Development of wheat straw derived zeolites for bioremediation of oil
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Date
2022-05-23
Journal Title
Journal ISSN
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Publisher
GALGOTIAS UNIVERSITY
Abstract
The rapid growth of industrialization and the ever-emerging new technologies have increased
concerns about innovative emerging ideas of waste utilization and cost reduction. One of the
ways is in the industrial sector to utilize & process rice husk, wheat husk or straw
(lignocellulosic biomass) for production of a useful cost-effective material like zeolite. Zeolite is
a superb adsorbent material which has been synthesized from inorganic as well as organic waste
such as natural clay, fly ash, wheat husk ash, bagasse, rice husk, etc. Zeolites have great
commercial value and thus in the present project zeolite have been synthesized from
lignocellulosic waste like wheat straw and rice husk since these wastes are widely available and
inexpensive. In this research optimization of zeolites production was done using different acids
& bases. The zeolites thus produced were then analyzed for their oil bioremediation properties.
The results showed that zeolites adsorbed different kinds of oil in a very efficient and effective
way.
Description
Zeolite comes from the Greek word which refers to minerals that absorb water on heating [1].
Zeolites have crystalline structure made up of silica, aluminium and oxygen. They form a 3D
cage like structure with cavities or channels whereby alkali/alkali earth metals and water
molecules reside. They are also known as molecular sieves due to their similar pore size
structure. According to researchers, rice husk (RHA) contains 90-99% silicon dioxide, which
may be an inexpensive supply for a few industries to use as a stuff [2-4]. Zeolites are found
naturally and can also be synthesize in laboratories. Natural zeolite like chabazite, phillibite,
stilbite, natrolite etc. are non- porous and are mainly found in volcanic origin and in sedimentary
rocks origin. M2/n:Al2O3:xSiO2:YH2O, is the general of zeolite where M stands for the metal ion
layered framework. In reference to US geological survey, there are almost 40 types of zeolites of
sedimentary and volcanic origin. Synthetic zeolites are designed by scientists for specific
purposes for example ZSM (petroleum catalyst), Zeolite A (for laundry and detergents purposes)
etc. Synthetic zeolites are porous and have high exchange capacity than natural zeolites
poses for example ZSM (petroleum catalyst), Zeolite A (for laundry and detergents purposes)
etc.
Keywords
wheat straw
Citation
wheat straw