Materials Advances
·
2021
·Vol. 2
·期 9
·3088-3098
·
IF 0
Jia-Yun Wang,Xiao-Xiao Guo,Jun Chen,Shi-Chang Hou,Hui-Juan Li,Abdul Haleem,Sheng-Qi Chen,Wei-Dong He
Photothermal water evaporation, benefiting from solar energy, is one hot topic concerning seawater desalination, sewage treatment, and water recovery. Commonly, the photothermal evaporation system consists of photothermal material supported by certain matrices with fundamental necessities. Poly(acrylic acid) (PAAc) cryogels, prepared at the temperature below the freezing point of polymerization mixture, are hierarchically macro-porous and highly hydrophilic with rapid water uptake, speedy water transport, and low thermal conductivity. Moreover, PAAc has the acid-doping ability for polyaniline and polypyrrole (PPy), which faciliates the good incorporation of photothermal materials in a cryogel matrix. Thus, the PAAc cryogel is an excellent platform for photothermal water evaporation. In this research, we prepared PAAc cryogels, incorporated different photothermal materials, and constructed the modular water evaporation systems. The photothermal evaporation rate of pure water with the PAAc-PPy cryogel system reached as high as 1.819 kg m−2 h−1 while its apparent efficiency surprisingly exceeded 100%. These modular systems exhibited excellent long-term and recyclable utility. As for the photothermal evaporation of salty water, the precipitated salt solid could be spontaneously dissolved during the light turnoff due to the quick water transport, maintaining the high water-to-vapor conversion. This study represents an ideal matrix platform, PAAc cryogel, for photothermal evaporation and opens up a new route to improve the photothermal evaporation technique for water purification and seawater desalination.
研究领域:
材料科学
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环境科学
·
能源研究
✓ 已验证
产品关联
DOI
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2015
·
IF 2.037
Rongrong Li,Jian Wan,Yingjie Zhang,Danxia Liang,Bin Zhang,Chenghong Li
The equilibrium solubility of sodium 1-naphthalenesulfonate in binary NaCl + water, Na2SO4 + water, and C2H5OH + water solvent mixtures was measured by a steady-state method at elevated temperatures from (278.15 to 323.15) K. The results of these data were correlated by a modified Apelblat equation. The dissolution enthalpy (ΔHd) and entropy (ΔSd) of sodium 1-naphthalenesulfonate in solutions of different mole fraction were obtained.
研究领域:
物理化学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Junpeng Li,Rui Bai,Wei Chen,Chongyuan Ren,Fan Yang,Xiaochun Tian,Xiaofeng Xiao,Feng Zhao
Mineralization of lead ions (Pb 2+ ) to pyromorphite using phosphorus-containing materials is an effective way to remediate lead (Pb) contamination. Bone char is rich in phosphorus, but its immobilization of Pb 2+ is limited by poor phosphate release. To utilize the phosphorus in bone char and provide a suitable growth environment for phosphate-solubilizing bacteria, bone char and Pseudomonas rhodesiae HP-7 were encapsulated into bio-beads, and the immobilization performance and mechanism of Pb in solution and soil by bio-beads were investigated. The results showed that 137 mg/g of phosphorus was released from bone char in the presence of the HP-7 strain. Pb 2+ removal efficiency reached 100 % with an initial Pb 2+ concentration of 1 mM, bone char content of 6 g/L, and bio-bead dosage of 1 %. Most Pb 2+ was immobilized on the surface of the bio-beads as Pb 5 (PO 4 ) 3 Cl. The soil remediation experiments showed a 34 % reduction in the acid-soluble fraction of Pb. The bio-beads showed good stability in long-term (30 d) soil remediation. The present study shows that bone char can be turned into an efficient Pb immobilization material in the presence of phosphate-solubilizing bacteria. Thus, bio-beads are expected to be used in the remediation of Pb-contaminated environments.
研究领域:
环境科学
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
WATER RESEARCH
·
2024
·
IF 11.4
Peng Feng,Donghai Xu,Youwei Zhi,Bing He,Shuzhong Wang,Yaling He,Yang Guo
This work aims to explore the ability of molten salt to solve salt deposition in supercritical water (SCW) related technologies including supercritical water oxidation and supercritical water gasification, with KNO 3 and Na 2 SO 4 as examples. In the pure KNO 3 solution, the two-phase layering of high-density KNO 3 molten salt (settling at the reactor bottom) and low-density saturated KNO 3 -SCW salt solution (flowing out at the top outlet of the reactor) was formed in a kettle-reactor with about 6.5 ratio of depth to inner diameter, thereby improving the accuracy of measured solubilities. The precipitation macro-characteristics of mixed KNO 3 and Na 2 SO 4 in SCW were investigated under different feed concentration conditions. The results showed that Na 2 SO 4 deposition on the reactor sidewall could be reduced by more than 90 % when the mass ratio of KNO 3 to Na 2 SO 4 in the feed was only 0.167. No visible salt deposition was observed on the sidewall when the ratio was 0.374. All solid deposited salts were converted into the liquid molten salt as the ratio reached 3.341, and thus could easily flow out of the reactor, without plugging. ‘Molten salt dissolution’ mechanism may provide a more plausible explanation for mixed KNO 3 and Na 2 SO 4 in SCW. In addition, the precipitation micro-mechanisms of mixed KNO 3 and Na 2 SO 4 , and the critical conditions of avoiding sidewall deposition and reactor plugging were proposed. This work is valuable for overcoming the salt deposition problem in SCW-related technologies.
研究领域:
化学工程
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环境科学
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超临界流体技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
AICHE JOURNAL
·
2022
·Vol. 69
·期 1
·e17894
·
IF 4.167
Bingwen Long,Keke Yao,Shijie Zhu,ZuHong Li,Tong Li,Fuli Deng,Hua Deng,Yigang Ding
A thermodynamic and kinetic study of the dissolution properties of urea phosphate (UP) in water is performed using a Calvet type microcalorimeter. Calorimetric measurements reveal the dissolution is endothermic and the heat is perfectly proportional to the amount of UP dissolved, yielding an enthalpy of (33.755 ± 0.65) kJ/mol. By combining the enthalpy data of our measurements and literature, we derive the enthalpies of urea-phosphoric acid adduct reaction, formation of solid UP and UP dissociation. Dissolution kinetics parameters are estimated using the collected dynamic calorimetric data that are well represented with quasi-second-order kinetic model, giving an activation energy of (16.7 ± 2.7) kJ/mol. Thermodynamic modeling of the pH difference between UP and phosphoric acid solutions shows the degree of UP dissociation decreases from 74% to 42% when UP molality increases from 0.02 to 1 mol/kg. Furthermore, the species molality distributions in UP solutions are calculated based on mass balance and the dissociation equilibrium relations considered.
研究领域:
物理化学
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热力学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2014
·Vol. 21
·期 4
·909-915
·
IF 1.836
Xie Bo,Mai Yongjin,Wang Jinglun,Luo Hao,Yan Xiaodan,Zhang Lingzhi
A dinitrile compound containing ethylene oxide moiety (4,7-dioxa-1,10-decanedinitrile, NEON) is synthesized as an electrolyte solvent for high-voltage lithium-ion batteries. The introduction of ethylene oxide moiety into the conventional aprotic aliphatic dinitrile compounds improves the solubility of lithium hexafluorophosphate (LiPF 6 ) used commercially in the lithium-ion battery industry. The electrochemical performances of the NEON-based electrolyte (0.8 M LiPF 6 + 0.2 M lithium oxalyldifluoroborate in NEON:EC:DEC, v : v : v = 1:1:1) are evaluated in graphite/Li, LiCoO 2 /Li, and LiCoO 2 /graphite cells. Half-cell tests show that the electrolyte exhibits significantly improved compatibility with graphite by the addition of vinylene carbonate and lithium oxalyldifluoroborate and excellent cycling stability with a capacity retention of 97 % after 50 cycles at a cutoff voltage of 4.4 V in LiCoO 2 /Li cell. A comparative experiment in LiCoO 2 /graphite full cells shows that the electrolyte (NEON:EC:DEC, v : v : v = 1:1:1) exhibits improved cycling stability at 4.4 V compared with the electrolyte without NEON (EC:DEC, v : v = 1:1), demonstrating that NEON has a great potential as an electrolyte solvent for the high-voltage application in lithium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Recycling
·
2023
·Vol. 8
·期 5
·68
·
IF 4.3
Austen Rowell,Tewodros Ghebrab,Randall Jeter
Microbial treatment of recycled concrete aggregate (RCA) may improve the quality of the aggregate, and enhance its use in the production of structural concrete and promote the recycling of concrete waste. The mortar phase of the RCA is responsible for the poor performance of the aggregate. Treating the old adhered mortar or removing it from the natural aggregate (NA) is an option to make RCA beneficial for the production of quality recycled aggregate concrete (RAC). Removing the adhered mortar from recycled concrete aggregate using silicate-solubilizing bacteria was investigated. The bacteria could synthesize the silicates in the calcium silicate hydrate phase of the cement paste leading to the breakdown of the old adhered mortar. Four SSB strains were tested for survivability and activity in an alkaline medium to simulate the concrete environment. TheSerratia marcescensbacterial strain, which survived the environment, was inoculated into screw-cap glass vials containing recycled concrete aggregate fragments and glucose-enhanced nutrient broth and then incubated for 14 days. Partial removal of the old adhered mortar was observed based on the weight lost from the RCA. TheS. marcescensbacterial strain could survive the alkaline concrete environment and solubilize the silicates present in cement paste resulting in the removal of the old adhered mortar.Keywords:recycled concrete aggregate;silicate-solubilizing bacteria;recycled aggregate concrete;Serratia marcescens;old adhered mortar
研究领域:
微生物学
·
土木工程
·
材料科学
✓ 已验证
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2019
·
IF 6.35
Hong-Zhe Li,Qing-fang Bi,Kai Yang,Bang-Xiao Zheng,Qiang Pu,Li Cui
Increasing the bioavailability of immobilized phosphorus (P) in soil by phosphate-solubilizing bacteria (PSB) is an effective strategy for sustainable agronomic use of P and for mitigating the P crisis. Here, D2O isotope labeling combined with single-cell Raman spectroscopy (Raman–D2O) was developed as an efficient activity-based approach to characterizing the presence and activity of PSB in a culture-independent way. On the basis of the finding that PSB were significantly more active than non-PSB in the presence of insoluble P, a C–D Raman band from active assimilation of D2O-derived D was established as a biomarker for both inorganic-phosphate-solubilizing bacteria and organic-phosphate-solubilizing bacteria. C–D ratios (intensities of C–D bands as percentages of the intensities of both the C–D and C–H bands) were further established as semiquantitative indicators of P-releasing activities because of the consistency between the C–D ratio and the concentration of solubilized phosphate or acid phosphatase activity as measured by conventional bulk assays. By applying Raman imaging, single-cell Raman–D2O clearly discerned PSB in a mixed-soil bacterial culture and even in complex soil communities. Remarkable heterogeneity of microbial activity, ranging from 2 to 30% (close to that in medium without P and that in medium with sufficient soluble P, respectively), was revealed at the single-cell level and clearly illustrated the subpopulation of soil bacteria active in solubilizing P. This work not only enables probing PSB and their P-releasing activities but also opens a window to explore more diverse microbial resources when obtaining related isotope-labeled substrates is prohibitive.
研究领域:
微生物学
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土壤科学
·
环境生物学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
·
2025
·
IF 4.4
Peng Feng,Donghai Xu,Kunkun Song,Gang Yin,Guanyu Jiang,Yang Yang,Yaling He
Supercritical water oxidation efficiently degrades organic waste but faces challenges from salt deposition due to the low solubilities of salts in supercritical water (SCW). This study investigated the characteristics and mechanisms of dissolution and deposition of mixed sulfate and chloride salts in SCW. At low water densities the common ion effect was observed in Na 2 SO 4 /K 2 SO 4 mixtures. Na + tended to occupy the junctions between SO 4 2- , while K + tended to occupy the cluster endings. Due to the weaker electrostatic interaction between K + (with larger ionic radius) and SO 4 2- , large and medium-sized clusters were more prone to decomposition in K + -rich solutions. K 2 SO 4 induced a “salting-in” effect on Na 2 SO 4 , whereas Na 2 SO 4 exerted a “salting-out” effect on K 2 SO 4 at high water densities. Both sulfates exhibited heterogeneous nucleation, depositing on heated sidewalls as nucleation sites, with Na 2 SO 4 proving more difficult to remove than K 2 SO 4 . In KCl/Na 2 SO 4 mixtures, homogeneously nucleated chloride salts created many preferential nucleation sites for Na 2 SO 4 deposition.
研究领域:
化学工程
·
物理化学
·
环境科学
·
材料科学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
Polymers
·
2023
·Vol. 16
·期 1
·107
·
IF 5
Yu Liu,Hui Gao,Shanshan Liu,Jinrong Li,Fangong Kong
Nitrification inhibitor is essential for increasing the nitrogen utilization efficiency of agricultural plants, thus reducing environmental pollution and increasing crop yield. However, the easy volatilization and limited functional property is still the bottleneck of nitrification inhibitors. Herein, a novel water-soluble polymeric nitrification inhibitor was synthesized through the copolymerization of acrylamide and bio-based acrylic acid, which was synthesized from biomass-derived furfural, and the complexation of carboxyl groups and 3,4-dimethylpyrazole. The results showed that the nitrification inhibitor was an amorphous polymer product with a glass transition temperature of 146 °C and a thermal decomposition temperature of 176 °C, and the content of 3,4-dimethylpyrazole reached 2.81 wt%, which was 115% higher than our earlier product (1.31 wt%). The polymeric nitrification inhibitor can inhibit the activity of ammonia-oxidizing bacteria effectively, thus inhibiting the conversion of ammonium nitrogen to nitrate nitrogen and converting the insoluble phosphate into soluble and absorbable phosphate. By introducing a copolymer structure with a strong flocculation capacity, the polymeric nitrification inhibitor is further endowed with a soil-loosening function, which can increase the porosity of soil to improve the soil environment. Therefore, the nitrification inhibitor can be used in water-soluble and liquid fertilizers, as well as in high tower melting granulated compound fertilizers.
研究领域:
农业化学
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土壤学
·
环境科学
·
高分子科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Food & Function
·
2024
·
IF 5.1
Xinyi Li,Qi Tao,Qiuhui Hu,Ning Ma,Gaoxing Ma
Pleurotus eryngii protein is considered high quality protein based on its rich and comprehensive essential amino acids, and has also been proved displaying multiple significant functional characterizations of which vary with its fabrication process. We aimed to investigate the variation differences of P. eryngii protein extracted by alkaline extraction and acid precipitation (AA), cellulase complex alkaline extraction and acid precipitation (CAA), ultrasound assisted alkaline extraction and acid precipitation (UAA), and salt dissolution method (S) from the perspective of gastrointestinal digestion and fecal fermentation consequences. Protein hydrolysis and structural analysis was performed on after in vitro gastrointestinal digestion, and found that AA had the highest hydrolysis degree while CAA had the lowest. The results of fluorescence chromatography and infrared chromatography indicated that the reasons for the digestion difference might be the unfolding degrees of protein tertiary structure and the polysaccharide which was the highly contained component in crude protein and had the opportunity to prevent protein hydrolysis. Metagenomic analysis suggested that compared with other groups, AA had excellent biological functions including regulating obesity and insulin related microbiota. This study could provide new theoretical basis for the P. eryngii protein as a novel type of nutrient and functional component, and contribute to the development of constructing a diversified emerging food protein supply system.
研究领域:
食品科学
·
营养学
·
微生物学
·
蛋白质化学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）