摘要
有机粘土化学是研究粘土矿物与有机化合物之间相互作用的一门学科 ,其内容包括粘土矿物对有机化合物的吸附作用 ,粘土矿物对有机化合物转化的催化作用以及有机化合物对粘土矿物的合成与风化的影响。着重阐述了近 2 0年来有机粘土化学的研究进展 ,并就这一学科领域的研究作了展望。
Organo clay chemistry is the discipline that study the interactions of clay minerals and organic compounds, which include adsorption of organic compounds on the clay minerals and the catalytic effect of clay minerals on the transformation of organic compounds on clay surfaces, and as well as the effect of organic compounds on the formation and weathering of clay minerals. This paper stressed the importance of the organo clay chemistry in soil science, environmental protection, drilling industry, chemical engineering, petroleum exploration, and reviewed the progress in the research in this area during the last two decades. The synthesis of organo clay complexes can be reached through the reaction of melted organic compounds with clay, grinding method, polymerization of previously adsorbed monomers, exchanging an easy intercalated compounds, in additon to the traditional direct solution suspension reaction. The general bonding mechanisms and steric orientation of simple organic compounds on clay surfaces and in the interlayers of swelling minerals are clearly understood. Clays modified with quaternary ammonium containing long alkyl chains can tremendously increase their removal capacity for hydrophobic organic contaminants such as oil and aromatic compounds from water. Clay minerals can function as Bronsted and Lewis acid catalyst in the transformation of organic compounds; pillared clays, which are intercalated with polyoxymetal cations in the interlaysers of smectite, can play the same roles as molecular sieves, which can increase the selectivity or specificity of the reactions. Clay minerals have been used in many reactions such as petroleum cracking, dehydration, esterification, transamination, epoxydation, and so on. The catalysis of clay minerals may play important roles during petroleum formation. Clay minerals also influence some biochemical processes by their adsorption or catalytic effects, such as the synthesis and polymerization of aminoacids, the biochemical activity of nucleoside, nucleotide, enzyme cofactor and enzyme. These effects imply the clay minerals may have had their role in chemical evolution on the early earth. Further going research will extend the minerals from currently mostly studied smectite to more clay minerals, and from simple model organic compounds to more complicated compounds such as humus materials. Future studies should pay more attention to the roles of clay mineral in the transformation of organic compounds in the complex soil and sediment systems. The role of clay mineral in the chemical evolution of early Earth which lead to the origin of life will be studied by organo clay scientists in the future.
出处
《地球科学进展》
CAS
CSCD
2000年第2期197-203,共7页
Advances in Earth Science
基金
国家自然科学基金项目!"粘土矿物与有机化合物的交联作用及其表现的研究"(编号 :494710 42 )
"红壤矿物演变与发生特性研究"(编号
