Removal of dyes by agricultural waste

• Published in: Sustainable chemistry and pharmacy 2020-06, Vol.16, p.100259, Article 100259
• Main Authors: Kadhom, Mohammed, Albayati, Noor, Alalwan, Hayder, Al-Furaiji, Mustafa
• Format: Article
• Language: English
• Subjects: Adsorption; Agricultural waste; Biowaste; Dyes removal; Methylene blue; Peels
• ISSN: 2352-5541; 2352-5541
• DOI: 10.1016/j.scp.2020.100259

Biowaste is an important sustainable source of adsorption activities for many harmful materials, such as hazardous metals/elements and organics. It has many advantages over the conventional materials due to its low cost, abundance, affective adsorption capacity, and recyclability. Dyes are mainly organics with different structures and molecular weights; they are harmful to the environment and organisms if they were not efficiently treated before releasing. However, there is a massive number of dyes that classified into different categories, and there are different adsorbents that were reported for dyes adsorption. Among these dyes, methyl dyes with their different colors are very common in researches because of their availability and easiness in the study. Also, there are various biosorbents that were used, prepared, or grafted from different parts of plants and animals. In this review, we are focusing on the use of plant parts, such as the leaf, peel, etc. in dyes removal. Researches numbers in this field are increasing yearly (based on Scopus database information), which indicates the importance of this type of material; though, we selected a group of articles to focus on to clarify the idea in summary. Different adsorption capacities, operation conditions, and applying forms were studied, and the reported results showed that biomass adsorbents are so influential and recyclable. The adsorption kinetics and isotherms were illustrated and tabled for selected studies to show the adsorbents behaviors and adsorption mechanisms. •Agricultural waste is used to remove different types of dyes.•The agricultural waste is worthy due to its low cost, abundance, and durability.•The agricultural waste proved its high efficiency in pollutants removal from water.•The research in this area is getting an increasing attention.