SCIENCE OF THE TOTAL ENVIRONMENT
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2024
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IF 8.2
Denglong Lu,Yang Song,Huanying Ge,Hongjia Peng,Haipu Li
Large amounts of waste activated sludge are generated daily worldwide, posing significant environmental challenges. Anaerobic fermentation is a promising method for sludge disposal, but it has two technical bottlenecks: the availability of short-chain fatty acids (SCFAs)-producing substrates and SCFAs consumption by methanogenesis. This study proposes a pretreatment strategy combining sodium percarbonate (SPC) and magnetite (Fe 3 O 4 ) to address these issues. Under optimized conditions (20 mg Fe 3 O 4 /g TSS and 15 mg SPC/g TSS), SCFAs production increased to 3244.10 ± 216.31 mg COD/L, about 3.06 times the control (1057.29 ± 35.06 mg COD/L) and surpassing reported treatments. The combined pretreatment enhanced the disruption of extracellular polymeric substances, increased the release of biodegradable matters, improved acidogenesis enzyme activities, and inhibited methanogenesis. Additionally, it increased NH 4 + -N release in favor of the recovery of phosphorus from sludge residual. This study demonstrates an efficient pretreatment for high SCFAs production and resource recovery from WAS.
研究领域:
环境工程
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生物技术
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废物管理
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Qian Wang,Jingfeng Gao,Hao Chen,Ying Liu,Xiaoyu Fu,Jiawen An,Hanyi Wang,Yuxuan Wang
Antibiotic resistance has turned into a focus of universal public health concern. Wastewater treatment plants are considered as reservoirs of antibiotic resistant bacteria (ARB) and antibiotic resistant genes (ARGs), which can be transmitted to the environment. In this research, an effective method for inactivating Escherichia coli DH5α ( E. coli DH5α) carrying resistance genes was developed utilizing dual oxidant system of peroxymonosulfate (PMS) and sodium percarbonate (SPC) in the presence of ferrous ions (Fe(II)). The results indicated that E. coli DH5α could be inactivated 6.36 log under the conditions of 0.50 mM PMS, 0.50 mM SPC and 0.50 mM Fe(II) after 30 min. Besides, the removal of different types of ARB and pollutants could also be achieved by Fe(II)/PMS/SPC system. The quenching experiments and EPR analysis demonstrated that reactive species (•OH, SO 4 •− , O 2 •− , 1 O 2 and CO 3 •− ) involved in the inactivation of E. coli DH5α. Bacterial damage mechanisms were systematically studied in terms of cell structure and morphology, enzyme activity, malondialdehyde and intracellular reactive oxygen species levels. The inactivation of E. coli DH5α in complex water matrix (including coexisting of anions and natural organic matter) and real wastewater was inhibited. The abundance of intracellular ARGs decreased by 1.15 log, whereas extracellular ARGs increased by 0.32 log. This research supplied a prospective approach for inhibiting the dissemination of antibiotic resistance.
研究领域:
环境科学
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微生物学
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水处理
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公共卫生
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Zhenqi Du,Naiyuan Liu,Yiran Jia,Huaiyu Zhang,Shunke Ding,Baozhen Liu,Yonglei Wang,Wenhai Chu
Cellar water DOM presented LMW, low aromaticity and high nitrogen contents. • Toxicity of disinfected cellar water is nearly 2.5 times that of surface water. • UV/SPC-BAC reduced chlorinated cellar water toxicity by nearly 75%. • UV-SPC-BAC mitigates toxicity by lowering DOM unsaturation and unknown CHONCl. Cellar water harvested from rooftops is recognized as a valuable alternative source for alleviating global water scarcity. Nevertheless, accumulated multi-source pollutants pose a high risk of toxic disinfection by-product (DBP) formation during disinfection. In this study, a pilot-scale system was established to control DBP-associated toxic risks. Compared with local surface water, simulated rooftop-harvested cellar water contained elevated organic matter (3.18 ± 0.23 mg/L), with nitrogenous organics (CHONs, CHONSs) accounting for 49.94% of total organic molecules. Accordingly, chlorinated cellar water exhibited 2.85-fold higher cytotoxicity and 2.44-fold higher genotoxicity than chlorinated surface water. Conventional coagulation-sand filtration preferentially removed high-molecular-weight CHO fractions yet leaves abundant hydrophilic nitrogenous organics uneliminated. In contrast, the ultraviolet/sodium percarbonate-biological activated carbon (UV/SPC-BAC) process drastically reduced molecules from 6687 to 3113, with marked declines in CHONs and CHONSs. Separate UV/SPC oxidation or BAC filtration reduced DBP-related toxicity by only 20.2% - 30.6%, whereas the combined UV/SPC-BAC process achieved nearly 72.0% toxicity reduction. Significant declines also occurred in the calculated additive toxicity index of known DBPs and the abundance of unknown DBPs. Mass difference analysis revealed that UV/SPC-BAC preferentially eliminates unsaturated and nitrogenous fractions, suppressing oxygen addition during post-chlorination and mitigating nitrogenous DBP formation potential and toxicity. Download: Download high-res image (214KB) Download: Download full-size image
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2016
·Vol. 43
·期 5
·3219-3236
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IF 1.833
Farooq Usman,Danish Muhammad,Lu Shuguang,Naqvi Muhammmad,Gu Xiaogang,Fu Xiaro,Zhang Xiang,Nasir Muhammad
Graphene-oxide-supported nano zero-valent iron (nZVI) composite (nZVI–rGO) was synthesized and tested as an efficient percarbonate activator for degradation of 1,1,1-trichloroethane (TCA). Significant dispersion of nZVI on the surface of reduced graphene oxide (rGO) was observed, with good limitation of nanoparticle agglomeration and aggregation. Good TCA degradation efficiency of 90% was achieved in 2.5 h in presence of 0.8 g/l nZVI–rGO catalyst and 30 mM sodium percarbonate (SPC) oxidant; however, excessive catalyst or oxidant concentration reduced the degradation efficiency. Investigation of reactive oxygen species using radical probe compounds as well as radical scavengers confirmed presence of hydroxyl (OH · ) and superoxide ( \({\text{O}}_{2}^{\cdot - }\) ) radicals that are responsible for the TCA degradation. The morphology and surface characteristics of the heterogeneous catalyst were analyzed by transmission electron microscopy and scanning electron microscopy. Brunauer–Emmett–Teller analysis revealed that the synthesized catalyst had large surface area and small particle size of 299.12 m 2 /g and 20.10 nm, respectively, compared with 5.33 m 2 /g and 1.12 µm for bare graphene oxide. X-ray diffraction analysis revealed good dispersion of nZVI on the surface of rGO. Fourier-transform infrared characteristic peaks confirmed strong attachment of Fe onto the rGO surface. Energy-dispersive spectroscopy analysis validated the stoichiometric composition of the prepared Fe/rGO material. In conclusion, use of nZVI–rGO-activated SPC could represent an alternative technique for remediation of TCA-contaminated groundwater.
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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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Qian Guo,Zuxin Xu,Wenhai Chu,Yingying Zhou,Xiaoting Gao,Cheng Ye
Sewer overflows are a potential source of emerging contaminants to urban waters, posing a threat to ecosystems and human health. Herein, the performance and mechanism of ferrate(Ⅵ) (Fe(Ⅵ))/peroxymonosulfate (PMS), Fe(Ⅵ)/peroxydisulfate (PDS), and Fe(Ⅵ)/percarbonate (SPC) for the degradation of ofloxacin (OFL) in overflows were comparatively investigated. These systems achieved efficient degradation of OFL and the removal of conventional pollutants. Particularly, Fe(Ⅵ)/PMS showed better degradation performance for OFL with a degradation efficiency of 98.8 %. The dominant reactive oxygen species for OFL degradation in the Fe(Ⅵ)/PMS, Fe(Ⅵ)/PDS, Fe(Ⅵ)/SPC systems were singlet oxygen ( 1 O 2 ), sulfate radical (SO 4 · - ), and hydroxyl radical (·OH), respectively. High-valent iron species played an important role in the Fe(Ⅵ)/PMS and Fe(Ⅵ)/PDS systems. Notably, the synergistic effect of oxidation and in-situ coagulation played a key role in OFL degradation, which determined the superior performance of Fe(Ⅵ)/PMS. The formed flocs with Fe-O-P bond acted as a highway to promote the electron transfer from OFL to PMS, resulting in the efficient degradation of OFL in Fe(Ⅵ)/PMS system. Moreover, a same degradation pathway of OFL was found, and the toxicity of the degradation products was reduced, especially in the Fe(Ⅵ)/PMS system. This study provided a new strategy for overflows treatment.
研究领域:
环境科学
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化学工程
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水处理技术
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PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Yuzhi Liu,Chuang Wu,Wei Gao,Shuang Zhong,Wenbing Zhao,Shuai Xia,Haiyang Yu,Nan Shao,Yu Gao,Donglei Zou
Tailwater treatment from high-standard plastic-cleaning wastewater and red mud (RM) resource recycling pose major challenges. In this study, a heterogeneous microwave-responsive catalyst, RM/biochar (RM/BC), was successfully prepared to synergistically integrate magnetic and dielectric losses for activation of sodium percarbonate (SPC) to degrade the plastic additive diethyl phthalate (DEP). Characterization analyses revealed that under oxygen-limited conditions at 600 °C, poplar leaf powder was fully carbonized, while Fe 2 O 3 in RM was reduced to FeO and further transformed into Fe 3 O 4 , forming a composite dominated by amorphous carbon and Fe 3 O 4 . In RM/BC-600, Fe 3 O 4 and amorphous carbon collaboratively enabled dual hot-spot effects under microwave irradiation via magnetic and dielectric losses, accompanied by enriched oxygen vacancies. Hydroxyl radicals (•OH) were identified as the dominant reactive oxygen species (ROS) in SPC activation. Through single-factor and response surface optimization, under conditions of 40 μM DEP concentration, 4.03 mM SPC dosage, 6.24 g/L RM/BC-600 dosage, 87.2 °C reaction temperature, and 100 W microwave power, the optimal DEP removal efficiency reached 96.1 %. In-situ FTIR/Raman spectroscopy and EPR analysis demonstrated that RM/BC primarily facilitated SPC decomposition to hydrogen peroxide, with oxygen vacancies catalyzing hydrogen peroxide to generate •OH as the main ROS, supplemented by carbonate radicals (•CO 3 − ), superoxide radicals (•O 2 − ), and singlet oxygen ( 1 O 2 ), while dual hot-spot effects accelerated this process. HPLC-QTOF-MS identified 12 intermediate products, and plausible degradation pathways were proposed. ECOSAR software predicted reduced acute toxicity of degradation products, and seed germination assays confirmed minimal ecotoxicity of RM/BC to soil-plant systems. This study achieves RM resource recovery and hazard mitigation via a green strategy, enhancing plastic wastewater treatment through DEP detoxification and stability.
研究领域:
环境科学
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化学工程
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材料科学
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废弃物管理
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微波化学
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水处理技术
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DOI
PubMed
高影响因子
ELECTROPHORESIS
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2021
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IF 3.535
Hui Jiang,Hao Zhang,Shi-Jun Yin,Min Lu,Xu Wang,Feng-Qing Yang
Profiling of lipid–water partition coefficients ( K L/W ) of drugs is an essential issue during the early stage of drug development. In this study, two liposomes, including 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC) + cholesterol (Chol) (DSPC/Chol liposomes) and soybean lecithin (SPC) + Chol (SPC/Chol liposomes), were prepared for the liposome electrokinetic chromatography (LEKC) analysis, and the logarithm of lipid–water partition coefficients (log K L/W ) of neutral and ionic drugs were determined based on an iterative method. The log K L/W values determined by the SPC/Chol or DSPC/Chol liposomes LEKC were linearly fitted, which showed a good fitting coefficient ( R 2 = 0.89). Furthermore, the linear relationship between the data obtained from LEKC system and octanol–water system, immobilized artificial membrane, Caco-2 cell model, and software prediction was analyzed, respectively. Results illustrated that DSPC/Chol liposomes or SPC/Chol liposomes had a good linear relationship with Caco-2 cell model, and R 2 was 0.81 and 0.72, respectively. Moreover, the linear free energy relationship analysis suggested that the solute volume, hydrogen bond basicity, and J – were the main descriptors that drove the partition process of solutes in the SPC/Chol or DSPC/Chol LEKC system. In addition, the normalized properties of the SPC/Chol and DSPC/Chol LEKC systems through linear free energy relationship analysis were very close. In short, DSPC/Chol liposomes are more suitable for simulating cell membranes than SPC/Chol liposomes, and the developed LEKC is an effective partitioning model for measuring the log K L/W of drugs.
研究领域:
药学
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分析化学
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药物开发
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DOI
PubMed
高影响因子
TALANTA
·
2023
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IF 6.1
Zixuan Ding,Peilin Wang,Zhenrun Li,Yupeng Guo,Qiang Ma
The combination of highly sensitive electrochemiluminescence (ECL) techniques with localized surface plasmon resonance (LSPR) effect can achieve the highly sensitive and specific detection in the analytical and biosensing applications. However, how to effectively improve the electromagnetic field intensity is an unresolved issue. Herein, we have developed an ECL biosensor based on sulfur dots and [email protected] nanorod array architecture. Firstly, the high luminescent sulfur dots with ionic liquid capping (S dots (IL) have been prepared as the new ECL emitter. The ionic liquid greatly improved the conductivity of sulfur dots in the sensing process. Furthermore, [email protected] nanorods array structure was constructed on the electrode surface by the evaporation induced self-assembly. On the one hand, the LSPR of [email protected] nanorods was more significant than that of good nanomaterial due to the plasma hybridization and the competition between free electrons and oscillating electrons. On the other hand, nanorods array structure had strong electromagnetic field intensity as hot spots due to the surface plasmon coupling ECL effect (SPC-ECL) effect. Therefore, the Au @Ag nanorods array architecture not only greatly enhanced the ECL intensity of sulfur dots, but also changed the ECL signals into polarized emission. Finally, the constructed polarized ECL sensing system was used to detect the mutated BRAF DNA in the eluent of thyroid tumor tissue. The biosensor showed the linear range from 100 fM to 10 nM with a detection limit of 20 fM. The satisfactory results demonstrated that the developed sensing strategy had great potential in the clinical diagnosis of BRAF DNA mutation in thyroid cancer.
研究领域:
分析化学
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生物传感
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纳米技术
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癌症诊断
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生物医学工程
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DOI
PubMed
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2021
·
IF 3.935
Hui Jiang,Shi-Jun Yin,Xu Wang,Min Lu,Hao Zhang,Feng-Qing Yang
Two liposomes , including 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC) + 1,2-dimyristoyl- sn -glycero-3-phosphoethanolamine (PE) + cholesterol (Chol) (DSPC/PE/Chol liposomes) and soybean lecithin (SPC) + PE + Chol (SPC/PE/Chol liposomes), were prepared and fixed on the inner wall of capillary column by using the adhesion of polydopamine (PDA) membrane and the cross-linking property of glutaraldehyde (GA). The immobilized liposome capillary column (ILCC) has good repeatability and stability based on the electrophoretic mobility of analyte . A CE method based on the immobilized liposome capillary column chromatography (ILCCC) was successfully developed to study the retention behavior of drugs on ILCC, and the logarithm of retention factor (log k ) of neutral and ionic drugs were determined. The results show that the log k measured by the ILCCC based on two liposomes have a good linear fitting (R 2 = 0.86). Moreover, the linear relationship between ILCCC system and other related research systems (octanol-water system and immobilized artificial membrane (IAM)) was analyzed, and the results indicate that SPC/PE/Chol ILCCC, DSPC/PE/Chol ILCCC and IAM systems have good fitting results, R 2 values are 0.86 and 0.78, respectively. In addition, the normalization coefficients of ILCCC and IAM systems obtained by the linear free energy relationship (LFER) analysis are close and the d value is small. In short, the ILCCC is a simple and feasible method for studying drug membrane permeability.
研究领域:
分析化学
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药学
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生物技术
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Shiyu Zuo,Dongya Li,Haiming Xu,Dongsheng Xia
The Advanced Oxidation Processes (AOPs) still require further research in response to ever-increasing standard of reclaimed water reuse and operating environment requirements. In this study, an efficient microwave-ultraviolet catalyzed oxidation system (MW-UV) was successfully developed, and its degradation effect was studied by using activated H 2 O 2 , sodium percarbonate (SPC), persulfate (PS), and peroxymonosulfate (PMS) to degrade toxic organic contaminants in wastewater and actual industrial wastewater. It was shown that MW-UV had an exceptionally high capability to react with these four common peroxides to produce reactive radicals ( OH and SO 4 − ). This can destroy multiple toxic organic contaminants through nonselective oxidation with a wide range of pH applications, has strong adaptability to anions in bodies of water, and can effectively treat wastewater. The sequence of predominant free radical generation rate by MW-UV was SPC > H 2 O 2 > PS > PMS, with higher generation rate constant than other Fenton processes. The free radical evolution mechanisms for H 2 O 2 , SPC, PS, and PMS activation were also investigated. The thermal and non-thermal effects of microwave irradiation have a significant enhancement for UV reactions, and thus the synergy between the MW and UV can effectively activate peroxide. This treatment method could provide scientific basis and reference for degrading toxic organic contaminants in small-scale and limited space wastewater treatment.
研究领域:
环境工程
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化学工程
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水处理
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高影响因子
危险品化学品经营许可证（带存储）