Simultaneous immobilization of V and Cr availability, speciation in contaminated soil and accumulation in ryegrass by using Fe-modified pyrolysis char.

In this study, municipal waste pyrolytic char (PEWC) was prepared by pyrolysis from municipal solid waste extracted in landfills, and Fe-based modified pyrolytic char (Fe-PEWC) was prepared by modification. Focusing on the evaluation of the stabilization capacity of Fe-PEWC for vanadium (V) and chromium (Cr) in soils, the effects of PEWC addition on soil properties, bioavailability and morphological distribution of V and Cr, ryegrass growth, and V and Cr accumulation were thoroughly investigated. The results of pot experiment showed that the application of PEWC and Fe-PEWC significantly (P < 0.

The effect of chitosan molecular weight on CO-triggered switching between emulsification and demulsification.

The role of molecular weight as a key physical property of macromolecules in determining the CO-triggered switching characteristics of responsive emulsions prepared using CO-switchable macromolecules has not been studied and is the focus of the current study. In this work, CO-switchable chitosan of four different molecular weights is used to investigate the effect of molecular weight on CO-triggered switching of CO-responsive emulsions. The molecular weight of chitosan is shown to have an opposite effect on emulsification and demulsification by the CO trigger.

1,3-Bis(4-tert-butyl-phen-yl)-4-nitro-butan-1-one.

In the crystal structure of the title compound, C(24)H(31)NO(3), mol-ecules are connected via C-H⋯O inter-molecular hydrogen bonds, forming dimers. The benzene rings are oriented at a dihedral angle of 29.8 (1)°.