Bio-Based Adsorption as Ecofriendly Method for Wastewater Decontamination: A Review

Abstract

Intense human activities have for years contributed to the pollution of the environment by many dangerous pollutants such as heavy metals, pesticides, or polycyclic aromatic hydrocarbons. There are many conventional methods used to control pollution, with practical and/or financial drawbacks. Therefore, in recent years, an innovative, easy-to-implement and inexpensive adsorption method has been developed to recover waste and clean up water from micropollutants. Firstly, this article aims to summarize the issues related to water remediation and to understand the advantages and disadvantages of the methods classically used to purify water. In particular, this review aims to provide a recent update of the bio-based adsorbents and their use. Differently from the majority of the reviews related to wastewater treatment, in this article several classes of pollutants are considered. Then, a discussion about the adsorption process and interactions involved is provided. Finally, perspectives are suggested about the future work to be done in this field.

Innovative Remediation of Oily Water Utilizing Environmentally Friendly Fish-Scale Biosorbents

“…This phenomenon can be attributed to the rapid occupation of available surface sites during the 15-60-minute interval, after which the adsorption process stabilized, with a consistent percentage of the adsorbent's surface sites being occupied. This can be why the biosorbents may eventually reach equilibrium over an extended period, where the amount of oil adsorbed remains constant (Vievard et al, 2023). This is a point where the biosorbent's capacity for adsorption is fully utilized, and further contact time does not affect the removal efficiency (Alatabe et al, 2023).…”

Reusing Waste to Save Our Water: Regenerable Bioadsorbents for Effective Oil Sequestration

“…In the pursuit of effective and sustainable solutions, bioadsorbents have emerged as a promising avenue for oil sequestration from contaminated water sources 9. These bioadsorbents, derived from various natural sources, possess the capacity to selectively adsorb hydrophobic contaminants such as oil, presenting an eco‐friendly alternative to conventional cleanup methods 10, 11. However, their adoption hinges not only on efficient adsorption but also on their renderability, a crucial facet often overlooked in the discourse on bioadsorbents 12.…”

Toward Higher Resource Efficiency in Solid–Fluid Reactions: Dye Adsorption Study on the Planetary Rotating Bed Reactor

“…Examples of recent and future relevance are CO 2 capture 2 and water decontamination by adsorption. 3 In heterogeneous catalysis, the immobilization of enzymes 4 or inorganic catalysts 5 on solids is a key concept to facilitate their reuse. 1 The mechanoenzymatic degradation of lignocellulosic biomass 6 exemplifies a solid−liquid biorefinery process targeting a biobased economy.…”

“…Following the green chemistry principles, the intensification of such solid–fluid reactions plays a major role in the transformation to a circular economy. Examples of recent and future relevance are CO 2 capture and water decontamination by adsorption . In heterogeneous catalysis, the immobilization of enzymes or inorganic catalysts on solids is a key concept to facilitate their reuse .…”