2 research outputs found

    一种“海绵-微藻”集成系统净化养殖污水的方法

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    本发明涉及受污染海水环境的生物修复技术,是一种“海绵—微藻”集成系统净化养殖污水的方法,1)首先在工厂化养殖废水中接种海洋饵料微藻,生物转化海水中无机N、P盐为微藻生物量;2)接种微藻3-24小时后,然后将海绵放到微藻生物量增加的养殖废水池中,滤食微藻;利用“海绵 —微藻”集成系统清除养殖海水中无机N、P盐,并转化为微藻和海绵生物量,使污染水体得到净化。本发明利用生物转化的方法,间接清除养殖海水中过量的无机N、P盐,减轻环境压力;同时增加海绵自身生物量。具有广泛的应用前景,并将产生很大的经济效益和社会效益。带填

    Optimized Parameters for Electrochemical Fabrication of P-type Silicon-Based Two-dimensional Photonic Crystals

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    利用光刻技术与碱性腐蚀等工艺预写晶格图样,采用电化学腐蚀方法在P〈100〉型硅基底制备二维大孔硅光子禁带结构.结果表明:在预写有晶格图样的P〈100〉型硅基底上由电化学阳极氧化制备的二维大孔硅,其孔洞的生长速率、深宽比及表/侧面形貌与电解质配比方案及阳极电流密度均密切相关.在优化的电化学工艺参数下得到的空气洞阵列,具有近乎完美的二维四方晶格,晶格常数为3.8μm,孔洞直径约3.0μm,孔洞深宽约90μm,深宽比达30.该方法可用于制备在中红外或近红外波段具有完全二维光子带隙的光子晶体.A two-dimensional photonic band structure based on macroporous silicon with a gap centered at 20μm has been achieved for the first time.A medium doped p-type(100) silicon substrate was patterned by the standard photolithograpgy and alkaline efthing.And this pre-patterned sample was then etched 90 μm deep by electrochemical pore formation in the mixture of hydrofluoric-acid and dimethylformamide(DMF) to produce a quare lattice of circular air rods with a lattice constant of 3.8 μm and the very high aspect ratio up to 30.The optimized electrochemical parameters such as eletrolytical components and the current density were 5 % HF(by mass)+7 % H_(2)O(by mass)+DMF and 12 mA/cm~(2) respectively.the pore formation technique should allow the fabrication of photonic lattices with a complete two-dimensional photonic band gap in the middle and near infrared.作者联系地址:国防科技大学光子/声子晶体研究中心,国防科技大学光子/声子晶体研究中心,国防科技大学光子/声子晶体研究中心,国防科技大学光子/声子晶体研究中心,国防科技大学光子/声子晶体研究中心 湖南长沙410073,湖南长沙410073,湖南长沙410073,湖南长沙410073,湖南长沙410073Author's Address: Research Center of Photon and Phonon,National Univ.of Defense Technology,Changsha 410073,Chin
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