This paper aims to assess the potential of the composted sugarcane pressmud, as a reactive material for lead and zinc, comparing its adsorption, desorption, bioaccessibility, and cost/efficiency with more traditionally studied low-cost adsorbents for potentially toxic metals. For this, sugarcane pressmud, peat, zeolite clinoptilolite, and zeolite clinoptilolite enrichment with sodium were investigated. All materials were capable of removing lead and zinc in high concentrations, and the removals are dependent on the initial concentration. Both clinoptilolites were considered the most efficient for lead, followed by sugarcane pressmud. Regarding zinc, sugarcane pressmud had the highest performance, reaching around 72% of removal at 240 mg L⁻¹. The pseudo-second-order kinetic model is satisfactorily suited to adsorption for all materials. Sugarcane pressmud attained the equilibrium faster than others (within 60 min), and it was considered the cheapest one (0.01 and 0.04 U$ for gram of lead and zinc removed). Langmuir described a monolayer sorption capacity (of 8.7738 mg g⁻¹) of zinc onto sugarcane pressmud. In desorption and bioaccessibility assays, all the materials are capable of maintaining both potentially toxic metals at the binding sites, although most of the elements adsorbed in organic materials (sugarcane pressmud and peat) are in their bioaccessible form (above about 80%), requiring proper usage planning, and correctly handled. Thus, the results demonstrate that sugarcane pressmud (an abundant and inexpensive agro-waste material) may be a promising alternative as a reactive material for remediation in contaminated mining areas by lead and zinc.

本文旨在评估堆肥甘蔗压泥作为铅和锌的反应材料的潜力，将其吸附、解吸、生物可及性和成本/效率与更传统的研究低成本吸附剂的潜在有毒金属进行比较。为此，研究了甘蔗压泥、泥炭、沸石斜发沸石和含钠的沸石斜发沸石富集。所有材料都能够去除高浓度的铅和锌，去除量取决于初始浓度。两种斜发沸石都被认为对铅最有效，其次是甘蔗压泥。关于锌，甘蔗压泥具有最高的性能，在 240 mg L ^{-1 时}达到约 72% 的去除率. 准二级动力学模型非常适合所有材料的吸附。甘蔗压泥比其他压泥更快地达到平衡（在 60 分钟内），它被认为是最便宜的（去除 0.01 和 0.04 克铅锌）。Langmuir 描述了单层吸附容量（8.7738 mg g ^-1) 锌到甘蔗压榨泥上。在解吸和生物可及性分析中，所有材料都能够在结合位点保留两种潜在的有毒金属，尽管大多数吸附在有机材料（甘蔗压泥和泥炭）中的元素处于其生物可及性形式（约 80% 以上），需要正确的使用计划，并正确处理。因此，结果表明，甘蔗压泥（一种丰富且廉价的农业废弃物材料）可能是一种很有前途的替代品，作为一种反应性材料，可用于修复铅和锌污染的矿区。