Decolourisation of palm oil mill biogas plant wastewater using Poly-Diallyldimethyl Ammonium Chloride (polyDADMAC) and other chemical coagulants

Effective coagulation-flocculation treatment of highly polluted palm oil mill biogas plant wastewater using dual coagulants: Decolourisation, kinetics and phytotoxicity studies

“…However, the colour removal was the lowest compared to others due to an excess of polyDADMAC molecules that cause charge reversal occurs on the particle surfaces , Ariffin et al, 2012. In addition, polyDADMAC alone can achieve up to 40% of colour removal at dosage of 1000 mg/L as shown elsewhere (Zahrim and Dexter, 2016). Fig.…”

“…Low solubility of magnesium hydroxide (0.009 g/L) forms precipitates, where precipitates adsorb to and enmesh particles as the flocs settle (FCH, 2011, Duan andGregory, 2003). The precipitates have large adsorptive surface area and positive electrostatic surface charge that can attract the negatively charged particles in the solution (Zahrim and Dexter, 2016, Zhang et al, 2011, Gao et al, 2007, Semerjian and Ayoub, 2003. This is the most probable reason why the amount of settled solids was higher due to mixing with white precipitate at the bottom of the beaker.…”

Enhanced Dyeability and Wash Fastness through a Salt-Free Plasma-Induced Grafting of Cationic Monomers on Cotton Fabrics

“…Dimethyldiallylammonium chloride (DADMAC) and its copolymer are widely used in textile printing and dyeing due to many advantages such as high positive charge density, good water solubility, easy molecular weight control, high efficiency, non-toxicity, and low cost [7][8][9][10][11][12][13][14]. Its main functions are electric neutralization, adsorption, flocculation, purification, and decolorization [15]. DADMAC is used as the monomer to form a polymer by homopolymerization or copolymerization.…”