In the present study, chitosan functionalized mesoporous silica nanoparticles have been synthesized. Chitosan derived from an edible mushroom, Agaricus bisporus was used during synthesis of chitosan functionalized silica nanoparticles. The functionalized silica nanoparticles were subjected to fluoride sorption using a batch method which subsequently showed removal efficiency of 95% with maximum sorption capacity, 58.8 mg/g. The characterization of nanoparticles was carried out by SEM, EDAX, XRD and FTIR analysis respectively. EDAX analysis suggested that oxygen, 51.83% and silica 37.24% was main constituent of the functionalized nanomaterials. XRD yielded characteristic diffraction pattern corresponding to the lattice planes (100), (110), (112), (120), (200) and (220) respectively. Sorption data was used to study equilibrium isotherm namely Langmuir and Freundlich model. The adsorption capacity increased with temperature while kinetics studies revealed that the adsorption process followed a pseudo-second-order rate equation. The enthalpy change (ΔH) and entropy change (ΔS) was found to be −31.36 kJmol⁻¹ and −7.75 Jmol⁻¹ K⁻¹, showing endothermic and spontaneous nature of the fluoride adsorption. Data suggested that the nature of adsorption belonged to chemisorptions. The overall results suggested that the synthesized nanoparticles showed strong and specific affinity for fluoride and could be excellent adsorbents for defluoridation.

在本研究中，已合成了壳聚糖功能化的介孔二氧化硅纳米粒子。源自食用蘑菇双孢蘑菇的壳聚糖在壳聚糖官能化的二氧化硅纳米粒子的合成过程中使用了“纳米粒子”。使用分批方法对官能化的二氧化硅纳米颗粒进行氟化物吸附，其随后显示去除效率为95％，最大吸附容量为58.8 mg / g。纳米粒子的表征分别通过SEM，EDAX，XRD和FTIR分析进行。EDAX分析表明氧为51.83％，二氧化硅为37.24％是功能化纳米材料的主要成分。XRD产生分别对应于晶格平面（100），（110），（112），（120），（200）和（220）的特征衍射图。吸附数据用于研究平衡等温线，即Langmuir和Freundlich模型。吸附容量随温度增加而增加，而动力学研究表明，吸附过程遵循伪二级速率方程。发现焓变（ΔH）和熵变（ΔS）为-31.36 kJmol^-1和-7.75 Jmol ^-1 K ^-1，显示出氟化物吸附的吸热和自发性质。数据表明吸附的性质属于化学吸附。总体结果表明，合成的纳米颗粒对氟化物表现出强的和特异性的亲和力，并且可能是优异的脱氟吸附剂。