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Zheng LL, Zhang J, Liu XZ, Tian L, Xiong ZS, Xiong X, Chen P, Wu DS, Zou JP. Degradation of pesticide wastewater with simultaneous resource recovery via ozonation coupled with anaerobic biochemical technology. CHEMOSPHERE 2022; 300:134520. [PMID: 35398067 DOI: 10.1016/j.chemosphere.2022.134520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 03/23/2022] [Accepted: 04/02/2022] [Indexed: 06/14/2023]
Abstract
The effective treatment of pesticide wastewater with high organic content, complex composition and high-toxicity has attracted enormous attention of researchers. This work proposes a new idea for removing the pesticide wastewater with simultaneous resource recovery, which is different from the traditional view of mineralization of pesticide wastewater via composite technology. This novel strategy involved a sequential three-step treatment: (a) acidic Ozonation process, to remove the venomous aromatic heterocyclic compounds; (b) hydrolysis and ozonation in alkaline conditions, enhancing the biodegradability of pesticide wastewater, mainly due to the dehalogenation, elimination of C=C bonds and production of low molecular-weight carboxylate anions; (c) the final step is anaerobic biological reactions. Based on the characterizations, this two-stage acidic-alkaline ozonation can efficiently degraded the virulence of pesticide wastewater and enhance its biodegradability from 0.08 to 0.32. The final anaerobic biochemical treatment can stably remove the residuals and convert the low molecular-weight organics into CH4, achieving the resource recovery. This work explored the pH-dependent of ozonized degradation of pesticide wastewater and gives a new perspective of wastewater treatment.
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Affiliation(s)
- Ling-Ling Zheng
- Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education, School of Resources & Environment, Nanchang University, Nanchang, 330031, PR China; Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Jun Zhang
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Xiao-Zhen Liu
- Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education, School of Resources & Environment, Nanchang University, Nanchang, 330031, PR China.
| | - Lei Tian
- Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education, School of Resources & Environment, Nanchang University, Nanchang, 330031, PR China; Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Zhen-Sheng Xiong
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Xin Xiong
- Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education, School of Resources & Environment, Nanchang University, Nanchang, 330031, PR China; Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Peng Chen
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, PR China
| | - Dai-She Wu
- Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education, School of Resources & Environment, Nanchang University, Nanchang, 330031, PR China
| | - Jian-Ping Zou
- Key Laboratory of Poyang Lake Environment and Resource Utilization of Ministry of Education, School of Resources & Environment, Nanchang University, Nanchang, 330031, PR China; Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang, 330063, PR China.
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Boivin S, Tanabe S, Fujioka T. Online evaluation of bacterial cells in sand filter effluents during full-scale treatment of drinking water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 814:152508. [PMID: 34968596 DOI: 10.1016/j.scitotenv.2021.152508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 06/14/2023]
Abstract
Ensuring the microbiological safety of drinking water is critical to protect public health. This study aimed to evaluate the reliability of real-time bacteriological counter coupled with an online dialysis membrane-based pre-treatment system for continuously monitoring bacterial cell counts in sand filter effluents of a full-scale drinking water treatment plant. The pre-treatment system, which included anion exchange resins (porous polymeric microbeads that trap ions for releasing other ions) for dialysate regeneration, successfully achieved the stable attenuation of background interfering substances (humic acids) during the 19-d test. The real-time bacteriological counter equipped with the pre-treatment system provided a continuous profile of bacterial cell counts in the sand filter effluent (0.2-2.5 × 104 counts/mL). The online analysis identified different timing of concentration peaks between particle and bacterial cell counts after backwashing. Bacterial community analysis revealed that Proteobacteria, Planctomycetes, and Cyanobacteria were the dominating phyla. Further, total bacterial cell counts determined by fluorescence microscopy and SYBR® Green I staining, a commonly accepted parameter, was found to be an indicator of online-monitored bacterial cell counts. The results indicated the potential of monitoring the bacterial cell counts in a sand filter process for providing an early warning of filter failures, which can allow plant operators to diagnose the overall system and provide countermeasures.
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Affiliation(s)
- Sandrine Boivin
- Graduate School of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Shuji Tanabe
- Graduate School of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
| | - Takahiro Fujioka
- Graduate School of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan.
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Li S, Xu Z, Alrobaian M, Afzal O, Kazmi I, Almalki WH, Altamimi ASA, Al-Abbasi FA, Alharbi KS, Altowayan WM, Singh T, Akhter MH, Gupta M, Rahman M, Beg S. EGF-functionalized lipid-polymer hybrid nanoparticles of 5-fluorouracil and sulforaphane with enhanced bioavailability and anticancer activity against colon carcinoma. Biotechnol Appl Biochem 2021; 69:2205-2221. [PMID: 34775646 DOI: 10.1002/bab.2279] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 10/30/2021] [Indexed: 12/19/2022]
Abstract
The present research work describes development of dual drug-loaded lipid-polymer hybrid nanoparticles (LPHNPs) of anticancer therapeutics for the management of colon cancer. The epidermal growth factor (EGF)-functionalized LPHNPs coloaded with 5-fluorouracil (FU) and sulforaphane (SFN) were prepared by one-step nanoprecipitation method. Box-Behnken design was applied for optimizing the material attributes and process parameters. The optimized LPHNPs revealed particle size 198 nm, polydispersity index 0.3, zeta potential -25.3 mV, and drug loading efficiency 19-20.3% for 5-FU and SFN, respectively. EGF functionalization on LPHNPs was confirmed from positive magnitude of zeta potential to 21.3 mV as compared with the plain LPHNPs. In vitro drug release performance indicated sustained and non-Fickian mechanism release nature of the drugs from LPHNPs. Anticancer activity evaluation in HCT-15 colon cancer cells showed significant reduction (p < 0.001) in the cell growth and cytotoxicity of the investigated drugs from various treatments in the order: EGF-functionalized LPHNPs > plain LPHNPs > free drug suspensions. Overall, the research work corroborated improved treatment efficacy of EGF-functionalized LPHNPs for delivering chemotherapeutic agents for the management of colon carcinoma.
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Affiliation(s)
- Shumin Li
- Department of Gastroenterology, Binzhou Central Hospital, Binzhou, Shandong Province, China
| | - Zhongkai Xu
- Department of Gastrointestinal Surgery, Jinan Central Hospital Affiliated to Shandong University, Jinan, Shangdong, China
| | - Majed Alrobaian
- Department of Pharmaceutics and Industrial Pharmacy, College of Pharmacy, Taif University, Taif, Saudi Arabia
| | - Obaid Afzal
- Department of Pharmaceutical Chemistry, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia
| | - Imran Kazmi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Waleed H Almalki
- Department of Pharmacology and Toxicology, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | | | - Fahad A Al-Abbasi
- Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Khalid S Alharbi
- Department of Pharmacology, College of Pharmacy, Jouf University, Sakakah, Saudi Arabia
| | - Waleed M Altowayan
- Department of Pharmacy Practice, College of Pharmacy, Qassim University, Qassim, Saudi Arabia
| | - Tanuja Singh
- University Department of Botany, Patliputra University, Patna, Bihar, India
| | | | - Manish Gupta
- Department of Pharmaceutical Sciences, School of Health Sciences, University of Petroleum and Energy Studies (UPES), Energy Acres, Bidholi, Via Premnagar, Dehradun, Uttarakhand, India
| | - Mahfoozur Rahman
- Department of Pharmaceutical Sciences, Shalom Institute of Health & Allied Sciences, Sam Higginbottom University of Agriculture, Technology & Sciences, Allahabad, India
| | - Sarwar Beg
- Department of Pharmaceutics, School of Pharmaceutical Education and Research, Jamia Hamdard, New Delhi, India
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