1. Adsorption Isotherm, Thermodynamics of Copper, Lead and Cadmium Onto Mukurweini’S Kaolinite and Alkali Modified Kaolinte

   Makani Bungishabaku Rache^1,a, Patrick Kimutai Tum^2,a, Njomo Njagi^3,a, Nyabaro Obed Mainya^4,b

   a. Department of Chemistry, Faculty of Science and Technology, University of Nairobi P.O. Box 30197-00100, Nairobi-Kenya.
   b. Department of Chemistry, School of Pure and Applied Sciences, Kisii University, P.O. Box 408-40200 Kisii-Kenya.

   Abstract: Water supply in Kenya has been defined as being scarce due to multiple causes that include droughts, forest degradation, population growth, and insufficient water supply management. The main freshwater resources include groundwater, water basins, dams, rivers, lakes, swamps, and springs. These water crises have necessitated the invention of cost-effective water treatment methods. The adsorption study was done using seven different adsorbents (S1, S2, S3, S4, S5, S6, and S7) and five different adsorbates (Nitrate, Phosphate, lead, Cadmium and Copper). Nitrate and Phosphate adsorption study was done using UV-Vis Spectrometry and Lead, Copper and Cadmium using Atomic Absorption Spectroscopy. Adsorption Isotherm parameter was examined through the potential application of clay-derived zeolites derived from clay material (kaolinite) obtained from Mukurweini in Nyeri County to remedy water contaminated with agricultural waste. It was observed that the adsorbents S1, S2, S3, S4, S5 and S6 had similar behavior throughout the adsorption study.

   Key Words: Absorbents, zeolites, kaolinite, silicates, Isotherms

   Pages: 23 – 29 | Full PDF Paper

2. Production of Memory and Functional Elastic Film with Blown Production Technology

   Ilker Türkmen*¹, Ali Cicek², Omer Faruk Simsek³, Akif Dik⁴

   Lidersan Saglik ve Gida Urunleri A.S., Research and Development Center, 27500, Gaziantep, Türkiye.
   

   Abstract: Elastic films are the name given to thin material layers (films) that are flexible, stretchable and have a memory structure. Such films are made of elastomer-based polymers and have the ability to return to their original form due to their high memory. These features make them useful in a wide variety of applications. Diapers are a complex structure formed by the combination of many different components and one of these components is flexible earflaps. Flexible earflaps allow the user to fix the diaper to the body thanks to an elastic film that is ultrasonically laminated between two nw (nonwoven) fabrics. This study; is aimed at the trial studies conducted to approach the standard elastic film performance with the blown film production technique of SEBS (Styrene-Ethylene-Butylene-Styrene) based elastic films, which are not suitable for the blown film production process in the global sense and are produced with the cast film process, and their applications in the flexible earflap component of the baby diaper.

   Key Words: Elastic Film; SEBS; Diaper; Blown Film; Polymer

   Pages: 30 – 44 | Full PDF Paper