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一井内巷道贯通误差预计及软件开发 被引量:2
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作者 李付岗 蔚科 《科技视界》 2020年第13期169-171,共3页
本文平台开发了一款基于的一井内巷道贯通误差预计软件。该软件能够对一井内巷道贯通测量的重要方向及高程方向进行误差预计,具备导线网平差的功能。实例验证了程序的正确性和可靠性。
关键词 矿山测量 贯通测量 误差预计 导线网平差
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Preparation of magnetic core-shell Ce-doped zirconia and its As(Ⅲ)adsorption properties
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作者 Ming-han DU Hong YANG +7 位作者 Weng FU Yan-ling HU Huan TAO Jia-xi FAN Ying LIU Yu-fan CHEN Na-er DILI Xiao-qing LIU 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2022年第12期4156-4170,共15页
A new magnetic mesoporous As(Ⅲ)adsorbent of Fe_(3)O_(4)@SiO_(2)@Ce-ZrO_(2)was prepared by solvothermal and sol^(-)gel method.The core-shell adsorbent presented a high specific surface area(168.2 m^(2)/g)and fast magn... A new magnetic mesoporous As(Ⅲ)adsorbent of Fe_(3)O_(4)@SiO_(2)@Ce-ZrO_(2)was prepared by solvothermal and sol^(-)gel method.The core-shell adsorbent presented a high specific surface area(168.2 m^(2)/g)and fast magnetic separation performance(5.37 A·m^(2)/kg).Compared with Fe_(3)O_(4)@SiO_(2)@ZrO_(2),the Ce-doped sample exhibited 12%-23%increase in As(Ⅲ)uptake over p H 3-11,which was mainly attributed to the formation of bimetal M—O—As complexes.The coexisted SO^_(4)(2-)and PO^_(4)(3-)weakened As(Ⅲ)adsorption,Ca^(2+)worked oppositely,but the impact of Cl^(-)and NO_(3)^(-)was negligible.The As(Ⅲ)maximum adsorption capacity was 24.52 mg/g at 313 K with an initial As(Ⅲ)concentration of 5 mg/L at pH 7,and its kinetics was well fitted by the pseudo-second-order model.Moreover,the adsorbent exhibited remarkable recyclability.It is suggested that Fe_(3)O_(4)@SiO_(2)@Ce-ZrO_(2)is a promising adsorbent for the advanced treatment of As(Ⅲ)contaminated wastewater. 展开更多
关键词 core-shell structure MAGNETISM cerium doping ZIRCONIA As(Ⅲ)adsorption
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