The Adsorption of Organic Pollutants by Gemini Surfactant-Modified Montmorillonite from Water by Zhenghua Wang in (MAOPS)-Lupine Publishers
Water is a very important resource to human life and the development of
society. But large amounts of natural and anthropogenic organic
substances are constantly discharged to water bodies. The serious
problem of water pollution has been raising a global concern. These
typical organic contaminants in water environment include but not
limited to dyes, pharmaceuticals and personal care products (PPCPs),
phenols and polycyclic aromatic hydrocarbons (PAHs). Most of those
compounds are toxic to aquatic biota and human beings. Therefore,
removal of this organic matter from water is a great subject of research
nowadays. Off all the removal methods, adsorption is an effective
technique which is widely used. Various adsorbents have been studied
that include materials based on carbon, clay minerals, polymers, silica,
and so on. Clay minerals are considered as low cost and easily
available adsorbents. Montmorillonite, a 2:1 layered dioctahedral
aluminosilicate of smectite group clay, is one of the most investigated
clay minerals for removing organic pollutants because of its versatility
and facile modification of its porosity, acidity, hydrophilicity, and
so on. But natural montmorillonite is not a suitable and effective
adsorbent, so it is necessary to modify the surface of montmorillonite
to improve its physico-chemical properties and value in use. Organic
surface modification is one of the most extensive technologies among
those modifying methods, and the modifiers are usually conventional
surfactants.
No comments:
Post a Comment
Note: only a member of this blog may post a comment.