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Hou X, Sun H, Dong F, Wang H, Bian Z. 3D carbonized grooved straw with efficient evaporation and salt resistance for solar steam generation. CHEMOSPHERE 2023; 315:137732. [PMID: 36608882 DOI: 10.1016/j.chemosphere.2022.137732] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 11/21/2022] [Accepted: 12/31/2022] [Indexed: 06/17/2023]
Abstract
Solar steam generation (SSG) is considered an effective solution to the global shortage of freshwater resources. To solve the practical application challenges of SSG in remote outdoor environments where electricity is scarce, it is of great importance to developing new solar evaporators. In this study, a three-dimensional (3D) biochar solar evaporator based on carbonized grooved straw was prepared from agricultural waste corn straw, which had high solar energy conversion efficiency and excellent salt resistance. The existence of grooves increases the surface area to absorb more sunlight and makes the light multilevel reflection improve the evaporation rate. The excellent light absorption, super hydrophilic, and heat shielding properties of 3D carbonized grooved straw resulted in a good evaporation rate (1.57 kg⋅m-2·h-1) and energy efficiency (85.9%) under 1 sun irradiation. The 3D grooved biochar solar distiller also demonstrated efficient formation evaporation performance and excellent salt resistance in practical applications in seawater desalination and surface water purification. The 3D grooved biochar solar distiller prepared from agricultural waste has the advantages of being economical and environmentally friendly, with good application prospects.
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Affiliation(s)
- Xiangting Hou
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China
| | - Haiying Sun
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China
| | - Fangyuan Dong
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China
| | - Hui Wang
- College of Environmental Science and Engineering, Beijing Forestry University, Beijing, 100083, PR China.
| | - Zhaoyong Bian
- College of Water Sciences, Beijing Normal University, Beijing, 100875, PR China.
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Zhang Y, Duan H, Chen E, Li M, Liu S. Physicochemical Characteristics and the Scale Inhibition Effect of Air Nanobubbles (A-NBs) in a Circulating Cooling Water System. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1629-1639. [PMID: 36648293 DOI: 10.1021/acs.langmuir.2c03075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Air nanobubbles (A-NBs) in a circulating cooling water system have not been investigated, although their role is significant. In this paper, the influences of the contents of main salts and other parameters on the physicochemical characteristics and scale inhibition performance of A-NBs in circulating cooling water were investigated and the scale inhibition mechanism of A-NBs in a simulated circulating cooling water system was explored. A-NBs realized a higher scale inhibition rate of 90%, which was higher than that of 1-hydroxyethane-1,1-diphosphonic acid (40%), and A-NBs stably existed for more than 5 days in the complex water environment. Four interface functions were proposed to interpret the scale inhibition effect of A-NBs in circulating cooling water as follows. First, the negatively charged surface of A-NBs adsorbed cations (Ca2+) reduced the concentration of scaling ions. Second, the negatively charged surface of A-NBs could also adsorb microcrystals, and their crystal-like seed action was conducive to the formation of large-size crystals, broke the rules of crystal growth, and reduced the adhesion of scales to the pipe wall. Third, A-NBs could also form a bubble layer after they were adsorbed on the inner surface of pipes, thereby preventing the deposition of scales on the surface. Fourth, A-NB burst caused local turbulence, increased the shear force onto the pipe surface, and reduced the scales adhering to the pipe surface. The interface effect of A-NBs in metal pipes is important in many industrial applications. This study laid the basis for the development of a new green A-NB scale-inhibiting technology.
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Affiliation(s)
- Yuling Zhang
- Department of Environmental Science and Engineering, North China Electric Power University, 071003Baoding, Hebei, P. R. China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, 102206Beijing, P. R. China
| | - Haiyang Duan
- Department of Environmental Science and Engineering, North China Electric Power University, 071003Baoding, Hebei, P. R. China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, 102206Beijing, P. R. China
| | - Erjun Chen
- Department of Environmental Science and Engineering, North China Electric Power University, 071003Baoding, Hebei, P. R. China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, 102206Beijing, P. R. China
| | - Ming Li
- Department of Environmental Science and Engineering, North China Electric Power University, 071003Baoding, Hebei, P. R. China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, 102206Beijing, P. R. China
| | - Songtao Liu
- Department of Environmental Science and Engineering, North China Electric Power University, 071003Baoding, Hebei, P. R. China
- MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and Engineering, North China Electric Power University, 102206Beijing, P. R. China
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Efficient and sustainable electro-sorption of rare earth by laser-induced graphene film. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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