Non-Parametric Regression Analysis of Diuron and Gabapentin Degradation in Lake Constance Water by Ozonation and Their Toxicity Assessment

Abstract

Ozone possesses high selectivity in the oxidation of organic pollutants. It actively reacts with electron donating participants which contain π bonds and non-protonated amines groups. The removal efficiency of organic pollutants hugely depends upon the pollutants’ initial concentration and amount of ozone supplied. This study was conducted at Zweckverband Bodensee-Wasserversorgung (Lake Constance Water Supply), Germany. The prime objective of the research was to observe the performance of diuron and gabapentin ozonation for low ozone doses, therefore meeting the real application requirements of the water treatment plant. Thereby, 1 mg·L−1 of the given organic pollutants was chosen for the treatment. The ozone with a dosage of ≈0.68–1.01 mg·L−1 was generated and homogeneously mixed into Lake Constance water in a semi-batch reactor system. The adequate aliquots of diuron/gabapentin were spiked into the homogenous matrix to acquire the desired initial concentration. The effect of ozone dose and reaction time on the degradation of diuron and gabapentin was investigated. Low ozone doses were sufficient for the complete degradation of diuron and gabapentin, although satisfactory total organic carbon (TOC) reduction was not achieved. Nonetheless, the toxicity from ozone treated effluents can be avoided by adjusting treatment conditions. Due to that degradation data obtained did not follow normalization, the non-parametric (non-normalised) data were analysed with a generalised linear regression model for Gaussian and Poisson distribution. Statistical analysis showed that the ozonation treatment of diuron/gabapentin followed the Gaussian model distribution and the degradation data obtained was proven significant using the Kruskal–Wallis test.

Synthesis of Cu-Doped TiO2 Nanocatalyst for the Enhanced Photocatalytic Degradation and Mineralization of Gabapentin under UVA/LED Irradiation: Characterization and Photocatalytic Activity

“…Additionally, the disposal of these therapeutic materials from the human body into the sewage will be another way of entering these micro-pollutants into aqueous environments [2,3]. Gabapentin (GBP) is widely used as an analgesic for kidney disorders and for treating neuropathic pain and epilepsy [4,5]. GBP has been detected at concentrations of up to 10 ηg/L, along with other drugs in raw wastewater, but the noteworthy point is that its destruction does not take place entirely, and no-metabolite structure can be dispersed in various solutions [6,7].…”

Técnicas De Remoção De Micropoluentes Emergentes Presentes Na Água: Uma Revisão Sistemática

“…Estudo desenvolvido com dosagens de ozônio 0.69 ± 0.01, 0.85 ± 0.03 e 0.95 ± 0.06 mgO3/L em sistema de semibatelada foi observado o ozônio residual por período de 60 a 100 segundos após a coleta da amostra. O sistema foi agitado a 85 rpm e acompanhamento de registro do pH (Goswami et al, 2019). Em parceria com as membranas cerâmicas, Stylianou et al (2015) utilizaram a ozonização para tratar compostos refratários, na qual as concentrações de ozônio na fase gasosa foram determinadas pelo método de iodeto, enquanto as concentrações de ozônio dissolvido foram mensuradas por método Indigo.…”

“…Sendo estudado em nove artigos do PB, 12 técnicas foram aplicadas para obtenção de eficiência, os herbicidas (G26), englobaram 27 MPE com média  90% em 48.5% das análises e predominância para a técnica de ozonização (Trapido et al, 2014;Brito et al, 2020;Goswami et al, 2019;Stylianou et al, 2015;Boucherie et al, 2010;Chen et al, 2017;Shu et al, 2013;Sanches et al, 2013;Acero et al, 2010).…”