Valorization of Rapeseed Waste Biomass in Sorption Processes for Wastewater Treatment

Abstract

Circular economy provides an efficient framework for effective biomass valorization, through strategic use and processing of resources and waste reuse. Being the second largest energetic crop, rapeseed (RS) presents a high potential in this sense. However, good management of the large quantity of generated wastes from agro-industrial activities is required. The most common management strategies in this sense refer to the reuse of RS wastes (mainly stems and press-cake) for animal feed, compost, soil amendment and fertilizer. Valorization of RS wastes as adsorbent for wastewater treatment is attractive. Despite the fact that only few articles on this subject exist in literature, they are sufficient to reflect the potential of this adsorbent to remove both inorganic and organic compounds from aqueous phase. The rapeseed wastes were used in native form (for diluted effluents) or modified by chemical or thermal treatment (for concentrated effluents or large molecule contaminants). This chapter will provide a review on the RS wastes management strategies, highlighting the applications for removing contaminants from wastewater in single and multi-component systems, in static or continuous operation mode.

Removal of Diclofenac and Heavy Metal Ions from Aqueous Media Using Composite Sorbents in Dynamic Conditions

“…Persistency, toxicity, stability, low biodegradability and bio-accumulative behavior are some of the main characteristics associated with pharmaceuticals and heavy metal ions present in aquatic ecosystems [ 2 , 3 ]; these compounds are part of the priority/emerging pollutants and represent significant threats to human health, aquatic ecosystems and requirements for further water/wastewater treatment. Harmful heavy metal cations such as lead, nickel, cadmium and pharmaceuticals such as diclofenac (DCF) are often found in wastewater, thus representing the focus of numerous adsorption studies [ 4 , 5 , 6 , 7 , 8 ]. The removal of these micropollutants from wastewater to make it reusable is a mandatory requirement.…”