A preliminary evaluation of turbidity removal by natural coagulants indigenous to Venezuela

Díaz, Altamira; Rincón, Nancy; Escorihuela, Alejandro; Fernández, Nola; Chacín, Elsa; Forster, C.F.

doi:10.1016/s0032-9592(99)00085-0

Cited by 155 publications

(84 citation statements)

References 6 publications

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“…Further increase (above pH 10.0) or decrease (below pH 6.0) in pH of pond water made it coagulated without an added natural coagulant. These results are not in accordance with reports, that higher pH values are optimal for other natural coagulants derived from M. oleifera [25], P. juliflora and C. latifaria [28], C. angustifolia [26], and common bean [29]. However, T. foenum-graecum extract can be used as natural coagulant within the recommended pH range for tap water, which is from 6.5 to 8.5 [30].…”

Section: Properties Of Treated and Untreated Watercontrasting

confidence: 74%

Evaluation of eco-friendly coagulant from <i>Trigonella foenum-graecum</i> seed

Ramamurthy¹,

Maheswari²,

Selvaganabathy³

et al. 2012

ABC

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The ability of seed extracts of Trigonella foenum-graecum (T. foenum-graecum) and Cuminum cyminum (C. cyminum) to act as natural coagulants was tested using natural turbid water. Seed extracts were prepared using distilled water and NaCl (0.5 M and 1.0 M) solution. Only 1.0 M NaCl extract of T. foenum-graecum had coagulation capability and did not depend on pH values. Further it showed that natural coagulant obtained from T. foenum-graecum is temperature (up to 100˚C) and pH stable (pH 4.0 -10.0). Extract of C. cyminum had very minimal (16 ± 2) coagulation property. The seed extract of T. foenum-graecum showed about 80% coagulation properties, where as the best known natural coagulants such as Strychnos potatorum and Moringa oleifera, and chemical coagulant such as Al 2 (SO 4 ) 3 showed around 90%, 65% and 95% respectively, which are used as standards for the present study. When compared with pond water, T. foenum-graecum extract treated water shows decrease in alkalinity, turbidity, KMnO 4 demand and total coliform. This study reveals that seed extract of T. foenum-graecum can be used as natural water coagulant.

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Section: Properties Of Treated and Untreated Watercontrasting

confidence: 74%

Evaluation of eco-friendly coagulant from <i>Trigonella foenum-graecum</i> seed

Ramamurthy¹,

Maheswari²,

Selvaganabathy³

et al. 2012

ABC

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“…Further, it can be used for the reduction of organic carbon, color, aromatic, and humic acid content (Santos et al 2012). The coagulation activity of other plant materials from Cactus latifaira (Diaz et al 1999), vegetable tannins (Ö zacar and Ş engil 2003), bean (Phaseolus vulgaris sp.) (Antov et al 2010), red bean (Phaseolus vulgaris sp.…”

Section: Introductionmentioning

confidence: 99%

Coagulant proteins identified in Mustard: a potential water treatment agent

Bodlund

Pavankumar

Chelliah

et al. 2013

Int. J. Environ. Sci. Technol.

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The use of natural coagulant protein in drinking water treatment has been discussed for a long time, though the method is still not in practice, probably due to limited knowledge and availability of material. In the present work, different Mustard varieties were tested for the presence of coagulant protein compared with Moringa seed extract and their potential application in water treatment. The coagulation activity of the protein extract was measured using synthetic clay solution as well as water from pond. The protein content was determined by Bradford method, molecular mass determined by Sodium dodecyl sulfate-polyacrylamide gel electrophoresis, and peptide sequence was analyzed by Mass spectrometry. Extract of Mustard (large) and Moringa seed showed coagulation activity of %70 and %85 % after 90 min, respectively. Interestingly, seed extracts from other Mustard varieties had coagulation activity after heat activation at 95°C for 5 h. However, the coagulation activity of Mustard seed extract against turbid pond water was higher (%60 %) compared to Moringa seed extract (%50 %). The peptide sequence analysis of 6.5 and 9 kDa proteins was found to be homologous to Moringa coagulant protein and napin3, respectively. To our knowledge, this could be the first report on Mustard seed having coagulant protein. The coagulation activity of Mustard (large) against highly turbid pond water suggested that it could be a potential natural coagulant for water treatment.

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“…[3] Many plants have been used to clarify water. These include [6] MO is among the 14 species of trees that belong to the family Moringaceae. [7] Moringa oleifera is the most widely cultivated species of a Monogeneric family, the Moringaceae, that is, native to the subHimalayan tracts of India, Pakistan, Bangladesh and Afghanistan, [1] As well as medicinal plant, Moringa oleifera Lam.…”

Section: World Journal Of Pharmaceutical Researchmentioning

confidence: 99%