Pomelo peel has been reported as an efficient biosorbent for lead removal from wastewater treatment processes. The current work aimed to examine the amounts of lead desorption from the biosorbent waste in amended soil samples for up to 3 months (10% w/w). The desorption experiments were performed under two widely used techniques, single extraction and column leaching. Lead desorption was evaluated using two common eluents, which were 0.01-M Ca(NO₃)₂ and 0.04-M EDTA solutions. Under the single extraction method, using Ca(NO₃)₂, the highest amounts of Pb desorption were observed at 1 month (18.0 to 33.7% of total soil Pb), followed by a decrease attributed to re-adsorption of Pb released from the pomelo waste onto the soil. Much higher percentages of the soil Pb were desorbed using the EDTA solution throughout the period of the experiment (83.5 to 110.4% of total soil Pb). Soil pH appeared to have no effect on Pb desorption at this stage. The results from the column leaching study were similar although much smaller amounts of Pb were desorbed. Sequential fractionation data indicated that the bulk of the Pb released from the pomelo waste ended up associated with the soil oxide fraction with lesser amounts associated with the soil carbonate fraction. The results of this study suggest that land disposal of lead-contaminated biowastes such as pomelo peel could release Pb by desorption into the environment. Such material should therefore be treated as Solid waste should be treated as hazardous waste and only be disposed of in safe environmentally friendly ways.

据报道，柚皮是一种有效的生物吸附剂，可用于从废水处理过程中去除铅。目前的工作旨在检查长达 3 个月的改良土壤样品中生物吸附废物中铅的解吸量（10% w/w）。解吸实验在两种广泛使用的技术下进行，即单次萃取和柱浸。使用两种常见的洗脱液（0.01-M Ca(NO ₃ ) ₂和 0.04-M EDTA 溶液）评估铅解吸。在单一萃取法下，使用Ca(NO ₃ ) ₂，在 1 个月时观察到最高的 Pb 解吸量（占土壤总 Pb 的 18.0% 至 33.7%），随后由于从柚子废物释放到土壤上的 Pb 重新吸附而减少。在整个实验期间，使用 EDTA 溶液解吸了更高百分比的土壤铅（占土壤总铅的 83.5% 至 110.4%）。在此阶段，土壤 pH 值似乎对 Pb 解吸没有影响。柱浸出研究的结果是相似的，尽管解吸的 Pb 量要少得多。连续分馏数据表明，从柚子废物中释放的大部分 Pb 最终与土壤氧化物部分相关，而较少量与土壤碳酸盐部分相关。这项研究的结果表明，柚皮等铅污染生物废物的土地处置可能会通过解吸将铅释放到环境中。因此，此类材料应作为固体废物处理，应作为危险废物处理，并且只能以安全、环保的方式进行处置。