Degradation of chloramphenicol using a combination system of simulated solar light, Fe2+ and persulfate

Nie, Minghua; Yan, Caixia; Xiong, Xiaoying; Wen, Xinmei; Yang, Xue; Lv, Zelan; Dong, Wenbo

doi:10.1016/j.cej.2018.04.124

Cited by 96 publications

(21 citation statements)

References 51 publications

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“…The presence of Cu 2+ could play an effective role in the decomposition of intermediate products and further mineralization in the process. These similar results were reported in the previous study of a solar/Fe/PS system (Nie et al , 2018). More, the effect of Cu 2+ concentration in different amounts (0.1, 0.2 and 0.5 mM/L) was also investigated during the process (Figure 7).…”

Section: Resultssupporting

confidence: 92%

Enhancement of PMS activation in an UV/ozone process for cyanide degradation: a comprehensive study

Chegini

Hassani

Torabian

et al. 2020

PRT

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Purpose This paper aims to study peroxymonosulfate (PMS) activation in the ultraviolet (UV)/ozone process for toxic cyanide degradation from aqueous solution by a novel and simple method. Design/methodology/approach Photocatalytic degradation of cyanide (CN-) was carried out using a bench-scale photoreactor. Optimization of the UV/ozone process for the highest removal of cyanide was obtained. The effect of parameters such as ozone concentration, PMS concentration, temperature, cations (Cu2+, Co2+ and Fe2+), cyanide concentration, anions (bicarbonate, carbonate, chloride, nitrite, nitrate and sulfate [SO42−]) and scavengers (ethanol [EtOH], humic acid, TBA and NaN3) was investigated for CN- degradation. Findings Complete removal of 50 mg/L cyanide was obtained in 4 min in an ozone/UV/PMS process. The cyanide removal increased from 49.3% to 100% by adding the persulfate dosage up to 100 mg/L. The effect of various cations (II) on the cyanide degradation was enhanced in the order Cu2+ > Co2+ > Fe2+. Hydroxyl radical based on different radical quenchers such as salicylic acid proved as the main oxidizing radical for oxidation. The application of ozone/UV/PMS to treat wastewater containing cyanide shows high degradation efficiency. Research limitations/implications The ozone/UV/PMS system could be a process for degradation and detoxification of cyanide. Practical implications This study provided a simple and effective method for degradation of cyanide from aqueous solution. This method was applicable to protect environment from a huge amount of toxic cyanide wastewater produced by different industrial processes. Originality/value The PMS activation is done via a simple and effective method, which is carried out with the ozone/UV system. There are two main innovations. One is that the novel catalytic role of bimetallic ions in the ozone reaction with cyanide and the further decomposition of intermediate products is investigated. The other is that the optimized conditions were obtained for the removal of cyanide as a water contaminant. Furthermore, predominant oxidizing species by PMS activation are identified.

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Section: Resultssupporting

confidence: 92%

Enhancement of PMS activation in an UV/ozone process for cyanide degradation: a comprehensive study

Chegini

Hassani

Torabian

et al. 2020

PRT

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“…Thus, the studied TCAP system is very sensitive to pH variations. These results can be compared to a solar/Fe 2+ /PS system investigated by Nie et al 46 In fact, the authors found a decrease in the degradation rate of chloramphenicol by around 70% when the reaction pH increased from 3 to 9.…”

Section: Effects Of Ph Adjustment Of the Tcap Systemmentioning

confidence: 64%

Chemically and thermally activated persulfate for theophylline degradation and application to pharmaceutical factory effluent

et al. 2019

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“…Zhang et al (2007) suggested that D 14 (AMCl) is less toxic in nature towards microorganisms and could be easy biodegradable. The reduction of CHPL to D 14 would have environmental significance in terms of antibiotic elimination for the generation of antibiotic-resistant bacteria/genes in the environments (Nie et al 2018). This observation strongly recommended that the final D 14 has much less antibacterial activity than CHPL.…”

Section: Proposed Mechanistic Routes For Chpl Degradationmentioning

confidence: 99%

“…The toxicity of CHPL and its decomposition products in UPV to E. coli in LB media (10 g peptone þ5 g Yeast extract þ5 g NaCl þ10 g Agar) after 24 h of exposure was shown in Figure 7. Pathogen E. coli, as the gram-negative bacteria is highly sensitives towards CHPL (Nie et al 2018). The activity of E. coli was measured in the CHPL solution in UVP treatment under optimal conditions.…”

Section: Antimicrobial Activity Of Chpl and Its Degradation Productsmentioning

confidence: 99%

Kinetics, degradation mechanisms and antibiotic activity reduction of chloramphenicol in aqueous solution by UV/H2O2 process

Giri

Golder

Chakma

2021

Water Science and Technology

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In this study, the aim was to explore the effectiveness of the UV/H2O2 photolysis (UVP) process in terms of antimicrobial activity reduction and increasing the mean oxidation number of carbon (MONC) under the degradation of chloramphenicol (CHPL) drug. CHPL degradation kinetics and the effects of foreign anions on CHPL degradation were explored in this study. The order of the inhibition effect was found as Cl− > NO3− > HCO3− due to their different in HO• radical scavenging capacity. A pseudo-first-order model for CHPL degradation was well established, and the rate constant (kobs) was 2.93 × 10−2 min−1 (R2 = 0.98) in UVP. Thirteen intermediate products were detected in MS-chromatogram and were identified through different proposed degradation pathways. The cleavage of the amide side chain in CHPL was more effective in CHPL degradation due to an electrophilic attacks by HO. radicals on it. The inactivation rates of E. coli were decreased due to the reduction of -NO2 group into -NH2 functional group in CHPL that leads to the production of low toxic compounds on CHPL degradation.

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Degradation of chloramphenicol using a combination system of simulated solar light, Fe2+ and persulfate

Cited by 96 publications

References 51 publications

Enhancement of PMS activation in an UV/ozone process for cyanide degradation: a comprehensive study

Enhancement of PMS activation in an UV/ozone process for cyanide degradation: a comprehensive study

Chemically and thermally activated persulfate for theophylline degradation and application to pharmaceutical factory effluent

Kinetics, degradation mechanisms and antibiotic activity reduction of chloramphenicol in aqueous solution by UV/H2O2 process

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