20102235 Cai Yuman(Geological Survey of Jiangsu Province,Nanjing 210018,China);Chen Chong Study on Adsorption Capacity for Ammonium with Natural Zeolite(Journal of Geology,ISSN1674-3636,CN32-1796/P,33(4),2009,p.403-410,8 illus.,9 tables,25 refs.)Key words:zeolite group,cation exchange capacityIn order to discuss the regular absorption rules for ammonium with natural zeolite,the authors took the natural clinoptilolite occurred in Zhenjiang,Jiangsu Province as an experimental sample.Its mineral composition and chemical composition were tested.Their adsorption characteristic for ammonium was studied under batch experiment,and its adsorption isothermal lines were established.It is concluded that the adsorption isothermal lines met the formula Langmuir,and its adsorption capacity for ammonium was determined through mathematic analysis.20102236 Ding Hongrui(School of Earth and Space Sciences,Peking University,Beijing 100871,China);Li Yan Experimental Researches on Photoreduction of Azo Dyes in the Rutile-Cathode Bioelectrochemical System(Acta Petrologica et Mineralogica,ISSN1000-6524,CN11-1966/P,28(6),2009,p.541-546,6 illus.,1 table,17 refs.)Key words:rutileThe reductive decolorization of azo dye wastewater was investigated by using a dual-chambered bioelectrochemical cell equipped with different cathode materials(graphite and rutile-coated graphite).The results demonstrate that the cathodic electron transfer process in the irradiated rutile-cathode system is 20102235 Cai Yuman (Geological Survey of Jiangsu Province, Nanjing 210018, China); Chen Chong Study on Adsorption Capacity for Ammonium with Natural Zeolite (Journal of Geology, ISSN 1674-3636, CN32-1796 / P, 33 (4) .403-410,8 illus., 9 tables, 25 refs.) Key words: zeolite group, cation exchange capacityIn order to discuss the regular absorption rules for ammonium with natural zeolite, the authors took the natural clinoptilolite occurred in Zhenjiang, Jiangsu Province as an experimental sample. Its mineral composition and chemical composition were tested. The adsorption characteristic for ammonium was studied under batch experiment, and its adsorption isothermal lines were established. It is said that the adsorption isothermal lines of the formula Langmuir, and its adsorption capacity for ammonium was determined through mathematic analysis. 20102236 Ding Hongrui (School of Earth and Space Sciences, Peking University, Beijing 100871, China); Li Yan Experimental Researches on Photoreduction of Azo Dyes in the Rutile-Cathode Bioelectrochemical System (Acta Petrologica et Mineralogica, ISSN 1000-6524, CN11-1966 / P, 28 (6), 2009, p.541-546,6 illus., 1 table, 17 refs.) Key words: rutileThe reductive decolorization of azo dye wastewater was investigated by using a dual-chambered bioelectrochemical cell equipped with different cathode materials (graphite and rutile-coated graphite). results demonstrate that the cathodic electron transfer process in the irradiance rutile-cathode system is