Abstracts Book - IMRC 2018

• SF5-P038
POLYELECTROLYTES CONTAINING TETRAZOLE PENDANT GROUPS
USEFUL FOR TEXTILE DYE REMOVAL
Martín Caldera Villalobos 1 , Alejandra Alicia Peláez Cid 2 , Miriam Amelia Martins Alho 3 , Ana María
Herrera González 1
1 Universidad Autónoma del Estado de Hidalgo, Instituto de Ciencias Básicas e Ingeniería,
Mexico. 2 Benemerita Universidad Autonoma de Puebla, Facultad de Ingeniería, Mexico.
3 Universidad de Buenos Aires, Facultad de Ingeniería, Argentina.
Textile dyes are currently one of the pollutants that have received more
attention because of the large volume of wastewater generated by the textile
industry. Textile dyes are not biodegradable and they are highly toxic for the
flora and the fauna and they are persistent pollutants. Removal by adsorption
is one of the most versatile alternatives for the treatment of these effluents.
Although different adsorbents have been proposed, such as activated carbons
and materials of mineral origin, polymeric adsorbents are a viable alternative.
In this work, we report the use of polyelectrolyte PTZ and macroelectrolyte MTZ
with tetrazole pendant groups as useful adsorbents in the removal of textile
dyes present in aqueous solutions and wastewater. Due to the anionic nature
of the tetrazole group, MTZ has selective adsorption capacities of cationic dyes
higher than 156.25 mg g -1 . The kinetic study of the adsorption process showed
that the adsorption process with PTZ and MTZ is described by the pseudo
second order model. MTZ was also used as a flocculating agent in the treatment
of wastewater containing indigo blue and reactive coffee dyes. The results
showed that PTZ and MTZ can be used in the treatment of wastewater in a
coagulation and flocculation process followed by adsorption treatment. The
two-stage treatment removed up to 95% of the dyes present in the wastewater.
After remove textile dye wastewater, the values of COD, solids content,
conductivity and color were decreased significantly, improving the quality of the
wastewater.
Keywords: Polyelectrolytes, Adsorption, Textile dyes
Presenting authors email: alalpeci@hotmail.com