No abstract

As to the hot research aspect of soil remediation, this review elaborated the progress in the application of nanomaterials in heavy metals and organics-contaminated soil remediation, and discussed the ecological safety of nanomaterials usage as well. The mechanism of nanomaterial-based soil remediation mainly includes adsorption, complexation, transformation, etc. The activities of nanomaterials could be enhanced by modification methods. Iron based nanoparticles such as zero-valent iron (nZVI), iron oxide and iron sulphide showed promising application prospect but also possible toxicity to soil ecosystem. However, biologically synthesized nanomaterials are more effective and safer, which has been demonstrated in many studies. Therefore, bio-nanomaterials which can not only meet the requirements of soil recovery, but also contribute to soil fertility is urgently needed.

No abstract

In this study, cotton stalks were used to make cotton stalks bales. Based on the characteristics of cotton stalks, different fabrication techniques were employed to make cotton stalks bales in an attempt to find the best manufacture method. Tests were also performed on the pressure-resistant properties of the stalks bales. The following conclusions were drawn: With stalks orderly placed, cotton stalks bales made by the method of density control had a constant density and relatively stable pressure-resistant properties. When vertically placed, the stalks bales showed better pressure-resistant properties and the least deformation. The pressure-resistant property of the stalks bales could meet the requirement of non-load bearing walls when placed horizontally, but when placed laterally, it could not.