Cassia fistula seeds has been utilized for the abstraction of Pb(II) ions from the aqueous environment. Raw Cassia fistula seeds (RCF) and three different surface modified (physically treated – PMCF and chemically treated – HMCF and SMCF) adsorbent material were taken for investigation. The adsorption properties of these materials and their contact amongst the Pb(II) ion and sorbent materials were characterized by FTIR and SEM analysis. The parameters influencing the adsorption capacity of varied adsorbents were evaluated: maximum solution pH for Pb(II) is 5.0; interactive time is 30 min; dosage is 8.0 g/L for RCF, 4.0 g/L for HMCF, 2.5 g/L for PMCF and 1.0 g/L for SMCF. The modelling study reveals that Freundlich isotherm and Pseudo first order kinetics fits well and the utmost adsorption measurements for the varied adsorbents were found to be 13.22, 28.28, 48.66 and 129.3 mg/g, respectively.

决明子瘘种子已被用于从水环境中提取 Pb(II) 离子。生肉桂瘘种子 (RCF) 和三种不同的表面改性（物理处理 - PMCF 和化学处理 - HMCF 和 SMCF）吸附材料进行研究。这些材料的吸附特性及其与 Pb(II) 离子和吸附剂材料的接触通过 FTIR 和 SEM 分析进行表征。评估了影响不同吸附剂吸附能力的参数：Pb(II) 的最大溶液 pH 值为 5.0；互动时间为30分钟；RCF 的用量为 8.0 g/L，HMCF 为 4.0 g/L，PMCF 为 2.5 g/L，SMCF 为 1.0 g/L。模型研究表明，Freundlich 等温线和伪一级动力学拟合良好，并且发现各种吸附剂的最大吸附测量值分别为 13.22、28.28、48.66 和 129.3 mg/g。