Method of making an adsorbent fibrous nonwoven composite structure

A process of making an adsorbent fibrous nonwoven composite structure comprising:

• providing an aqueous suspension of pulp fibers and at least one adsorbent material, the suspension being free of wet-end suspension additives,
• depositing the aqueous suspension onto a paper-making forming surface to form a layer of fibers and adsorbent material,
• removing water from the layer under sufficient vacuum so that adsorbent material is concentrated near one surface of the layer to yield an adsorbent fibrous nonwoven composite structure having a first exterior surface and a second exterior surface,
• wherein the concentration of adsorbent material adjacent the first exterior surface of the nonwoven structure is at least 60 percent, as determined by optical image analysis, and the concentration of adsorbent material adjacent the second exterior surface of the nonwoven structure is less than 40 percent, as determined by optical image analysis.