In the present investigation we described a facile method to synthesize nano-silver supported activated carbon from renewable bio-resource and its eco-friendly promising role to purify pharmaceutical contaminated wastewaters. The adsorption characteristics of Naproxen (NAP) on Ag supported activated carbon (AAC) have been studied under varied environments. The developed adsorbent, AAC have been characterized by UV-Visible, FT-IR, SEM-EDXA, XRD, TEM and SAED. UV-Vis and TEM confirmed production of Ag NPs (average size of 15 ± 3 nm) on activated carbon surface. Further, XRD analysis authenticates the presence of pure face centered cubic (fcc) structure of silver nanoparticles formed on activated carbon surface. Various operational parameters, such as pH, adsorbent dose and contact time were optimized for the removal of NAP from water phase. The pseudo-second-order kinetic model was found to follow the adsorption phenomenon (with good correlation coefficient). The Langmuir isotherm well describes the experimental data and maximum monolayer adsorption capacity was 200 mg/g for AAC. The pH and optimal temperature for adsorption process are found to be 4.0 and 303 K, respectively. The rate of adsorption is remarkably fast at the beginning and achieves equilibrium in 120 min. The obtained results showed that AAC was a better substitute as composite materials for remediation of wastewater.

中文翻译：

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纳米银负载生物基活性炭复合材料在水中萘普生螯合中的应用

在本研究中，我们描述了一种从可再生生物资源中合成纳米银负载的活性炭的简便方法，及其在净化制药污染废水方面的生态友好作用。研究了萘普生（NAP）在载银活性炭（AAC）上的吸附特性。所开发的吸附剂AAC的特征在于紫外可见光，FT-IR，SEM-EDXA，XRD，TEM和SAED。UV-Vis和TEM证实在活性炭表面上会生成Ag NP（平均大小为15±3 nm）。此外，XRD分析验证了活性炭表面上形成的银纳米颗粒的纯面心立方（fcc）结构的存在。优化了各种操作参数，例如pH，吸附剂剂量和接触时间，以从水相中去除NAP。发现伪二级动力学模型遵循吸附现象（具有良好的相关系数）。Langmuir等温线很好地描述了实验数据，AAC的最大单层吸附容量为200 mg / g。发现用于吸附过程的pH和最佳温度分别为4.0和303K。吸附速率在开始时非常快，并在120分钟内达到平衡。所得结果表明，AAC可以更好地替代复合材料来修复废水。发现用于吸附过程的pH和最佳温度分别为4.0和303K。吸附速率在开始时非常快，并在120分钟内达到平衡。所得结果表明，AAC可以作为废水处理的复合材料更好的替代品。发现用于吸附过程的pH和最佳温度分别为4.0和303K。吸附速率在开始时非常快，并在120分钟内达到平衡。所得结果表明，AAC可以作为废水处理的复合材料更好的替代品。