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- 저자 : Gu Juanjuan (검색결과 2 건)
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Design of Antenna with Low Intensity RFID Wireless Network Signal
Zheng Juan,Gu Juanjuan 보안공학연구지원센터 2016 International Journal of Future Generation Communi Vol.9 No.10
Testing direction and relative distance nearest to test position of environmental field intensity are analyzed using simulating calculation, taking three-dimensional cube good conductor as general test equipment, under vertical incidence of single plane wave, the effect of electrical size of the test equipment on test point selection is analyzed; incident angle of plane wave is transformed to calculate an relative error between selected position field intensity and environmental field intensity in oblique incidence condition so as to meet the demand of the experiment; and then promote it to reverberation chamber which is distributed as superposed field of multiple columns plane wave, make an analytical calculation on relative error , which can be controlled within 3%, of selected test point to satisfy the experimental requirements, and it can be applied to practical test.
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Biosorption mechanism of Zn from aqueous solution by spent substrates of pleurotus ostreatus
XiaoJing Hu,JuanJuan Qu,LiLong Yan,Haidong Gu,TingTing Zang,Yu Jin 한국화학공학회 2014 Korean Journal of Chemical Engineering Vol.31 No.11
To solve the problem of heavy metal pollution and agricultural wastes reclamation, spent substrate of pleurotusostreatus (SSPO) was used as adsorbent to remove Zn2+from aqueous solution. The biosorption of zinc ions on SSPOwas studied as a function of the solution pH, temperature and initial Zn2+concentration. The equilibrium sorption datawere well represented by linear Langmuir isotherm models with R2value of 0.9955 and non-linear Freundlich withR2value of 0.9973. The BET surface area of SSPO can reach 51.16 m2g−1. SEM-EDX and XRD revealed that (NH4)2Zn·H2O and Zn2PO4(OH) were the main compounds in metal-loaded SSPO. FTIR analysis indicated the governing func-tional groups such as O-H, N-H and P=O played an important role in biosorption. The desorption studies showed thereversibility of SSPO. The results indicate that SSPO is a potential adsorbent in wastewater treatment due to its greatsorption capacity and low cost.
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