At　present,　the　development　of　green　and　efficient　heavy　metal　adsorption　materials　has　attracted　extensive　attention.　Using　diatomite　as　raw　material,　two　kinds　of　silicate　materials,　namely,　magadiite　and　analcime,　were　selectively　prepared　by　hydrothermal　method.　The　Na+　between　the　layers　of　wheat　hydroxysodalite　could　exchange　cations　with　Li+,　Mg2+,　Zn2+,　Co2+,　Ni2+,　Cu2+,　etc.,　and　maintain　the　stability　of　the　layered　parent　framework.　The　adsorption　kinetics　and　mechanisms　were　detailedly　studied　by　using　Co2+　and　Ni2+　adsorption.　It　is　indicated　that　the　distance　of　magadiite　lamellar　structure　was　reduced　from　1.56　nm　to　0.24　nm(Co2+)and　0.23　nm(Ni2+).　The　maximum　adsorption　capacity　towards　Co2+　and　Ni2+　reached　45　mg/g　and　39　mg/g　at　room　temperature,　respectively.　The　adsorption　processes　were　fitted　with　the　Langmuir　model.　The　released　Na+　was　approximate　double　of　the　adsorbed　divalent　Co2+　and　Ni2+,　showing　that　cation　exchange　dominated　the　adsorption　processes.　Thus,　the　prepared　magadiite　materials　demonstrated　great　potentials　for　constructing　multimetal　silicates　and　environmental　purification　applications.　©　2022　INORGANIC　CHEMICALS　INDUSTRY.　All　rights　reserved.