Unlocking the adsorptive effectiveness of naturally occurring heulandite zeolite for the removal of PO43− and NO3− anions from wastewater

IF 2.9 4区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Fred Sifuna Wanyonyi, Francis Orata, Ponnadurai Ramasami, Emily Ngeno, Victor Shikuku, Robert O. Gembo, Gershom Kyalo Mutua, Anthony Pembere
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引用次数: 0

Abstract

The mitigation of high levels of phosphate (PO43−) and nitrate (NO3) ions in water bodies, particularly in agricultural wastewater, holds paramount importance in curbing eutrophication within aquatic ecosystems. Herein, using experimental and computational techniques, the study explored the potential of naturally occurring South Africa heulandite (HEU) zeolite for the removal of PO43− and NO3 ions from synthetic wastewater in batch mode. The percentage removal of PO43− and NO3 was 59.15% and 51.39%, respectively, whereas the corresponding maximum adsorption capacity of the adsorbent was 0.0236 and 0.0206 mg/g. The adsorption kinetics of both anions by HEU fitted well in the pseudo-first-order (PFO) kinetic model indicating a physisorption-mediated rate-determining step. It was revealed that the adsorption process was multi-mechanistic spontaneous and exothermic. Molecular simulations using Monte Carlo (MC) and density functional theory (DFT) methods also provided insights into the adsorption mechanisms.

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来源期刊
Environmental Monitoring and Assessment
Environmental Monitoring and Assessment 环境科学-环境科学
CiteScore
4.70
自引率
6.70%
发文量
1000
审稿时长
7.3 months
期刊介绍: Environmental Monitoring and Assessment emphasizes technical developments and data arising from environmental monitoring and assessment, the use of scientific principles in the design of monitoring systems at the local, regional and global scales, and the use of monitoring data in assessing the consequences of natural resource management actions and pollution risks to man and the environment.
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