Assessment of the use of tropical peats as local alternative materials for the adsorption of Pb, Zn and Cd: An equilibrium study

IF 0.7 4区地球科学 Q4 GEOSCIENCES, MULTIDISCIPLINARY

Earth Sciences Research Journal Pub Date : 2021-04-16 DOI:10.15446/ESRJ.V25N1.84276

I. Raimondi, V. Rodrigues, J. Z. Lima, J. P. Marques, L. A. A. Vaz, E. M. Vieira

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引用次数: 5

Abstract

How to cite item Raimondi, I. M., Silvestre-Rodrigues, V. G., Zanin-Lima, J., Pelinson-Marques, J., Artimonte-Vaz, L. A., & Vieira, E. M. (2021). Assessment of the use of tropical peats as local alternative materials for the adsorption of Pb, Zn and Cd: An equilibrium study. Earth Sciences Research Journal, 25(1), pending pages. DOI: https://doi.org/10.15446/esrj.v25n1.84276 Peat is an organic material that has been widely used as an efficient and low-cost adsorbent. As many studies tend to focus on temperate peats, there is a lack of knowledge about the adsorption mechanism of tropical peats. This paper investigates the use of two Brazilian peats (Cravinhos C and Luis Antônio LA) from the Mogi-Guaçu river basin for the adsorption of lead (Pb), zinc (Zn), and cadmium (Cd), in order to contribute to the use of local and easy access materials to remediate contaminated sites. The peats adsorbed a high percentage of cations, especially Pb cations (100.0-46.3%), with commercial peat C showing higher adsorption than peat LA. The removal order was Pb2+ > Cd2+ ≥ Zn2+ for C and Pb2+ > Zn2+ > Cd2+ for LA. The batch data for both peats and for all metals were better fit by the Langmuir isotherm, with adsorption capacities (qm) for Pb, Zn, and Cd of 37.3134, 29.0674 and 21.2890 mmol kg-1 in peat C and 21.7391, 14.2550 and 3.6460 mmol kg-1 in LA, respectively, values comparable to those of other peats and biosorbents. The studied peats are considered efficient, alternative and low-cost adsorptive materials for these metals. The proximity of peatlands to areas with high potential for contamination necessitates the use of local materials to reduce remediation costs. ABSTRACT Assessment of the use of tropical peats as local alternative materials for the adsorption of Pb, Zn and Cd: An equilibrium study

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利用热带泥炭作为当地替代材料吸附铅、锌和镉的评估：平衡研究

如何引用项目Raimondi，I.M.、Silvestre Rodrigues，V.G.、Zanin Lima，J.、Pelinson Marques，J.、Artimonte Vaz，L.A.和Vieira，E.M.（2021）。利用热带泥炭作为当地替代材料吸附铅、锌和镉的评估：一项平衡研究。《地球科学研究杂志》，25（1），待定页。DOI：https://doi.org/10.15446/esrj.v25n1.84276泥炭是一种有机材料，已被广泛用作高效和低成本的吸附剂。由于许多研究往往集中在温带泥炭上，因此对热带泥炭的吸附机制缺乏了解。本文调查了Mogi Guaçu河流域的两种巴西泥炭（Cravinhos C和Luis Antônio LA）对铅（Pb）、锌（Zn）和镉（Cd）的吸附作用，以有助于使用当地易于获得的材料来修复污染场地。泥炭吸附了高比例的阳离子，尤其是Pb阳离子（100.0-46.3%），商业泥炭C比泥炭LA表现出更高的吸附率。对C的去除顺序为Pb2+>Cd2+≥Zn2+，对LA的去除顺序是Pb2+>Zn2+>Cd2+.泥炭和所有金属的批次数据都更好地符合Langmuir等温线，对Pb、Zn和Cd的吸附容量（qm）为37.3134，泥炭C中分别为29.0674和21.2890 mmol kg-1，LA中分别为21.7391、14.2550和3.6460 mmol kg-1，与其他泥炭和生物吸附剂的值相当。所研究的泥炭被认为是这些金属的高效、替代和低成本吸附材料。泥炭地靠近污染可能性高的地区，因此需要使用当地材料来降低修复成本。利用热带泥炭作为当地替代材料吸附铅、锌和镉的评估：平衡研究

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来源期刊

Earth Sciences Research Journal 地学-地球科学综合

CiteScore

1.50

自引率

0.00%

发文量

审稿时长

>12 weeks

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