Reusable lemon juice microwave-activated rice husk biochar for lead and mercury removal in solution

IF 3 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

International Journal of Environmental Science and Technology Pub Date : 2024-10-09 DOI:10.1007/s13762-024-06082-w

J. Payne, P. A. Atinga, E. Okoampah, A. B. Duwiejuah

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Abstract

Recently, increased heavy industrial revolution with accompanying effluent discharge is one reason for increased levels of lead and mercury in our waterways. The experiment focused on assessing the cycling stability by determining the adsorption efficiency of fresh and reused rice husk biochar and its modified forms in the removal of lead and mercury in mono and binary systems from aqueous solution. To overcome the challenge of practical life application, the adsorbents are bagged in muslin material and subjected to two consecutive tests. The adsorption capacities and efficiencies were generally high, with efficiencies often exceeding 99%. The pH effect observed was that low acidic conditions could facilitate high adsorption efficiencies, with different biochars responding variably to pH adjustments. The results underscore the potential of these muslin-bagged biochars as effective adsorbent products for Pb and Hg, with notable reusability of adsorbents based on second-batch adsorption efficiencies. The Langmuir and Freundlich isotherm models were also employed to analyze the data, with both models showing a good fit, as indicated by R² values of 1. It is concluded that biochar materials for removing toxic metals from aqueous solutions are reusable and achieve high adsorption efficiency which is a good feature of sustainable biochar technology.

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来源期刊

International Journal of Environmental Science and Technology 环境科学-环境科学

CiteScore

5.60

自引率

6.50%

发文量

806

审稿时长

10.8 months

期刊介绍： International Journal of Environmental Science and Technology (IJEST) is an international scholarly refereed research journal which aims to promote the theory and practice of environmental science and technology, innovation, engineering and management. A broad outline of the journal''s scope includes: peer reviewed original research articles, case and technical reports, reviews and analyses papers, short communications and notes to the editor, in interdisciplinary information on the practice and status of research in environmental science and technology, both natural and man made. The main aspects of research areas include, but are not exclusive to; environmental chemistry and biology, environments pollution control and abatement technology, transport and fate of pollutants in the environment, concentrations and dispersion of wastes in air, water, and soil, point and non-point sources pollution, heavy metals and organic compounds in the environment, atmospheric pollutants and trace gases, solid and hazardous waste management; soil biodegradation and bioremediation of contaminated sites; environmental impact assessment, industrial ecology, ecological and human risk assessment; improved energy management and auditing efficiency and environmental standards and criteria.