The Use of as Natural Coagulant in Algerian Drinking Water Treatment Plant

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 results showed that the use of coagulants obtained by using different solvents increases the coagulation efficiency compared to the coagulant obtained from the raw material, for example the maximum turbidity removal efficiency was 28.23, 78.07, 83.46 and 85.15% when using powdered Aloe vera (raw material), AV-NaCl (0.5 M), AV-NaOH (0.05 M) and AV-HCl (0.05 M), respectively. The results defined, that the residual turbidity obtained in this work, where the Aloe vera was used (after treatment by solvents) produced a turbidity lower than the Algerian standard (5 NTU) with initial turbidity (13 NTU). In this study, the infrared spectrum study and analysis has revealed the presence of different functional groups, which are responsible for the coagulation process.

Use of Extracted Proteins from Oak Leaves as Bio-Coagulant for Water and Wastewater Treatment: Optimization by a Fractional Factorial Design

“…In general, the extraction of bio-coagulants from plants is achieved by three steps: (i) mechanical and physical treatments; (ii) extraction of the coagulant agent by using distilled water [11], either a saline solution [12][13][14][15][16] or a suitable solvent (i.e., acid or base) [13,17]; (iii) purification of the coagulant agent. This agent can belong to carbohydrates, proteins, flavonoids, tannins, total phenolics or cellulose, depending on the plant used to extract the active agent [18][19][20][21][22][23][24].…”

Utilization of aloe vera as a biocoagulant for turbidity, total dissolved solid (TDS), and iron (Fe) removal in well water

“…With an initial turbidity value of 424 NTU, there was a considerable decrease in turbidity value of 96.99%, resulting in a final turbidity value of 12.75 NTU at a dose of 0.5 ml and a stirring time of 10 minutes. Previous research also showed that the addition of LB-HCl coagulant can remove turbidity values with removal efficiency between 59.23% to 85.15% [12]. As shown in Figure . 6 3, the addition of LB-HCl coagulant to well water resulted in a significant decrease in turbidity values [13].…”

Investigation on the removal of contaminants from washing machine discharge using Strychnos potatorum (clearing nut) – A potential purifying agent

“…The peak at 2922.28 cm −1 is attributed to the –CH 2 stretching vibration of the alkyl group. The peak at 2349.75 cm −1 is responsible for C N stretching [ 40 ]. A bending vibration at 1596.42 cm −1 confirmed the existence of water.…”