In this work was studied the single-component and multi-component abatement of metals in water using a hydrogel based on chitosan. The maximum single-component abatement capacities of cadmium (Cd) and lead (Pb) were 234.84 and 482.83 mg of metal per g of dried hydrogel at pH 6 and 40 °C, according to the Sips isotherm. The value for iron (Fe) was 386.59 mg g⁻¹ at pH 4 and 40 °C, according to the Langmuir isotherm. The best kinetic fits were determined using the pseudo-second-order model, whereas the thermodynamic parameters inferred spontaneous, favorable abatement phenomena. Lower abatement capacities were determined for multi-component studies due to the hydrated ionic radius and electronegativity of the metals. The abatement processes were confirmed by scanning electron microscopy coupled to energy-dispersive X-ray spectroscopy and Fourier-transform infrared spectra, indicating reversible chemical interactions between the hydrogel binding groups and Cd, Pb, and Fe. Such hydrogel proved to be a potential functional biopolymer for the treatment of water and wastewater contaminated by heavy metals.

在这项工作中，研究了使用基于壳聚糖的水凝胶对水中金属的单组分和多组分消除方法。根据Sips等温线，每克干燥的水凝胶中镉（Cd）和铅（Pb）的最大单组分减排能力为234.84和482.83 mg金属。铁（Fe）值为386.59 mg g ^-1根据Langmuir等温线，在pH 4和40°C下的温度。使用拟二阶模型确定了最佳的动力学拟合，而热力学参数则推断出自发的，有利的减排现象。由于金属的水合离子半径和电负性，确定了用于多组分研究的较低减排能力。消除过程通过扫描电子显微镜与能量色散X射线光谱法和傅立叶变换红外光谱耦合确定，表明水凝胶结合基团与Cd，Pb和Fe之间存在可逆的化学相互作用。这种水凝胶被证明是潜在的功能性生物聚合物，用于处理被重金属污染的水和废水。