article · Water Resources and Industry
This research reviewed existing literature on using cow dung as an adsorbent to remove heavy metal ions, such as zinc, copper, lead, nickel, and cadmium, from aqueous solutions. The presence of these metals in water is a significant environmental concern. The review focused on studies that employed batch experiments and also considered the health and environmental risks associated with metal ions. Additionally, it examined the kinetic and isothermal models typically used to fit biosorption experimental data. The overall conclusion was that cow dung shows promise as an effective and sustainable adsorbent for sequestering heavy metals from wastewater and the environment.
Addressing heavy metal contamination in water is crucial for environmental protection and public health. This research highlights a sustainable and readily available material, cow dung, as a potential solution, offering an eco-friendly approach to water purification.
This work suggests an early-stage application for wastewater treatment, where cow dung could be developed into a low-cost adsorbent material. Potential users include municipal water treatment plants or industrial facilities dealing with heavy metal effluent. As a review, it establishes the concept's promise, indicating further research and development are needed to move towards practical, large-scale implementation.
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The presence of heavy metals (e.g., Zn, Cu, Pb, Ni, Cd, etc.) in aqueous solutions constitutes a major environmental problem. The present work represents a review of the recently published literature discussing the use of cow dung as adsorbent for the removal of metal ions from aqueous solution using batch experiments. The potential health and environmental hazards of metal ions in addition to the kinetic and isothermal models usually assessed to fit the biosorption experimental data were also reviewed. Conclusively, it was established that the use of cow dung is a promising adsorbent in the removal of heavy metals from waste waters and environment.
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DOI: 10.1016/j.wri.2016.02.002
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