Skip to main content

Montmorillonite-silica Nanocomposite for Dye Removal from Solution | Chapter 01 | Advances in Applied Science and Technology Vol. 3

Dyes  are  used  in  various  industries  such  as  pharmaceutical,  cosmetic,  paper,  leather,  food  stuff, plastics, and textile etc. The dye effluents are discharged into environment by either water or land. The discharge of these effluents into the receiving environments results in hazardous health problems as most of these dyes have carcinogenic effects on the living organisms. Congo red was removed on Montmorillonite-silica nanocomposite from solution by adsorption process. The adsorption parameters studied  were adsorbent  dose,  initial  concentration  and  contact  time.  The  optimum  adsorption parameters were found to be 2 mg/L, 1.5 g and 40 minutes for initial concentration, adsorbent dose and  contact  time  respectively  with  removal  percentage  of  84.10%.  Pseudo  first and  second  order kinetics were used for the studies. Pseudo second order best fit the adsorption process with R²= 1 than the Pseudo first order which has R²= 0.933. Experimental data were best fitted by the Langmuir Isotherm  with  R²=0.9024  other  than  the  Freundlich  Isotherm,  R²=0.568.  The  RL  of  0.994  of  the Langmuir  isotherm  shows  the  favourability  of  the  adsorption  process.  The  maximum  adsorption capacity by Langmuir isotherm was found to be 172. 40 mg/g. The adsorption process of Congo red was  carried  out  using  Montmorilonite  silica  nanocomposite.  From  the  experimental  data  the percentage removal of 84.10% obtained at an optimum initial concentration of 2 mg/l, an optimum adsorbent dose of 1.5 g and optimum contact time of 40 minutes. Experimental data were best fitted by the Langmuir Isotherm with R²=0.9024 other than the Freudlich Isotherm, R²=0.568. The pseudo second order kinetic with R²= 1 best fit the adsorption process other than the pseudo second order kinetics,  R²=0.933. Therefore, montmorillonite-silica  nanocomposite  obtained  from montmorillonite clay and Rice husk ash can serve as a cost-effective adsorbent in the removal of Congo red dye.

Author(s) Details

Dr Danbature Wilson Lamayi
Department of Chemistry, Faculty of Science, Gombe State University, Gombe, Nigeria.

Zaccheus Shehu
Department of Chemistry, Faculty of Science, Gombe State University, Gombe, Nigeria.

View Volume:


Popular posts from this blog

Consensus Summit: Lipids and Cardiovascular Health in the Nigerian Population | Chapter 09 | Current Trends in Food Science Vol. 1

Aims: To issue a consensus statement on Lipids and Cardiovascular Health and the impact of their interrelationship in Nigerian Population. Study Design: Experts from a range of relevant disciplines, deliberated on different aspects of Lipids and Cardiovascular Health in the Nigerian Population at a Summit. Place and Duration of Study: The Summit was held in April 2016 at the Nigerian Institute of Medical Research. Methodology: Presentations were made on central themes after which expert participants split into four different groups to consider the questions relevant to different sub themes of the title. Consensus was arrived at, from presentations of groups at plenary. Conclusion: With the increase in the prevalence of NCDs, especially Cardiovascular Disease in Nigeria, and the documented evidence of deleterious effects of lipids, the expert panel called for an urgent need to advocate for the general public and health professionals to make heart-friendly

A Review on Gongronema latifolium, an Extremely Useful Plant with Great Prospects | Chapter 11 | Recent Advances in Biological Research Vol. 3

Gongronema latifolium is a plant that has a wide range of nutritional and ethnomedical uses in different tropical African communities. Scientific reports on the chemical composition and bioactivity (anti-inflammatory, antimicrobial, antidiabetic, antioxidant, anticancer and allelopathic properties) of the plant material by different authors are discussed in this review. Future prospects of the plant extracts in the areas of herbal formulations, food preservation, alcoholic fermentation and beer production, drug discovery and allelopathy are also highlighted. Author   Details: Olugbenga Morebise Faculty of Basic Medical Sciences, All Saints University School of Medicine, Roseau, Commonwealth of Dominica. Read full article: View Volume:

An Overview of Ultrasonic Technology and Its Applications in Food Processing, Preservation and Quality Control | Chapter 03 | Current Research in Science and Technology Vol. 3

Ultrasound is one of the emerging technologies that were developed to minimize processing, maximize quality and ensure the safety of food products. In recent years, ultrasound technology has been used as an alternative processing option to conventional thermal approaches. Although Ultrasonication methods have been used for years in research and diagnostics, major advances have been made in the last decade. The applications for which high power ultrasound can be used range from existing processes that are enhanced by the retrofitting of high power ultrasonic technology, to the development of processes up to now not possible with conventional energy sources. The present paper reviews the generation, principle mechanism, properties, process parameters, applications, merits and demerits and future trends of the ultrasound technology in the food processing. Author(s) Details Er. Bogala Madhu Department of Processing and Food Engineering, College of Technology and Engineering, MP