Water
·
2022
·Vol. 14
·期 7
·1044
·
IF 3.53
Miao Deng,Keming Wu,Tao Yang,Deyou Yu,Gaojie Liu,Shuai Gong,Dongni Sun,Michal Petru
The Electro-Fenton (E-Fenton) technique has shown great potential in wastewater treatment, while the sustainable and continuing supply of Fe2+remains challenging. Herein, we demonstrate the construction of a novel E-Fenton system by magnetically decorating zero-valent iron (ZVI) onto a RuO2-IrO2/Ti (ZVI-RuO2-IrO2/Ti) electrode for high-efficient treatment of pharmaceutical wastewater, which is considerably refractory and harmful to conventional biological processes. By using ZVI as a durable source of Fe(II) irons, 78.69% of COD and 76.40% of TOC may be rapidly removed by the developed ZVI-RuO2-IrO2/Ti electrode, while the ZVI-RuO2-IrO2/Ti electrode using ZVI only reduces 35.64% of COD under optimized conditions at initial COD and TOC values of 5500 mg/L and 4300 mg/L, respectively. Moreover, the increase in BOD5/COD from 0.21 to 0.52 highlights the enhanced biodegradability of the treated effluent. The analysis of a simultaneously formed precipitation on electrodes suggests that the coagulation process dominated by Fe3+/Fe2+also plays a non-negligible role in pharmaceutical wastewater treatment. In addition, the monitoring of the evolution of nitrogen elements and the formation of by-products in the E-Fenton process verifies its great capacity toward those organic pollutants found in pharmaceutical wastewater. Our study offers a practical solution for enhancing the performance of E-Fenton systems, and effectively treating refractory pharmaceutical wastewater.Keywords:electro-oxidation;zero-valent iron;pharmaceutical wastewater;E-Fenton process
研究领域:
环境科学
·
化学工程
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DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2024
·
IF 3.2
Dancheng Zhu,Yonghui Lin,Changhui Chen,Hao Xu,Jiabin Shen,Jun Qiao,Chao Shen
This paper reports the recovery and reuse of Pd ions from pharmaceutical wastewater using amino-modified Ti 3 C 2 . Ti 3 C 2 –NH 2 was synthesized by modifying (3-aminopropyl)triethoxysilane and the successful substitution of some surface functional groups of Ti 3 C 2 ; the decrease in material thickness was verified by characterization. This study revealed that the presence of amino groups significantly enhanced the Pd(II) adsorption capacity of Ti 3 C 2 . The effects of the adsorbent material, adsorbent dosage, pH, initial concentration of Pd ions, presence of competing cations, and contact time on the adsorption performance were investigated. The maximum adsorption capacity of 20 mg of Ti 3 C 2 –NH 2 was 986.65 mg/g in 100 ml of a Pd-ion solution with an initial concentration of 200 mg/l at pH 3. A pseudo-second-order kinetic model fitted well with the experimentally obtained rate data, indicating that the main mode of Pd-ion removal by Ti 3 C 2 –NH 2 was via chemical reduction. Finally, the catalyst exhibited excellent performances during the photocatalytic and Suzuki coupling reactions with yields of 81 % and 95 %, respectively. The results demonstrated that Ti 3 C 2 –NH 2 is an excellent material for adsorbing Pd ions and can effectively recycle these ions from pharmaceutical wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
Environmental Science-Water Research & Technology
·
2019
·Vol. 5
·期 4
·672-683
·
IF 4.195
Fangshu Qu,Hao Wang,Junguo He,Gongduan Fan,Zhihui Pan,Jiayu Tian,Hongwei Rong,Guibai Li,Huarong Yu
Permeability loss and the low retention efficiency of soluble organics significantly restrict the application of ultrafiltration (UF) for water reclamation. In this work, the tertiary treatment of secondary effluent using UF was investigated under a variety of transmembrane pressures (TMPs) (20–150 kPa) to obtain more insight into fouling by effluent organic matter (EfOM) and its impact on organic rejection, particularly for hydrophobic pharmaceuticals represented by carbamazepine and naproxen. The flux decline and the reversible fouling during secondary effluent filtration were substantially aggravated with increasing TMP, whereas the irreversible fouling was generally reduced, as attributed to restriction of EfOM adhesion to the membrane surface by the fouling layer. The fouling process was successively dominated by pore blocking and cake layer filtration, and the shift in the dominant mechanism was accelerated under higher TMPs. The rejection of EfOM was improved in the presence of a fouling layer, which acted as a secondary filtration medium, particularly at higher TMPs. The maximum rejection of hydrophobic pharmaceuticals by UF was observed in a moderate TMP range (40–60 kPa), probably due to a trade-off between increased fouling layer retention and reduced rejection due to increased wall shear and aggravated cake-enhanced concentration polarization with increasing TMP. The results would encourage the strategy of utilizing the fouling layer for irreversible-fouling restriction and better rejection of hydrophobic PhACs.
研究领域:
环境科学
·
水处理工程
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产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Huidong Liu,Guoren Xu,Guibai Li
In this study, the specific surface area, pore structure, surface functional groups and microstructure of the biochar derived from the pyrolysis of pharmaceutical sludge are analyzed. The results showed that the pyrolysis temperature had a great influence on the properties of sludge-based biochar (SBB), and the specific surface area of the SBB first increased and then decreased with an increase in the pyrolysis temperature. The maximum specific surface area was 214.97 m 2 /g at 600 °C, while the pore volume increased with an increase in the pyrolysis temperature. The pickling process removed impurities in the SBB and increased the specific surface area of the material (319.80 m 2 /g). The effects of pyrolysis temperature, pH, adsorption time, and initial pollutant concentration on the adsorption process were also studied. The results showed that the adsorbents had good pH adaptability, and biochar produced at 600 °C had the best adsorption capacity (94.69 mg/g). Pickling increased the adsorption capacity to 157.38 mg/g. The results showed that pharmaceutical sludge has great potential as a raw material for the preparation of adsorbent. These benefits can compensate for the cost of sludge pyrolysis treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Science & Engineering C-Materials for Biological Applications
·
2017
·
IF 4.164
Long Huang,Meiying Liu,Liucheng Mao,Qiang Huang,Hongye Huang,Qing Wan,Jianwen Tian,Yuanqing Wen,Xiaoyong Zhang,Yen Wei
As a new type of mesoporous silica materials with large pore diameter (pore size between 2 and 50 nm) and high specific surface areas, SBA-15 has been widely explored for different applications especially in the biomedical fields. The surface modification of SBA-15 with functional polymers has demonstrated to be an effective way for improving its properties and performance. In this work, we reported the preparation of PEGylated SBA-15 polymer composites through surface-initiated chain transfer free radical polymerization for the first time. The thiol group was first introduced on SBA-15 via co-condensation with γ-mercaptopropyltrimethoxysilane (MPTS), that were utilized to initiate the chain transfer free radical polymerization using poly(ethylene glycol) methyl ether methacrylate (PEGMA) and itaconic acid (IA) as the monomers. The successful modification of SBA-15 with poly(PEGMA- co -IA) copolymers was evidenced by a series of characterization techniques, including 1 H NMR, FT-IR, TGA and XPS. The final SBA-15-SH- poly(PEGMA- co -IA) composites display well water dispersity and high loading capability towards cisplatin (CDDP) owing to the introduction of hydrophilic PEGMA and carboxyl groups. Furthermore, the CDDP could be released from SBA-15-SH-poly(PEGMA- co -IA)-CDDP complexes in a pH dependent behavior, suggesting the potential controlled drug delivery of SBA-15-SH-poly(PEGMA- co -IA). More importantly, the strategy should be also useful for fabrication of many other functional materials for biomedical applications owing to the advantages of SBA-15 and well monomer adoptability of chain transfer free radical polymerization.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Chao Liu,Yongqiang Guo,Yi Zhou,Bo Yang,Ke Xiao,Hua-Zhang Zhao
Membrane fouling is the vulnerable point of polyamide (PA) reverse osmosis (RO) membranes in industrial wastewater treatment (especially pharmaceutical plant effluent). The deposition and adsorption of foulants on the PA layer greatly reduce the permeability selectivity of the membrane and increase maintenance costs. In this work, a simple irradiation strategy was used to graft hydrophilic polymers on the membrane surface without any catalysts and initiators, and an excellent hydrophilic and antifouling modified RO membrane was developed. The successful introduction of Poly(vinyl alcohol) (PVA) onto RO membrane surface was confirmed through systematic surface characterization (13C NMR, ATR-FTIR, XPS, SEM, and AFM). The membrane M−2 with a PVA modifier concentration of 1.0% has remarkable hydrophilic properties (water contact angle of 24.93°) and excellent separation efficiency (salt rejection up to 99.4%). The antifouling property of the modified membrane is significantly enhanced due to the synergistic effect of the hydrophilic component and the roughness. In the bovine serum albumin (BSA) antifouling tests, the irreversible flux decline rate (DRir) of membrane M−2 was as low as 1.7% and the flux recovery ratio (FRR) values increased from 87.6% to 98.3% compared to pristine membrane. Importantly, the membrane modified with PVA shows a high foulant removal efficiency (COD > 99.5%) in the actual pharmaceutical plant effluent treatment, and the performance is stable after continuous operation for 28 days. The proposed simple co-grafting strategy also opens up new possibilities for the optimization or modification of other membranes (e.g., nanofiltration and ultrafiltration). Simultaneously, the prepared modified membrane has stable performance, simple and efficient method, and can also be applied in desalination and other industrial wastewater treatment fields.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Haifeng Lu,Liang Zhang,Hui Du,Xiaolei Guo,Haifeng Liu
Continuous manufacturing has intrigued many researchers in the pharmaceutical industry in the post-COVID-19 world. We experimentally studied the discharge characteristics of pharmaceutical excipients under vibrational excitation. The successful accurate dosing and filling of powders at fill rates of 0.6–15 mg/s was developed. A simple particle model includes fluid-grain coupling which is relevant to Faraday tilting resulting from gas trapped in the powder bed accurately predicts the discharge rate. A novel continuous micro mixing system was designed based on the discharge model. Any specified proportions can be realized by setting appropriate vibration parameters. The low variability (<2.5 %) in the content of components has verified the reliability of the mixing system. The continuous mixing performance was determined by the discharge characteristics. Yet the particle size distribution and cohesion lead to different mixing performances when the stability of micro feeding is satisfied. Reasonable process parameters for continuous mixing are determined and optimized.
研究领域:
制药工程
·
粉末力学
·
连续制造
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jing Wang,Yakun Teng,Shushu Jia,Wenyan Li,Tianyi Yang,Ya Cheng,Hao Zhang,Xiang Li,Lijuan Li,Ce Wang
The successful development of a cost-effective and efficient adsorbent is crucial for the optimal treatment of pharmaceutical sewage. In this study, a UiO-66(Hf)–NH 2 nanocrystal modified composite nanofiber membrane (HfPNFM) was synthesized through electrospinning and solvothermal techniques, for the removal of salicylic acid (SA). The in-situ growth of UiO-66(Hf)–NH 2 on the nanofibers led to a significant increase in the specific surface area of the composite nanofiber membrane. Furthermore, HfPNFM demonstrated exceptional flexibility and reusability, with the removal efficiency of SA still at 96.85 % even after ten cycles. The adsorption process of SA onto HfPNFM was well described by the pseudo-second-order kinetic model and Langmuir isotherm model, with a maximum adsorption capacity of 128.21 mg/g. In dynamic adsorption experiments, HfPNFM effectively removed 100 % of SA at a concentration of 50 mg/L. The chemical oxygen demand (COD) concentration of SA was reduced from 165.89 mg/L to 41.47 mg/L by two layers of HfPNFM filtration, below the standard for pharmaceutical wastewater discharge (GB: 21904-2008). X-ray photoelectron spectroscopy (XPS) revealed that electrostatic interactions, π-π interactions, hydrogen bond interactions, and metal complexation interactions between SA and HfPNFM were responsible for the adsorption. This highly effective composite nanofiber membrane has promising potential for pharmaceutical wastewater treatment.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Mushi Li,Xi Wang,Mingyu Ma,Juan Wu,Yang Chen,Jinbao Ou,Xinyue Chen,Qianying Zhou,Wenjing Sang,Shihong Xu,Li Cai,Dengxin Li
This study focused on the treatment of high-concentration pharmaceutical wastewater with high-salinity by pretreatment of chemical synthesis coupling with evaporation. Via chemical synthesis, this pretreatment process was developed to remove the organic matter that inhibited evaporation of wastewater, resulting in improved evaporation efficiency. Lab-scale results demonstrated that under the optimum conditions (∼pH 9, 2 mL/L demulsifier, 98 mM/L H 2 O 2 , 3 h of aeration time, 80 °C, 500 mg/L PAC, and 20 mg/L PAM), 54.9 % of COD was successfully removed by single pretreatment and 98.6 % after coupling with evaporation. Compared to the 80.1 % COD removal efficiency of direct evaporation of 100 mL with 30 min, the pretreatment process coupling with evaporation demonstrated superior performance and halved the evaporation time. A pilot-scale chemical synthesis pretreatment (120 t/d) was further developed to treat pharmaceutical wastewater of both high COD concentrations and high salinity. Under the optimal conditions determined in the lab-scale experiments, the pilot-scale achieved a COD removal efficiency of 49 % with a single pretreatment and 95.8 % after coupling with mechanical vapor recompression (MVR). Additionally, the obtained salt appeared visually clean and white compared to that obtained from the treated wastewater without pretreatment. Furthermore, to elucidate the possible mechanisms driving the efficient removal of COD, GC–MS was performed on the wastewater before and after pretreatment, and the resulting products from pretreatment in pilot-scale applications were further determined by both FTIR and GC–MS. It was proposed that the aldol condensation reaction increased the formation of carbon chains to macromolecular compounds might be the possible mechanism. This study gives insights into the future application of low-investment and low-cost technology in the treatment of high-concentration pharmaceutical wastewater with high salinity in industry.
研究领域:
环境工程
·
化工技术
·
废水处理
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DOI
高影响因子
Micromachines
·
2016
·Vol. 7
·期 11
·194
·
IF 1.295
Zhixin Zhang,Zifan Tang,Wenpeng Liu,Hongxiang Zhang,Yao Lu,Yanyan Wang,Wei Pang,Hao Zhang,Xuexin Duan
Controlled drug release has a high priority for the development of modern medicine and biochemistry. To develop a versatile method for controlled release, a miniaturized acoustic gigahertz (GHz) resonator is designed and fabricated which can transfer electric supply to mechanical vibrations. By contacting with liquid, the GHz resonator directly excites streaming flows and induces physical shear stress to tear the multilayered polyelectrolyte (PET) thin films. Due to the ultra-high working frequency, the shear stress is greatly intensified, which results in a controlled disassembling of the PET thin films. This technique is demonstrated as an effective method to trigger and control the drug release. Both theory analysis and controlled release experiments prove the thin film destruction and the drug release.Keywords:controlled drug release;layer-by-layer (LbL);bulk acoustic resonator;MEMS
研究领域:
生物医学工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yingfei Wang,Junhui Zhou,Fengliang Wang,Yi Xie,Shengwei Liu,Zhimin Ao,Chuanhao Li
Degrading organic pollutants while generating hydrogen from water splitting is an ideal application of photocatalysis. Herein, we presented an efficient photocatalyst, oxygen-doped crystalline carbon nitride, to power the degradation of various kinds of pharmaceuticals and personal care products and the simultaneous hydrogen production. The highest efficiency was achieved in treating the simulated wastewater containing naproxen (NPX), with the H 2 evolution rate of 819.1 µmol/g/h and the NPX degradation efficiency of 92 % upon visible light irradiation. Experimental and computational results suggested that the doped oxygen atoms thermodynamically favored the generation of hydroxyl peroxide for pollutant degradation and lowered the energy barrier of H 2 O reduction to produce hydrogen fuel. Most importantly, the catalysts functioned well in the natural aquatic environment including sea water, sewage water, river water, and well water. This study provides fundamental insights into photocatalytic water treatment with simultaneous hydrogen production, indicating an energy-recovering approach for wastewater treatment.
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2024
·
IF 11.4
Haichuan Zhang,Jiawei Li,Shanshan Ye,Xiyang Zou,Rongxin Fei,Xinyu Hu,Ji Li
The electro-peroxone (EP) process encounters two inherent challenges in wastewater treatment: sluggish O 2 /O 3 transfer and substantial ozone waste. To overcome these limitations, we introduced micro-nano bubbles (MNBs) aeration to enhance O 2 /O 3 dissolution and diffusion, ultimately aiming to improve the removal of trace pharmaceutical contaminants from hospital wastewater. In the MNBs aeration system, the ozone transfer coefficient ranging from 0.536 to 0.265 min −1 , significantly surpassing that of conventional aeration (0.220 to 0.090 min −1 ) by approximately 2 to 4.5 times. Consequently, the EP process under MNBs aeration significantly enhanced ozone-resistant ibuprofen (IBU) removal, achieving a removal rate of 98.4 ± 1.5 %, far exceeding the 47.3 ± 4.7 % observed with conventional aeration. This significant improvement was attributed to the heightened production of hydroxyl radicals (•OH), reaching 0.97 × 10 −9 M s, compared to only 0.28 × 10 −9 M s in conventional aeration. The mechanism behind the enhanced •OH production in the MNBs-EP process relied primarily on two factors: improved O 2 /O 3 dissolution due to high internal pressure/large surface and enhanced O 3 /H 2 O 2 activation from high collapse energy. These factors together contributed to the robust oxidation capability of the MNBs-EP system. As a result, over 97 % removal efficiency was achieved for five representative pharmaceutical pollutants (sulfamethoxazole, ribavirin, norfloxacin, tetracycline and ampicillin) in just 1 min. Furthermore, when applied to real hospital wastewater, the MNBs-O 3 -E treatment system reduced all 15 detected trace pharmaceutical compounds to below 10 ng L −1 and achieved 14 types of pollutants with removal rates of over 85 % within 15 min, resulting in an ultrahigh total removal rate of 98.6 %, from an initial total concentration of 2108 ng L −1 to less than 30 ng L −1 . Thus, micro-nano aeration endowed the EP process as a promising advanced oxidation system for rapid and highly-effective removal of trace pharmaceutical contaminants from hospital wastewater.
研究领域:
环境科学
·
水处理技术
·
高级氧化工艺
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）