对天然沸石进行 NaCl-焙烧改性、LaCl3调控,再载入银离子制备出复合沸石。研究发现,复合沸石对污水氨氮和磷的去除率分别可达91．66％和90．09％,抗菌率达到96．58％。在此基础上,运用扫描电镜(SEM)和能谱图分析(EDS)、红外光谱图分析(IR)、离子交换容量(CEC)、比表面积与孔径分析等手段对改性复合后的沸石进行结构表征,来进一步探究复合改性对沸石物化性质及脱氮除磷抗菌性能的影响。结果表明,天然沸石经改性复合后,孔道被拓宽,孔容积、比表面积等均有所增加。复合沸石 Na、La 和Ag含量增加,Ca、Mg 等含量相应的减少。改性复合后沸石的阳离子交换容量与天然沸石比均有提高。
Natural clinoptilolite was modified by NaCl firing,LaCl3 regulation,and loading the silver ions to pro-duce composite clinoptilolite.The study found that the ammonia-nitrogen and phosphates removal rate of com-posite zeolite reached to 91.66% and 90.09%,antibacterial rate reached to 96.58%.And on this basis ,the effect of modification on physicochemical properties of clinoptilolites and nitrogen and phosphate removal per-formance as well as sterilizationthe were further explored by SEM,EDS,IR,CEC and N2-porosimetry analy-sis,respectively.Results showed that after modified,the channel got broaden;pore volume and specific surface area increased compared with the natural one.The Na ion content,La ion content and the Ag ion content of composite zeolite increased while the Ca ion content decreased.In addition,the cation exchange capacity of both the modified zeolite and the composite zeolite improved compared with natural zeolite.
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