Sawdust for the Removal of Heavy Metals from Water: A Review

Molecules

Elie Meez¹  George Z. Kyzas¹  Abbas Rahdar² 

[1] Department of Chemistry, International Hellenic University, 65404 Kavala, Greece;Department of Physics, University of Zabol, Zabol 98613-35856, Iran;

关键词: heavy metals;    adsorption;    sawdust;    aqueous solution;    thermodynamics;    kinetics;   

DOI  :  10.3390/molecules26144318

来源: DOAJ

【 摘 要 】

The threat of the accumulation of heavy metals in wastewater is increasing, due to their abilities to inflict damage to human health, especially in the past decade. The world’s environmental agencies are trying to issue several regulations that allow the management and control of random disposals of heavy metals. Scientific studies have heavily focused on finding suitable materials and techniques for the purification of wastewaters, but most solutions have been rejected due to cost-related issues. Several potential materials for this objective have been found and have been compared to determine the most suitable material for the purification process. Sawdust, among all the materials investigated, shows high potential and very promising results. Sawdust has been shown to have a good structure suitable for water purification processes. Parameters affecting the adsorption mechanism of heavy metals into sawdust have been studied and it has been shown that pH, contact time and several other parameters could play a major role in improving the adsorption process. The adsorption was found to follow the Langmuir or Freundlich isotherm and a pseudo second-order kinetic model, meaning that the type of adsorption was a chemisorption. Sawdust has major advantages to be considered and is one of the most promising materials to solve the wastewater problem.

【 授权许可】

Unknown