Iron sulfide (FeS) nanoparticles (termed FSNs) have attracted much attention for the removal of pollutants due to their high efficiency and low cost, and because they are environmentally friendly. However, issues of agglomeration, transformation, and the loss of active components limit their application. Therefore, this study investigates in situ synthesized FeS/carbon fibers with an Fecarrageenan biomass as a precursor and nontoxic sulfur source to ascertain the removal efficiency of the fibers. The enrichment of sulfate groups as well as the double-helix structure in ι-carrageenan-Fe could effectively avoid the aggregation and loss of FSNs in practical applications. The obtained FeS/ carbon fibers were used to control a Cr(VI) polluted solution, and exhibited a relatively high removal capacity (81.62 mg/g). The main mechanisms included the reduction of FeS, electrostatic adsorption of carbon fibers, and Cr(III)-Fe(III) complexation reaction. The pseudo-second-order kinetic model and Langmuir adsorption model both provided a good fit of the reaction process; hence, the removal process was mainly controlled by chemical adsorption, specifically monolayer adsorption on a uniform surface. Furthermore, co-existing anions, column, and regeneration experiments indicated that the FeS/ carbon fibers are a promising remediation material for practical application.

硫化铁（FeS）纳米颗粒（称为FSN）因其高效，低成本以及对环境友好而受到了广泛的关注，用于去除污染物。然而，结块，转化和活性成分损失的问题限制了它们的应用。因此，本研究调查了以角叉菜胶生物质为前体和无毒硫源的原位合成FeS /碳纤维，以确定纤维的去除效率。在1-角叉菜胶-Fe中硫酸盐基团的富集以及双螺旋结构可有效避免FSN在实际应用中的聚集和损失。获得的FeS /碳纤维用于控制Cr（VI）污染溶液，并显示出较高的去除能力（81.62 mg / g）。主要机理包括FeS的还原，碳纤维的静电吸附以及Cr（III）-Fe（III）络合反应。拟二级动力学模型和Langmuir吸附模型都很好地拟合了反应过程。因此，去除过程主要是通过化学吸附，特别是在均匀表面上的单层吸附来控制的。此外，共存的阴离子，色谱柱和再生实验表明，FeS /碳纤维是一种有希望的实际应用修复材料。特别是在均匀表面上的单层吸附。此外，共存的阴离子，色谱柱和再生实验表明，FeS /碳纤维是一种有希望的实际应用修复材料。特别是在均匀表面上的单层吸附。此外，共存的阴离子，色谱柱和再生实验表明，FeS /碳纤维是一种有希望的实际应用修复材料。