The excessive phosphate (P(V)) removal is a key factor to control the eutrophication. The ligand based composite adsorbent was fabricated from the stand point of ion-exchange adsorption, eletroselectivity and hydrogen bonding mechanism. The mesoporous silica and ligand embedded composite adsorbent were characterized to understand ordered porosity in the frameworks. The composite adsorbent was protonated before going to start the adsorption by using 2.0 M HCl. In this work, the competitive adsorption of the similar chemical properties and ionic radii of arsenic and phosphate was also evaluated. The adsorbent was exhibited rapid adsorption, significant selectivity and high adsorption capacity. Remarkably, this adsorbent demonstrated the adsorption in low pH area; however, the neutral pH 7.0 was selected to expel the competing ions. The adsorption process was fitted to the Langmuir model, confirming the monolayer coverage and the maximum adsorption capacity were also as high as 159.13 mg/g. The adsorbent clarified the specific selectivity towards the P(V) over the highly competed anions of Cl^-, HCO₃^-, and SO₄^2- according to the strong hydrogen bonding interactions between the divalent HPO₄^2- and the protonated composite adsorbent of NH₃⁺ groups at pH 7.0. Apart from the remarkable P(V) adsorption in terms of high adsorption and immense selectivity, the composite adsorbent was found to be environmental friendly based on the elution process. The adsorbent possessed high reusability in terms of several matrices treatments during the adsorption-elution-reuses cycles. The eluent was selected of the 2.0 M HCl from the consideration of regeneration to the protonated form rather than using NaOH. Therefore, the proposed composite adsorbent was found to be an ideal candidate for P(V) removal in the contaminated wastewater.

过量去除磷酸盐（P（V））是控制富营养化的关键因素。从离子交换吸附，电选择性和氢键机理的角度出发，制备了基于配体的复合吸附剂。对介孔二氧化硅和配体嵌入的复合吸附剂进行了表征，以了解骨架中的有序孔隙率。在使用2.0 M HCl开始吸附之前，先对复合吸附剂进行质子化处理。在这项工作中，还评估了砷和磷酸盐的相似化学性质和离子半径的竞争性吸附。该吸附剂表现出快速吸附，显着的选择性和高吸附容量。值得注意的是，这种吸附剂显示出在低pH值区域的吸附。但是，选择中性pH 7.0排出竞争离子。吸附过程符合Langmuir模型，证实了单层覆盖率和最大吸附容量也高达159.13 mg / g。吸附剂阐明了对竞争激烈的Cl阴离子对P（V）的比选择性^-，HCO ₃ ^-和SO ₄ ^2-，根据二价HPO之间的强氢键相互作用₄ ^2-和NH的质子化的复合吸附剂₃ ⁺在pH 7.0下的基团。除了在高吸附和巨大选择性方面具有显着的P（V）吸附能力外，基于洗脱过程，发现复合吸附剂对环境友好。就在吸附-洗脱-再利用循环中的几种基质处理而言，吸附剂具有很高的可重复使用性。考虑到再生为质子化形式而不是使用NaOH，从2.0 M HCl中选择洗脱液。因此，发现拟议的复合吸附剂是去除污水中P（V）的理想选择。