There is a lack of information, however, on the kinetics and mechanisms of organo-clay interactions with pollutants. The experiments were conducted at two concentration levels, 0.001 and 0.01 mol L -1 for aniline, phenol, and their mixed solutions. Adsorption of both phenol and aniline was completed within 40 min and desorption in 20 min. When the sorptives were mixed, the rates of adsorption-desorption were not significantly affected. The rate of phenol adsorption was influenced by sorptive concentration while the rate of aniline adsorption was independent of sorptive concentration.
Various mechanisms appear to be involved in the adsorption processes.
Before using any remediation technique, one must have a thorough knowledge of the contaminated soil and site. In many cases, a combination of remediation techniques will increase the effectiveness and perhaps decrease the cost of decontamination. Without question, one of the pressing issues of our time is the preservation of the environment. Throughout the world, concerns have been expressed about an array of soil and water contaminants. Intensive research efforts are being conducted by soil scientists, engineers, geochemists, and chemists to find ways to decontaminate polluted soils and ground and surface waters and to better predict the mobility and fate of contaminants in soils.