Eco-friendly sorbents for petroleum and diesel based on macadamia nutshell waste in castor oil-based polyurethane foam for oil spill

IF 3 4区工程技术 Q3 CHEMISTRY, PHYSICAL

Adsorption Pub Date : 2024-09-21 DOI:10.1007/s10450-024-00541-z

Lana S. Maia, Thalita da Silva Neto, Júlia Dornelas Perluxo, Flávia Lima do Carmo, Derval S. Rosa, Daniella R. Mulinari

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引用次数: 0

Abstract

Aquatic environments have faced significant and severe impacts in recent years due to oil spills and chemical leaks in oceanic and river ecosystems. Because of this, several studies have aimed to develop sustainable adsorbents with hydrophobic characteristics. This research focuses on creating eco-friendly sorbents using macadamia nutshell waste (MW) incorporated into castor oil-based polyurethane foam at different proportions (5, 10, 15, and 20 wt%). The study also evaluates the absorption efficiency of these sorbents for different oil types, including crude oils (crude oil CB, crude oil SB, diesel S10, and diesel S500). The eco-friendly sorbents (biocomposites) were characterized by optical microscopy, scanning electron microscopy, density, and contact angle analyses. Results revealed that the pore morphology of sorbents changed to a partial closed-cell structure with a smaller pore size. Additionally, the biocomposites exhibited a higher contact angle (119.1º ± 0.4) compared to pure polyurethane (PU). The oil absorption efficiency by biocomposites showed maximum sorption of 7.3, 7.1, 5.1, and 3.9 g.g⁻¹ for crude oils (SB and CB), S10, and S500 diesel, respectively. The absorption results showed that the biocomposites showed good removal of heavy oils (crude oil) compared to light oils (diesel S10 and S500). Among the isotherm models used, the Langmuir model demonstrated the most accurate fit and estimated a maximum adsorption capacity of 5.39, 4.23, 3.24, and 2.69 g.g⁻¹ for crude oil CB, crude oil SB, S10, and S500 diesel respectively, using PU + 20% MW. Additionally, PU + 20% MW showed excellent reusability during 30, 30, 30, and 10 cycles of sorption–desorption for crude oil CB, crude oil SB, S10, and S500 diesel, respectively.

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基于蓖麻油基聚氨酯泡沫中的澳洲坚果壳废料的石油和柴油环保型溢油吸附剂

近年来，由于海洋和河流生态系统中的石油泄漏和化学品泄露，水生环境面临着重大而严重的影响。因此，多项研究旨在开发具有疏水特性的可持续吸附剂。本研究的重点是利用澳洲坚果壳废料（MW）以不同的比例（5、10、15 和 20 wt%）加入蓖麻油基聚氨酯泡沫中，制造生态友好型吸附剂。研究还评估了这些吸油剂对不同油类的吸收效率，包括原油（原油 CB、原油 SB、柴油 S10 和柴油 S500）。通过光学显微镜、扫描电子显微镜、密度和接触角分析对环保吸附剂（生物复合材料）进行了表征。结果表明，吸附剂的孔隙形态变为部分闭孔结构，孔径变小。此外，与纯聚氨酯（PU）相比，生物复合材料表现出更高的接触角（119.1º ± 0.4）。生物复合材料的吸油效率显示，对原油（SB 和 CB）、S10 和 S500 柴油的最大吸附量分别为 7.3、7.1、5.1 和 3.9 g.g-1。吸收结果表明，与轻油（S10 和 S500 柴油）相比，生物复合材料对重油（原油）的去除效果较好。在所使用的等温线模型中，Langmuir 模型的拟合最为准确，使用 PU + 20% MW 对原油 CB、原油 SB、S10 和 S500 柴油的最大吸附容量分别为 5.39、4.23、3.24 和 2.69 g.g-1。此外，在对原油 CB、原油 SB、S10 和 S500 柴油分别进行 30、30、30 和 10 个循环的吸附-解吸过程中，聚氨酯 + 20% MW 显示出极佳的重复利用率。

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来源期刊

Adsorption 工程技术-工程：化工

CiteScore

8.10

自引率

3.00%

发文量

审稿时长

2.4 months

期刊介绍： The journal Adsorption provides authoritative information on adsorption and allied fields to scientists, engineers, and technologists throughout the world. The information takes the form of peer-reviewed articles, R&D notes, topical review papers, tutorial papers, book reviews, meeting announcements, and news. Coverage includes fundamental and practical aspects of adsorption: mathematics, thermodynamics, chemistry, and physics, as well as processes, applications, models engineering, and equipment design. Among the topics are Adsorbents: new materials, new synthesis techniques, characterization of structure and properties, and applications; Equilibria: novel theories or semi-empirical models, experimental data, and new measurement methods; Kinetics: new models, experimental data, and measurement methods. Processes: chemical, biochemical, environmental, and other applications, purification or bulk separation, fixed bed or moving bed systems, simulations, experiments, and design procedures.