In the rapid ion-chromatographic determination of PO3-4,SO2-4 and NO-3 anions in the drink "Coca Cola",the combining use of the columns of Dionex IonPac AS14 and IonPac AG14 was substituted by the single used of the IonPac AG14A,as chromatographic column which made the 3 anions separated satisfactorily within 3 min.

The removal and optimum removal conditions of Cl-,NO-3 and NO-2 in water by modified bauxite were studied.

Flow injection analysis is used to detect the contents of NO-2 and NO-3 in fishpond water samples.

The adsorption and desorption characteristics of ammonia and nitrate in purple soil were researched in this paper under the condition of 25±1℃.

Anaerobic batch experiments were performed to evaluate the effects of environmental factors,including coexisting heavy metals(Zn,Cu) and oxyanions(sulfate,nitrate)on U(VI) bioreduction processes(UBP).

In order to study the effect of nitrate on the biological phosphorus removal,the anaerobic-anoxic-aerobic(A2/O) oxidation ditch(OD) process was adopted to treat the municipal wastewater combined with the captive test for 4 months,meanwhile the operation data of an A2/O oxidation ditch wastewater treatment plant were analyzed.

The content of NO_3~-is an important indication to measure if ground water is polluted.

In this paper we studied the NO_3~- and NH_4~+ s absorption absorption character about Tianyan 7 and Tianyan 8 in different period.

Study on Behavior of Fe~(3+),NO_3~- in Photocatalytic Degradation of Methyl Orange;

The effect of SO2-4 concentrations on the performance of anaerobic granular sludge were investigated using batch experiments with the sludge obtained from an operating anaerobic baffled reactor(ABR).

To study on the process of removal of SO2-4 from sodium multi-component solution and add some additive to remove the SO2-4 from the solution.

In the rapid ion-chromatographic determination of PO3-4,SO2-4 and NO-3 anions in the drink "Coca Cola",the combining use of the columns of Dionex IonPac AS14 and IonPac AG14 was substituted by the single used of the IonPac AG14A,as chromatographic column which made the 3 anions separated satisfactorily within 3 min.

In this article,sulfate concentration and sulfur oxidation ratio in heating season were measured with on-line systems,and the relationships between sulfur oxidation ratio and influencing factors were discussed.

The technology of microbial U(VI) reduction by sulfate reducing bacteria(SRB) was employed to treat simulated wastewater from in situ leach(ISL) uranium mining.