alexa A simple method for production of pure silica from rice hull ash.


Research & Reviews: Journal of Pure and Applied Physics

Author(s): U Kalapathy, A Proctor, J Shultz

Abstract Share this page

Rice hull ash (RHA), a waste product of the rice industry is rich in silica. A simple method based on alkaline extraction followedby acid precipitation was developed to produce pure silica xerogels from RHA, with minimal mineral contaminants. The silica gelsproduced were heated to 80 o C for 12 h to obtain xerogels. Silica and mineral contents of xerogels were determined by energydispersive X-ray (EDX) and inductively-coupled plasma (ICP) emission spectrometers, respectively. Xerogels produced from RHAhad 93% silica and 2.6% moisture. The major impurities of silica produced from RHA at an extraction yield of 91% were Na, K, andCa. Acid washing prior to extraction resulted in silica with a lower concentration of Ca (<200 ppm). However, ®nal water washingof the xerogel was more eective in producing silica with lower overall mineral content (Na<200 ppm and K<400 ppm). X-raydiraction patterns revealed the amorphous nature of silica xerogel. Fourier transform infrared (FTIR) data indicated the presenceof siloxane and silanol groups. Ó 2000 Elsevier Science Ltd. All rights reserved.

  • To read the full article Visit
  • Subscription
This article was published in Bioresour. Technol and referenced in Research & Reviews: Journal of Pure and Applied Physics

Relevant Expert PPTs

Relevant Speaker PPTs

Recommended Conferences

Relevant Topics

Peer Reviewed Journals
Make the best use of Scientific Research and information from our 700 + peer reviewed, Open Access Journals
International Conferences 2017-18
Meet Inspiring Speakers and Experts at our 3000+ Global Annual Meetings

Contact Us

Agri, Food, Aqua and Veterinary Science Journals

Dr. Krish

1-702-714-7001 Extn: 9040

Clinical and Biochemistry Journals

Datta A

1-702-714-7001Extn: 9037

Business & Management Journals


1-702-714-7001Extn: 9042

Chemical Engineering and Chemistry Journals

Gabriel Shaw

1-702-714-7001 Extn: 9040

Earth & Environmental Sciences

Katie Wilson

1-702-714-7001Extn: 9042

Engineering Journals

James Franklin

1-702-714-7001Extn: 9042

General Science and Health care Journals

Andrea Jason

1-702-714-7001Extn: 9043

Genetics and Molecular Biology Journals

Anna Melissa

1-702-714-7001 Extn: 9006

Immunology & Microbiology Journals

David Gorantl

1-702-714-7001Extn: 9014

Informatics Journals

Stephanie Skinner

1-702-714-7001Extn: 9039

Material Sciences Journals

Rachle Green

1-702-714-7001Extn: 9039

Mathematics and Physics Journals

Jim Willison

1-702-714-7001 Extn: 9042

Medical Journals

Nimmi Anna

1-702-714-7001 Extn: 9038

Neuroscience & Psychology Journals

Nathan T

1-702-714-7001Extn: 9041

Pharmaceutical Sciences Journals

John Behannon

1-702-714-7001Extn: 9007

Social & Political Science Journals

Steve Harry

1-702-714-7001 Extn: 9042

© 2008-2017 OMICS International - Open Access Publisher. Best viewed in Mozilla Firefox | Google Chrome | Above IE 7.0 version