金合欢锯屑生物炭对 S-甲草胺的吸附特性。

IF 1.4 4区 农林科学 Q4 ENVIRONMENTAL SCIENCES Journal of Environmental Science and Health Part B-pesticides Food Contaminants and Agricultural Wastes Pub Date : 2024-01-01 Epub Date: 2024-03-04 DOI:10.1080/03601234.2024.2322767
Quach An Binh, Tran Van Khanh, Xuan Thanh Bui, Khanh Nguyen Di, Duy Toan Pham
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引用次数: 0

摘要

研究了从金合欢(Acacia auriculiformis)中提取的锯末生物炭(SAB)对水溶液中 S-甲草胺的吸附机理。SAB 在限氧条件下于 500 °C 下制造 4 小时,并对其进行了 SEM、EDS、pHpzc、BET 和 FTIR 表征。进一步探讨了 S-Metolachlor 和 SAB 的吸附动力学、等温线和扩散研究。此外,还研究了溶液 pH 值对 SAB 吸附 S-Metolachlor 的影响。SAB 的 BET 分析值为 106.74 m2.g-1,而溶液的 pH 值对 S-Metolachlor 的吸附没有显著影响。吸附数据被拟合为 Langmuir 等温线和 PSO 模型。确定了液膜扩散系数 Df(4.93 × 10-11 至 8.17 × 10-11 m2.s-1)和微粒扩散系数 Dp(1.68 × 10-11 至 2.65 × 10-11 m2.s-1),S-甲草胺吸附和 SAB 的限速步骤受液膜扩散控制。Setolachlor 在 SAB 上的吸附过程受多种机制控制,包括孔隙填充、H 键、疏水作用和 π-π EDA 相互作用。H 键是吸附 S-Metolachlor 和 SAB 的主要相互作用。研究结果表明,用金合欢锯屑生产的生物炭具有有效吸附 S-Metolachlor 除草剂的特性。
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Adsorption characteristics of S-Metolachlor onto the sawdust biochar derived from Acacia auriculiformis.

The adsorption mechanism of S-Metolachlor in an aqueous solution by sawdust biochar derived from Acacia auriculiformis (SAB) was studied. SAB was manufactured at 500 °C for 4 h under oxygen-limited conditions and characterized for SEM, EDS, pHpzc, BET, and FTIR. The adsorption kinetics, isotherm, and diffusion studies of S-Metolachlor and SAB were further explored. Moreover, the effects of the solution pH were examined on the adsorption of S-Metolachlor by SAB. The BET analysis of SAB was achieved at 106.74 m2.g-1 and the solution pH did not significantly influence the S-Metolachlor adsorption. The adsorption data were fitted into a Langmuir isotherm and the PSO model. The film diffusion coefficient Df (4.93 × 10-11 to 8.17 × 10-11 m2.s-1) and the particle diffusion coefficient Dp (1.68 × 10-11 to 2.65 × 10-11 m2.s-1) were determined and the rate-limiting step of S-Metolachlor adsorption and SAB was governed by liquid film diffusion. The S-Metolachlor adsorption process onto SAB was controlled by multiple mechanisms, including pore filling, H-bonding, hydrophobic interaction, and π-π EDA interactions. H-bonding is the main interaction for the adsorption of S-Metolachlor and SAB. Conclusively, the study illustrates that biochar produced from Acacia auriculiformis sawdust possessed effective adsorption properties for S-Metolachlor herbicide.

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CiteScore
4.00
自引率
5.00%
发文量
87
审稿时长
1 months
期刊介绍: 12 issues per year Abstracted/indexed in: Agricola; Analytical Abstracts; ASFA 3: Aquatic Pollution & Environmental Quality; BioSciences Information Service of Biological Abstracts (BIOSIS); CAB Abstracts; CAB AGBiotech News and Information; CAB Irrigation & Drainage Abstracts; CAB Soils & Fertilizers Abstracts; Chemical Abstracts Service Plus; CSA Aluminum Industry Abstracts; CSA ANTE: Abstracts in New Technology and Engineering; CSA ASFA 3 Aquatic Pollution and Environmental Quality; CSA ASSIA: Applied Social Sciences Index & Abstracts; CSA Ecology Abstracts; CSA Entomology Abstracts; CSA Environmental Engineering Abstracts; CSA Health & Safety Science Abstracts; CSA Pollution Abstracts; CSA Toxicology Abstracts; CSA Water Resource Abstracts; EBSCOhost Online Research Databases; Elsevier BIOBASE/Current Awareness in Biological Sciences; Elsevier Engineering Information: EMBASE/Excerpta Medica/ Engineering Index/COMPENDEX PLUS; Environment Abstracts; Environmental Knowledge; Food Science and Technology Abstracts; Geo Abstracts; Geobase; Food Science; Index Medicus/ MEDLINE; INIST-Pascal/ CNRS; NIOSHTIC; ISI BIOSIS Previews; Pesticides; Food Contaminants and Agricultural Wastes: Analytical Abstracts; Pollution Abstracts; PubSCIENCE; Reference Update; Research Alert; Science Citation Index Expanded (SCIE); and Water Resources Abstracts.
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