Diatomite　is　a　kind　of　nonmetallic　mineral　that　possesses　ordered　micro-　and　mesoporous　structures,　and　is　well　substrate　materials　for　loading　highly　active　oxide　nanostructures　for　the　removal　of　heavy　metal　ions.　In　this　work,　the　Mg3Si4O10(OH)(2)　and　MgFe2O4　nanosheets　were　loaded　on　diatomite　via　a　facile　hydrothermal　method.　The　Mg3Si4O10(OH)(2)/diatomite　sample　had　a　specific　surface　area　of　149　m(2)/g　and　an　extremely　large　adsorption　capacity　of　535　mg/g　for　Cr(VI)　adsorption　at　room　temperature,　and　the　MgFe2O4/diatomite　sample　possessed　a　higher　surface　area　of　335　m(2)/g　and　a　larger　capacity　of　570　mg/g　for　Cr(VI)　adsorption　under　UV　light　irradiation.　The　Cr(VI)　adsorbed　on　the　surface　of　MgFe2O4/diatomite　was　reduced　to　the　less　toxic　Cr(III).　The　synergistic　effect　of　between　adsorption　and　photocatalysis　might　be　the　main　reasons　why　the　MgFe2O4/diatomite　sample　was　superior　to　the　Mg3Si4O10(OH)(2)/diatomite　sample　in　Cr(VI)　removal　capacity　and　efficiency.　It　is　assured　that　such　adsorbents　have　a　great　potential　for　practical　applications　in　the　removal　of　heavy　metal　ions　in　wastewater.