Mechanistic insight on the sonolytic degradation of phenol at interface and bulk using additives

Abstract

Present work investigated the degradation of phenol based on theoretical knowledge of bubble dynamic and experimental studies. Optimum parameters of theoretical knowledge such as initial concentration of phenol: 1.1 mole/L; concentration of additive: 2 g/L; liquid medium temperature: 35°C and pressure of liquid medium: 101325 Pa were considered for the experimental study. The degradation was further explored in the presence of zinc oxide (effect of particle size), hydrogen peroxide (effect on hydroxyl radical concentration), and sodium chloride (effect of a change in liquid properties) and its effect on degradation of phenol. The degradation of phenol increased in the presence catalyst such as 0.61±0.013 moles L

A review on pesticide degradation from irrigation water and techno‐economic feasibility of treatment technologies

“…These processes have high operating costs due to expensive catalysts and Fenton reagent. UC consumes higher energy for the treatment; hence, these processes have less commercial viability (Doltade & Gole, 2017). As mentioned in the earlier section of this review, the use of HC has proved its potential in the pesticide degradation as well as in microbial killing at pilot-scale and commercial study.…”

Novel hydrodynamic cavitation based hand pump for disinfection of groundwater

“…A sufficiently small injury to cell wall of pathogens is enough to kill the bacteria and fungi. The potential of cavitation as an advanced oxidative method in treating waste water are well known (Doltade et al., 2017, 2019; Doltade & Gole, 2017; Gogate & Pandit, 2004; Saharan et al., 2014; Sivasankar & Moholkar, 2009a, 2009b). Currently, centrifugal and positive displacement pump based designs of hydrodynamic cavitational reactors are available and have been reported for different purposes (Gogate & Pandit, 2004, 2005).…”

“…The modification in the geometry of the existing lower check valve causes hydrodynamic cavitation. Cavitation is a phenomenon of nucleation, growth, and collapse of gaseous/vapor cavities leading to localized high temperature (4000-5000 K) and pressure pulses (10-15 MPa) leading to the disruption of the microbial cells (Doltade et al, , 2019Doltade & Gole, 2017). The actual disintegration of microorganisms occurs due to two mechanisms 474 DOLTADE AND PANDIT 1) Intensive collapse of the cavity which produces high shear stress in the bulk and 2) The high velocity of micro jets generated during the asymmetric collapse of the cavities (Badve, Bhagat, et al, 2015;Chaudhuri et al, 2020;Doltade et al, 2019).…”