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This article shows how pine sawdust residues can be used to adsorb nickel ions from synthetic solutions and then to produce porous bricks for civil construction using a mixture of natural clay and biomass containing the adsorbed metals. The adsorption tests were performed by mixing NiCl 2 solutions with pine sawdust during a fixed stirring period of 24 h. The set was filtered and the filtrate was analysed. Highest efficiency adsorbate/adsorbent ratio was 50 mL of 1 M NiCl 2 solution and 20 g L − 1 of pine sawdust. This was the contaminated biomass sample used in the manufacture of the bricks. This paper analyses the properties of the bricks achieved and compares them with bricks without added biomass, porous bricks containing zinc and commercial bricks. The obtained values of bulk density, apparent specific weight, apparent porosity, water absorption, apparent volume, weight loss on ignition, compressive strength, flexural modulus of rupture and efficiency retention of metal in the brick, demonstrate that the ceramic pieces obtained are optimal for construction.

Ceramic bricks containing Ni ions from contaminated biomass used as an adsorbent