CAJ | 학술논문

采用酸浸和焙烧法对硅藻土进行提纯处理,并用SEM和EDS等测试手段对其进行了表征;通过电势滴定（potentiometric titration）、质量滴定（mass titration）和惰性电解质滴定（in-ert electrolyte titration）3种方法测定了精硅藻土的零电荷点（PZC）。探讨了负载硝酸银溶液的精硅藻土对乙烯气体吸附性能的影响。结果表明：提纯后的硅藻土比表面积显著增大;存在与支持电解质浓度无关的零电荷点;对乙烯气体的吸收明显提高,持液量为0.4时达到最大。
채용산침화배소법대규조토진행제순처리,병용SEM화EDS등측시수단대기진행료표정;통과전세적정（potentiometric titration）、질량적정（mass titration）화타성전해질적정（in-ert electrolyte titration）3충방법측정료정규조토적령전하점（PZC）。탐토료부재초산은용액적정규조토대을희기체흡부성능적영향。결과표명：제순후적규조토비표면적현저증대;존재여지지전해질농도무관적령전하점;대을희기체적흡수명현제고,지액량위0.4시체도최대。
Diatomite was calcined after pickling with sulfuric acid for purification, and the crude diat- omite and purified diatomite were characterized by scanning electron microscopy and energy dispersive X--ray analysis. The point of zero charge （PZC） for the diatomite was measured by three methods： potentiometric titration, mass titration and inert electrolyte titration. The results showed that the specif- ic surface area of diatomite increases remarkably, the PZC independent of electrolyte concentration ex- ists and the adsorption capacity of the diatomite on ethylene improved effectively.