The silica-ortho-phenylenediamine(RHAOPDA) derived from Rice Husk Ash and o- phenylenediamine (OPDA) were synthesized. The prepared material was characterized by different techniques; N₂- adsorption-desorption measurements of the synthesized material showed that the surface area for RHAOPDA is 25.10 m² g⁻¹ with a mean pore diameter of 15.10 nm. CHNS and FT-IR analyses proved that the o-phenylenediamine was successfully incorporated on modified silica RHACI. X-ray diffraction technique been showed the amorphous nature of RHAOPDA with maximum intensity at 22° (2θ), while the scanning electron microscopy (SEM) technique showed that the shapes of the particles resemble the fruit of the cauliflower with average particle size to be 22.62 nm. Thermogravimetric analysis (TGA-DTA) of RHAOPDA indicated that the physically adsorbed water was lost between (30–150) °C which means it is weakly bonded in the silica- ortho-phenylenediamine, while the residual parts of material decomposed up to 820 °C. The RHAOPDA showed a high possibility for uptake and removal of Ni(II) ion from aqueous solution.

中文翻译：

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稻壳灰中的硅邻苯二胺对镍（II）的吸收

从稻壳灰和衍生的二氧化硅-邻苯二胺（RHAOPDA）ø -苯二胺（OPDA）的合成。所制备的材料用不同的技术表征。合成材料的N _2-吸附-解吸测量表明，RHAOPDA的表面积为25.10 m ²  g ^-1，平均孔径为15.10 nm。CHNS和FT-IR分析证明Ò-苯二胺已成功并入改性二氧化硅RHACI中。X射线衍射技术显示RHAOPDA的无定形性质，在22°（2θ）处具有最大强度，而扫描电子显微镜（SEM）技术显示，颗粒形状类似于花椰菜的果实，平均粒径为22.62 nm。RHAOPDA的热重分析（TGA-DTA）表明，在（30–150）°C之间失去了物理吸附的水，这意味着它在二氧化硅-邻苯二胺中的结合力很弱，而材料的剩余部分分解到820°C C。RHAOPDA显示出从水溶液中吸收和去除Ni（II）离子的可能性很高。