Carbon and nitrogen removal by Chlorella sp. and Scenedesmus sp. suspended and immobilised in non-toxic silica gel in leather processing wastewater

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-04-20 DOI:10.1080/02757540.2023.2199725

B. S. C. Barcellos, C. B. Agustini, G. S. Rolim, João H. Z. Santos, M. Gutterres

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引用次数: 1

Abstract

ABSTRACT Microalgae have been effectively used as a nutrient removal method in wastewater treatment. However, the harvesting microalgae step is a major hurdle to the industry. In this study, the silica non-toxic sol–gel is used as a matrix to immobilise microalgae. Non-toxic silica gel matrix was synthesised by tetraethoxysilane (TEOS) derived alcohol free route. This study aims to evaluate the effect of microalgae immobilisation in non-toxic silica gel to remove tanneries wastewater pollutants. The experiments were conducted by applying immobilised Scenedesmus sp. and Chlorella sp. in three concentrations in leather processing wastewater during 72 h of cultivation. The morphology of immobilisation was evaluated by optical microscopy, SEM and Zeta Potential analysis. The rate removals of total nitrogen (TN), total organic carbon (TOC) and Inorganic Carbon (IC) in comparison to immobilised and suspended microalgae were evaluated by the influence of the immobilisation, type of microalgae and microalgae concentration. For both microalgae, immobilisation showed promise for removing these nutrients. The immobilised Chlorella sp. at the initial concentration of 5.84 ± 0.975 mg.L−1 (I-Ch2) had the highest removal by immobilised microalgae, with an uptake of 20.82% of AN, 18.44% of TN, 30.42% of TOC and 64.73% of IC.

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小球藻和场景藻悬浮和固定在无毒硅胶中去除皮革加工废水中的碳和氮

微藻作为一种有效去除废水中营养物质的方法已得到广泛应用。然而，微藻的收获步骤是该行业的一个主要障碍。在本研究中，二氧化硅无毒溶胶-凝胶被用作固定微藻的基质。采用四乙氧基硅烷（TEOS）衍生的无醇路线合成了无毒硅胶基质。本研究旨在评价在无毒硅胶中固定微藻对制革废水污染物的去除效果。采用固定化Scenedesmus sp.和小球藻sp.在皮革加工废水中的三种浓度进行了72 培养h。通过光学显微镜、扫描电镜和Zeta电位分析对固定化的形态进行了评价。通过固定化、微藻类型和微藻浓度的影响来评估与固定化和悬浮微藻相比的总氮（TN）、总有机碳（TOC）和无机碳（IC）的去除率。对于这两种微藻来说，固定化有望去除这些营养物质。初始浓度为5.84的固定化小球藻 ± 0.975 mg·L−1（I-Ch2）对固定化微藻的去除率最高，an、TN、TOC和IC的吸收率分别为20.82%、18.44%、30.42%和64.73%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.