Real-time analysis of atrazine biodegradation and sessile bacterial growth: A quartz crystal microbalance with dissipation monitoring study

LeviRam, Inbar; Gross, Amit; McCarthy, David Thomas; Herzberg, Moshe

doi:10.1016/j.chemosphere.2019.03.054

Cited by 5 publications

(3 citation statements)

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“…RO membrane fouling and the efficacy of cleaning are strongly affected by fouling-layer viscoelastic properties. ,, Accordingly, we attempted to determine whether fouling layer rigidity differed among the different fractions that accumulate on the RO active layer on the QCM-D sensor. The rigidity of the fouling layer is characterized by the slope (ratio) of the relationship between dissipation shift, Δ D , and frequency shift, Δ f , acquired during adsorption of the foulant to the surface. ,,, A low Δ D /Δ F ratio indicates the formation of a dense, compact, and rigid layer, whereas a higher value indicates a fluidic, dissipative layer Figure shows the Δ D /Δ F ratios acquired at the end of the adsorption stage, when a stable fouling layer had formed on the QCM-D sensor (Figure c).…”

Section: Resultsmentioning

confidence: 99%

“…The rigidity of the fouling layer is characterized by the slope (ratio) of the relationship between dissipation shift, ΔD, and frequency shift, Δf, acquired during adsorption of the foulant to the surface. 43,45,69,70 A low ΔD/ ΔF ratio indicates the formation of a dense, compact, and rigid layer, whereas a higher value indicates a fluidic, dissipative layer. 71 Figure 3 shows the ΔD/ΔF ratios acquired at the end of the adsorption stage, when a stable fouling layer had formed on the QCM-D sensor (Figure 2c).…”

Section: Resultsmentioning

confidence: 99%

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Fouling of Reverse Osmosis Membrane with Effluent Organic Matter: Componential Role of Hydrophobicity

et al. 2023

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Organic matter dissolved in tertiary effluents (effluent organic matter, EfOM) is the predominant organic membrane foulant in tertiary wastewater reverse osmosis (RO) desalination, ultimately causing biofouling. The interrelated effects of EfOM fractions of different hydrophobicity and polarity on membrane performance were studied by (i) examining each fraction's overall effect on membrane permeability; (ii) analyzing the intrinsic hydraulic resistance induced by each fraction; (iii) studying their adsorption on the active layer of an RO membrane using a quartz crystal microbalance with dissipation monitoring (QCM-D); (iv) assessing their "dry" molecular mass when adsorbed on polyamide using localized surface plasmon resonance (LSPR) sensing; (v) analyzing their hydrodynamic radii by dynamic light scattering (DLS); and (vi) characterization using excitation− emission matrix (EEM) analysis and parallel-factor (PARAFAC) modeling. Hydrophobic and transphilic neutral fractions (containing ∼12.5% total organic carbon) have the greatest effect on membrane flux reduction and the highest hydraulic resistance and adhere most strongly to polyamide surfaces, resulting in the highest adsorbed "dry" mass. Therefore, in terms of their effect on RO permeate flux reduction, these fractions are the most detrimental in the EfOM mix. EEM analysis and associated PARAFAC modeling indicate that the main components causing this effect are mixtures of protein-like compounds, together with humic-like substances. Novel LSPR-based analysis elucidated the role of the fractions most detrimental to membrane permeability through measurement of dry mass surface concentration on a polyamide mimetic sensor. This study provides valuable insights into the roles of different EfOM fractions in RO membrane fouling and enhances our understanding of fouling during tertiary wastewater desalination.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Fouling of Reverse Osmosis Membrane with Effluent Organic Matter: Componential Role of Hydrophobicity

et al. 2023

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“…LeviRam, Gross, McCarthy, and Herzberg (2019) employed a technique of Quartz Crystal Microbalance with Dissipation for monitoring of atrazine‐degrading bacteria on to the surface, atrazine adsorption, and degradation. Besides, the study was also considered the consequent proliferation of the irreversibly attached sessile bacteria.…”

Section: Toxicologymentioning

confidence: 99%

Pesticides and herbicides

Choudri

Charabi

Al‐Nasiri

et al. 2020

Water Environment Research

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This paper highlights a review of scientific papers published in the year 2019 regarding pesticides and herbicides. The scientific review presented in this paper includes the presence and occurrence of pesticides and herbicides in the environment. The entire review divided into different sections, which are grouped into four main sections. Each of these sections provides studies conducted on toxicology, ecological risk assessment, strategies of treatment, policies, modeling, and guidelines regarding pesticides and herbicides management.

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Engineering a biofilters microbiome with activated carbon and bioaugmentation to improve stormwater micropollutant removal

LeviRam,

Gross,

Lintern

et al. 2023

Environmental Technology & Innovation

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Real-time analysis of atrazine biodegradation and sessile bacterial growth: A quartz crystal microbalance with dissipation monitoring study

Cited by 5 publications

References 54 publications

Fouling of Reverse Osmosis Membrane with Effluent Organic Matter: Componential Role of Hydrophobicity

Fouling of Reverse Osmosis Membrane with Effluent Organic Matter: Componential Role of Hydrophobicity

Pesticides and herbicides

Engineering a biofilters microbiome with activated carbon and bioaugmentation to improve stormwater micropollutant removal

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