Application of TiO 2 nanoparticle for solar photocatalytic oxidation system
- PDF / 2,026,931 Bytes
- 8 Pages / 595.276 x 790.866 pts Page_size
- 69 Downloads / 255 Views
ORIGINAL ARTICLE
Application of TiO2 nanoparticle for solar photocatalytic oxidation system Yu‑Ming Chu1,2 · Quang‑Vu Bach3 Received: 1 October 2020 / Accepted: 27 October 2020 © King Abdulaziz City for Science and Technology 2020
Abstract The main purpose of this study is to optimize the applicability of TiO2 nanoparticles for paper mill and pulp wastewater treatment under solar irradiation using response surface methodology, provided by the software package DOE. The principle independent parameters were T iO2 loading, pH, time and H 2O2 concentration, and COD removal efficiency was chosen as desire response. To evaluate the influence of the parameters on the outputs, the quadratic formulation was applied and for determining the validation of developed models analysis of variance was utilized. The results represented the greatest COD removal was achieved 82%, approximately at pH of 8.1, T iO2 fraction of 0.83 g/L, H2O2 concentration of 2.4 ml/L and the contact time of 196 min. Keywords TiO2 loading · Wastewater treatment · Response surface methodology · COD removal · Solar photocatalytic oxidation
Introduction One of the largest and the most considerable water con‑ sumers in the world is pulp and paper industry, in a way that for the each ton of product this industry can consume 20,000–60,000 gallons water, and generates an abundant amount of complex wastewater during pulp bleaching and wood preparation (Pokhrel and Viraraghavan 2004; Razali et al. 2011; Man et al. 2017). The complex wastewater con‑ tains toxic pollutant, heavy metals, phosphorus and sculp‑ ture compounds, organic and inorganic component, such Corresponding author at Faculty of Environment and Labour Safety, Ton Duc Thang University, Vietnam. * Quang‑Vu Bach [email protected] 1
Department of Mathematics, Huzhou University, Huzhou 313000, People’s Republic of China
2
Hunan Provincial Key Laboratory of Mathematical Modeling and Analysis in Engineering, Changsha University of Science and Technology, Changsha 410114, People’s Republic of China
3
Sustainable Management of Natural Resources and Environment Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Vietnam
as lignin and its phenolic derivatives, which commonly characterized by COD, suspended solids (SS), BOD, etc. (Klidi et al. 2019; Chu et al. 2016). This industry wastewa‑ ter has slight biodegradability by the low ratio of BOD5/ COD (Kamali and Khodaparast 2015). Given the described conditions, wastewater treatment is indispensable, for the aim of diminishing the value of consumables fresh H2O and discharging the wastewater to the environment (Camcioglu et al. 2017). The principal paper mill wastewater behavior process is primary and secondary treatment. The primary treat‑ ments (filtration and sedimentation) remove some pollut‑ ants suchlike SS, grease, and colloid, but after this treatment level the dissolved contaminates were still remained in the wastewater; therefore, secondary treatment (biological pro‑
Data Loading...
