In the current study, a highly efficient and cost-effective zeolite derived from fly ash was used for immobilization of cadmium (Cd) in sediment of a pond. The potential of fly ash based zeolite (FABZ) was explored by in-situ amendment practice, including a study plan based on sediment-water microcosm study. The zeolite obtained after acid washing step (fly ash: acid, 1:10 g/mL) followed by the alkali fusion showed the high value of cation exchange capacity (CEC, 13.88 meq/g). The maximum monolayer uptake capacity was found as 145.931 mg/g, indicating the usefulness of FABZ in Cd enriched environment. The sediment treated with 10% FABZ showed remarkable decrease in Cd concentration (about 80%) as compared to the control (0% FABZ). The results of the sequential extraction in exchangeable fraction revealed that Cd level was decreased by 90.72% (10% FABZ) as compared to untreated one, hence successfully decreased the bioavailable Cd. Furthermore, in the muscles of Lymnaea succinea, Cd concentration of 0.87 mg/kg was observed (10% FABZ), which was found six times less than the mollusc of 0% FABZ treated sediment. Thus, prepared FABZ showed its potential to immobilize Cd from sediment and can be used as an economical and feasible method for sediment management at pilot scale.

在当前的研究中，一种由粉煤灰衍生的高效且具有成本效益的沸石被用于固定池塘沉积物中的镉（Cd）。通过原位探索粉煤灰基沸石（FABZ）的潜力修正实践，包括基于沉积物水微观世界的研究计划。酸洗步骤后得到的沸石（粉煤灰：酸，1:10 g / mL），然后进行碱熔，显示出较高的阳离子交换容量（CEC，13.88 meq / g）。发现最大单层吸收能力为145.931 mg / g，表明FABZ在富Cd环境中的有用性。与对照（0％FABZ）相比，用10％FABZ处理的沉积物的Cd浓度显着降低（约80％）。可交换馏分中顺序提取的结果表明，与未处理的镉相比，镉的含量降低了90.72％（10％FABZ），因此成功地降低了生物利用率的镉。此外，在Lymnaea succinea的肌肉中，观测到的镉浓度为0.87 mg / kg（10％FABZ），发现其含量比0％FABZ处理过的沉积物的分子含量低六倍。因此，制备的FABZ表现出了将Cd从沉积物中固定的潜力，可作为中试规模的沉积物管理的经济可行方法。