The paper introduces a synthetic technology to produce flocculant for wastewater treatment with abandoned foamed polystyrene some flocculant products with high quality are synthesized with the procession of abandoned foamed polystyrene acyl-amidate quaternary ammonium.

A new spectrophotometric system of tetrabase [bis(4-dimethylaminophenyl)methane]-H2O2-horseradish peroxidase(HRP) was developed for the detection of HRP activity,and the reaction mechanism was discussed.

Due to the catalytic effects of Mn(II), strongly enhanced by nitrilotriacetic acid, sodium periodate could oxidize tetrabase [4,4'-bis(dimethylamino)-diphenylmethane] rapidly at room temperature in an acetate buffer medium (pH=5.

The results show that both membrane hydrophilicities and solution(viscosities) were increased with increasing the quantity of quaternary ammonium salt(BAN) in the solution,and a viscosity enhancement phenomenon was observed.

The results show that the membrane hydrophilicities and water vapor permeation increased with increasing of quaternary ammonium salt,at the same time,water vapor permeation is affected by membrane thickness and relative humidity,blend solution viscosities raise with increasing quaternarg ammonium salt in PI,and an enhancement phenomena of blend s.

The physical characters of several oil products from different oil refining factories and kerosene as diluents in tungsten solvent extraction with quaternary ammonium salt at home are determined, and then comparing them with SC-150 diluent of amine extractant at abroad.