Garden cress mucilage as a potential emerging biopolymer for improving turbidity removal in water treatment

Lim, Boon-Chin; Lim, Jun-Wei; Ho, Yeek‐Chia

doi:10.1016/j.psep.2018.08.015

Cited by 24 publications

(8 citation statements)

References 53 publications

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“…This result was consistent with the previous estimated ζ-potential of biopolymers extracted from L. sativum , which was 16 mV. 62 It was found that the ζ-potential values of PVA, PVA/TEE, and PVA/polys NFs were −0.62, −22.7, and −5.9 mV, respectively. It was clearly observed that PVA/TEE and PVA/poly NFs have more negative ζ-potential than PVA NFs alone.…”

Section: Resultssupporting

confidence: 92%

“…This result was consistent with the previous estimated ζ-potential of biopolymers extracted from L. sativum, which was 16 mV. 62 Meanwhile, the effect of polysaccharides incorporated on decreasing the swelling ratio was sharply compared to L. sativum TEE, owing to its constant slow swelling rate. This might be attributed to a high content of mucilaginous substance in L. sativum TEE that can absorb water and produce a large amount of hydrocolloids with high molecular weight.…”

Section: ■ Materials and Methodssupporting

confidence: 91%

“…Additionally, the appearance of strong bands around 2924 and 2854 cm –1 were attributed to the -aliphatic CH stretching and bending vibrations. 62 In the spectra of TEE L. sativum , characteristic bands of flavonoids appeared at 1602 and 1455 cm –1 due to the stretching vibration of C=C, C=O, CH 3 , CH 2 , and aromatic rings. 63 Moreover, the two distinctive bands of hydroxyl flavonoids at 1513 cm –1 and 1272 cm –1 would be related to the N–H bending vibration and C–O.…”

Section: Resultsmentioning

confidence: 99%

“…Both the FTIR spectra of TEE and polysaccharides showed bands attributed to free hydroxyl groups and the bonded O–H of carboxylic acid at around 3297 and 3261 cm –1 , respectively. Additionally, the appearance of strong bands around 2924 and 2854 cm –1 were attributed to the -aliphatic CH stretching and bending vibrations . In the spectra of TEE L.…”

Section: Resultsmentioning

confidence: 99%

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Development of Lepidium sativum Extracts/PVA Electrospun Nanofibers as Wound Healing Dressing

et al. 2022

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Lepidium sativum L. (Garden cress/Hab El Rashad) (Ls), family Brassicaceae, has considerable importance in traditional medicine worldwide because of its antioxidant and anti-inflammatory activities. Ls fruits were used in Ayurvedic medicines as a useful drug for injuries, skin, and eye diseases. The aim of this study was to examine the effectiveness of the total ethanol extract (TEE) and polysaccharide (Poly) of Ls seeds loaded on poly(vinyl alcohol) (PVA) nanofibers (NFs) as a wound healing dressing and to correlate the activity with the constituents of each. TEE and Poly were phytochemically analyzed qualitatively and quantitatively. Qualitative analysis proved the presence of phenolic acids, flavonoids, tannins, sterols, triterpenes, and mucilage. Meanwhile, quantitative determinations were carried out spectrophotometrically for total phenolic and total flavonoid contents. High-performance liquid chromatography (HPLC) for TEE identified 15 phenolic acids and flavonoid compounds, with gallic acid and catechin as the majors. Separation, purification, and identification of the major compounds were achieved through a Puriflash system, column Sephadex LH20, and spectroscopic data ( 1 H, 13 C NMR, and UV). Eight compounds (gallic acid, catechin, rutin, kaempferol-3- O -rutinoside, quercetin-3- O -rhamnoside, kaempferol-3- O -rhamnoside, quercetin, and kaempferol) were obtained. Gas–liquid chromatography (GLC) analysis for Poly identified 11 compounds, with galactose being the main. The antioxidant activity for both extracts was measured by three different methods based on different mechanisms: 1,1-diphenyl-2-picrylhydrazyl (DPPH), ferric reducing ability of plasma (FRAP), and 3-ethylbenzothiazoline-6-sulfonic acid (ABTS). TEE has the highest effectiveness as an antioxidant agent with IC 50 82.6 ± 8.35 μg/mL for DPPH and 772.47 and 758.92 μM Trolox equivalent/mg extract for FRAP and ABTS, respectively. The PVA nanofibers (NFs) for each sample were fabricated by electrospinning. The fabricated NFs were characterized by SEM and Fourier transform infrared spectroscopy (FTIR); the results revealed successful encapsulation of TEE and Poly in the prepared NFs. Moreover, the swelling index of TEE in the prepared NFs shows that it is the most appropriate for use as a wound dressing. Cytotoxicity studies indicated a high cell viability with IC 50 216 μg/mL and 1750 μg/mL for TEE and Poly, respectively. Moreover, the results revealed that nanofibers possess higher cell viability compared to solutions with the same sample quantities: 9-folds for TEE and 4-folds for Poly of amount 400 μg. The in vitro wound healing test showed that the TEE nanofibers performed better than Poly nanofibers in accelerating wound healing, with 90% for TEE, more than that for the Poly extract (82%), after 48 h. These findings implied that the incor...

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Section: Resultssupporting

confidence: 92%

Section: ■ Materials and Methodssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Development of Lepidium sativum Extracts/PVA Electrospun Nanofibers as Wound Healing Dressing

et al. 2022

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“…The OFI fruit peel mucilage used as a biocoagulant in this study has a zeta potential of −23.63 ± 0.55 mV, which is consistent with its anionic nature [ 31 ]. Under optimal values (i.e., pH = 13 and coagulant dose = 12 mg/L), the flocs formed using this biocoagulant showed an increase in the absolute zeta potential (−37.10 ± 2.03 mV), indicating that coagulation occurs through an adsorption mechanism–particle bridge.…”

Section: Resultsmentioning

confidence: 55%

Evaluation of Turbidity and Color Removal in Water Treatment: A Comparative Study between Opuntia ficus-indica Fruit Peel Mucilage and FeCl3

et al. 2022

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Natural coagulants derived from by-products have gained popularity as sustainable alternatives to inorganic coagulants in water/wastewater treatment due to their abundant availability, biodegradability, low cost, easy disposal and low sludge volumes. In this study, the mucilage obtained from the peel of Opuntia ficus-indica fruit was evaluated as a biocoagulant for treating synthetic turbid water and compared with a traditional chemical coagulant (FeCl3). The effects of coagulant dosage and pH on the turbidity and color-removal efficiency of synthetic turbid water were analyzed. To estimate the coagulation mechanism, the flocs produced under optimal values were characterized structurally (FTIR and zeta potential) and morphologically (SEM). The optimal condition for the removal of turbidity and color was a coagulant dose of 12 mg/L at pH 13. For the optimal values, the biocoagulant and the FeCl3 presented a maximum removal of 82.7 ± 3.28% and 94.63 ± 0.98% for turbidity and 71.82 ± 2.72% and 79.94 ± 1.77% for color, respectively. The structure and morphology of the flocs revealed that the coagulation mechanism of the mucilage was adsorption and bridging, whereas that of FeCl3 was charge neutralization. The results obtained showed that the mucilage could be used as an alternative coagulant to replace FeCl3.

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Recent Advancement and Efficiency Hindering Factors in the Wastewater Treatment Plant: A Review

Awasthi

Moten

2022

Recent Trends in Wastewater Treatment

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Garden cress mucilage as a potential emerging biopolymer for improving turbidity removal in water treatment

Cited by 24 publications

References 53 publications

Development of Lepidium sativum Extracts/PVA Electrospun Nanofibers as Wound Healing Dressing

Development of Lepidium sativum Extracts/PVA Electrospun Nanofibers as Wound Healing Dressing

Evaluation of Turbidity and Color Removal in Water Treatment: A Comparative Study between Opuntia ficus-indica Fruit Peel Mucilage and FeCl3

Recent Advancement and Efficiency Hindering Factors in the Wastewater Treatment Plant: A Review

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