Adsorption of atrazine by natural organic matter and surfactant dispersed carbon nanotubes

Shi, Baoyou; Zhuang, Xinhua; Yan, Xiaomin; Lu, Jingyu; Tang, Hongxiao

doi:10.1016/s1001-0742(09)60238-2

Cited by 46 publications

(8 citation statements)

References 28 publications

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“…Lignin was depicted to act as an anti-static agent. In addition, MWNTs and SWNTs were surface modied 164 with humic acids HA 55 {the major organic constituents of soil (humus), peat, coal, many upland streams, dystrophic lakes, and ocean water} from different sources and with surfactants of different ionic types. Both humic acid and surfactant could effectively disperse MWNTs, but not SWNTs, into stable suspensions under the studied conditions.…”

Section: Natural Productsmentioning

confidence: 99%

Dispersion of carbon nanotubes in water and non-aqueous solvents

2013

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Contemporary methods for dispersion of carbon nanotubes in water and non-aqueous media are discussed. Most attention is paid to ultrasonic and plasma techniques and other physical techniques, as well as to the use of surfactants, functionalizing and debundling agents of distinct nature (elemental substances, metal and organic salts, mineral and organic acids, oxides, inorganic and organic peroxides, organic sulfonates, polymers, dyes, natural products, biomolecules, and coordination compounds). Special studies on CNTs solubilization are examined.

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Section: Natural Productsmentioning

confidence: 99%

Dispersion of carbon nanotubes in water and non-aqueous solvents

2013

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“…Various polymers,18 metals23,24 and biological molecules25–27 can be grafted to the surface of carboxylated CNTs. While the non-covalent functionalization involves the adsorption of the modified molecules onto the outer surface of the CNTs, the adsorption is carried out by 1) hydrophobic interactions, 2) π–π interactions, 3) electrostatic interactions between ionic adsorbates 28–30…”

Section: Introductionmentioning

confidence: 99%

<p>Grafting of multiwalled carbon nanotubes with pyrazole derivatives: characterization, antimicrobial activity and molecular docking study</p>

Metwally¹,

Saad²,

El-Wahab³

2019

IJN

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IntroductionIt is well known that the grafted multiwalled carbon nanotubes (MWCNTs) have antibacterial activity and lower cytotoxicity. Moreover, pyrazole derivatives have a broad spectrum of biological activity due to their fertile template for many medicinal drugs. On view of these findings we report herein the hybridization between MWCNTs and some pyrazole derivatives as antibacterial agents.Materials and methodsPyrazole and pyrazolone derivatives were grafted onto the surface of carboxylated MWCNTs via the reaction of carboxylated MWCNTs and the diazonium salts of pyrazoles and pyrazolones using mixed acid treatment. The insertion of the pyrazole and pyrazolone moieties was characterized by Fourier transform infrared (FTIR) spectroscopy, energy dispersion spectroscopy, transmission electron microscopy, X-ray diffraction and thermogravimetric (TGA).ResultsThe results indicate that pyrazole and pyrazolone moieties successfully attached on carboxylated MWCNTs surface. The neat pyrazole and pyrazolone derivatives and their corresponding carbon nanotubes were tested against Staphylococcus aureus, Bacillus subtilus, Escherichia coli, and Candida albicans bacteria, and Aspergillusniger fungi. The results showed that the grafted carbon nanotubes of pyrazole and pyrazolone derivatives have better antimicrobial activity than the neat pyrazole and pyrazolone derivatives. The molecular docking studies were performed on the most potent antimicrobial compounds to investigate the existence of the interactions between the most active inhibitors and Farnesyl pyrophosphate synthase (FPPS).ConclusionThe surface of the carboxylated MWCNTs was successfully grafted with some pyrazole derivatives. The antibacterial activity was investigated for the newly synthesized compounds and indicated that the grafted MWCNTs have good antibacterial activity toward some pathogenic types of bacteria.

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“…However, again, the modified CNTs do not always show an improvement in their adsorption capacity compared with the pristine ones. For instance, Shi et al (2010) modified the CNTs with various surfactants i.e., cetyltrimethylammonium bromide, sodium dodecylbenzene sulfonate, and humic acid, and reported that the presence of the surfactants inhibited the adsorption of atrazine onto both SWCNTs and MWCNTs (Table 3). The hydrophilic fraction of the aforementioned surfactant micelles faced in water converts the modified CNTs into more hydrophilic adsorbents, consequently reducing the adsorption of atrazine onto the modified CNTs.…”

Section: Carbon Nanotubes As Adsorbents For Atrazine Removalmentioning

confidence: 99%

“…The inhibitory effects of anionic (sodium dodecylbenzene sulfonate) surfactants were higher than that of cationic (cetyltrimethylammonium bromide) surfactants. Due to lower purity and more oxygen contents, the presence of O-containing functional groups on pristine and modified SWCNTs enhances the adsorption of atrazine, thereby reducing the inhibitory effects, as compared to pristine and modified MWCNTs adsorption (Shi et al, 2010).…”

Section: Carbon Nanotubes As Adsorbents For Atrazine Removalmentioning

confidence: 99%

Adsorptive Removal of Atrazine From Contaminated Water Using Low-Cost Carbonaceous Materials: A Review

et al. 2022

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Extensive utilization of atrazine (estimated consumption of 70,000–90,000 tons per annum globally) to eliminate undesirable weeds has resulted in the accumulation of atrazine and its metabolites (diaminochlorotriazine, deisopropylatrazine, desethylatrazine, and atrazine mercapturate) in surface and groundwater above maximum permissible limits (drinking water: 3 μg L−1 in the United States, 0.1 μg L−1 in Europe, and 3.0 μg L−1 by the WHO). Atrazine exhibited no to low degradation in aquatic environments; however, poor degradation in soil yields toxic metabolites, which serve as sinks for groundwater resources. Due to mobility, atrazine and its metabolites can persist in various environmental matrices for decades without degradation, posing a serious threat to ecosystem sustainability and, thus, being removed from water resources. Majority of conventional wastewater treatment technologies are either expensive or inefficient. The carbonaceous materials such as activated carbon, biochar, carbon nanotubes, and graphene have been employed as potent adsorbents for the efficient removal of atrazine along with its metabolites from wastewater. Thus, the efficacy of the aforementioned carbonaceous adsorbents for atrazine removal has been discussed in this article by reviewing 161 published articles. The literature survey demonstrated the highest atrazine adsorption capacity of activated carbons (13.95–712.10 mg g−1), followed by biochar (4.55–409.84 mg g−1) and carbon nanotubes (28.21–110.80 mg g−1). Atrazine adsorption onto the carbonaceous adsorbents is a complex process involving single or multiple mechanisms, such as hydrogen bonding, electrostatic interactions, van der Waals forces, hydrophobic interactions, π-π electron donor–acceptor interactions, pore filling, and partitioning. It is recommended that monitoring of atrazine and its metabolites in water resources and their impacts on human and animal lives be explored. Furthermore, modification of carbon-based adsorbents with chemical, mechanical, and thermal means, as well as development of hybrid systems, may completely remove the prevailing atrazine and its metabolites from world water resources.

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Adsorption of atrazine by natural organic matter and surfactant dispersed carbon nanotubes

Cited by 46 publications

References 28 publications

Dispersion of carbon nanotubes in water and non-aqueous solvents

Dispersion of carbon nanotubes in water and non-aqueous solvents

<p>Grafting of multiwalled carbon nanotubes with pyrazole derivatives: characterization, antimicrobial activity and molecular docking study</p>

Adsorptive Removal of Atrazine From Contaminated Water Using Low-Cost Carbonaceous Materials: A Review

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