电气石自发电极性对溶液pH和亚硝化单胞菌生长影响研究

Study on the effect of tourmaline spontaneous polarity onwater pH and the growth ofnitrosomonas

电气石具有自发电极性,利用傅里叶变换红外光谱分析不同煅烧温度处理下电气石的变化,研究并探讨电气石自发电极性对溶液pH的影响;并借助微生物检测手段,研究电气石自发电极性对微生物生长的影响。结果表明,电气石能调节溶液pH至弱碱性,煅烧温度为800℃时,由于电气石晶胞体积的缩小,电极性增强,pH显著上升(9.8);煅烧温度为1 000℃时,BO3原子团振动峰消失,羟基振动峰和Si—O—Si对称伸缩振动峰强度明显减弱,自发电极性消失,不再具有调节pH的作用。电气石可明显促进亚硝化细菌生长繁殖,缩短细菌适应期,提前进入稳定期,大幅增加细菌数量,5d后投加电气石组中亚硝化单胞菌数量为9.66×108个/mL,远多于对照组中亚硝化单胞菌的数量(8.04×107个/mL)。

With help of the spontaneous polarityproperty, the variation of tourmaline after calcinations could be analyzed by FTIR spectra. The effects of tourmaline spontaneous polarity on water pH and nitrosomonas growth were investigated through the batch experiments. Results showed that tourmaline could adjust the water solution to slightly alkaline,after calcinations at 800 ℃ for a certain time,the electrical polarity of tourmaline was obviously enhanced be- cause of the cell volume reduction;the calcinated tourmaline could increase the solution pH to about 9.8. However,af- ter 1 000 ℃ of calcinations,the infrared absorption spectra of tourmaline changed a lot, vibrating peak of BOa radical was disappeared,and the vibrating intensity of OH radical and Si-O-Si symmetrical stretching radical receded evident- ly. The spontaneous polarity of tourmaline was disappears,thus its ability for pH adjusting was diminished. Tourma- line can obviously promote the growth of nitrite bacteria, shorten the adaptive phase of bacteria,and increase the num- ber of bacteriasubstantially. After 5 days of cultivation, the number of nitrosomonas in tourmaline group was 9.66 × 10^8 CFU/mL,which is far more than the control group （8.04×10^7 CFU/mL）.