Hexavalent chromium [Cr(VI)] is highly water soluble and its compounds act as strong oxidizing agent that easily react with human organs and lead to various carcinogenic diseases. Cr(VI) removal is very important to provide safe drinking water. Hence, this research work targets Cr(VI) removal using a sustainable material namely triazine-assisted micro-porous covalent organic polymer enfolded alginate biocomposite beads (TCOP@Alg) synthesized by hydrothermal method. To determine the physicochemical properties of TCOP@Alg biocomposite beads, FTIR, PXRD, SEM, XPS, EDAX, BET and mapping analyses were scrutinized. The surface area of TCOP@Alg biocomposite beads was found to be 292 m² g⁻¹, showing an excellent sorption capacity (SC) of 42.89 mg g⁻¹. The sorption data of Cr(VI) removal onto TCOP@Alg biocomposite beads is well correlated with various isotherms and kinetic models. The thermodynamic equilibrium values indicated that Cr(VI) sorption onto TCOP@Alg biocomposite beads was endothermic and spontaneous. In addition, TCOP@Alg hybrid biocomposite beads can be efficiently regenerated up to three cycles using 0.1 M NaOH. TCOP@Alg biocomposite beads can be employed as potential sorbent for Cr(VI) removal from Cr(VI) contaminated ground water.

中文翻译：

---

水热法制备三嗪官能化的共价有机聚合物包裹藻酸盐生物复合材料珠以去除水中的Cr（VI）

六价铬[Cr（VI）]高度水溶性，其化合物充当强氧化剂，容易与人体器官反应并导致多种致癌疾病。铬（VI）的去除是非常重要的，以提供安全的饮用水。因此，这项研究工作的目标是使用一种可持续的材料，即通过水热法合成的三嗪辅助微孔共价有机聚合物包裹藻酸盐生物复合材料微珠（TCOP @ Alg）来去除Cr（VI）。为了确定TCOP @ Alg生物复合材料珠的理化性质，对FTIR，PXRD，SEM，XPS，EDAX，BET和作图分析进行了仔细检查。发现TCOP @ Alg生物复合材料珠的表面积为292 m ² g ^-1，显示出42.89 mg g ^-1的出色吸附能力（SC）。在TCOP @ Alg生物复合材料微珠上去除Cr（VI）的吸附数据与各种等温线和动力学模型密切相关。热力学平衡值表明，Cr（VI）在TCOP @ Alg生物复合材料微珠上的吸附是吸热的和自发的。此外，使用0.1 M NaOH可以有效地再生TCOP @ Alg杂化生物复合材料珠粒，最多三个循环。TCOP @ ALG生物复合珠可以用作潜在的吸附剂对Cr（VI）选自Cr（除去VI）污染的地下水。