Silica gel adsorption, strong base anion exchange IRA 400-OH form resin were evaluated for the treatment of trihalomethane precursors present in raw and drinking water. A powdered silica gel having 60 to 120 mesh size and a previously dried IRA 400-OH form resin having 20-50 mesh size have been applied to artificial water samples and a specific analytical approach was used for selective removal of humic acid present in the water. This study aims to evaluate the role of contact time, pH, adsorption dose, concentration of humic acid (H.A.), flow rate on the reduction of THM-precursors as a result of adsorption of H.A. while passing raw water through silica gel and IRA 400 OH form resin column. Freundlich adsorption isotherm constants K for silica gel and IRA 400-OH form resin were determined as 1.13 x 10(-3) and 4.2 x 10(-3) mg/g respectively and l/n were found to be 0.9927 and 1.069 respectively.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
A suitable solvent for adsorption of poorly water-soluble substances onto silica gel in a ready biodegradability test.
J Pestic Sci
November 2024
Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University.
When a test substance is poorly water-soluble, it can be adsorbed onto silica gel to facilitate dispersibility in a ready biodegradability test. To uniformly adsorb the test substance onto silica gel, the substance is dissolved in a solvent and then mixed with the silica gel. It is desirable for the solvent to completely evaporate afterward.
View Article and Find Full Text PDFMicrofluidic-assisted sol-gel preparation of monodisperse mesoporous silica microspheres with controlled size, surface morphology, porosity and stiffness.
Nanoscale
January 2025
National Engineering Research Center for Colloidal Materials, School of Chemistry & Chemical Engineering, Shandong University, Jinan 250100, P. R. China.
The controllable synthesis of monodisperse mesoporous silica microspheres with unique physicochemical properties is becoming increasingly important for a variety of applications such as catalysts, chromatography, drug delivery and sensors. Here, we report a facile microfluidic-assisted sol-gel method for the preparation of silica microspheres with precisely controlled properties such as the size of the microspheres, the surface morphology, porosity and stiffness. All these properties can be manipulated by changing specific synthesis parameters, such as changing the microfluidic channels to tune the size of the microdroplets (tens to hundreds of microns), changing the contents of the precursor solution to manipulate the surface morphology (wrinkled to smooth surface) and changing the gelation/annealing conditions to tune the porosity (surface area up to 1021 m g) and stiffness of the microspheres (elastic modulus tunable from 0.
View Article and Find Full Text PDFSequential separation of anti-diabetic drugs in the presence of melamine as impurity using chromatographic methods.
BMC Chem
January 2025
Pharmaceutical Chemistry Department, Faculty of Pharmacy, Nahda University, Sharq El-Nile, Beni-Suef, 62511, Egypt.
The study of green analytical chemistry has garnered significant attention in the context of mitigating global environmental contamination. In this study, we present two methodologies for environmentally friendly chromatography that enable simultaneous and specific determination of Saxagliptin (SAX), metformin (MET), and a pharmacopoeial impurity of MET known as melamine (MEL). The initial method employed in this study is High-Performance Thin Layer Chromatography (HPTLC), which utilized 60 F 254 silica gel-coated Mark HPTLC plates on aluminum sheets as the stationary phase.
View Article and Find Full Text PDFA strategy for selective screening of dual-target bioactive compounds against hypertrophic scar through inhibiting angiotensin II type 1 receptor while stimulating type 2 receptor from Chinese herbs.
Chin Med
January 2025
Key Laboratory of Resource Biology and Biotechnology in Western China, Ministry of Education, College of Life Sciences, Northwest University, Xi'an, 710069, China.
Background: Cutaneous hypertrophic scar is a fibro-proliferative hard-curing disease. Recent studies have proved that antagonists of angiotensin II type 1 receptor (ATR) and agonists of type 2 receptor (ATR) were able to relieve hypertrophic scar. Therefore, establishing new methods to pursue dual-target lead compounds from Chinese herbs is in much demand for treating scar.
View Article and Find Full Text PDFRecent Progress in Curcumin: Extraction, Purification, and Bioactivity.
Curr Med Chem
January 2025
School of Pharmacy, Changzhou University, Changzhou, 213164, China.
Curcumin is a natural plant pigment that has been widely used in food production, drug development, and textile engineering. Gaining a deep understanding of the biological activities of curcumin and obtaining high-purity curcumin are of vital importance for basic research and applications of curcumin. In this review, we summarize recent advances in curcumin, mainly focusing on the methods of extracting and purifying curcumin from turmeric as well as applications based on biological activity.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!