ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY
·
2015
·
IF 2.084
Ting Wang,Xiaoxian Zhang,Dayong Tian,Ya Gao,Zhifen Lin,Ying Liu,Lingyun Kong
CO 2 , as the typical greenhouse gas causing the greenhouse effect, is a major global environmental problem and has attracted increasing attention from governments. Using algae to eliminate CO 2 , which has been proposed as an effective way to reduce the greenhouse effect in the past decades, can be disturbed by a growing number of artificial chemicals. Thus, seven types of chemicals and Selenastrum capricornutum (algae) were examined in this study, and the good consistency between the toxicity of artificial chemicals to algae and the disturbance of carbon fixation by the chemicals was revealed. This consistency showed that the disturbance of an increasing number of artificial chemicals to the carbon fixation of algae might be a “malware” worsening the global greenhouse effect. Therefore, this study proposes an original, promising index to assess the risk of deepening the greenhouse effect by artificial chemicals before they are produced and marketed.
研究领域:
环境科学
·
生物学
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yun Wang,Sheng Xu,Haiyuan Zhang,Yuyin Wang,Enmao Wang,Zeyu He,Jiahua Zhu,Xiaohua Lu,Lilong Zhang,Yang Bai,Kunfeng Zhao,Qingwei Gao,Jianrong Zeng,Zhiguo Yi,Tingzhen Ming,Wei Li,Liwen Mu
Methane is a potent greenhouse gas, contributing 30 % of global warming. Herein, we report a low cost but efficient CuO x /ZnO nanocomposite photocatalyst for total oxidation of methane into carbon dioxide under ambient conditions. The results show that the addition of a small amount (0.05 wt%) of CuO x enhances the methane photo-oxidation activity of ZnO by about 7-fold. More importantly, the CuO x /ZnO demonstrates good durability evidenced by steady performance after multiple cycles or after long-term storage. The promising performance of CuO x /ZnO is attributed to two facts, i) highly dispersed CuO x on the ZnO surface (indicated by N 2 O selective oxidation experiments and X-ray absorption fine structure (XAFS)); ii) enhanced methane adsorption and carbon dioxide desorption on CuO x /ZnO surface. The photocatalytic reaction mechanism of methane on CuO x /ZnO was also investigated by in situ Fourier transform infrared spectroscopy (FTIR) and density functional theory (DFT) calculations. The results show that the highly dispersed Cu atoms on the ZnO surface favor the continuous oxidation of *OCH 3 . The potential value of our work lies in its capacity to mitigate or even eliminate the greenhouse effect.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
EUROPEAN JOURNAL OF SOIL SCIENCE
·
2024
·Vol. 75
·期 5
·e13572
·
IF 4
Shujuan Zhang,Xinlong Chen,Yuexiao Dong,Jingfan Qi,Zhaoyang You
Whether farmers should consider the role of arbuscular mycorrhizal fungi (AMF) in agriculture is a hotly debated topic. We aimed to investigate the role of indigenous AMF in reducing nitrogen (N) loss from paddy fields via runoff, leaching, NH 3 volatilization, and N 2 O emission. We conducted a pot experiment employing a mycorrhiza-defective rice mutant (non-mycorrhizal) as the control, grown in soil containing indigenous AMF. The corresponding AMF treatment used the progenitor of this mutant with the same soil. The plants were fertilized with nitrogen, phosphorus and potassium 6 weeks after sowing. The root colonization was 23% in mycorrhizal rice, and no typical AMF structures were observed in the roots of non-mycorrhizal rice. Our findings indicated that the mycorrhizal system exhibited lower N concentrations of runoff and leachate further compounded by reduced fluxes of N 2 O and NH 3 . This led to 14% decrease (mycorrhizal rice 111 kg N ha −1 ; the non-mycorrhizal rice: 129 kg N ha −1 ) in cumulative N loss within 3 days post-fertilization. While this AMF effect was consistent across the four tested N loss pathways, differences were observed between NH 4 + -N and NO 3 − -N in the runoff pathway. Notably, our results revealed no evidence of trade-offs in AMF effect on N loss among the tested pathways. Additionally, mycorrhizal rice had larger shoots and roots than their non-mycorrhizal counterparts. Our study underscores the potential benefits of indigenous AMF in paddy fields for mitigating water pollution and reducing greenhouse gas emission.
研究领域:
农业生态学
·
微生物学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Dandan Ma,Zhonghan Cheng,Ye Yuan,Somboon Chaemchuen
The zeolitic-imidazole frameworks (ZIFs) have become popular due to their uniformly structured cavities and portals of framework dimensions, which make them suitable for numerous applications. In order to access pores and functional surfaces, thermal activation is significantly post-treatment on the synthesis of ZIFs for their applications. This study explores the impact of different thermal activation conditions on two- to three-dimensional ZIFs, which significantly affect their structure, morphology, and properties. Their transform structure is evidenced by integrated X-ray diffraction technique , Thermogravimetric analysis , Scanning electron microscope, and Fourier transform infrared spectroscopy . Moreover, the performance of greenhouse gas adsorption (CO 2 and CH 4 ) applications is affected by the transformation through the thermal activation of materials. Therefore, understanding the activated conditions that impact material synthesis is crucial to maximizing the potential applications of ZIFs in various fields. The 2D ZIF-L has more exposed external surfaces and open structures, which makes it more reactive towards adsorptive reactants, unlike the 3D ZIFs. The 3D ZIFs have a robust structure and a higher porosity framework that can withstand challenging application conditions. Thus, it's essential to ensure appropriate activation conditions to maintain the functional properties of ZIFs, which are crucial for their optimal performance in various applications.
研究领域:
材料科学
·
化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Honglang Lu,Huanxiong Liang,Jianle Liu,Hui Zhou,Menghan Pi,Min Li,Bin Yan,Wei Li,Wei Cui,Rong Ran
Fogging prevention and environmental monitoring in a greenhouse are usually accomplished by different components, as the former relies on persistent surface-wetting capability, while the latter requires conductivity or capacitance to vary with ambient conditions. Combining these seemingly unrelated functions presents a significant challenge. Here, we report an all-in-one hydrogel that integrates these exclusive functions, enabling it to simultaneously work as an anti-fogging coating and environmental monitor in greenhouses. The strategy involves constructing loosely crosslinked hydrophilic networks enriched with abundant free ions and a specific amount of glycerol. The transparent hydrogel, composed of long-chain polymers, exhibits excellent adhesion to the inner surface of the greenhouse film and significantly decreases its water contact angle by filmwise condensation, thereby reinforcing the anti-fogging properties of the film without sacrificing its transparency. Meanwhile, the presence of glycerol and free ions enables the gel to sustain a wide range of temperature and humidity while displaying environmentally sensitive conductivity, endowing the gel with the same function as conventional rigid environmental sensors. As a proof-of-concept demonstration, a wireless indoor environmental monitoring system in a homemade lean-to greenhouse is established by utilizing hydrogel as the sensing module, which also performs well in prohibiting fogging on the greenhouse film. We hope this work could provide some inspiration for the development of multifunctional intelligent greenhouse films.
研究领域:
材料科学
·
农业技术
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Barbara Ting Wei Ang,Yin Mei Fong,Chew Beng Soh,Szu-Cheng Chien,Hui An,Ryan Hong Soon Tay
Tropical urban greenhouses are prone to heat trapping due to higher daily temperatures compared to temperate climates, and a high energy cost is required to maintain optimal growth conditions. Lanthanide-based nanoparticles are known for their capability of performing upconversion, a process where lower energy photons are absorbed and converted to a single photon of higher energy. These upconversion nanoparticles (UCNPs) possess the innate ability to convert infrared energy to visible light, thereby facilitating efficient heat removal while simultaneously providing upconverted visible light. Consequently, the incorporation of such material into greenhouse façades presents an attractive zero-energy alternative to commonly used greenhouse cooling technologies. In this study, NaYF4:Yb3+/Er3+ UCNPs were synthesized and coated onto a simulated greenhouse enclosure with Pak Choi plants to observe the effect of such a film coating on actual crop growth. A reduction of the interior temperature, increased sunlight diffusion, and improved crop yield were demonstrated in this work, showing promising results for future urban greenhouse façade applications.
研究领域:
农业科学
·
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 5
·2740-2746
·
IF 3.119
Jiayan Deng,Min Peng,Zhanyang Gao,Yi Wang,Baoshan Wang,Wenjun Zhou,Ruichao Peng,Yunbai Luo
Sulfur hexafluoride (SF6), which is known as a superior electrically insulating and arc-quenching medium, plays a decisive role in the modern transmission and distribution network of electric energy, especially in high-voltage power networks. However, the ever-increasing usage of SF6 also leads to the continuous escalation of atmospheric SF6 levels, which is considered to be the main cause of the greenhouse effect. To decrease this environmental impact, eco-friendly alternatives to SF6 have been researched for decades. To date, no significant success has been made regarding replacement gases for transmission networks. Some potential alternatives have comparatively lower global warming potential (GWP) but involve technical trade-offs. Thiazyl trifluoride, which has some excellent chemical and electric properties, is a novel substitution candidate for SF6. In this article, an efficient synthetic route starting from sulfur monochloride and followed by ammonization and fluorination was proposed. The structures of the intermediates and the target products were determined by X-ray diffraction (XRD), infrared spectroscopy (IR), and gas chromatography-mass spectrometry (GC-MS). The effects of some determining factors on the yield and purity, including the molar ratio of the reactants, recrystallization conditions and condensation temperature, were also investigated. The results showed that the overall yield of thiazyl trifluoride was approximately 25%, while the purity could be up to 90.6% under optimal conditions.
研究领域:
化学工程
·
环境科学
·
电气工程
✓ 已验证
DOI
PubMed
高影响因子
Environmental Science-Nano
·
2023
·Vol. 11
·期 1
·459-469
·
IF 7.3
Hu Meng,Zhiwen Liu,Xiaoxin Wang,Liang Feng
Compared with carbon dioxide, fluorinated greenhouse gases (F-type gases), such as hydrofluorocarbons (HFCs), perfluorocarbons (PFCs) and sulfur hexafluoride (SF6), have a stronger greenhouse effect, and their global warming potential can reach thousands or even tens of thousands of times that of carbon dioxide. Thus, the rapid online accurate detection of fluorinated greenhouse gases is highly desired and it can provide a basis for the evaluation of the greenhouse effect and a yardstick for the formulation of emission reduction measures. Unfortunately, these highly noble chemical gas molecules, especially at trace concentration levels, are extremely difficult to detect with conventional rapid screening methods. The use of the most common gas sensing techniques, semiconducting metal oxides, in the detection of HFCs and PFCs has not appeared within the scope of our knowledge. Herein, we report a novel N-doped tin oxide semiconducting metal oxide prepared by using a facile hydrothermal method. The experimental characterization results showed that the as-prepared materials were uniform spherical nanoparticles. The doping ratio of N-doped tin oxide was further optimized, and gas-sensing tests using these materials were carefully conducted. The results showed that the sensor had good detection performance for F-type gases, represented by SF6, C2F6 and C2H2F4, including low working temperature (200 °C), high selectivity, good repeatability, relatively high response, and low limit of detection (LOD ∼7 ppb). To the best of our knowledge, this is the first report on an F-type gas sensor based on semiconductor metal oxide. The ultra-fine particle size and uniform morphology of spherical particles, high concentration of oxygen vacancy defects and N doping contribute to the excellent performance of the sensor.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yuxing Shi,Zhouze Chen,Pengyu Hao,Pengnian Shan,Jialin Lu,Feng Guo,Weilong Shi
Photothermal-assisted photocatalytic hydrogen production is a very promising way to maximize solar energy utilization to obtain clean energy. Herein, we designed a composite photocatalyst with coating core-shell Fe 3 O 4 @SiO 2 nanoparticles on the surface of ZnIn 2 S 4 micro-flowers for high-efficient photothermal-assisted photocatalytic water/seawater splitting. Experimental results reveal that in the core-shell structure of Fe 3 O 4 @SiO 2 , the addition of the SiO 2 shell in Fe 3 O 4 @SiO 2 not only separates the photothermal and photochemical components, avoiding competition between them, but also further increases the temperature of the core in a manner similar to the greenhouse effect , which was used as a hot core to provide heat to the ZnIn 2 S 4 photocatalyst to increase the surface reaction temperature and enhance the collision chances of photo-generated carriers into causing severe recombination of carriers, thus promoting the hydrogen generation. Significantly, the optimal photocatalytic water/seawater splitting into hydrogen production rates over Fe 3 O 4 @SiO 2 /ZnIn 2 S 4 are up to 1258.5 and 1108.5 μmol g -1 h −1 , which are 11.9 and 14.7 times higher than that of pristine ZnIn 2 S 4 , respectively. This study provides an idea for the design of highly efficient photothermal-assisted photocatalysts.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Insects
·
2020
·Vol. 11
·期 2
·94
·
IF 2.22
Jihong Zhang,Huyin Li,Maorong Liu,Huan Zhang,Hai Sun,Hongtuo Wang,Lin Miao,Miaomiao Li,Ruihao Shu,Qilian Qin
Population control of small sucking insects has been challenging, and alternative control methods are constantly being sought. Visual traps have long been used to monitor and control pests. Colored sticky cards are widely used for diurnal pests, but their effects are influenced by environmental light conditions. Artificial light traps are mostly used for nocturnal pests. Here, we explored and evaluated light-emitting diode (LED) traps for the monitoring and control of small diurnal sucking insects using greenhouse tests targeting the greenhouse whiteflyTrialeurodes vaporariorum. We tested the trapping efficacy of the LED water pan trap, assessed the most attractive LED light and analyzed its efficacy under different weather conditions. The results showed that the LED water pan trap was too inefficient to be useful. Green LEDs were more attractive than yellow LEDs, UV LEDs and green-UV combinations. Regardless of sunny or cloudy conditions, the green LED trap caught more than twice the number of whiteflies than the yellow sticky card alone under summer shading conditions. Our study suggests that LED traps have a significant field application value in whitefly mass trapping and may also be efficient for other diurnal insects. The design of LED traps specific for diurnal insects is discussed.
研究领域:
昆虫学
·
农业科学
✓ 已验证
DOI
高影响因子
PEST MANAGEMENT SCIENCE
·
2024
·
IF 3.8
Jiayi Ma,Sheng Xiang,Yanxia Shi,Xuewen Xie,Ali Chai,Lei Li,Baoju Li,Tengfei Fan
BACKGROUND The use of pesticides in greenhouse vegetable cultivation is necessary and significant. However, traditional pesticide application methods such as the use of backpack sprayers with water-diluted pesticides have certain drawbacks, e.g., uneven distribution, high labor intensity, and safety risks. RESULTS In this work, fluazinam ultra-low-volume liquids (Flu-ULVs) were prepared using oily solvents as carriers. The effects of different oils on the physical properties of the preparations were investigated. The Flu-ULV can be sprayed directly using a hand-held ultra-low-volume (ULV) sprayer without dilution with water. Compared with commercial water-based suspension concentrates of fluazinam, the Flu-ULV samples showed better wetting of tomato leaves, better atomization, and more uniform droplet distribution. At a dosage of 300 mL/ha, the coverage rate of tomato leaves ranged from 32.47% to 79.3%, with a droplet deposition density of 556 to 2017 droplets/cm 2 . Application of Flu-ULVs provided 70.86% control efficacy against gray mold in tomatoes, which was higher than those achieved with reference products. Dermal exposure to Flu-ULVs was also evaluated in greenhouse experiments. The coverage rates for all parts of the operator's body ranged from 0.02% to 0.07%, with deposition volumes of 2.23 to 12.26 μg/cm 2 . CONCLUSION Ground ULV spraying of fluazinam was proved to be an effective and safe management option for the control of tomato gray mold in greenhouses. This study laid a foundation for the use of ultra-low volume spray to control vegetable diseases in greenhouse, especially those induced by high humidity environment. © 2024 Society of Chemical Industry.
研究领域:
植物保护
·
农学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Catalysis Science & Technology
·
2022
·Vol. 12
·期 15
·4871-4883
·
IF 6.177
Yu Zhang,Zhoujie Liang,Guojie Zhang,Jun Liu,Ying Wang,Yuqing Zhao,Guoqiang Li,Yongkang Lv
Greenhouse effect has become one of the serious issues in the human development. Greenhouse gases are mainly composed of methane and carbon dioxide. Dry methane reforming (DMR) is an excellent technology owing to the direct utilization of greenhouse gases. However, there are severe catalyst sintering and coke deposits in the process of DMR. Therefore, it is necessary to synthesize catalysts with fantastic properties. Here, a series of cobalt catalysts modified by different transition metals (Y, Gd, and Mn) were synthesized applying the impregnation method. The Y-modified catalyst shows excellent catalytic activity and anti-coking ability. Under the reaction condition of 800 °C, the catalyst exhibits not only the highest CH4 conversion (83%) but also stable CO2 conversion (94%) after 10 h of reaction. N2 physisorption, TG, H2-TPR, XPS, XRD and TEM were applied to research the crystal phase, microstructure and texture characteristics of the catalysts. The results show that the Mn-modified catalyst exhibited a negative influence for the DMR reaction although the catalyst shows a large specific surface area. Gd- and Y-modified catalysts exhibited superior interaction between the metal and carrier, which improves the stability of active metal Co during DMR. Simultaneously, the introduction of Y maintains more number of oxygen vacancies and improves the dispersion of the active metal. The study found that both the activity and coke resistance of the catalyst can be concurrently enhanced due to the addition of Y through promoting the dispersion of the metal and the activation of CO2. Most noteworthily, after a 50 h stability test, the CH4 and CO2 conversion on the Y-modified catalyst dropped from 91% and 95% to 83% and 94%, respectively.
研究领域:
化学工程
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）