Hybrid coagulation, gamma irradiation and biological treatment of real pharmaceutical wastewater

Changotra, Rahil; Rajput, Himadri; Guin, Jhimli Paul; Varshney, Lalit; Dhir, Amit

doi:10.1016/j.cej.2019.03.256

Cited by 65 publications

(17 citation statements)

References 34 publications

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“…Meanwhile, the presence of supercritical water oxidants can result in a total transformation. Changotra, Rajput, Guin, Varshney, and Dhir (2019) conducted pharmaceutical wastewater treatment of low organic strength (LSW) and high organic strength (HSW), using the hybrid approach. The approaches chosen were biological, coagulation, and gamma-irradiation treatment.…”

Section: Pharmaceutical Wastewatermentioning

confidence: 99%

Chemical waste and allied products

Hung

Aziz

Ramli

et al. 2020

Water Environment Research

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Section: Pharmaceutical Wastewatermentioning

confidence: 99%

Chemical waste and allied products

Hung

Aziz

Ramli

et al. 2020

Water Environment Research

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“…In hydrated electron reactions, electron adduct is formed then it underwent protonation yielding cyclohexadienyl type radical [53]. The treatment of real pharmaceutical effluent using combined process of coagulation, biological treatment, and γ irradiation was investigated [54]. Two tested neutral effluents, namely, low organic strength (LSW; BOD < 6730 ppm, COD < 12,715 ppm) and high organic strength (HSW; BOD < 27,242, COD < 51,223 ppm).…”

Section: Advances In Pharmaceutical and Petrochemical Wastewater Treamentioning

confidence: 99%

“…As presented in the previous sections, the technical performance of the application of ionizing radiation technology in wastewater treatment is effective in disinfection and reduces the bio-refractory nature of several persistence organic pollutants. Several studies proved the economical feasibility of the e-beam and γ irradiation technologies [21,32,41,48,51,[54][55][56][57][58][59][60][61][62][63]. For e-beam technology, the capital costs include the accelerator price, building shield, conveyer, cooling and ventilation systems, and monitoring system [57].…”

Section: Sustainability Of the Technologymentioning

confidence: 99%

“…The values of the coefficients b and d varied with time due to the evolution and advances in the manufacturing process [48]. On the other hand, the costs of γ irradiator are not accompanied by power consumption [54], where γ source irradiate spontaneously. The average cost (ATC, k$/m 3 ) of this irradiation technique is determined based on the price of the used radioactive source (R, k$/C i ), required activity (I, C i ), irradiation time (t, h) and half life (t 0.5 , h), and the irradiation chamber volume (v, m 3 )…”

Section: Sustainability Of the Technologymentioning

confidence: 99%

“…Similar data are not available for γ irradiation. To compare the cost of this technique alone and cost of this technology combined with coagulation, the data reported by Changotra et al [54] were plotted for two types of industrial effluents (Figure4). There are some technical and non-technical issues that need to be resolved to ensure the sustainability of using this technology.…”

Section: Sustainability Of the Technologymentioning

confidence: 99%

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Technological applications of nuclear science and technology in different sectors have proved their reliabilities and sustainability over decades. These applications have supported various human civilization needs, ranging from power generation to industrial, medical, and environmental applications. Environmental applications of radiation sources are used to support decision making processes in many fields; including the detection and analysis of pollutant transport, water resources management, and treatment of municipal and industrial wastewaters. This work reviewed recent advances in the research and applications of ionizing radiation in treating different wastewater effluents. The main objective of the work is to highlight the role of ionizing radiation technology in the treatment of complex wastewater effluents generated from various human activities and to address its sustainability. Results of both laboratory and industrial scale applications of this treatment technology have been reviewed, and information on operational safety of industrial irradiators, which affect the sustainability of this technology, has been summarized.

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Facile Fabrication of Novel SrMoO₄/g‐C₃N₄ Hybrid Composite for High‐Performance Photocatalytic Degradation of Dye Pollutant under Sunlight

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The exploitation of the efficient hybrid composite materials for environmental remediation is highly demanding area. In the present work, pristine SrMoO 4 (SMO), g-C 3 N 4 (G-CN) and SrMoO 4 /g-C 3 N 4 (SMO/G-CN) hybrid composite materials have been synthesized for the first time by facile mixing and heating methodology. The fabricated materials are subsequently characterized by various spectroscopic techniques. Phase analysis was carried out by PXRD study as well as morphology and elemental analysis were investigated by FE-SEM, EDS and XPS studies. The thermal stability of synthesized materials was determined by TGA as well as optical properties were confirmed by UV-Vis DRS and PL studies, electrochemical analysis by EIS studies. The results reveals the optimized SMO/ G-CN-10 composite photocatalyst exhibits superior performance for the photocatalytic degradation of Rhodamine B (Rh B) dye under direct sunlight irradiation and rate of photocatalytic efficiency of SMO/G-CN-10 (0.0976 min À 1 ) is 4 and 40 times higher as compared to those of pure G-CN (0.0245 min À 1 ) and SMO (0.0024 min À 1 ) respectively. Good interfacial interactions between the G-CN and SMO in SMO/G-CN-10 composite helps in the separation and efficient transfer of photo-induced excitons by inhibiting the recombination of excitons. The trapping experiment results reveals that O 2 * À are the major reactive species. It was noted that our composite SMO/G-CN-10 is found to be stable even after four successive runs. Furthermore a suitable mechanism has been proposed for its enhanced photocatalytic activity. Altogether, in the present investigation, a new route for the synthesis of efficient visible light active photocatalysts has been reported which is not only beneficial for environmental remediation applications but might also be used for the water splitting and CO 2 reduction.

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Hybrid coagulation, gamma irradiation and biological treatment of real pharmaceutical wastewater

Cited by 65 publications

References 34 publications

Chemical waste and allied products

Chemical waste and allied products

Application of Ionizing Radiation in Wastewater Treatment: An Overview

Facile Fabrication of Novel SrMoO₄/g‐C₃N₄ Hybrid Composite for High‐Performance Photocatalytic Degradation of Dye Pollutant under Sunlight

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Hybrid coagulation, gamma irradiation and biological treatment of real pharmaceutical wastewater

Cited by 65 publications

References 34 publications

Chemical waste and allied products

Chemical waste and allied products

Application of Ionizing Radiation in Wastewater Treatment: An Overview

Facile Fabrication of Novel SrMoO4/g‐C3N4 Hybrid Composite for High‐Performance Photocatalytic Degradation of Dye Pollutant under Sunlight

Contact Info

Product

Resources

About

Facile Fabrication of Novel SrMoO₄/g‐C₃N₄ Hybrid Composite for High‐Performance Photocatalytic Degradation of Dye Pollutant under Sunlight