pharmaceutical wastewater
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2022 ◽  
Vol 429 ◽  
pp. 132176
Author(s):  
Yingshi Zhu ◽  
Fengxia Deng ◽  
Shan Qiu ◽  
Fang Ma ◽  
Yanshi Zheng ◽  
...  

Molecules ◽  
2021 ◽  
Vol 27 (1) ◽  
pp. 237
Author(s):  
Mahdi Shahriarinour ◽  
Faten Divsar ◽  
Fereshteh Kamalpour Dahka ◽  
Sharareh Nezamivand Chegini ◽  
Mohamad Mahani ◽  
...  

The release of pharmaceutical wastewaters in the environment is of great concern due to the presence of persistent organic pollutants with toxic effects on environment and human health. Treatment of these wastewaters with microorganisms has gained increasing attention, as they can efficiently biodegrade and remove contaminants from the aqueous environments. In this respect, bacterial immobilization with inorganic nanoparticles provides a number of advantages, in terms of ease of processing, increased concentration of the pollutant in proximity of the cell surface, and long-term reusability. In the present study, MCM-41 mesoporous silica nanoparticles (MSN) were immobilized on a selected bacterial strain to remove alprazolam, a persistent pharmaceutical compound, from contaminated water. First, biodegrading microorganisms were collected from pharmaceutical wastewater, and Pseudomonas stutzeri was isolated as a bacterial strain showing high ability to tolerate and consume alprazolam as the only source for carbon and energy. Then, the ability of MSN-adhered Pseudomonas stutzeri bacteria was assessed to biodegrade alprazolam using quantitative HPLC analysis. The results indicated that after 20 days in optimum conditions, MSN-adhered bacterial cells achieved 96% biodegradation efficiency in comparison to the 87% biodegradation ability of Pseudomonas stutzeri freely suspended cells. Kinetic study showed that the degradation process obeys a first order reaction. In addition, the kinetic constants for the MSN-adhered bacteria were higher than those of the bacteria alone.


Author(s):  
. Simran ◽  
Nishant Thakur ◽  
Karishma Mahajan

Toxic and difficult to biodegrade pharmaceutical wastewater is complex in composition with high concentrations of organic debris and microorganisms. There may still exit quantities of suspended particles and dissolved organic materials even after further treatment. Advanced treatment is required to improve the quality of pharmaceutical wastewater discharge. In this study, the pharmaceutical technology categorization has been established, and the features of pharmaceutical wastewater effluent quality have been summarized. On the other hand, The methods of advanced treatment of pharmaceutical wastewater have been incorporate, including coagulation and sedimentation, flotation, activated carbon adsorption, membrane separation, advanced oxidation processes, membrane separation, and biological treatment. In the meanwhile, each process's features were specified.


2021 ◽  
pp. 37-63
Author(s):  
Sadaf Ahmad ◽  
Bakar bin Khatab Abbasi ◽  
Muhammad Shahid Nazir ◽  
Mohd Azmuddin Abdullah

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yan Cao ◽  
Ali Taghvaie Nakhjiri ◽  
Mahdi Ghadiri

AbstractIn the present study, a mathematical modelling was developed to investigate ibuprofen adsorption from pharmaceutical wastewater into activated carbon and sonicated activated carbon. The developed model was dissolved based on the finite element method. Effect of different operating parameters including particle porosity and diameter as well as ibuprofen diffusion coefficient in solution on the amount of ibuprofen adsorption at different time point and position in the particle were evaluated. It was found good agreement between experimental values and modelling results in terms of ibuprofen adsorption as a function time. The 84.5% and 92.5% of maximum adsorption was achieved for the AC and SAC at the centre of particle after 150 min. Increasing the particle porosity and ibuprofen diffusion coefficient was improved the ibuprofen adsorption into the adsorbent. However, the particle diameter had negative impact on the system performance. There was a decrease in solute adsorption from 84.10 to 7.30 mg/g and from 106 to 15.73 mg/g for the AC and SAC respectively with increasing the particle radius from 173 to 500 µm. Finally, it was concluded that the particle specifications play important role in the adsorption process as it was observed considerable change in the amount of adsorption at different positions in the particle with changing the particle specifications.


2021 ◽  
Vol 44 ◽  
pp. 102353
Author(s):  
Amin Ansari ◽  
Mahmood Masoudi Khoram ◽  
Davood Nematollahi ◽  
Ghasem Azarian ◽  
Ehsan Niknam ◽  
...  

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