New organic compounds detection and potential removal in crude phosphoric acid using waste sludge

Some organic compounds in phosphoric acid are a potential mediator of adverse environmental impacts on soil. This work aims to detect and reduce the content crude using waste sludge, from water treatment plants, as low-cost sorbent. Gas chromatography/mass spectrometry (GC/MS) was used species acid, while X-ray fluorescence (XRF), Diffraction (XRD), scanning electron microscope equipped with energy-dispersive (SEM/EDAX) attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy were characterise sludges. Practically, three sludge samples (S1 El-Marg, S2 Al-Obour S3 El-Sheikh Zayed stations, respectively) utilised different factors including shaking time, sorbent dose concentration studied.The results GC/MS revealed that contains bis [tert-butyl(dimethyl)silyl] azelaate, dibutyl phthalate 2,6-di-tert-butyl-4-methylphenol main species. Moreover, clay surface charge strongly affect removal efficiency Kinetic analysis Lagergren pseudo-first-order, pseudo-second-order, Morris-Weber Elovich models displays sorption process sludges is chemisorption process. The capacity applied sorbents 26.3, 23.3 22.8 mg/g for S1, S3, respectively, which indicates exhibit clarification sequentially produce green phosphate fertilisers.