This paper uses the potassium permanganate and the sodium sulfite compound reducing agent to make fresh manganese dioxide and processes each kind of turbidity raw water with it,inspects this fresh manganese dioxide s coagulate efficiency,the influencing factor and possible mechanism to reduce turbidity.

A new Au-Ag recovery process,"additives roasting-chlorination leaching-reduction by sodium sulfite" for the complex gold flotation concentrate is described in this article.

Objective A inhibitor(sodium hydrogen sulphite)of formaldehyde volatilization has been developed to decrease the disgusting smell and harmful irritation of formaldehyde used in anatomy,pathology and biology as an usual preservative.

Influence factors of deoxidizing phosphogypsum by compound reducing agent

Preparation of high-concentration sulfur dioxide from deoxidizing phosphogypsum with compound reducing agent

Isolation of a extracellular sulfite reductase pruducing bacteria and studies on the characteristic of enzymology;

The fermentation conditions of sulphate reducing bacteria producing sulfite reductase were reported,including carbon sources,nitrogen sources,temperature,pH,the loading amount and so on.

The sulfite reductase was purified to electrophoretic homogeneity by ammonium sulfate salting-out,Sephadex G-100 gel filtration and DEAE-52 cellulose column chromatography.