Sairam Sundaram C, Meenakshi S
Department of Science and Humanities, Karaikal Polytechnic College, Karaikal 609 609, Puducherry, India.
J Colloid Interface Sci. 2009 May 1;333(1):58-62. doi: 10.1016/j.jcis.2009.01.022. Epub 2009 Jan 15.
Research in defluoridation of drinking water has thrown more technologies, with adsorption as more popular alternative among the fluoride endemic habitations across the globe. This paper describes the fluoride removal potential of novel sorbent, synthetic hybrid type ion exchangers from drinking water. Synthesized hybrids were characterized using FTIR studies. Batch adsorption studies were performed as a function of contact time, pH and influence of other interfering anions. The values of defluoridation capacities (DCs) of synthesized polyacrylamide Al(III) phosphate (Al-Ex), polyacrylamide Ce(IV) phosphate (Ce-Ex) and polyacrylamide Zr(IV) phosphate (Zr-Ex) were found to be 2144, 2290 and 2166 mg F(-)/kg, respectively. Ce-Ex has slightly higher DC than Al-Ex and Zr-Ex. The equilibrium data were fitted with isotherm models. Thermodynamic parameters viz., DeltaG(o), DeltaH(o) and DeltaS(o) were calculated to understand the nature of sorption. Field studies were carried out to find the suitability of these sorbents at field condition.
饮用水除氟研究涌现出了更多技术，其中吸附法是全球氟病区更受欢迎的替代方法。本文描述了新型吸附剂——合成杂化型离子交换剂对饮用水中氟的去除潜力。利用傅里叶变换红外光谱（FTIR）研究对合成的杂化物进行了表征。进行了批量吸附研究，考察了接触时间、pH值以及其他干扰阴离子的影响。合成的聚丙烯酰胺磷酸铝（Al-Ex）、聚丙烯酰胺磷酸铈（Ce-Ex）和聚丙烯酰胺磷酸锆（Zr-Ex）的除氟容量（DC）值分别为2144、2290和2166 mg F(-)/kg。Ce-Ex的DC略高于Al-Ex和Zr-Ex。平衡数据用等温线模型进行拟合。计算了热力学参数，即ΔG(o)、ΔH(o)和ΔS(o)，以了解吸附的性质。开展了现场研究，以确定这些吸附剂在现场条件下的适用性。
