A study of thermodynamic properties of halogenated methane by the method of chemical bond parameter function

Molecular structural parameters including inductive effect index(∑I),equilibrium electronegativity of atom(XE),total electron of atom nuclear external(∑e),total bond length of substituents to center atom(∑d) and electronegativity margin for all substituents(ΔX) were used model the 13C chemical shift of 45 halogenated methane.

A correlation was investigated between the boiling points and molecular structure of halogenated methanes, and a new method was developed to calculate and predict the boiling points of halogenated methanes.

Trihalomethanes in drinking water reduction through air stripping

The laboratory-scale and pilot-scale experiments were conducted to investigate the efficiency of controlling trihalomethanes(THMs) yields by combined preoxidation,which was carried out by potassium permanganate composite(PPC) and chlorine using a typical contaminated resource water in northern China.

Variations of assimilable organic carbon(AOC),trihalomethanes(THMs) and haloacetic acids(HAAs) in two different water distribution systems(DSs) were investigated in Shanghai,a eastern city of China.

Research on THMs formation kinetics in water network;

Determination and Evaluation of THMs in Water Supply in Kelamayi City

Some organic matter that have aromatic structure similar as humic acid are selected to conduct chlorination test,determined the formation of HAAs & THMs of tested matters,researched the relationship of the chemical structure of DBPFP with DBPs formation characteristics.

Effect of Electronegativity and Polarizability on the C 1s Core Ionization Energies of Halomethanes;

The electrostatic effect constants for the substituents in an aromatic system were used firstly to study the bond dissociation enthalpy (BDE) of a halomethane system Y-CHnX3-n (n=0,1,2 and 3; Y=H,F,Cl,Br and I; X=F,Cl,Br and I).

It is observed that the removal efficiencies and the sonolysis rate constants of three halomethanes after 1h ultrasonic irradiation fitted the following increasing order:CHCl3< CHBrCl2<CCl4,and the degradation of halomethanes studied followed the pseudo-first-order kinetics model,respectively.