Fabrication of Novel Aerated Concrete Blocks By Using Traditional and Synthetic Materials Together

Different unconventional materials have been evaluated as adsorbents for the treatment of colored effluents from the textile industry. This work evaluated the capacity of gooseberry shell (GS), an agro-industrial waste for the removal of basic red 46(BR46), which is a cationic dye, widely used in different staining processes.

A 2³ factorial design was carried out under a discontinuous system, where the factors analyzed were, adsorbent dosage(D), initial dye concentration(Co) and contact time(t) The experiments were carried out at a pH value of 7.0, a particle size ranging from 0.3 to 0.5 mm, a temperature of 25°C and a stirring speed of 180 rpm.

The corresponding amount of GS was weighed and added to a 50 mL Erlenmeyer flask with the dye solution at the given concentration. Finally, the concentration in the final time was measured with a Lambda 35 UV-Vis Spectrophotometer at a wavelength of 530 nm using a calibration curve ranging from 1 to 20 ppm; the response variable corresponds to the removal percentage, defined as follows:%Rem=(C -C )/C *100.

Results are shown in Table1

Table1. Removal percentages for the 2³full factorial design.

According to the results, GS allowed a maximum removal of 89.39 % at a concentration of 30.0 mgL/1, a dosage of 10 gL/1 and a contact time of 4 h. Even so, it is possible to obtain satisfactory results if we keep (t) and (D) but duplicate (Co), as the conditions described for group9, indicating that GS has a good capacity to adsorb BR46. In this sense, it is also possible to obtain similar results if operating under the conditions of group3, with even a shorter contact time. Under different operating conditions, is feasible to reach a good BR46 removal using GS as unconventional adsorbent.