COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
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2022
·
IF 4.52
Rui Zhang,Zhigang Zhao,Mingshuai Li,Liang Luo,Shihui Wang,Kun Guo,Wei Xu
Aquatic water with carbonate alkalinity presents a survival challenge to aquatic animals. As an economically important crab, large quantities of Eriocheir sinensis are cultured in carbonate-type saline-alkali ponds, while the toxic effect on E. sinensis from carbonate alkalinity is still unclear. In this study, untargeted liquid chromatography-mass spectrometry metabolomics was performed to investigate the metabolic change caused by culture alkalinity, and confirmed distinct physiological response under gradient alkalinities. There were 39 differential metabolites obtained in the low-alkalinity group (4.35 mmol/L) versus control group, and “arachidonic acid metabolism” was enriched as a core response pathway. 93 differential metabolites were identified in the high-alkalinity group (17.43 mmol/L) versus control group, and a complex response net was manifested through integrated analysis, building by “steroid hormone biosynthesis”, “phenylalanine, tyrosine and tryptophan biosynthesis”, “phosphonate and phosphinate metabolism”, “phenylalanine metabolism”, “mineral absorption”, “purine metabolism” and “carbon metabolism”. This indicated the mobilization of energy reserves and the suppression of protein and amino acid catabolism were manifested in E. sinensis gills to defense high alkalinity stress. In addition, the persistently regulation of key metabolites under various alkalinity, including diuretic compound “spironolactone” and the antiphlogistic compound “LXB 4 ”, suggested anti-inflammatory action and excretion regulation were initiated to defend the stress.
研究领域:
水产养殖学
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环境毒理学
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代谢组学
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PubMed
高影响因子
Journal of Water Process Engineering
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2020
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IF 3.465
Chang Tian,Yan-Xia Zhao
Polytitanium coagulants have been recently developed and have received wide attention due to both strong coagulation capability and sludge recycling to produce valuable by-products, titanium dioxide (TiO 2 ). This study reports the performance of coagulation with emerging polytitanium salts, polytitanium chloride (PTC) and polytitanium sulfate (PTS), for the treatment of two common cyanobacteria ( Microcystis aeruginosa , MA and Microcystis wesenbergii , MW)-laden surface water, which has been barely reported. Of particular concern is the coagulant dosage and solution pH dependence of polytitanium coagulation, which are the main parameters influencing coagulation efficiency. The influence of basicity (B) of PTC and PTS on coagulation performance was simultaneously included. Results show the optimized B value of 1.5 with coagulant dosage of 30 mg/L and initial solution pH between 7–9 for both PTC and PTS coagulation, wherein obvious advantage of PTC was observed over PTS regardless of MA- or MW-laden surface water treatment. The PTC coagulation could achieve almost complete removal of algae (about 99.0 %) with synergic removal of organic matter with high-efficiency. Both PTC and PTS were more capable at alkaline solution pH conditions for turbidity and algae removal through sweep flocculation, while satisfied removal of the humic acid-representative organic matters was observed at acidic to neutral pH conditions by charge neutralization. Satisfied flocculation zones were determined according to synergic removal of algae, turbidity and organic matters, with most of the satisfied points distributed at solution pH 7–9 conditions. This study will provide theoretical basis and facilitate wide application of the polytitanium coagulation for algae-loaded surface water treatment.
研究领域:
环境工程
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水处理
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胶体与界面化学
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环境化学
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给排水科学与工程
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2022
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IF 8.91
Hua Long,Xinyu Huang,Meijia Liu,Changhao Cui,Li Li,Yang Liao,Dahai Yan
The improper disposal of large amounts of solid waste (SW) has led to serious ecological and environmental problems, especially heavy metal (HM) pollution. Converter steelmaking has the potential to co-process SW, but the distribution of heavy metals (HMs) during converter steelmaking is unclear. In this study, the effects of smelting temperature and slag alkalinity on the distribution of typical HMs in the SW of steel samples, steel slag , and the gas phase were investigated in a specially-made induction furnace. The results showed that upon increasing the smelting temperature, As (As 2 S 3 ) was mainly distributed in the steel sample, and the HM-containing compounds Cr 2 O 3 , CrCl 3 , ZnCl 2 , ZnS, ZnO, PbCl 2 , PbS, and PbO were mainly distributed in the gas phase. Upon increasing the alkalinity within a certain range, the distribution of HMs in steel samples and steel slag increased gradually, while their distribution in the gas phase decreased. Thermodynamic calculations , Eh-pH diagrams, XRD patterns, and XPS spectra indicated that impurity elements in the hot metal and the CaO content affected the chemical reactions by which HM-containing compounds in the steel sample formed elemental HMs and those in steel slag existed as oxides; therefore, it is necessary to choose a suitable temperature and alkalinity for slag when disposing of different types of SW.
研究领域:
环境科学
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冶金工程
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 27
·9398-9405
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IF 4
Yuliang Guo,Peilun Li,Zhengchang Wei,Guangjun Wu,Landong Li
Efficient synthesis of zeolites with different topologies is of great significance for both fundamental research and industrial application. Herein, the SSZ-23 zeolite, an odd zeolite containing 7-membered ring (7-MR) and 9-MR channels, has been synthesized under fluorine-free conditions via the route of pre-aging and pH regulation. By this novel synthesis route, the crystallization time can be significantly shortened to 3 days, nearly half as that by the conventional route in fluoride media. The pH value of the aging gel, i.e., the basicity, is found to play a key role in the synthesis, as SSZ-13 and SSZ-25 zeolites can be synthesized simply by changing the basicity of the same aging gel. Characterization results indicate that decreasing the basicity can promote the condensation between Si and Si/Al species and thus increase the framework density of the resulting zeolites. Finally, the dimethyl ether (DME) carbonylation reaction is employed to evaluate the catalytic properties of the above three zeolites with an identical chemical composition, and to reveal the unique confinement effect in various zeolite topologies.
研究领域:
材料科学
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催化化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Xiaoman Li,Pengfei Zhai,Xinyu Liu,Guangqiang Liu,Rongfei Wei,Hai Guo
A series of novel Sn 2+ doped boroaluminate glasses were prepared by the traditional melt quenching method in this work. Their glass network structure, luminescent properties, and mechanisms were studied in detail. The main framework of the glass network was dependent on the glass network former (B 2 O 3 ) and intermediate (Al 2 O 3 ), and was characterized by the 11 B and 27 Al NMR spectra . Broadband tunable blue-violet emissions ranging from 320 to 550 nm were realized by regulating the glass network structure through optical basicity. The quantitative relationship between optical basicity and emission/excitation peak positions and intensities, FWHM, and Stokes-Shift of this Sn 2+ -doped glass were revealed, according to which the luminescent properties of Sn 2+ could be modulated and even predicted in the future. This work will enrich our understanding of the luminescent properties of Sn 2+ ions and the variations of glass network structure, guiding the design of efficient and tunable luminescent boroaluminate glass.
研究领域:
材料科学
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光学
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DOI
高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
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2024
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IF 2.4
Chen Mao,Dong Xiaosen,Pu Shuiqiang,Tang Wenbo,Zheng Kui
Na 2 O and K 2 O alkaline oxide capacities of TiO 2 -bearing blast furnace slags are critical values for vanadium titanomagnetite blast furnace operation. In this study, high-temperature experiments with fast-quenching were conducted to investigate the effects of TiO 2 concentration, basicity, MgO and Al 2 O 3 concentrations on Na 2 O and K 2 O concentrations in the TiO 2 -bearing blast furnace slags. The results were correlated with optical basicity and also compared with the plant data from one commercial vanadium titanomagnetite blast furnace.
研究领域:
冶金工程
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材料科学
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DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
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2022
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IF 6.267
Shushi Zhang,Zhenyang Wang,Peng Hu,Jiating Rao,Jianliang Zhang,Jing Pang
The HIsmelt process is well suited for smelting vanadium-titanium magnetite and has significant potential. In this paper, the vanadium and titanium distribution behavior at 1450 °C in the basicity range of 0.3–1.2 during HIsmelt smelting vanadium titano-magnetite was investigated experimentally for the first time. According to thermodynamic calculations combined with experimental validation, lower C content increases the activity coefficients of vanadium and titanium in the metal. Higher basicity decreases the activity coefficients of TiO 2 and SiO 2 in the slag, improves the distribution ratio of vanadium and titanium. Increasing C content and reducing basicity could increase the content of vanadium in the metal and TiO 2 in the slag, which is favorable to vanadium extraction and titanium recovery. Furthermore, the V and Ti content in the hot metal increased significantly with rising smelting temperature. Higher smelting temperatures promote vanadium distribution into hot metal but not titanium distribution into slag. Finally, The Si and Ti distribution ratios have a positive connection according to the fitted models.
研究领域:
冶金学
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材料科学
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化学工程
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DOI
高影响因子
Journal of Water Process Engineering
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2025
·
IF 6.7
Linjun Wu,Huan Li,Yuexi Zhou,Zhiqiang Shen,Jiane Zuo
This research evaluated the efficacy of self-sustaining alkalinity driven gas permeable membrane (SSAD-GPM) in ammonia recovery under low-rate aeration. This research initially confirmed the role of HCO 3 − and CO 3 2− in enhancing alkalinity release and ammonia conversion. It was determined that providing alkalinity through HCO 3 − necessitates the consumption of inorganic carbon (IC), and highlighting the criticality of maintaining a HCO 3 − /NH 4 + ratio exceeding 1.0 to optimize ammonia removal efficiency (>90.5 %). Alkalinity via CO 3 2− involves a two-stage hydrolysis process, consuming IC only in the second phase. Then, comparing SSAD-GPM with alkalinity addition driven GPM (AAD-GPM) for real anaerobic digestate treatment, SSAD-GPM demonstrated an initial ammonia removal efficiency of 99.1 %, which reduced to 82.8 % after 40 days of operation. In contrast, the efficiency of AAD-GPM decreased to 62.6 %. Superior anti-fouling performance of SSAD-GPM, due to aeration-induced turbulence, mitigated concentration polarization and fouling. Efficiency was restored to 98.1 % post-cleaning with tap water. Lastly, this research assessed the alkalinity consumption and cost of various ammonia removal/recovery strategies, demonstrating that SSAD-GPM can substantially lower operating costs, yielding a net profit of $0.081/kg N. These findings underscore the potential of SSAD-GPM as a cost-effective approach for treating high ammonia‑nitrogen wastewater with sufficient self-sustaining alkalinity (HCO 3 − /NH 4 + > 1.0).
研究领域:
环境科学
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污水处理
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DOI
高影响因子
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY
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2025
·
IF 4.3
Lin Han,Wenzhi Liu,Fangying Yuan,Qianwen Liu,Hongyu Cheng,Xiaofeng Jin,Yanchun Sun
The ecological conditions of freshwater aquaculture are deteriorating by degrees in recent years. Consequently, the comprehensive utilization of saline-alkaline water has garnered increasing societal attention. Here, crucian carp ( Carassius auratus ) were exposed to 20, 40 mmol/L NaHCO 3 for 30 days (T, F group). Metabolomic analyses were conducted using UPLC-QTOF/MS, complemented by biochemical and microbiology profiling to elucidate the damage of the saline environment to the intestinal microbial structure, which in turn interfered with the energy metabolism. It was observed that carbonate alkalinity (CA) exposure not only caused intestine oxidative stress but also changed the levels of several digestive enzymes, including α-amylase (AMS), chymotrypsin (CHY), lipase (LPS). Metabolomic analysis identified 22 different metabolites (DEMs) in T group and 77 DEMs in F group. MetaboAnalyst analysis indicated that these metabolites are primarily involved in energy-related pathways, including the citric acid cycle, galactose metabolism, and glycine, serine, and threonine metabolism. Intestinal microbial diversity and community composition were altered under carbonate alkalinity exposure, with increase in Proteobacteria abundance and decline in Firmicutes, abundance alongside enrichment of Sphingomonas . Herein, saline-alkaline stress disrupted the physiological homeostasis of the crucian carp intestine, leading to microbial dysbiosis and energy metabolic imbalance. This study provides a theoretical foundation for understanding the stress response of the crucian carp intestine and the role of the intestinal microbiome in host resilience under adverse environmental conditions.
研究领域:
水产养殖学
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环境生物学
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分子生物学
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DOI
PubMed
高影响因子
Journal of Physical Chemistry C
·
2024
·
IF 3.3
Jiaojiao Yu,Yi Zuo,Gudan Li,Hong Yang,Xinwen Guo
To synthesize a high-performance titanium silicalite-1 (TS-1), this paper reports a simple and environmentally friendly approach to regulate the alkalinity in the synthesis of titanium silicalite-1 (TS-1) involving tetrapropylammonium hydroxide (TPAOH) and tetrapropylammonium bromide (TPABr). Essentially, the pH of the synthesis gel was controlled by n(TPAOH/TPA+), while keeping the total tetrapropylammonium cations (TPA+) constant. The study shows that at a relatively moderate alkalinity of pH = 10.7, TS-1 produced exhibits nanocrystalline microstructure favorable for diffusion, contains high contents of TiO4 and TiV, and delivers 94.3% of H2O2 conversion with a turnover frequency of 565.6 mol (mol h)−1 in propylene epoxidation. Through detailed analysis of crystallization processes of TS-1 at different alkalinities, this study unveils the effect of alkalinity on the rate of Si–Ti condensation, which dictates the formation of the framework structure and incorporation of Ti species into the framework. Essentially, only at moderate alkalinity of pH = 10.7, comparable Si–OH and Ti–OH condensation rates permit the highest amount of Ti being inserted in TS-1 as active (TiO4 + TiV) and limits the self-condensation of Ti species to form inactive anatase-TiO2.
研究领域:
材料科学
·
催化化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Chenguang Li,Chenbiao Lai,Yaoyan Wu,Hanxiang Ouyang,Junbin Sun,Weihong Lu
Alumina based rare earth oxides ceramic materials, with the good performance against the CMAS corrosion, were widely used as the thermal/environmental barrier coatings. In this work, three Y 2 O 3 –Al 2 O 3 binary ceramic bulks, which were the Y 3 Al 5 O 12 , YAlO 3 and Y 4 Al 2 O 9 , were prepared by high temperature solid state reaction using the Y 2 O 3 and Al 2 O 3 as the raw materials. The resistances to CMAS corrosion of these materials at 1250 °C and 1350 °C were compared fully. The compositions and structures of the samples before and after corrosion were analysed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Results showed that the different chemical compositions of the materials resulted in the different optical basicity (OB) values which can decide the reactivity of the material with the CMAS melts. The Y 3 Al 5 O 12 ceramic material was inert to the CMAS for its low OB value of 0.75 and damaged seriously by the CMAS through physical penetration. The YAlO 3 and Y 4 Al 2 O 9 with the high OB values of 0.80 and 0.87 reacted with the CMAS to form the Ca 4 Y 6 (SiO 4 ) 6 O. The YAlO 3 ceramic bulk exhibited the good performance against the CMAS corrosion benefitting from the formation of the Ca 4 Y 6 (SiO 4 ) 6 O and the CaAl 2 Si 2 O 8 .
研究领域:
材料科学
·
化学
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DOI
高影响因子
Membranes
·
2025
·Vol. 15
·期 10
·297
·
IF 3.6
Qiaoying Wang,Bingbing Zhang,Jicheng Sun,Wenjia Zheng,Jie Zhang,Zhichao Wu
Although adding iron salts can improve phosphorus removal in membrane bioreactor (MBR) processes, overdosing iron salts may result in excessive iron concentrations in the effluent and pose risks of surface water contamination. In this study, an optimized iron salt dosing method was proposed to comprehensively investigate its effects on the performance of MBRs and the control of iron leakage. The results showed that batch dosing of solid iron salts (Fe2(SO4)3) into the influent or activated sludge maintained an effluent Fe3+concentration below 1.0 mg/L and a total phosphorus (TP) concentration below 0.30 mg/L. Long-term operation of the MBR (under conditions of HRT = 4.3 h, SRT = 20 d, and MLSS = 12 g/L) showed that batch dosing of solid iron salts led to an increase in the effluent ammonia–nitrogen (NH3-N) concentration, and the nitrification effect was restored after supplementing the alkalinity. Iron salts increased the TP removal rate by approximately 40% while inhibiting the biological phosphorus removal capacity. The average Fe3+concentration in the membrane effluent (0.23 ± 0.11 mg/L) met China’s Environmental Quality Standard for Surface Water (GB3838-2002). This study demonstrates that batch dosing of solid iron salts effectively controls iron concentration in the MBR effluent while preventing secondary pollution. The mechanisms of the impact of iron salts on MBR performance provide crucial theoretical and technical support for MBR process optimization.
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PubMed
高影响因子
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