Experimental evaluation of eco-friendly flocculants prepared from date palm rachis.

Sodium carboxymethylcellulose (CMCNa) is an anionic water soluble polyelectrolyte widely used in many industrial sectors including food, textiles, papers, adhesives, paints, pharmaceuticals, cosmetics and mineral processing. CMCNa was produced by chemical modification of cellulose, and represents many advantages: natural, renewable, non-toxic and biodegradable. In this study, different kinds of CMCNa, prepared from an agricultural waste date palm rachis, were tested as eco-friendly flocculants for drinking water treatment and their performances as flocculants in turbidity removal enhancement were assessed.

Chemical modification of Posidonia with cyclic anhydrides: effect on thermal stability.

In the present work, we studied the chemical modification of Posidonia with maleic (AM) and phthalic (AP) anhydrides, and in the absence of any solvent. We used tripropylamine (TPA) as a catalyst and the mixture underwent an ultrasonic pretreatment. The influence of ultrasonic pretreating time, reaction time, temperature, anhydride concentration, was investigated.

Preparation and characterization of new succinic anhydride grafted Posidonia for the removal of organic and inorganic pollutants.

The present work describes the preparation of new chelating materials derived from Posidonia for adsorption of heavy metal ions and dye in aqueous solution. The first part of this report deals with the chemical modification of Posidonia with succinic anhydride. Thus, we have obtained materials with various succinyl groups contents (from 29.