Low Cost Absorbents, Techniques, and Heavy Metal Removal Efficiency

Abstract

Heavy metal contamination in water is a serious concern to the environment and human health. High concentrations of heavy metals in the environment can be toxic to a variety of living species. Natural bio-absorbents are abundant and inexpensive and considered a waste if not managed properly. The role of bio-absorbents has been widely studied and has been utilized for the removal of heavy metals. The objective of the chapter is to search the database for different absorbents and their efficiency for the removal of heavy metals. Key words related to the study have been used to select different papers published by the researchers all over the world. A rigorous three-tier process has been utilized by the authors to select the papers from the database for the current study. This chapter has identified a few research gaps in the field of heavy metal removal by using different low cast absorbents that need to be taken into account in future research.

Unlocking Heavy Metal Remediation Potential: A Review of Cellulose–Silica Composites

“…Adsorption is a cost-effective method for efficiently removing heavy metals from wastewater by binding metal ions to solid surfaces. While activated carbon (AC) remains a popular adsorbent due to its high surface area and microporous structure [21], there is increasing interest in low-cost bio-absorbents [22]. Low-cost bio-absorbents, including agricultural waste materials and bio-adsorbents like microbial biomass, have gained attention due to their affordability and effectiveness in metal removal [23,24].…”

Adsorption of Zn2+ from Synthetic Wastewater Using Dried Watermelon Rind (D-WMR): An Overview of Nonlinear and Linear Regression and Error Analysis

“…Over the previous three decades, wastewater treatment for heavy metal removal has been a focus of study [1]. Worldwide, as industrialization continues to grow, the water system has been badly impacted by pollution [2]. Industrial effluents have a negative impact on water ecosystems and living organisms [3].…”