Risk assessment of a municipal extended aeration activated sludge treatment plant using physico-chemical and in vitro bioassay analyses

Gupta, Asmita; Kumar, Madan; Ghosh, Pooja; Swati, Swati; Thakur, Indu Shekhar

doi:10.1016/j.eti.2021.102254

Cited by 10 publications

(5 citation statements)

References 35 publications

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“…The highest peak at around 1350 cm -1 corresponds to cyclononasiloxane, octadecamethyl and tetracosamethyl-cyclododecasiloxane and its respective adsorption functional groups molecule of CH 3 -Si-O-on the substrate. The author of [35] verifies the high solubility of tetracosamethyl-cyclododecasiloxane (R-COO-R', an ester functional group) in water and enriches the LS inhibitor's "green" concept to reduce the adverse environmental effect upon inhibitor disposal. The identified peak of oxygen-free functional groups at 1450 and 1595 cm -1 attributes with CH 3 -CH 2 deformation and >CH 2 at 2880 cm -1 .…”

Section: The Results Of Actual Func Tional Groups Characterization Re...mentioning

confidence: 98%

Unraveling the study of liquid smoke from rice husks as a green corrosion inhibitor in mild steel under 1 M HCl

Kaban

Mayangsari

Anwar

et al. 2022

EEJET

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The work provides the more comprehensive development of Liquid Smoke from Rice Husks Ash (RHA). Notably, the study focuses on the interaction between the primary molecules of inhibitor and mild steel, including thermodynamic calculation and surface treatment upon addition of inhibitor. The electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PP) characterization were utilized to evaluate the anticorrosion of RHA. The Raman Spectroscopy pre and post-addition of RHA’s inhibitor were used to compare the adsorbed functional group of inhibitors. Moreover, the thermodynamic calculation of the inhibitor’s adsorption determines the types of adsorption of the inhibitor. As a result of the adsorption process, the Scanning Electronic Microscope-Energy Dispersive X-Ray (SEM-EDX) aided by The Atomic Force Microscopy (AFM) and Contact Angle Test was implemented to unveil the surface treatment and the change of elemental composition after the addition of an 80 ppm inhibitor. The PP and EIS results show a significant depression of the current density at ‒2.75 μA·cm2 in 80 ppm solution with the highest inhibition efficiency of 99.82 %. The superior inhibition correlates to the adsorption of Si–OH, C–C, C–O–C, >C=O, complex structure, and –OH at wavenumber 458, 662, 1095, 1780, and 3530 cm-1. The LS shows a significant surface area of protection of 0.9982 and high adsorption constant (Kads) at 11.648. The calculated ΔGads of ‒6.59 kJ/mol unveils the chemisorption in nature. At the same time, a combination of 20 and 80 ppm solution is predicted adsorbed horizontally to reduce the contact between the solution and substrate, as shown in SEM and AFM results. It also increases the contact angle and their corresponding hydrophobicity

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Section: The Results Of Actual Func Tional Groups Characterization Re...mentioning

confidence: 98%

Unraveling the study of liquid smoke from rice husks as a green corrosion inhibitor in mild steel under 1 M HCl

Kaban

Mayangsari

Anwar

et al. 2022

EEJET

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“…It can be seen from Figure 5 that the OTMs of the six wastewater samples were significantly higher than those of the control, indicating that each sample caused significant DNA damage to the E. gracilis [ 34 , 35 , 36 ]. Similarly, the study found, using the Comet assay, that organic extracts from Taihu Lake can induce DNA damage on microalgae cells [ 37 , 38 , 39 ]. The genotoxicity of the wastewater samples was J > T > W, and the effluents showed decreases in genotoxicity by 41.06%, 36.12% and 37.15%, respectively.…”

Section: Resultsmentioning

confidence: 99%

Using a Battery of Bioassays to Assess the Toxicity of Wastewater Treatment Plant Effluents in Industrial Parks

Yang

Cui

Gao

et al. 2023

Toxics

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Bioassays, as an addition to physico-chemical water quality evaluation, can provide information on the toxic effects of pollutants present in the water. In this study, a broad evaluation of environmental health risks from industrial wastewater along the Yangtze River, China, was conducted using a battery of bioassays. Toxicity tests showed that the wastewater treatment processes were effective at lowering acetylcholinesterase (AChE) inhibition, HepG2 cells’ cytotoxicity, the estrogenic effect in T47D-Kbluc cells, DNA damage of Euglena gracilis and the mutagenicity of Salmonella typhimurium in the analyzed wastewater samples. Polycyclic aromatic hydrocarbons (PAHs) were identified as potential major toxic chemicals of concern in the wastewater samples of W, J and T wastewater treatment plants; thus, the potential harm of PAHs to aquatic organisms has been investigated. Based on the health risk assessment model, the risk index of wastewater from the industrial parks along the Yangtze River was below one, indicating that the PAHs were less harmful to human health through skin contact or respiratory exposure. Overall, the biological toxicity tests used in this study provide a good basis for the health risk assessment of industrial wastewater and a scientific reference for the optimization and operation of the treatment process.

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“…The hazards related to biosolids exposures, including those related to land application, have generally been studied with in vitro or in vivo (including both animal and plant) bioassays, ,− but these approaches do not provide compound-specific data. Most of these studies also performed a targeted analysis of organic contaminants present in biosolids, ,,, but the chosen compounds may not necessarily be those responsible for observed effects. In contrast, the implementation of nontargeted and suspect screening approaches can detect a broader range of compounds in a sample, but not all may be of toxicological concern.…”

Section: Environmental Implicationsmentioning

confidence: 99%

Combining Nontargeted Analysis with Computer-Based Hazard Comparison Approaches to Support Prioritization of Unregulated Organic Contaminants in Biosolids

Newmeyer,

Lyu,

Sobus

et al. 2024

Environ. Sci. Technol.

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Risk assessment of a municipal extended aeration activated sludge treatment plant using physico-chemical and in vitro bioassay analyses

Cited by 10 publications

References 35 publications

Unraveling the study of liquid smoke from rice husks as a green corrosion inhibitor in mild steel under 1 M HCl

Unraveling the study of liquid smoke from rice husks as a green corrosion inhibitor in mild steel under 1 M HCl

Using a Battery of Bioassays to Assess the Toxicity of Wastewater Treatment Plant Effluents in Industrial Parks

Combining Nontargeted Analysis with Computer-Based Hazard Comparison Approaches to Support Prioritization of Unregulated Organic Contaminants in Biosolids

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