Acid Blue 113 removal from aqueous solution using novel biosorbent based on NaOH treated and surfactant modified fallen leaves of Prunus Dulcis
Acid Blue 113 removal from aqueous solution using novel biosorbent based on NaOH treated and surfactant modified fallen leaves of Prunus Dulcis
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DOI：
10.1016/j.jece.2017.06.047
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发表时间：
2017-08-01
影响因子：
7.7
通讯作者：
Gogate, Parag R.
中科院分区：
文献类型：
--
作者：
Jain, Suyog N.;Gogate, Parag R.
以扁桃叶为原料，采用NaOH活化和表面活性剂处理，制备了生物吸附剂。利用傅里叶变换红外光谱、扫描电镜、元素分析和布鲁诺尔-埃米特-泰勒分析技术对生物吸附剂进行了表征。获得的生物吸附剂随后用于去除水溶液中的偶氮染料酸性蓝113。以批处理的方式考察了生物吸附剂用量、接触时间、初始染料浓度、盐浓度和温度对AB 113吸附程度的影响。结果表明：NaOH处理的生物吸附剂用量为10 g L-1，表面活性剂改性的生物吸附剂用量为3 g L-1，接触时间为2.5 h，温度为293 K。表面活性剂改性的生物吸附剂与氢氧化钠活化的生物吸附剂相比，获得了更好的效果（几乎100%去除）。吸附动力学数据可以用拟二阶方程很好地描述，而Langmuir和Temkin等温线模型最适合于得到的平衡数据。结果表明，吸附是自发的、放热的。在优化条件下，常规制备的生物吸附剂、氢氧化钠处理的生物吸附剂和表面活性剂改性的生物吸附剂的最大吸附量分别为10.87、25.51和97.09 mg g（-1）。再生研究和随后的应用证明了生物吸附剂在一个以上循环中去除染料的潜力。本研究最终确定了表面活性剂改性生物吸附剂对酸性蓝113染料的有效去除潜力，其生物吸附量为97.09 mg g(-1)，显著高于其他常用吸附剂。
In the present work, the fallen leaves of Prunus Dulcis (almond) have been used for obtaining biosorbent with activation based on NaOH and surfactant treatment. Characterization of biosorbent was performed using Fourier transform infrared spectroscopy, scanning electron microscopy, elemental analysis and Brunauer-Emmett-Teller analysis techniques. The obtained biosorbent was subsequently applied for removal of azo dye, Acid Blue 113, from aqueous solution. The effects of biosorbent dose, contact time, initial dye concentration, salt concentration and temperature on the extent of adsorption of AB 113 were investigated in batch mode. The optimum conditions obtained for maximum dye removal were biosorbent dose of 10 g L-1 for NaOH treated biosorbent and 3 g L-1 for surfactant modified biosorbent, contact time of 2.5 h and temperature of 293 K. Better results were obtained for surfactant modified biosorbent (almost 100% removal) as compared to the NaOH activated biosorbent. The adsorption kinetics data were found to be well described by pseudo-second order equation whereas Langmuir and Temkin isotherm models were observed to be best fitted to the obtained equilibrium data. The adsorption was found to be exothermic and spontaneous in nature. Maximum biosorption capacity obtained under optimized conditions were 10.87, 25.51 and 97.09 mg g(-1) for conventionally obtained biosorbent, NaOH treated biosorbent and surfactant modified biosorbent respectively. Regeneration studies and subsequent application demonstrated potential of the biosorbent for dye removal in more than one cycle. The present study conclusively established the potential of surfactant modified biosorbent for effective removal of Acid Blue 113 dye with significantly higher biosorption capacity of 97.09 mg g(-1) in comparison with other commonly used adsorbents.