University Of Tehran Press Pollution 2383-451X 10 1 2024 01 01 Performance of Natural Coagulant Extracted from Castanea Sativa Tree Leaves in Water Purification processes 299 312 95581 10.22059/poll.2023.358433.1896 EN Manar Banwan Hasan Environmental Engineering Department, College of Engineering, Mustansiriyah University, Baghdad, Iraq 0000-0002-1331-5293 Ahmad Benwan Hassan Civil Engineering Department, College of Engineering, Al-Iraqia University, Baghdad, Iraq 0000-0001-9557-2631 Israa M. Al-Tameemi Environmental Engineering Department, College of Engineering, Mustansiriyah University, Baghdad, Iraq 0000-0003-4098-8052 Nawar Banwan Hassan Imam alkadhum college (IKC), Baghdad, Iraq 0000-0003-3123-8591 Journal Article 2023 04 30 Numerous coagulants, including natural and chemical coagulants, have been examined in the context of water purification. The use of natural coagulants constitutes an affordable and eco-friendly method of purifying water. The main aim of the current study was represented by investigated the feasibility of coagulant extracted from Castanea Sativa Tree Leaves using three different salts and distilled water. The active coagulant component was extracted using 0.25, 0.5, and 1 M of NaCl and KCl, 0.025, 0.05, and 0.1 M of NaOH, and distilled water. Powdered Castanea Sativa Tree Leaves was also used as a coagulant. Jar tests were performed using synthetic turbid water, a turbidity level of 35 NTU to investigate the coagulants’ activity. The pH was measured to study the influence of a range of different pHs, coagulant doses and initial turbidity were also investigated to optimize the coagulation process. The highest level of activity was achieved using 0.5 ml/l of coagulant extracted with 0.5 M NaCl at pH level 8. Coagulant extracted using 0.05 M NaOH demonstrated the second highest level of activity. Poor coagulant activity was observed for the powdered Castanea Sativa Tree Leaves and distilled water extract. The protein content of the extracted coagulant was 0.322, 0.283, and 0.274 mg/ml using 0.05 M NaCl, 0.5 M NaOH, and 0.5 M KCl, respectively. The use of this natural coagulant was also found to moderately increase organic matter content in the treated water, which was proportional to protein contents of the extracts. Coagulation results were statistically examined using SigmaPlot 12.5 software. https://jpoll.ut.ac.ir/article_95581_4a987fdbf2000f78b0f1cfcba5ca1f7c.pdf