In this study, the cation exchange capacity (CEC); phosphate immobilization capacity (PIC); and chemical, mineralogical, and morphological characteristics of the synthesized electrolytic manganese residue (EMR) based zeolite (EMRZ) were systematically investigated during the synthesis process. By varying synthesis conditions, different zeolites with different purity were generated, and it was proven that a lower Si/Al ratio, relatively higher temperature, and relatively longer time favored the synthesis of zeolite. Besides, the decrease in Si/Al ratio and variation within a narrow range contributed to the forming of Al rich zeolite. Meanwhile, the discrepancy of CEC and PIC of EMRZ contributed to the case in which various elements in EMRZ do have an impact on CEC (Na2O element and type of zeolite) and PIC (calcium and iron components). Moreover, the synthesis conditions were optimized and evaluated in terms of their CEC, specific surface area (SSA), and crystallinity. According to the analyses using XRD, FE-SEM, and XRF and the SSA analysis, the EMRZ (mainly zeolite A, LTA) synthesized under the optimum conditions (initial Si/Al ratio of 1.5, at 100°C, for 1.5 h) was found to be mainly composed of highly ordered cubic zeolites A crystals with a Si/Al ratio of 1.02 and a CEC of 3.45 meq/g.

中文翻译：

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电解锰渣合成沸石：沸石转化过程中性质变化的研究

在本研究中，阳离子交换容量（CEC）；磷酸盐固定能力（PIC）；在合成过程中系统地研究了合成的电解锰渣 (EMR) 基沸石 (EMRZ) 的化学、矿物学和形态特征。通过改变合成条件，生成不同纯度的沸石，证明较低的硅铝比、较高的温度和较长的时间有利于沸石的合成。此外，Si/Al 比的降低和窄范围内的变化有助于富铝沸石的形成。同时，EMRZ 的 CEC 和 PIC 的差异导致了 EMRZ 中的各种元素确实对 CEC（Na2O 元素和沸石类型）和 PIC（钙和铁成分）产生影响的情况。而且，根据 CEC、比表面积 (SSA) 和结晶度对合成条件进行了优化和评估。根据XRD、FE-SEM、XRF和SSA分析，EMRZ（主要是沸石A，LTA）在最佳条件下合成（初始Si/Al比为1.5，100°C，1.5小时）发现主要由高度有序的立方沸石 A 晶体组成，Si/Al 比为 1.02，CEC 为 3.45 meq/g。