Parfect

1.Developing comprehensive soil remediation technology . The single remediation technology can not meet the current demand for contaminated soil treatment , and the future research direction should be the organic combination of various technologies. For example, the combination of plant microbial remediation, integrated oxidation reduction,, a new in situ composite repair technology combined with flushing and reactive wall technology, phytoremediation combined with physical and chemical remediation, and so on. 2.Give full consideration to ecological benefits. While considering economic benefits, ecological benefits should be taken into full consideration. As a result, bioremediation, especially phytoremediation, will become the mainstream in future remediation technologies. 3.Focus on improving the existing advanced technology. For phytoremediation, more and better heavy metal enrichment plants can be found, screened and domesticated. Or, by using genetic engineering technology, the to...

Soil stabilizer is a new type of energy saving and environmental protection material which is synthesized by many inorganic and organic materials. It is mixed with the soil through a series of physical and chemical reaction to change the engineering properties of soil, a large amount of free water in the soil can be fixed in the form of crystalline water, makes the soil micelle surface current reduced, the electric double layer adsorption by micellar thin electrolyte concentration increased, the particles tend to be condensed, volume expansion the filled soil pore, the compaction power, easy to make the solidified soil compaction and stability, thus forming the overall structure, and achieve the pressure density can not be achieved by conventional. The soil after the soil curing agent treated, its strength, density, modulus, deflection, CBR, shear strength and other properties have been greatly improved, thereby prolonging the service life of the road, save the project cost of mainten...

From the development of the industry, since 2009, the growth rate of environmental protection industry has been significantly accelerated. Affected by this, the China soil remediation industry chain has gradually entered the orderly and differentiation stage, formed from the soil pollution project risk assessment, to detect and repair project implementation, as well as the corresponding repair equipment manufacturers on the downstream industry value chain. Chinese soil remediation market is still in its infancy, according to statistics, about 43.75% of Chinese soil remediation project scale is small, concentrated below 50 million. More than 200 million of the relatively large scale projects accounted for only 18.75%. Compared with the United States and Europe have remediated 30283 and 80700 contaminated sites project, our country has remediated more than 200 sites, the soil repair market is still in the bud stage, but the development trend is good. According to the analysis report re...

Physical soil remediation refers to the removal or separation of pollutants (especially organic pollutants) from soil by various physical processes. Heat treatment technology is mainly applied in physical organic contaminated soil remediation technology of industrial enterprises, including thermal desorption, microwave heating and steam extraction technology which has been applied to the repair of benzene, polycyclic aromatic hydrocarbons, PCBs and dioxin contaminated soil. 1.Thermal desorption technique Thermal desorption is a direct or indirect heat exchange process to heat organic pollutants in soil to a high enough temperature to evaporate and separate from soil medium. Thermal desorption technology has the advantages of wide range, pollutant treatment equipment can be mobile, after the restoration of soil can be used, especially for organchlorine like PCBs, approach of non oxidative combustion can significantly reduce the generation of dioxin. At present, the western countries ha...

When the silt layer is thicker and it is difficult to carry out the deep treatment in large area, the pile foundation treatment can be adopted to reinforce the soil. And the pile foundation treatment is various, early in the use of cement mixing pile, sand pile, while is rarely used now. First, the water cement ratio of the cement and soil mixing pile, the amount of slurry and the times of mixing, the management automation system is not perfect, and the equipment is outdated, backward technology, there are problems of poor homogeneity of mixing and unstable quality of pile forming; Second is sand gravel pile used to reinforce the deep silt soft soil foundation. Because of the long construction period and the large deformation after treatment, it is no longer used as the foundation treatment for the deformation; Third is the civil construction has banned wood pile foundation. Reinforced concrete precast pile is widely used at present because of its strong bearing capacity, low investmen...