Environmental Chemistry Letters
·
2022
·Vol. 20
·期 4
·2243-2251
·
IF 13.615
Zhu Guocheng,Chen Junming,Zhang Shanshan,Zhao Zilong,Luo Huihao,Hursthouse Andrew S.,Wan Peng,Fan Gongduan
Black-odorous waters are an increasingly common phenomenon characterized by excessive levels of nutrients, the formation of metal sufide precipitates, volatile sulfurous compounds, low dissolved oxygen and high chemical oxygen demand. Black-odorous waters frequently occur in lake and river systems where inputs have restricted circulation. The key remediation issue is the removal of nitrogen and phosphorus. Here, we present a novel aeration-adsorption system using fiber balls and we study treatment parameters and removal mechanism. Kinetics and changes of the solid phase were followed using Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. Results show complete removal of ammonia N, initially at 31 mg/L, and 92.8% removal of total nitrogen, initially at 29 mg/L, after a 24 h reaction time at pH 9.67. At pH 5.67 and 9.67, total phosphorus and phosphate could be significantly reduced by 90–92% at 3.2–5.2 mg/L after 24 h. Treatment met China’s integrated wastewater discharge standards, demonstrating an effective and robust treatment capability. First-order and second-order kinetic models provided a good fit to the treatment data, indicating physical and chemical adsorption were involved in the treatment reactions. The reaction mechanism involved hydrogen substitution and binding to oxygen. These results present a cost effective and robust approach for the removal of N and P from black, odorous water, providing opportunity to abate environmental contamination.
研究领域:
环境工程
·
水污染治理
·
生态修复
·
环境化学
✓ 已验证
DOI
高影响因子
Nano Research
·
2024
·Vol. 17
·期 7
·5786-5794
·
IF 9.5
Yang Chaoxin,Cai Zhengwei,Liang Jie,Dong Kai,Li Zixiao,Sun Hang,Sun Shengjun,Zheng Dongdong,Zhang Hui,Luo Yongsong,Yao Yongchao,Wang Yan,Ren Yuchun,Liu Qian,Li Luming,Chu Wei,Sun Xuping,Tang Bo
Seawater electrolysis, especially in coastlines, is widely considered as a sustainable way of making clean and high-purity H 2 from renewable energy; however, the practical viability is challenged severely by the limited anode durability resulting from side reactions of chlorine species. Herein, we report an effective Cl − blocking barrier of NiFe-layer double hydroxide (NiFe-LDH) to harmful chlorine chemistry during alkaline seawater oxidation (ASO), a pre-formed surface-derived NiFe-phosphate (Pi) outer-layer. Specifically, the PO 4 3− -enriched outer-layer is capable of physically and electrostatically inhibiting Cl − adsorption, which protects active Ni 3+ sites during ASO. The NiFe-LDH with the NiFe-Pi outer-layer (NiFe-LDH@NiFe-Pi) exhibits higher current densities ( j ) and lower overpotentials to afford 1 A·cm −2 ( η 1000 of 370 mV versus η 1000 of 420 mV) than the NiFe-LDH in 1 M KOH + seawater. Notably, the NiFe-LDH@NiFe-Pi also demonstrates longer-term electrochemical durability than NiFe-LDH, attaining 100-h duration at the j of 1 A·cm −2 . Additionally, the importance of surface-derived PO 4 3− -enriched outer-layer in protecting the active centers, γ-NiOOH, is explained by ex situ characterizations and in situ electrochemical spectroscopic studies.
研究领域:
能量转换
·
材料科学
·
电化学
·
可持续能源
·
水分解
·
表面工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN OIL CHEMISTS SOCIETY
·
2014
·Vol. 91
·期 10
·1783-1792
·
IF 1.62
Han Lijuan,Li Lin,Li Bing,Zhao Lei,Liu Guo-qin,Liu Xinqi,Wang Xuede
High linoleic acid sunflower oil ( HLSO ) with various sitosterol ( Sit ) to lecithin ( Lec ) mass ratios (i.e., 0:100–100:0) were used to develop organogels at two storage temperatures ( T
s : 5 and 25 °C). The results showed that, at 25 °C, the hardness value of organogels obtained from HLSO with both Sit and Lec was higher than that of organogels developed from HLSO with only Sit or Lec . Microscopy revealed that the shapes of the crystals in the organogels varied significantly with the composition of the structurant and the T
s . At both T
s used, the Sit:Lec (80:20) system had a lower degree of supersaturation compared with the (100:0) system. X-ray diffraction (XRD) revealed that Sit:Lec mass ratio of 70:30, 80:20 and 100:0 had similar short spacings, and the presence of Lec might be adverse to the formation of Sit crystal in oil. Small-angel X-ray scattering (SAXS) showed that the layer thickness of Sit/Lec/HLSO organogel was larger than that of Sit/HLSO organogel. It was found that the presence of Lec induced the change of self-assembly structure of Sit in HLSO and caused the changes of physical properties of organogels obtained.
研究领域:
食品科学
·
材料科学
·
生物医学工程
·
脂质化学
·
软物质物理
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 22
·期 22
·3824-3830
·
IF 3.117
Ying Yu,Jiadong Yao,Xinyue Niu,Boran Xing,Yali Liu,Xiaoxiang Wu,Mengge Li,Xiaoyuan Yan,Jian Sha,Yewu Wang
As a promising layered material for electronic, optical and thermoelectric applications, black phosphorus nanoribbons have attracted much attention. Herein, single crystal black phosphorus nanoribbons have been successfully grown by chemical vapor transport. The microstructure characterization results clearly reveal that the zigzag direction is the preferential growth direction of the nanoribbons. The performance of FETs shows the good electrical properties of black phosphorus. Our research provides an economical method for growing high quality BPNRs, offering more possibilities for experimental research and their applications.
研究领域:
材料科学
·
凝聚态物理
·
纳米电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2024
·Vol. 142
·期 10
·e56569
·
IF 2.7
Jianmin He,Hao Liu,Bingtao Bao,Hanzhong Ren,Weixiang Xu,Qiuyan Luo,Yiting Xu,Jie Li,Birong Zeng,Conghui Yuan,Guorong Chen,Lizong Dai
The marine environment with high humidity and salinity poses higher requests on the service life of traditional polymer coatings therefore, various fillers have been developed for modification. Smart coatings built by fillers that possesses passive barrier and active self-healing properties show considerable prospects in metal protection. Herein, we applied a novel dual-loading strategy to design tannic acid (TA) decorating hydroxyapatite (HAp)/zeolite imidazole framework (ZIF-8) loading 2-amino benzothiazole (2-ABT) composite fillers. The epoxy coating (EP) doped with ABT@ZIF8-HAp@TA (AZHT/EP) presented hydrophobicity and improved mechanical performance on Q215 steel. Moreover, the |Z| f=0.01Hz of AZHT/EP after immersion in saline water for 28 days (6.24 × 10 10 Ω•cm 2 ) is higher than pure EPs with two magnitudes. The anticorrosion mechanism of the AZHT/EP was proposed based on the analysis of corrosion products. To conclude, the dual-loading strategy has considerable potential in designing smart coatings for corrosion protection in harsh environments.
研究领域:
材料科学
·
表面工程
·
腐蚀防护
·
纳米复合材料
✓ 已验证
DOI
高影响因子
WATER SCIENCE AND TECHNOLOGY
·
2022
·Vol. 86
·期 5
·1017-1033
·
IF 2.43
Fu Chengbin,Li Ye,Zuo Yangyang,Li Bolin,Liu Chang,Liu Dongxue,Fu Yan,Yin Yixin
It is essential to solve the problem of phosphorus pollution in urban landscape water and reduce the degree of eutrophication. In this paper, lanthanum-modified bentonite (La-B) was prepared by high-temperature calcination and liquid-phase precipitation. Then La-B was modified with chitosan to prepare a low-cost environment-friendly functional material: lanthanum/chitosan co-modified bentonite (La-BC). It can reach the adsorption equilibrium within 30 min, and the maximum adsorption capacity is 15.5 mg/g (initial phosphate concentration 50 mg/L); when the target concentration is 2 mg/L, the removal rate can reach 98.5%. La-BC has a stronger anti-interference ability to common coexisting anions SO 4 2− , HCO 3 − , NO 3 − and Cl − in the urban landscape water body. La-BC has excellent performance in weakly acidic to neutral water, and its pH applicable range has been improved, making it possible to apply in practical water. The fitting results show that the adsorption behavior conforms to the pseudo-second-order kinetic model and the Freundlich model. After 5 regenerations, the removal efficiency remained around 80%. In the actual water test results, the phosphate concentration can be controlled below 0.1 mg/L and the removal rate is above 75%. Due to its low cost and reusability, it has great potential in the practical application of phosphate removal from landscape water. La-BC high-efficiency phosphorus removal agent was prepared by high temperature calcination and liquid phase precipitation. La-BC has shown excellent competitiveness in actual landscape water application and regeneration experiments. A possible mechanism of La-BC adsorption of phosphate has been studied and analyzed.
研究领域:
环境科学
·
材料科学
·
水污染控制
✓ 已验证
DOI
高影响因子
Russian Journal of Physical Chemistry A
·
2025
·Vol. 99
·期 7
·1487-1493
·
IF 0.8
Lv Hao,Wen-hao Mai,Ya-yuan Zheng,Huai-ming Du,Bo Xing
Ammonium dihydrogen phosphate (MAP) is a highly efficient compound fertilizer and industrial raw material, yet commercial industrial-grade MAP often contains a substantial amount of impurities and presents issues with particle size distribution and shape. These factors make it unsuitable for use as battery-grade MAP, necessitating the study of MAP’s crystallization in H 2 O–Ethylene Glycol (EG) binary systems to identify potential solutions. This paper explores the thermodynamic process of MAP crystallization in these systems. It reports the results of a comprehensive study on the effects of H 2 O–EG binary system proportions on MAP’s thermodynamics. This research employs a range of established models, including the Apelblat model, Van’t Hoff model, and Redlich–Kister model, to correlate the experimental data and determine the thermodynamic parameters associated with MAP’s crystallization process. Furthermore, the Mersmann equation and Barata equation are utilized to calculate the solid-liquid surface tension (γ) and the crystal surface entropy factor ( f ) of MAP in the systems. The thermodynamic experimental results of this paper provide a preliminary research foundation for the crystallization kinetics of MAP. The findings indicate that the dissolution of MAP is an endothermic and non-spontaneous process, primarily driven by enthalpy changes. The Apelblat model appears to offer a superior description of MAP’s solubility. The findings of this study are of significant importance to designers engaged in the industrial crystallization process of MAP. They provide valuable information for the optimization and improvement of the production process of MAP, thereby enhancing its quality and efficiency.
研究领域:
化学工程
·
材料科学
·
热力学
✓ 已验证
DOI
高影响因子
Journal of Food Measurement and Characterization
·
2024
·Vol. 18
·期 5
·3344-3352
·
IF 2.9
Cao Mengrui,Xu Yiwei,Jia Xupeng,He Baoshan,Ren Wenjie,Wei Min,Suo Zhiguang,Jin Huali,Zhao Wenhong
A simple and sensitive colorimetric method for organophosphorus pesticides (Ops) detection was proposed via a multi-enzyme cascade reaction. The coordination compound of wool keratin and Cu (WK-Cu) was synthesized by self-assembly and used as a key catalyst in the cascade reaction. The enzymatic kinetics curve was established to explore the catalytic property, and the obtained K m and V max proved that WK-Cu has a good peroxidase-like activity. Ops could inhibit acetylcholinesterase activity and trigger the multienzyme cascades process, resulting in an amplified response signal. The key conditions were optimized, such as enzyme-linked reaction time and the concentration of each reactant in Ops detection. The detection range of phoxim was 10-1000 µg/L with a detection limit of 2.31 µg/L. Compared with other colorimetric detections, the proposed method exhibited a wider detection range and a relatively lower detection limit. In addition, this colorimetric method showed good universality and anti-interference ability for the analysis of phoxim in apple, cabbage and cauliflower samples. Owing to these merits, the proposed method has a good application prospect in Ops detection.
研究领域:
分析化学
·
环境科学
·
生物化学
·
酶学
·
材料科学
✓ 已验证
DOI
高影响因子
JACS Au
·
2023
·
IF 8
Liangwei Ma,Yiwei Liu,He Tian,Xiang Ma
The design and regulation of phosphors are attractive but challenging because of the spin-forbidden intersystem crossing (ISC) process. Here, a new perspective on the enhancement of the ISC is proposed and demonstrated. Different from current strategies, the ISC yield (ΦISC) is enhanced by decreasing the fluorescence radiative transition rate constant (kF) via rational molecular designing rather than boosting the spin–orbit coupling by decorating the molecular skeleton with a heavy atom, heteroatom, or carbonyl. The kF of the designed molecule in this case is associated with the substituent position of the methoxy group, which alters the distribution of the front orbitals. The S0 → S1 transition of these compounds evolves from a bright state to a dark state gradually with the variation of the substituent position, accompanied by the decrease of kF and increase of ΦISC. The fluorescence emission is switched to phosphorescence emission successfully by regulating the kF. This work provides an alternative strategy to design efficient room-temperature phosphorescence material.
研究领域:
材料科学
·
有机光电子学
·
光化学
·
分子设计
·
理论化学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Xintian Sui,Guining Lu,Hongyu Lin,Xingchun Duan,Yingying Xie,Wensi Pan,Xiaoyun Yi,Zhi Dang
This study investigated the removal of NO 3 – and PO 4 3– from eutrophic water by a new sorbent of modified corn straw which is low-cost and environmentally safe. The sorbent was characterized using element analyzer, spectrum and scanning electron microscopy, 13 C nuclear magnetic resonance and Fourier transform infrared. Results suggest that the quaternary amino group and hydroxyl group are the main functional groups on the fibrous surface of the sorbent. The effects of contact time, initial concentration and pH on the removal of NO 3 – and PO 4 3– , as well as adsorption isotherms at different temperature were investigated. Results showed that the adsorption of NO 3 – and PO 4 3– by this sorbent can reach equilibrium within 10 min, which was highly efficient. The adsorption process could fit well with the pseudo-second-order reaction kinetic rate equation and the adsorption rate is positively correlated to the square of the adsorption process driving force. The equilibrium data fitted well with Langmuir adsorption model and the maximum NO 3 – and PO 4 3– adsorption capacities at neutral pH were 19.9 and 0.164 mg/g at 30°C, respectively. A stability test was operated for three cycles. Results demonstrate that the adsorption capacity of this sorbent only loses 14.0%, indicating that the sorbent has good potential for reuse and recycle.
研究领域:
环境科学
·
水污染控制
·
环境功能材料
·
农业废弃物利用
·
吸附技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry B
·
2019
·Vol. 7
·期 36
·5502-5509
·
IF 5.047
Yifang Gao,Yuan Jiao,Huilin Zhang,Wenjing Lu,Yang Liu,Hui Han,Xiaojuan Gong,Lei Li,Shaomin Shuang,Chuan Dong
Herein, an easy and effective ratiometric fluorescent nanoprobe for the selective detection of Pb2+ and pyrophosphate (PPi) was developed based on label-free carbon dots (CDs). The CDs showed dual emission bands at 477 and 651 nm under a single-wavelength excitation (391 nm). Pb2+ and PPi were sequentially detected by the sensor with high reliability and accuracy via the exploitation of the fluorescence intensity ratio (F477/F651). The dual emission sensor exhibited high selectivity and excellent sensitivity for Pb2+ and PPi than for other analytes with detection limits as low as 0.055 μM and 0.089 μM, respectively. Moreover, the fluorescent CDs changed from pink to cyan and from cyan to pink and could be used as a fluorescent paper sensor for the visual detection of Pb2+ and PPi. To the best of our knowledge, this is the first report on the ratiometric fluorescence detection of Pb2+ and PPi by CDs; therefore, the as-synthesized CDs show great potential for application in the determination of Pb2+ and PPi in real samples.
研究领域:
分析化学
·
生物传感
·
环境监测
·
材料科学
·
荧光探针
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2016
·Vol. 18
·期 39
·7537-7543
·
IF 3.849
Lingna Sun,Qingwei Deng,Bo Fang,Yongliang Li,Libo Deng,Bo Yang,Xiangzhong Ren,Peixin Zhang
A LiFePO4/C composite was directly synthesized via a simple solvothermal method. Ferric nitrate nonahydrate, Fe(NO3)3·9H2O, was selected as a low cost iron source in the ethanol process and glucose as the carbon source. Through SEM images, it was found that the concentration of the glucose solution has an important influence on the morphology of particles. The samples were characterized by Raman spectroscopy and TEM measurements, showing the formation of graphitic carbon, which is desirable for its contribution to the electronic conductivity. XPS analysis verified that Fe3+ was almost completely reduced to Fe2+. CV (cyclic voltammetry), EIS (electrochemical impendence spectroscopy), and galvanostatic charge/discharge tests were conducted to further study the electrochemical properties of the LiFePO4/C composite. The results reveal that the LiFePO4/C composite with a rodlike shape has the highest specific capacity of 147 mA h g−1 at 0.1C, and the capacity retention remains 100% after 50 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米结构材料
·
复合材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）