The Inclusion Of Hydroxypropyl-beta-cyclodextrin In Weak Polar Organic Pollutants In Soil

The Inclusion Of Hydroxypropyl-beta-cyclodextrin In Weak Polar Organic Pollutants In Soil - HPBCD - News - Shandong Binzhou Zhiyuan Biotechnology Co.,Ltd

As a new solubilizing agent, cyclodextrin and its derivatives can form inclusions with weakly polar organic pollutants, thereby significantly increasing their solubility in water. For example, by studying the removal and migration of weakly polar contaminants from soil by hydroxypropyl-beta-cyclodextrin, the results show that hydroxypropyl-beta-cyclodextrin does not adsorb on the soil, and its existence can be Weakly polar contaminants (such as trichloroethylene, naphthalene, biphenyl, 2-chlorobiphenyl, trichlorobenzene, hydrazine and hydrazine) have significant promotion in the removal of two soils with organic matter content of 0.29% and 12.6%, respectively. The effect, and as the concentration of HP-β-CD in the aqueous solution increases, the promotion is also enhanced.

In the absence of HP-β-CD, about 1800 times the pore volume of water in order to remove 99% of the hydrazine adsorbed in Borden soil (organic matter content of 0.29%), while using 10g / L HP-β- When the CD solution is used, only one thread volume is required to achieve the same effect. The promotion of HP-β-CD on the transport of weakly polar organics in two pore media is directly proportional to the hydrophobicity of the organic matter. For example, the presence of HP-β-CD reduced the retention factor for hydrazine from 161.8 to 2.4, while for trichlorobiphenyl, the retention factor decreased from 828 to 1.6.

The comparison of the promotion of HP-β-CD on the transport of organic pollutants in soil with the effects of other organic substances shows that HP-β-CD is stronger than other organic substances. The most obvious advantage of HP-β-CD is that it has no obvious retention or adsorption in the soil and no secondary pollution