Surface adsorption of natural organic matter on engineered nanoparticles

2018 ◽  
Author(s):  
Sanjaya Dilantha Jayalath Mudiyanselage
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Surface Adsorption ◽  
Engineered Nanoparticles

Coating ligands mediated dynamic formation of natural organic matter (NOM) corona on engineered nanoparticles in environments

2021 ◽  
Author(s):  
Chuan-Wang Yang ◽  
Li Yuan ◽  
Hong-Zhi Zhou ◽  
Xin Zhang ◽  
Guo-Ping Sheng
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Engineered Nanoparticles ◽  
Aquatic Systems ◽  
Solution Interface ◽  
Dynamic Formation

Natural organic matter (NOM) can adsorb onto engineered nanoparticles (ENPs) and form NOM-corona on ENPs-solution interface, thus affecting the performance and ecotoxicity of ENPs in aquatic systems. Nevertheless, the formation...

scholarly journals Surface adsorption of Nordic aquatic fulvic acid on amine-functionalized and non-functionalized mesoporous silica nanoparticles

2018 ◽  
Vol 5 (9) ◽  
pp. 2162-2171 ◽  
Author(s):  
Sanjaya Jayalath ◽  
Sarah C. Larsen ◽  
Vicki H. Grassian
Keyword(s):  
Organic Matter ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Fulvic Acid ◽  
Natural Organic Matter ◽  
Mesoporous Silica Nanoparticles ◽  
Surface Adsorption ◽  
Functionalized Mesoporous Silica ◽  
Amine Functionalized

Mesoporous silica nanoparticles (MSNs) have the potential to be released into the environment and to then adsorb natural organic matter.

scholarly journals Behavior of TiO2 and CeO2 Nanoparticles and Polystyrene Nanoplastics in Bottled Mineral, Drinking and Lake Geneva Waters. Impact of Water Hardness and Natural Organic Matter on Nanoparticle Surface Properties and Aggregation

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 721 ◽  
Author(s):  
Lina Ramirez ◽  
Stephan Ramseier Gentile ◽  
Stéphane Zimmermann ◽  
Serge Stoll
Keyword(s):  
Drinking Water ◽  
Organic Matter ◽  
Natural Organic Matter ◽  
Drinking Water Treatment ◽  
Water Hardness ◽  
Engineered Nanoparticles ◽  
Mineral Waters ◽  
Lake Geneva ◽  
Water Treatment Process ◽  
The Impact

Intensive use of engineered nanoparticles (NPs) in daily products ineluctably results in their release into aquatic systems and consequently into drinking water resources. Therefore, understanding NPs behavior in various waters from naturel to mineral waters is crucial for risk assessment evaluation and the efficient removal of NPs during the drinking water treatment process. In this study, the impact of relevant physicochemical parameters, such as pH, water hardness, and presence of natural organic matter (NOM) on the surface charge properties and aggregation abilities of both NPs and nanoplastic particles is investigated. TiO2, CeO2, and Polystyrene (PS) nanoplastics are selected, owing to their large number applications and contrasting characteristics at environmental pH. Experiments are performed in different water samples, including, ultrapure water, three bottled mineral waters, Lake Geneva, and drinking water produced from Lake Geneva. Our findings demonstrate that both water hardness and negatively charged natural organic matter concentrations, which were measured via dissolved organic carbon determination, are playing important roles. At environmental pH, when negatively charged nanoparticles are considered, specific cation adsorption is promoting aggregation so long as NOM concentration is limited. On the other hand, NOM adsorption is expected to be a key process in NPs destabilization when positively charged PS nanoplastics are considered.

Adsorption of a Homologous Series of Alkylbenzenes to Mineral Oxides at Low Organic Carbon Content Using Headspace Analysis

1990 ◽  
Vol 22 (6) ◽  
pp. 7-14 ◽  
Author(s):  
Judith A. Perlinger ◽  
Steven J. Eisenreich ◽  
Paul D. Capel ◽  
Peter W. Carr ◽  
Jung Hag Park
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Homologous Series ◽  
Surface Adsorption ◽  
Headspace Analysis ◽  
Organic Carbon Content ◽  
Batch Experiments ◽  
Closed Vessel ◽  
Mineral Oxides ◽  
Headspace Concentration

A homologous series of alkylbenzenes was sorbed to well-characterized mineral oxides in batch experiments to elucidate mechanisms of sorption in the absence of natural organic matter. Sorbed concentration was determined by measuring the headspace concentration in a closed vessel partially filled with a water/alkylbenzene/solid slurry. Partitioning of dissolved alkylbenzenes to sorbed alkylbenzenes was observed at high sorbed concentrations. At low sorbed concentrations, the mechanism was surface adsorption limited by the surface area of the solids. Enhancement of the adsorption of individual compounds was observed when alkylbenzenes were sorbed as a mixture.

Agglomeration and dissolution of zinc oxide nanoparticles: role of pH, ionic strength and fulvic acid

2013 ◽  
Vol 10 (4) ◽  
pp. 306 ◽  
Author(s):  
Rute F. Domingos ◽  
Zohreh Rafiei ◽  
Carlos E. Monteiro ◽  
Mohammad A.K. Khan ◽  
Kevin J. Wilkinson
Keyword(s):  
Organic Matter ◽  
Ionic Strength ◽  
Fulvic Acid ◽  
Natural Organic Matter ◽  
Organic Matter Content ◽  
Engineered Nanoparticles ◽  
Colloidal System ◽  
Nominal Size ◽  
Mass Ratios

Environmental context The number of nano-enabled products reaching consumers is growing exponentially, inevitably resulting in their release to the environment. The environmental fate and mobility of nanomaterials will depend on their physicochemical form(s) under natural conditions. For ZnO nanoparticles, determinations of agglomeration and dissolution under environmentally relevant conditions of pH, ionic strength and natural organic matter content will provide insight into the potential environmental risk of these novel products. Abstract The increasing use of engineered nanoparticles (ENPs) in industrial and household applications has led to their release into the environment and increasing concern about their effects. Proper assessment of the ecological risks of ENPs will require data on their bioavailability, persistence and mobility over a broad range of physicochemical conditions, including environmentally relevant pH, ionic strength and concentrations of natural organic matter (NOM). In this study, fluorescence correlation spectroscopy was used to determine the agglomeration of a ZnO ENP (nZnO) with a nominal size of 20nm. Particle dissolution was followed using scanned stripping chronopotentiometry. The effects of Suwannee River fulvic acid (SRFA, 0–60mgL–1) and the roles of pH (4–10) and ionic strength (0.005–0.1M) were carefully evaluated. Agglomeration of the bare nZnO increased for pH values near the zero point of charge, whereas the dissolution of the particles decreased. At any given pH, an increase in ionic strength generally resulted in a less stable colloidal system. The role of SRFA was highly dependent upon its concentration with increased agglomeration observed at low SRFA : nZnO mass ratios and decreased agglomeration observed at higher SRFA : nZnO mass ratios. The results indicated that in natural systems, both nZnO dispersion and dissolution will be important and highly dependent upon the precise conditions of pH and ionic strength.

scholarly journals The Removal of CuO Nanoparticles from Water by Conventional Treatment C/F/S: The Effect of pH and Natural Organic Matter

Molecules ◽  
2019 ◽  
Vol 24 (5) ◽  
pp. 914 ◽  
Author(s):  
Rizwan Khan ◽  
Muhammad Ali Inam ◽  
Du Ri Park ◽  
Sarfaraz Khan ◽  
Muhammad Akram ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Colloidal Stability ◽  
Copper Oxide Nanoparticles ◽  
Engineered Nanoparticles ◽  
Cuo Nps ◽  
Effects Of Ph ◽  
Alkaline Conditions ◽  
Ft Ir ◽  
The Fourier Transform

The increased use of engineered nanoparticles (ENPs), such as copper oxide nanoparticles (CuO NPs), in commercial products and applications raises concern regarding their possible release into freshwater sources. Therefore, their removal from water is important to eliminate adverse environmental and human health effects. In this study, the effects of pH and natural organic matter (NOM), i.e., humic acid (HA) and salicylic acid (SA) on the removal of CuO NPs by coagulation/flocculation/sedimentation (C/F/S) were evaluated. The results indicated that pH significantly affects the coagulation efficiency, where 10–60% CuO NPs removal was achieved under extreme acidic/alkaline conditions. However, at neutral pH, removal of up to 90% was observed with a lower ferric chloride (FC) dosage (0.2 mM). The coagulation efficiency and mechanism were strongly affected by the type of Fe species present in the aqueous phase, which is mainly controlled by pH. Higher concentrations of both HA and SA decrease the CuO NPs agglomeration rate, and thereby improve the colloidal stability due to the NOM molecules adsorbed onto the NPs surface. The presence of hydrophobic HA needs a higher FC dosage of 0.5–0.8 mM than a dosage of hydrophilic SA of 0.25–0.35 mM, to obtain a similar CuO coagulation efficiency. Moreover, higher removals of dissolved organic carbon (DOC) and UV254 were observed more in hydrophobic NOM than in hydrophilic. The results of the Fourier transform infrared (FT-IR) analysis of FC composite flocs confirm that the charge neutralization and enmeshment of coagulant might be a possible removal mechanism. The findings of the current study may provide critical information in the prediction of the fate, mobility, and removal of CuO NPs during C/F/S in water treatment.

Direct and Indirect Toxic Effects of Engineered Nanoparticles on Algae: Role of Natural Organic Matter

2013 ◽  
Vol 1 (7) ◽  
pp. 686-702 ◽  
Author(s):  
Antonietta Quigg ◽  
Wei-Chun Chin ◽  
Chi-Shuo Chen ◽  
Saijin Zhang ◽  
Yuelu Jiang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Engineered Nanoparticles ◽  
Toxic Effects

Characterization of dissolved organic matter (DOM) extracted from soils by hot water percolation (HWP)

2010 ◽  
Vol 59 (1) ◽  
pp. 99-108 ◽  
Author(s):  
M. Takács ◽  
Gy. Füleky
Keyword(s):  
Organic Matter ◽  
Humic Acid ◽  
Natural Organic Matter ◽  
Extraction Methods ◽  
Soil Samples ◽  
Hot Water ◽  
Soil Extracts ◽  
Water Percolation ◽  
Soil Humic Acid

The Hot Water Percolation (HWP) technique for preparing soil extracts has several advantages: it is easily carried out, fast, and several parameters can be measured from the same solution. The object of this study was to examine the possible use of HWP extracts for the characterization of soil organic matter. The HPLC-SEC chromatograms, UV-VIS and fluorescence properties of the HWP extracts were studied and the results were compared with those of the International Humic Substances Society (IHSS) Soil Humic Acid (HA), IHSS Soil Fulvic Acid (FA) and IHSS Suwannee Natural Organic Matter (NOM) standards as well as their HA counterparts isolated by traditional extraction methods from the original soil samples. The DOM of the HWP solution is probably a mixture of organic materials, which have some characteristics similar to the Soil FA fractions and NOM. The HWP extracted organic material can be studied and characterized using simple techniques, like UV-VIS and fluorescence spectroscopy.

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