Considering that this way may result more nitrite nitrogen, it really needs to add chlorines regularly before recovery with duration 30 days in summer and 60 days in winter. 考虑到滤前加氨会导致滤后水产生过多的亚硝酸盐氮,因此需要定期恢复前加氯。恢复前加氯的周期为夏季30天左右,冬季60天左右。
When the Chloramines disinfection water is combined with the liquid chlorine disinfection water and reaches some stable ratio for a long time, the great reduction of the remained and total chlorines in the piped system will be obtained. 氯胺消毒处理后的水与液氯消毒后的水在管网中混合达到一定比例,长时间稳定接触,将会出现管网水余氯、总氯大幅度降低的现象。
This article summarized that the farmland are polluted by heavy metal, radioactive matter, nitrate and organic chlorines etc because of sewage irrigation, unreasonably using chemical fertilizer and pesticide, and diggings pollution. 概述了由于农时操作过程中用污水灌溉、不合理施用化学肥料、化学农药,以及矿区排污等途径造成农田土壤遭受重金属、放射性物质、硝酸盐以及有机氯残留等污染。
The results showed that different classification of organic compounds had different effects on different molecular descriptors. The orders of correlation between number of chlorines and molecular descriptors are as follows: LogP> LUMO> HOMO> Δ E> dipole moment. 结果表明不同种类化合物对不同分子描述符的影响是不同的,其中以LogP和LUMO对氯原子数的相关性较好,HOMO次之,ΔE和偶极矩最差。
The photo-reactivity of PCBs was related to the position and quantity of chlorines on the PCB congeners. PCBs的光化学活性与其氯原子数量和取代位置有关。