There is an increasing trend of developing various low-cost biogenic sorbents for the efficient and economical removal of noxious metals . Curry leaf powder (CLP), a promising non-toxic biosorbent containing several bioactive compounds was prepared by the pulverization of the dried leaves for the effective removal of Lead (Pb) and Cadmium (Cd). Various batch sorption experiments were carried out under constant temperature (25 °C), different pH (4.5–10.5), initial concentrations (50–200 mg L⁻¹), adsorbent dosages (0.10–0.40 g) and contact times (0–60 min) to understand the optimum experimental conditions and simultaneously evaluate the adsorption isotherms and removal kinetics of CLP. Adsorption equilibrium was established in less than an hour interval (50 min). The pseudo-equilibrium process was best described by the pseudo-second-order kinetic (R² ≥ 0.99), Freundlich and Langmuir isotherm model (R² ≥ 0.94). The removal rate of Pb and Cd gradually increased (15.7 and 12.7 mg g⁻¹ for Pb and Cd) at 100 mg L⁻¹ of initial concentration till 60 min of contact period in a single contaminant system, the effect was non-significant for multiple adsorbent dosage systems (p > 0.05; t-test) though. The regeneration potential of the exhausted biosorbent was excellent upto 5 cycles with the better efficiency observed for Pb. The obtained results explicitly validated the probable utilization of CLP as a promising green adsorbent for metal removal . Future study may highlight the decontamination aspects of emerging contaminants with such green bio sorbents in large scale as well as mimicing the stomach conditions.

为了有效和经济地去除有毒金属，开发各种低成本的生物吸附剂的趋势正在增加。咖喱粉（CLP）是一种有前景的无毒生物吸附剂，它包含几种生物活性化合物，可通过将干叶粉碎而制备，以有效去除铅（Pb）和镉（Cd）。在恒温（25°C），不同的pH（4.5-10.5），初始浓度（50-200 mg L ^-1）下进行了各种批量吸附实验），吸附剂量（0.10–0.40 g）和接触时间（0–60分钟）以了解最佳实验条件，同时评估CLP的吸附等温线和去除动力学。在不到一个小时的间隔（50分钟）内建立了吸附平衡。伪平衡过程最好由伪二级动力学（R描述²  ≥0.99），Freundlich和Langmuir等温模型（R ²  ≥0.94）。在单一污染物系统中，直到初始接触浓度为60 mg L ^-1时，Pb和Cd的去除率逐渐提高（Pb和Cd的去除率分别为15.7和12.7 mg g ^-1），直到接触时间60分钟为止，对于多种吸附剂剂量系统（p> 0.05; t-测试）。耗尽的生物吸附剂的再生潜能高达5个循环，而且Pb的效率更高。获得的结果明确证明了CLP可能被用作金属去除的有前途的绿色吸附剂。未来的研究可能会着重于用这种绿色生物吸附剂净化新出现的污染物的净化方面，并模仿胃的状况。