Lead (Pb) is one of the greatly toxic heavy metals that can enter into the biological system through food chain and induce serious health impairments. Lead ion (Pb (II)) can be released in the environment through natural and anthropogenic sources. Among different types of remediation techniques, adsorption is one of the most well-accepted techniques due to its economic feasibility and versatility as well. Herein, the removal of Pb (II) was examined using chitosan-activated carbon-polyvinyl alcohol (CS-AC-PVA) composite beads. Results demonstrated that CS-AC-PVA composite beads have more potential to adsorb Pb (II) from the aqueous solution than lone chitosan (CS), activated carbon (AC), and chitosan-activated carbon composite beads. Moreover, CS-AC-PVA composite beads showed 44% more adsorbent capacity than CA-AC beads. The adsorption capacity of CS-AC-PVA composite beads for Pb (II) showed highest adsorption at 25 °C which is increased with increasing concentrations and decrease with increasing temperature. The equilibrium data is well described by Freundlich isotherm labeling chemical interaction via multiple adsorption sites. Thus, this hybrid CS-AC-PVA composite bead is proven as potential adsorbent for environmental remediation for Pb (II) from the aqueous solution.

铅（Pb）是一种毒性极大的重金属，可以通过食物链进入生物系统，对健康造成严重损害。铅离子（Pb (II)）可以通过自然和人为来源释放到环境中。在不同类型的修复技术中，吸附是最广为接受的技术之一，因为它具有经济可行性和多功能性。在此，使用壳聚糖-活性炭-聚乙烯醇 (CS-AC-PVA) 复合珠检测 Pb (II) 的去除。结果表明，与单独的壳聚糖 (CS)、活性炭 (AC) 和壳聚糖-活性炭复合珠相比，CS-AC-PVA 复合珠从水溶液中吸附 Pb (II) 的潜力更大。此外，CS-AC-PVA 复合珠的吸附能力比 CA-AC 珠高 44%。CS-AC-PVA 复合珠对 Pb (II) 的吸附能力在 25 °C 时表现出最高的吸附能力，随着浓度的增加而增加，随着温度的升高而降低。Freundlich 等温线通过多个吸附位点标记化学相互作用很好地描述了平衡数据。因此，这种混合 CS-AC-PVA 复合珠被证明是潜在的吸附剂，可用于环境修复水溶液中的 Pb (II)。