scholarly journals Direct Potentiometric Study of Cationic and Nonionic Surfactants in Disinfectants and Personal Care Products by New Surfactant Sensor Based on 1,3-Dihexadecyl−1H-benzo[d]imidazol−3-ium

Molecules ◽  
2021 ◽  
Vol 26 (5) ◽  
pp. 1366
Author(s):  
Nikola Sakač ◽  
Dean Marković ◽  
Bojan Šarkanj ◽  
Dubravka Madunić-Čačić ◽  
Krunoslav Hajdek ◽  
...  
Keyword(s):  
Nonionic Surfactant ◽  
Cationic Surfactant ◽  
Cationic Surfactants ◽  
Nonionic Surfactants ◽  
Limit Of Detection ◽  
Personal Care Products ◽  
Negative Influence ◽  
Ion Pair ◽  
Personal Care ◽  
Two Phase

A novel, simple, low-cost, and user-friendly potentiometric surfactant sensor based on the new 1,3-dihexadecyl−1H-benzo[d]imidazol−3-ium-tetraphenylborate (DHBI–TPB) ion-pair for the detection of cationic surfactants in personal care products and disinfectants is presented here. The new cationic surfactant DHBI-Br was successfully synthesized and characterized by nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) spectrometry, liquid chromatography–mass spectrometry (LC–MS) and elemental analysis and was further employed for DHBI–TPB ion-pair preparation. The sensor gave excellent response characteristics for CTAB, CPC and Hyamine with a Nernstian slope (57.1 to 59.1 mV/decade) whereas the lowest limit of detection (LOD) value was measured for CTAB (0.3 × 10−6 M). The sensor exhibited a fast dynamic response to dodecyl sulfate (DDS) and TPB. High sensor performances stayed intact regardless of the employment of inorganic and organic cations and in a broad pH range (2−11). Titration of cationic and etoxylated (EO)-nonionic surfactant (NSs) (in Ba2+) mixtures with TPB revealed the first inflexion point for a cationic surfactant and the second for an EO-nonionic surfactant. The increased concentration of EO-nonionic surfactants and the number of EO groups had a negative influence on titration curves and signal change. The sensor was successfully applied for the quantification of technical-grade cationic surfactants and in 12 personal care products and disinfectants. The results showed good agreement with the measurements obtained by a commercial surfactant sensor and by a two-phase titration. A good recovery for the standard addition method (98–102%) was observed.

scholarly journals Effect of O3 Dose on the O3/UV Treatment Process for the Removal of Pharmaceuticals and Personal Care Products in Secondary Effluent

2019 ◽  
Vol 3 (2) ◽  
pp. 53 ◽  
Author(s):  
N. Evelin Paucar ◽  
IIho Kim ◽  
Hiroaki Tanaka ◽  
Chikashi Sato
Keyword(s):  
Municipal Wastewater ◽  
Treatment Process ◽  
Limit Of Detection ◽  
Personal Care Products ◽  
Treatment Plant ◽  
Pilot Scale ◽  
Secondary Effluent ◽  
Municipal Wastewater Treatment ◽  
Personal Care ◽  
Uv Treatment

A municipal wastewater treatment plant (WWTP) is a melting pot of numerous pharmaceuticals and personal care products (PPCPs) together with many other substances. The removal of PPCPs using advanced oxidation processes within a WWTP is one way to reduce the amount of PPCPs that potentially enter an aquatic environment. The aim of this study was to examine the effectiveness of the ozone (O3)/UV treatment process, especially, the effects of O3 dose and reaction time, on the removal of PPCPs in the secondary effluent of a WWTP. Experiments were conducted using a pilot-scale treatment process that consisted of two flow-through reactors connected in series. Each reactor was equipped with three 65 W lamps (UV65W). The experimental variables were ozone dosage (1, 2, 3, 4, and 6 mg L−1) and hydraulic retention time (HRT; 5 and 10 min). On the basis of the PPCP concentrations after O3/UV65W treatment and their limit of detection (LOD), 38 PPCPs detected in the secondary effluent were classified into 5 groups ranging from the category of “sensitive” to O3/UV65W or “unstable” in the O3/UV65W process to the category of “insensitive” to O3/UV65W or “very stable” in the O3/UV65W process.

scholarly journals Modification of Bentonite with Cationic and Nonionic Surfactants: Structural and Textural Features

Materials ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 3772 ◽  
Author(s):  
Magdalena Andrunik ◽  
Tomasz Bajda
Keyword(s):  
Specific Surface ◽  
Nonionic Surfactant ◽  
Surface Area ◽  
Clay Minerals ◽  
Cationic Surfactant ◽  
Specific Surface Area ◽  
Nonionic Surfactants ◽  
Inorganic Compounds ◽  
Infrared Spectrometry ◽  
Modification Process

Surfactant-modified clay minerals are known for their good sorption properties of both organic and inorganic compounds from aqueous solutions. However, the current knowledge regarding the effect of both cationic and nonionic surfactants on the properties of bentonite is still insufficient. Bentonite, with montmorillonite as the base clay, was modified with hexadecethyltrimethylammonium bromide (a cationic surfactant) in the amount of 1.0 cation exchange capacity (CEC) of bentonite and varying concentrations of t-octylphenoxypolyethoxyethanol (Triton X-100, a nonionic surfactant). We aimed to improve the understanding of the effect of nonionic and cationic surfactants on clay minerals. The modified bentonites were characterized by X-ray diffraction (XRD), thermogravimetric analysis/differential thermal analysis (TG/DTA), Fourier transform infrared spectrometry (FTIR), field emission scanning electron microscopy (SEM) and specific surface area and pore volume (BET). According to our results, the presence of a cationic surfactant significantly increased the amount of the adsorbed nonionic surfactant. Moreover, an increase in the concentration of nonionic surfactants is also associated with an increase in the effectiveness of the modification process. Our results indicate that the amount of nonionic surfactant used has a significant effect on the properties of the obtained hybrid material. Modification of bentonite with a nonionic surfactant did not cause an expansion of the interlayer space of smectite, regardless of the presence of a cationic surfactant. The modification process was found to significantly decrease the specific surface area of bentonite. Improvement of hydrophobic properties and thermal stability was also observed.

scholarly journals The rheological characteristics for the mixtures of cationic surfactant and anionic–nonionic surfactants: the role of ethylene oxide moieties

RSC Advances ◽  
2017 ◽  
Vol 7 (22) ◽  
pp. 13032-13040 ◽  
Author(s):  
Liming Zhang ◽  
Wanli Kang ◽  
Derong Xu ◽  
Haishun Feng ◽  
Pengyi Zhang ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Cationic Surfactant ◽  
Self Assembly ◽  
Cationic Surfactants ◽  
Nonionic Surfactants ◽  
Rheological Characteristics

Ethylene oxide moieties in various numbers regulate the rheological characteristics of anionic–nonionic/cationic surfactants solutions by affecting the molecular self-assembly.

Effect of Sales Promotions on Consumer Purchase Behavior with Reference to Personal Care Products

2012 ◽  
Vol 2 (10) ◽  
pp. 1-2
Author(s):  
D. Muthukrishnaveni D. Muthukrishnaveni ◽  
◽  
Dr. D. Muruganandam Dr. D. Muruganandam
Keyword(s):  
Personal Care Products ◽  
Purchase Behavior ◽  
Personal Care ◽  
Sales Promotions
Sign in / Sign up

Export Citation Format

Share Document