COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Fengqin Li,Yuxue Hu,Xiaoming feng,Guizhong Tian
To mitigate the attachment of fouling organisms , Slippery Liquid-Infused Porous Surfaces (SLIPS) hold tremendous potential as a green and broad-spectrum antifouling solution, capable of replacing traditional antifouling coatings. However, the complexity of current preparation methods and the limited lifespan of lubricating oils constrain their widespread application in marine antifouling for vessels. In this study, melamine sponge (MS) was used as a substrate, and modifications were made by introducing superhydrophobic silica nanoparticles (SiO 2 NPs), a biocompatible adhesive (ethyl cyanoacrylate, ECA), and a highly stretchable polymer (poly-ε-caprolactone, PCL). By combining natural surface microstructures with additional nanomaterials , we successfully obtained a superoleophilic surface, effectively capturing liquid lubricants and maintaining their long-term stability. The sponge substrate possesses distinctive contractility, with the lubricant stored in the grid spontaneously compensating for the loss of surface lubricant, thereby effectively enhancing its durability. This study provides a straightforward fabrication method with reduced manufacturing costs for environmentally friendly marine anti-fouling coatings. The approach demonstrates a prolonged cyclic anti-fouling effect, effectively advancing the development of SLIPS for anti-fouling applications in shallow marine environments.
研究领域:
材料科学
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海洋生物学
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Zhaochao Deng,Songtao Hu,Leiming Tang,Lingbo Jiang,Junyu He,Keyu Shen,Yongjiu Xu,Rijin Jiang,Tiejun Li,Chunlei Chen,Bairu Chen,Hanghai Zhou,Dongdong Zhang,Jiawang Chen,Chunfang Zhang
The distribution characteristics and drivers of carbazole (CZ) and polyhalogenated carbazoles are still poorly understood. In this study, 96 samples were collected around the Zhoushan Archipelago, and their distribution characteristics were assessed. The results showed that CZ, 36-CCZ, and 36-BCZ were the top three abundant congeners in most collected samples. The bioaccumulation analysis revealed that marine plants prefer to accumulate CZ and bromocarbazoles rather than chlorocarbazoles. Both the mean concentrations of total carbazole and its derivants (ΣCZDs), as well as individual congeners, are the highest in sediments around the berthing areas of cargo ships and oil tankers . Meanwhile, ΣCZDs of these sediments are significantly influenced by the geo-weighted displacement of ships ( r = 0.61; p < 0.05), indicating the ballast water from these ships as potential contributor for marine CZDs. Moreover, the accumulation of CZ in plankton, planktonic origin of sedimentary organic matter, and relationship between CZ and C/N ratio ( p < 0.05) in sediments support the scenario that plankton absorbs and takes CZ into the sediments. These findings will promote the understanding of the sources, environmental behaviors, and fates of marine CZDs.
研究领域:
海洋生态学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Processes
·
2024
·Vol. 12
·期 9
·1798
·
IF 2.8
Yuanqing Wang,Wenyao Ma
A system combining gas-phase oxidation and liquid-phase collision absorption for removing NO from marine diesel engine exhaust was proposed. This method was the first to utilize different physical states of the same mixed solution to achieve both pre-oxidation and impingement reduction absorption of exhaust gases. During the pre-oxidation stage, a mixture of (NH4)2S2O8and urea solution was atomized into a spray using an ultrasonic nebulizer to increase the contact area between the oxidant and the exhaust gas, thereby efficiently pre-oxidizing the exhaust gas in the gas phase. In the liquid-phase absorption stage, the (NH4)2S2O8and urea solution was used in an impingement absorption process, which not only enhanced gas–liquid mass transfer efficiency but also effectively inhibited the formation of nitrates. Experimental results showed that, without increasing the amount of absorbent used, the maximum NO removal efficiency of this method reached 97% (temperature, 343 K; (NH4)2S2O8concentration, 0.1 mol/L; urea concentration, 1.5 mol/L; NO concentration, 1000 ppm; pH, 7; impinging stream velocity, 15 m/s), compared to 72% using the conventional liquid-phase oxidation absorption method. Additionally, this method required only the addition of a nebulizer and two opposing nozzles to the existing desulfurization tower to achieve simultaneous removal of sulfur and nitrogen oxides from the exhaust gas, with low retrofitting costs making it favorable for practical engineering applications.
研究领域:
环境工程
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化学工程
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产品关联
DOI
高影响因子
iScience
·
2023
·
IF 5.8
Junxiong Zhao,Yan Yang,Huirui Li,Shengchao Xu,Qifeng Wei,Xiulian Ren
The impact of ship emissions on the environment cannot be ignored and should be controlled. The possibility of applying seawater electrolysis technology and a novel amide absorbent (BAD, C 12 H 25 NO) to the simultaneous desulfurization and denitrification of ship exhaust gas is entirely confirmed by using various seawater resources. Concentrated seawater (CSW) with high salinity can effectively reduce the heat generated during electrolysis and the escape of chlorine. The initial pH of the absorbent can greatly affect the NO removal capacity of the system, and the BAD could keep the pH range suitable for NO oxidation in the system for a long time. The use of fresh seawater (FSW) to dilute the electrolysis of concentrated seawater (ECSW) to make an aqueous oxidant is a more reasonable scheme; the average removal efficiencies of SO 2 , NO, and NOx were 97.10%, 75.41%, and 74.28%, respectively. The synergistic effect of HCO 3 − /CO 3 2− and BAD was shown to further restrict NO 2 escape.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Environmental Progress & Sustainable Energy
·
2025
·
IF 2.3
Zhengxiong Jiang,Zhitao Han
With the aim to develop wet denitration process for marine application, it is still challenging to simultaneously achieve high-efficiency NO x removal from flue gas and low nitrate concentration in scrubbed solution. Herein a novel two-step method was proposed to solve this issue: phosphate buffer solution (PBS) with organic additive was used to absorb NO x efficiently from flue gas, and in next step, Na 2 SO 3 as a reductant was added in the scrubbed solution to reduce NO x off-line. Five typical organic additives were chosen to compose with PBS. The tetrabutylammonium bromide and phosphate buffer solution (TBAB/PBS) composite solution exhibited superior NO x absorption performance. Furthermore, the effects of TBAB concentration, NO x oxidation degree, solution pH, temperature and O 2 concentration on NO x absorption performance of TBAB/PBS composite solution were investigated systematically, and a high NO x absorption efficiency of >90% could be achieved. It was mainly attributed to a physical complex between PBS and NO 2 , N O 3 − $$ N{O}_3^{-} $$ , N O 2 − $$ N{O}_2^{-} $$ , together with a mass transfer enhancement by TBAB. A long-run test showed that nitrate concentration was much lower than the limit value of IMO. Cyclic absorption and regeneration tests confirmed that Na 2 SO 3 could effectively regenerate the scrubbed solution in the absence of O 2 .
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Green Energy
·
2023
·
IF 3.3
Yuhang Fan,Changxin Liu,Kaiyuan Zhao,Tong Shao,Ruoshui Chen,Yilin Pan,Zhijian Liu,Xinxiang Pan
Harmful gas leakage often occurs in the engine room of ocean-going ships. Among these harmful gases, NO2 gas accounts for a high proportion. Generally, sensors for detecting NO2 gas in the machinery space have problems such as small detection range, poor sensitivity, and poor stability. Therefore, we present a novel self-powered sensing prototype using electronic printing. This prototype consists of a flexible thermoelectric film and a flexible gas sensor. At 80K temperature difference, the maximum output voltage and power of the prototype reached 102.5 mv and 64.5μw, respectively. The prototype can charge the supercapacitor (5.5 V, 0.47uF) to 5.5 v in 10 minutes. The sensitivity, selectivity and repeatability of gas sensor in different concentration gas environment were studied. The results show that in the range of 20 -100 ppm, the detection current of NO2 concentration curve is approximately linear. The prototype has good stability and repeatability. After 1,000 flexibility tests, the prototype still has high flexibility. After connecting the boost circuit, the prototype can drive the single chip microcomputer to realize the self-power supply and danger. This study provides a new way for the monitoring of harmful gases in the ship engine rooms.
研究领域:
材料科学
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环境监测
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能源技术
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产品关联
DOI
高影响因子
ENERGY & FUELS
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2020
·
IF 3.421
Zhao Zhang,Song Zhou,Hongyuan Xi,Majed Shreka
A high nitrate concentration in scrubber water is a major factor that restricts ship applications of NOx wet absorption technology. In this paper, an absorption system (Na2SO3/NaHSO3) that can effectively improve NO2 absorption and reduce the concentrations of nitrate and nitrite was studied. Several factors that affect the NOx absorption efficiency and the concentrations of nitrate and nitrite were investigated in a bubble reactor by using Na2SO3 and Na2SO3/NaHSO3. In addition, the reaction mechanism for the process of NO2 absorption was deduced. The results illustrate that increases in S(IV) concentration and initial NO2 concentration could enhance the NOx absorption efficiency while increases in the NO/NO2 ratio and SO2 concentration decreased the NOx absorption efficiency. Moreover, the maximum NOx absorption efficiency was 97.8% at 0.15 mol/L S(IV) and 1400 ppm of NO2 when using the Na2SO3/NaHSO3 absorption system. The S(IV) concentration was the main factor affecting the NOx absorption efficiency and the concentrations of nitrate and nitrite. Increasing the SO2 concentration slightly affected the NOx absorption efficiency but was beneficial for decreasing the concentrations of nitrate and nitrite. The performance of the Na2SO3/NaHSO3 absorption system was better than that of Na2SO3 in the presence of oxygen. Furthermore, the minimum concentrations of nitrate and nitrite were 13.5 and 0 mg/L, respectively, in the Na2SO3/NaHSO3 absorption system for 1100 ppm of NO2 and 0.3 mol/L S(IV) and were much lower than current regulations for scrubber water. Finally, compared with other experimental results, the Na2SO3/NaHSO3 absorption system exhibits great potential for ship NOx wet absorption, and the addition of NaHSO3 plays a key role in decreasing the concentrations of nitrate and nitrite.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
Environmental Progress & Sustainable Energy
·
2022
·Vol. 42
·期 2
·e13998
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IF 2.824
Gang Liu,Zhitao Han,Jiawei Li,Zhen Wang,Shaosi Cheng,Yubin Liu,Jing Yu,Xinxiang Pan
Since it is difficult to deal with high-concentration nitrates in scrubbed wastewater onboard vessels, the application of traditional wet denitration technology is limited to some extent. Here a novel method for removing pre-oxidized NO x by using Na 2 SO 3 /THS composite solution is proposed with the aim to obtain high NO x absorption efficiency and low nitrate concentration in scrubbed wastewater simultaneously. The effects of Na 2 SO 3 concentration, THS concentration, NO x oxidation degree, coexistence of SO 2 and O 2 in flue gas, initial pH value and temperature of absorption solution on denitration performance were discussed in detail. The results showed Na 2 SO 3 could reduce NO x to nitrate, nitrite, and N 2 . The addition of THS could promote NO x absorption greatly by forming complexes with SO 3 2− . When initial NO x concentration was 1000 ppm with a NO x oxidation degree of 50%, O 2 concentration was 8%, Na 2 SO 3 and THS concentrations were 25 and 20 mmol/L, a NO x absorption efficiency of 87% could be achieved, while nitrate and nitrite concentrations were 32.97 and 14.19 mg/L, respectively.
研究领域:
环境工程
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海洋工程
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化学工程
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产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 30
·期 19
·56198-56206
·
IF 5.8
Wang Tianshu,Shi Peibo,Wang Mingyu,Zhang Shaojun
Oily sewage discharged from ships has brought many harms to the marine environment, even endangered marine life and human life. As a new type of water treatment technology, microbial fuel cell (MFC) can efficiently treat pollutants and recover energy, which can be converted into electric energy. However, its large internal resistance restricts its development. In order to solve the problems of low power generation performance and poor biocompatibility of microbial fuel cell, a gold nanoparticle-carbon quantum dot/polydopamine/graphene oxide/bacterial cellulose (AuNP-CQD/PDA/GO/BC) electrode was prepared, and it was applied to the treatment of oily sewage from ships. Fourier transforms infrared spectroscopy, X-ray diffraction, scanning electron microscopy, gas chromatography-mass spectrometry, and contact angle measuring instrument were used to characterize the electrode. The results show that PDA bridges GO and AuNP-CQD particles through the electrostatic interaction/π-π bond/hydrogen bonding, respectively. This attracts a large number of microorganisms to attach to the surface of the porous anode material, which greatly improves the activity and quantity of microorganisms. Moreover, the maximum power density of AuNP-CQD/PDA/GO/BC electrode is 2624.91 mW/m 2 , which obviously improves the electrochemical performance of MFC. The oil content of the treated water is ≤ 15 mg/L, reaching the discharge of MARPOL 73/78 convention. Therefore, the proposed approach has paved new dimensions in not only the preparation of a new composite electrode materials but also its applications as effective degradation of ship oily sewage in MFC.
研究领域:
环境科学
·
材料科学
·
微生物学
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产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Shilong Zhang,Shuyang Tan,Yajun Deng,Bo Wu,Yanling Yang,Jiangfan Chang,Xianhui Zhang,Baiyi Chen,Jianhua Wu
Traditional antifouling coatings often lack the combined capabilities of static antifouling and dynamic fouling-release, which are critical for marine propellers. This study addresses this limitation by developing pH-sensitive polysiloxane coatings that integrate both functionalities. Two coating systems, PS-Levo and PS-PLL, were synthesized by incorporating levofloxacin (Levo) and polylysine (PLL) as antifouling agents, respectively. PS-Levo was synthesized via an epoxy-carboxylic acid ring-opening reaction, while PS-PLL was obtained through an amine-hydrosilylation reaction, using APTES as the curing agent. A key innovation of these coatings is their pH-triggered hydrolysis. Marine microorganisms that form biofilms on the coating surface can alter the microenvironmental pH through their metabolic activities, either lowering or raising it, thereby promoting the release of antifouling agents. The coatings exhibited remarkable antifouling efficacy, achieving bactericidal and anti-algal rates of over 99% and 97%, respectively. Following a 180-day immersion of the coated panels in natural seawater, minimal marine biofouling adhered to the coated surfaces and could be effortlessly removed by simple rinsing, thereby demonstrating excellent static antifouling and dynamic fouling-release performance. Moreover, the PS-Levo and PS-PLL coatings exhibited outstanding adhesion, mechanical properties, and corrosion resistance. This research introduces an innovative strategy for combating biofouling on marine propellers and presents significant potential for practical applications in the marine antifouling industry.
研究领域:
海洋科学
·
材料科学
·
表面工程
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环境化学
·
生物技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Bingchen Zhou,Tianzong Jiang,Yanqi Yin,Zewei Sun,Zichen Lu,Shili Gai,He Ding,Piaoping Yang
Temperature-driven hydrogel actuators exhibit great potential due to their stimulus responsiveness property, flexible design, and low energy consumption. However, the asymmetry of the conventional bilayer hydrogel makes the structure with low interfacial toughness and more prone to delamination. Herein, the polyacrylamide-polydopamine/photo-initiated-poly (N-isopropylacrylamide)‑sodium alginate-CaCl 2 (PPM/ p -PM-Alg-Ca 2+ ), a hetero-structured bilayer hydrogel featuring a transition layer, was developed. Due to the good water absorption of the p -PM-Alg-Ca 2+ layer, the pre-solution of the PPM penetrated into the p -PM-Alg-Ca 2+ layer and formed interpenetrating networks to achieve topological entanglement at the interface, obtaining a bilayer hydrogel with a transition layer. The bilayer hydrogel demonstrates the performance of rapid response actuation (30 s bending from 0° to 320°) and recovery capability (40 s restoring to original state), good signal conversion ability and fast response time (40 ms), and good photothermal performance (heated to 66 °C within 7 min under 808 nm laser irradiation). The transition layer enhanced the interfacial toughness (17.0 kPa) to inhibit the separation of bilayer structure. The hydrogel integrates into the sensor and actuator to realize the non-contact security alarm, dynamic monitor of a ship, and actuator for item collection, providing an integrated solution for the intelligent upgrading of ships and effectively supporting the construction of an intelligent system.
研究领域:
材料科学
·
高分子科学
·
智能材料
·
传感器与驱动器
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机械工程
·
船舶与海洋工程
✓ 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）