Title: Dual step synthesis of chromium removal from tannery industry wastewater with photocatalytic effects of TiO₂

Authors: Marco Vinicio Masabanda; Vicente Delgado; E. Rajasekhar; Naga Raju Maddela

Addresses: Departamento de Ciencias de la Tierra y Construcción, Universidad de las Fuerzas Armadas EPSE, Sangolquí, Ecuador ' Departamento de Ciencias de la Tierra y Construcción, Universidad de las Fuerzas Armadas EPSE, Sangolquí, Ecuador ' Department of Physics, Rayalaseema University, Kurnool – 518007, Andhra Pradesh, India ' Departamento de Ciencias Biológicas, Facultad de Ciencias de la Salud, Universidad Técnica de Manabí, Portoviejo – 130105, Ecuador

Abstract: In this paper, results presented were about photocatalytic effects of titanium dioxide (TiO₂) in the removal of chromium (Cr) from tannery industry wastewater collected in tungurahua province in Ecuador. The primary source of the oxidation process (OP) is the method of photocatalysis. In this investigation, a prototype cylindrical collector (PCC) was designed to treat the wastewater. According to the results, a linear relationship was obtained between the dual step synthesis (DSS) of chromium removal from tannery industry wastewater with photocatalysis and solar energy. Photocatalysis effects showed highest removal of chromium at different concentrations and short periods of reaction time. The low-cost photocatalysts acted as functional capacity for the treatment of wastewater. The method of dual step synthesis of chromium removal from tannery wastewater with photocatalytic effects of TiO₂ could be a sustainable and green synthesis approach. Dual step synthesis (DSS) method coupled with photocatalysis is effective in the production and generation of green energy. The degradation of organic pollutants in wastewater treatment is extensively engaged with titanium dioxide. The activation of the catalyst is necessary for solar radiation.

Keywords: chromium; photocatalysis; solar radiation; titanium dioxide; wastewater.

DOI: 10.1504/IJEWM.2025.144989

International Journal of Environment and Waste Management, 2025 Vol.36 No.4, pp.404 - 418

Received: 23 Aug 2022
Accepted: 23 Jan 2023
Published online: 17 Mar 2025 *

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