eric D. van Hullebusch
Keyword(s):  
Physicochemical Properties ◽  
Removal Efficiency ◽  
Constructed Wetlands ◽  
Organic Contaminants ◽  
Emerging Organic Contaminants

scholarly journals The anaerobic biodegradation of emerging organic contaminants by horizontal subsurface flow constructed wetlands

2021 ◽  
Author(s):  
H. Ilyas ◽  
I. Masih ◽  
E. D. van Hullebusch
Keyword(s):  
Removal Efficiency ◽  
Organic Contaminants ◽  
Subsurface Flow ◽  
Anaerobic Biodegradation ◽  
Risk Quotient ◽  
Emerging Organic Contaminants ◽  
Steroidal Hormones ◽  
Subsurface Flow Constructed Wetland ◽  
Estimated Risk ◽  
Horizontal Subsurface Flow

Abstract The horizontal subsurface flow constructed wetland (HFCW) is widely studied for the treatment of wastewater containing emerging organic contaminants (EOCs): pharmaceuticals, personal care products, and steroidal hormones. This study evaluates the performance of HFCW for the removal of these types of EOCs based on the data collected from peer-reviewed journal publications. In HFCW, anaerobic biodegradation is an important removal mechanism of EOCs besides their removal by the filter media (through sedimentation, adsorption, and precipitation) and plant uptake. The average removal efficiency of 18 selected EOCs ranged from 39% to 98%. The moderate to higher removal efficiency of 12 out of 18 selected EOCs in HFCW indicates the suitability of this type of CW for the treatment of wastewater containing these EOCs. The reasonably good removal (>50% in most of the cases) of these EOCs in HFCW might be due to the occurrence of anaerobic biodegradation as one of their major removal mechanisms in CWs. Although the effluent concentration of EOCs was substantially decreased after the treatment, the environmental risk posed by them was not fully reduced in most cases. For instance, estimated risk quotient of 11 out of 18 examined EOCs was extremely high for the effluent of HFCW.

scholarly journals Pharmaceuticals' removal by constructed wetlands: a critical evaluation and meta-analysis on performance, risk reduction, and role of physicochemical properties on removal mechanisms

2020 ◽  
Vol 18 (3) ◽  
pp. 253-291 ◽  
Author(s):  
Huma Ilyas ◽  
Ilyas Masih ◽  
Eric D. van Hullebusch
Keyword(s):  
Linear Regression ◽  
Physicochemical Properties ◽  
Removal Efficiency ◽  
Constructed Wetlands ◽  
Linear Regression Analysis ◽  
Critical Evaluation ◽  
Quality Standard ◽  
P Value ◽  
Risk Category ◽  
Removal Mechanisms

Abstract This paper presents a comprehensive and critical analysis of the removal of pharmaceuticals (PhCs), the governing physicochemical properties, and removal mechanisms in constructed wetlands (CWs). The average removal efficiency of the most widely studied 34 PhCs ranges from 21% to 93%, with the exception of one PhC that exhibited negative removal. Moreover, CWs are effective in significantly reducing the environmental risk caused by many PhCs. Based on risk assessment, 12 PhCs were classified under high risk category (oxytetracycline > ofloxacin > sulfamethoxazole > erythromycin > sulfadiazine > gemfibrozil > ibuprofen > acetaminophen > salicylic acid > sulfamethazine > naproxen > clarithromycin), which could be considered for regular monitoring, water quality standard formulation and control purposes. Biodegradation (aerobic and anaerobic) is responsible for the removal of the majority of PhCs, often in conjunction with other mechanisms (e.g., adsorption/sorption, plant uptake, and photodegradation). The physicochemical properties of molecules play a pivotal role in the elimination processes, and could serve as important predictors of removal. The correlation and multiple linear regression analysis suggest that organic carbon sorption coefficient (Log Koc), octanol-water distribution coefficient (Log Dow), and molecular weight form a good predictive linear regression model for the removal efficiency of PhCs (R2 = 0.65, P-value <0.05).

scholarly journals Emerging Organic Contaminants in Chinese Surface Water: Identification of Priority Pollutants

Engineering ◽  
2021 ◽  
Author(s):  
Mengmeng Zhong ◽  
Tielong Wang ◽  
Wenxing Zhao ◽  
Jun Huang ◽  
Bin Wang ◽  
...  
Keyword(s):  
Surface Water ◽  
Organic Contaminants ◽  
Priority Pollutants ◽  
Emerging Organic Contaminants

Kinetics and Removal Efficiency of Nitrogen in Constructed Wetlands Cultivated with Different Plant Species for Treating Swine Wastewater Applied at Different Rates

2021 ◽  
Vol 232 (1) ◽  
Author(s):  
Fátima Resende Luiz Fia ◽  
Antonio Teixeira de Matos ◽  
Ronaldo Fia ◽  
Mateus Pimentel de Matos ◽  
Alisson Carraro Borges ◽  
...  
Keyword(s):  
Plant Species ◽  
Removal Efficiency ◽  
Constructed Wetlands ◽  
Swine Wastewater

Carbon–titanium dioxide (C/TiO2) nanofiber composites for chemical oxidation of emerging organic contaminants in reactive filtration applications

2021 ◽  
Vol 8 (3) ◽  
pp. 711-722
Author(s):  
Katherine E. Greenstein ◽  
Matthew R. Nagorzanski ◽  
Bailey Kelsay ◽  
Edgard M. Verdugo ◽  
Nosang V. Myung ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Water Treatment ◽  
Organic Contaminants ◽  
Membrane Filtration ◽  
Titanium Dioxide Nanoparticles ◽  
Chemical Oxidation ◽  
Tio2 Nanofiber ◽  
System P ◽  
Filtration System ◽  
Emerging Organic Contaminants

Electrospun carbon nanofibers with integrated titanium dioxide nanoparticles are used for water treatment in a photoactive membrane filtration system.

Analytical procedures for the determination of emerging organic contaminants in plant material: A review

2012 ◽  
Vol 722 ◽  
pp. 8-20 ◽  
Author(s):  
Víctor Matamoros ◽  
Diana Calderón-Preciado ◽  
Carmen Domínguez ◽  
Josep M. Bayona
Keyword(s):  
Organic Contaminants ◽  
Plant Material ◽  
Emerging Organic Contaminants ◽  
Analytical Procedures
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