Abderrezzaq Benalia^1,2,*, Kerroum Derbal², Zahra Amrouci^2,3, Ouiem Baatache², Amel Khalfaoui⁴, Antonio Pizzi^5,*

Journal of Renewable Materials, Vol.12, No.4, pp. 667-698, 2024, DOI:10.32604/jrm.2024.048306 - 12 June 2024

Abstract This review describes the mechanisms of natural coagulants. It provides a good understanding of the two key processes of coagulation-flocculation: adsorption and charge neutralization, as well as adsorption and bridging. Various factors have influence the coagulation/flocculation process, including the effect of pH, coagulant dosage, coagulant type, temperature, initial turbidity, coagulation speed, flocculation speed, coagulation and flocculation time, settling time, colloidal particles, zeta potential, the effects of humic acids, and extraction density are explained. The bio-coagulants derived from plants are outlined. The impact of organic coagulants on water quality, focusing on their effects on the physicochemical… More > Graphic Abstract

Hajjar Hartini Wan Jusoh¹, Nor Azman Kasan^2,*, Hidayah Manan², Nurfarahana Mohd Nasir^1,3, Fareza Hanis Mohd Yunos¹, Sofiah Hamzah¹, Ahmad Jusoh^1,2,*

Journal of Renewable Materials, Vol.11, No.5, pp. 2321-2332, 2023, DOI:10.32604/jrm.2023.026086 - 13 February 2023

Abstract Implementation of biofloc technology (BFT) system in aquaculture industry shows high productivity, low feed conversion ratio, and an optimum culture environment. This study was divided into two phases. The first phase involved maintaining the water quality using the optimum carbon-to-nitrogen ratio by manipulating pH in culture water. The second phase examined the performance of harvesting biofloc (remaining phytoplankton and suspended solids in the system) using chicken eggshell powder (CESP). This study showed that pH 7 to 8 were the best biofloc performance with high removal percentage of ammonia (>99%) with a remaining ammonia concentration of… More > Graphic Abstract

Abderrezzaq Benalia^1,2, Kerroum Derbal^2,*, Amel Khalfaoui¹, Antonio Pizzi³, Ghouti Medjahdi⁴

Journal of Renewable Materials, Vol.10, No.3, pp. 625-637, 2022, DOI:10.32604/jrm.2022.017848 - 28 September 2021

Abstract The purpose of this work is the study the ability of the plant material Aloe vera to act as natural coagulant using raw water obtained from a drinking water treatment plant (Mila, Algeria). Different solvents such as: NaCl; NaOH and HCl were used as chemical activators to extract the active components from the Aloe vera plant, and different coagulation-flocculation experiments were conducted in a jar test apparatus to evaluate the performance of the extracted coagulant. Also, the effect of coagulant dose on some water parameters such as turbidity, pH, total alkalinity and organic matter were investigated. The… More > Graphic Abstract

Raimundo N. Lima Júnior¹, João L. I. O. Almeida¹, Jones de Andrade², Flávia O. M. S. Abreu^1,*

Journal of Renewable Materials, Vol.8, No.11, pp. 1489-1504, 2020, DOI:10.32604/jrm.2020.011629 - 28 September 2020

Abstract Biocoagulants emerges as a promising technology in water treatment, in order to exploit renewable and biodegradable materials. The present work aims to study the coagulant action of chitosan and carboxymethylchitosan on water with very high turbidity (above 300 NTU), contrasting the physicochemical results with those obtained for aluminum sulphate. Carboxymethylchitosan was produced by the Williamson’s ethers synthesis and characterized by potentiometric titration, FTIR and ¹ H-NMR. The coagulant tests were performed using synthetic water in a Jar-test equipment, through the induction of high and low velocity gradients, followed by sedimentation. The results showed turbidity and color More >

Justin Georgekutty¹, Amir Kazerouninia², YunFei Wang³, Peter R. Ermis⁴, Dhaval R. Parekh⁴, Wayne J. Franklin⁴, Wilson W. Lam⁴

Congenital Heart Disease, Vol.13, No.4, pp. 541-547, 2018, DOI:10.1111/chd.12603

Abstract Objective: Adult Fontan patients are at increased risk for thrombosis and thromboembolic complications leading to increased morbidity and mortality. Most are prescribed antiplatelet or anticoagulant therapy for thromboprophylaxis; novel oral anticoagulants (NOACs) are uncommonly used given lack of data on their use in this population and generalized concerns regarding Fontan patients’ abnormal coagulation. We report the largest single-center experience with the use of NOACs for treatment and prophylaxis of thrombosis and thromboembolism in adult Fontan patients.
Results: A retrospective chart review identified 21 patients (11 female, 10 male), median age 33 years (18-50) at first initiation, who… More >