Adsorption of Cd and Mn from neutral mine effluents using bentonite, zeolite, and stabilized dewatered sludge

IF 6 3区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Sciences Europe Pub Date : 2024-05-18 DOI:10.1186/s12302-024-00911-y

Veronika Prepilková, Juraj Poništ, Anna Ďuricová, Jozef Salva, Marián Schwarz, Dagmar Samešová, Martina Mordačová

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Abstract

This study aimed to investigate the adsorption efficiency of Cd and Mn using natural sorbents—bentonite, zeolite and stabilized digested dewatered waste sludge. The main contributions of the scientific article are in adding to the scientific knowledge of the use of natural and waste sorbents in the removal of heavy metals from neutral mine effluents. Current studies mainly focus on metal removal by sorption using natural sorbents from acid mine drainage. This study investigates sorption in neutral mine drainage. The efficiency of the sorption process was evaluated using the following parameters: efficiency (%) of metal ion removal, Freudlich and Langmuir adsorption isotherm constant. The AES–ICP method (atomic emission spectrometry with inductively coupled plasma) was used for the initial metal analysis of the materials used. The atomic absorption spectrometry (AAS) method was used for the analysis of Cd and Mn in the sorption process. The maximum efficiency of Mn removal by bentonite at the end of the test was approximately 90%. The removal of Mn by zeolite was considerably lower—about 20% compared to the use of sludge—80%. Based on the sorption efficiency, the sludge was suitable for sorption. Much higher levels of Cd sorption were achieved using sludge compared to using natural bentonite and zeolite. The main novelty of the work lies in the sorption of metals using dewatered digested sludge. Previous studies have focused on metal sorption using activated sludge. Most previous studies focused on sorption from acid mine drainage. The novelty of this study is that we focused on the sorption of neutral mine drainages, which are typical for the location we are monitoring.

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使用膨润土、沸石和稳定脱水污泥吸附中性矿山废水中的镉和锰

这项研究旨在调查天然吸附剂--膨润土、沸石和稳定消化脱水废渣对镉和锰的吸附效率。这篇科学文章的主要贡献在于增加了利用天然吸附剂和废物吸附剂去除中性矿山废水中重金属的科学知识。目前的研究主要集中在利用天然吸附剂从酸性矿井排水中吸附去除金属。本研究调查了中性矿井排水的吸附情况。吸附过程的效率采用以下参数进行评估：金属离子去除效率（%）、Freudlich 和 Langmuir 吸附等温线常数。AES-ICP 方法（电感耦合等离子体原子发射光谱法）用于对所用材料进行初步金属分析。原子吸收光谱法（AAS）用于分析吸附过程中的镉和锰。试验结束时，膨润土对锰的最大去除效率约为 90%。沸石对锰的去除率要低得多，约为 20%，而污泥的去除率为 80%。根据吸附效率，污泥适合用于吸附。与使用天然膨润土和沸石相比，污泥对镉的吸附水平要高得多。这项工作的主要创新点在于利用脱水消化污泥吸附金属。以前的研究主要集中在使用活性污泥对金属的吸附。以前的大多数研究侧重于酸性矿井排水的吸附。这项研究的新颖之处在于，我们将重点放在中性矿井排水的吸附上，这是我们监测地点的典型情况。

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来源期刊

Environmental Sciences Europe Environmental Science-Pollution

CiteScore

11.20

自引率

1.70%

发文量

110

审稿时长

13 weeks

期刊介绍： ESEU is an international journal, focusing primarily on Europe, with a broad scope covering all aspects of environmental sciences, including the main topic regulation. ESEU will discuss the entanglement between environmental sciences and regulation because, in recent years, there have been misunderstandings and even disagreement between stakeholders in these two areas. ESEU will help to improve the comprehension of issues between environmental sciences and regulation. ESEU will be an outlet from the German-speaking (DACH) countries to Europe and an inlet from Europe to the DACH countries regarding environmental sciences and regulation. Moreover, ESEU will facilitate the exchange of ideas and interaction between Europe and the DACH countries regarding environmental regulatory issues. Although Europe is at the center of ESEU, the journal will not exclude the rest of the world, because regulatory issues pertaining to environmental sciences can be fully seen only from a global perspective.