Method for cleaning and eliminating the tannins present in shelled nuts by roasting, Use of roasted shelled fruit shells as contaminated liquid adsorbents. The invention relates to a method for cleaning and eliminating the tannins present in the shells of shelled fruits, in particular walnut shells, comprising a step of roasting the shells in the raw state. It also relates to the use of the shells obtained by hulls. the process, as adsorbent products used in the treatment of water, or as insulating materials for buildings, or as raw material for the manufacture of household tools.

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