Use of polyacrylamide-grafted Plantago psyllium mucilage as a flocculant for treatment of textile wastewater

Mishra, Anuradha; Srinivasan, Rajani; Bajpai, Malvika; Dubey, Rashmi

doi:10.1007/s00396-003-1003-1

Cited by 54 publications

(19 citation statements)

References 15 publications

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“…Schematic representation for the synthesis of grafted copolymers using conventional, microwave-initiated and microwave-assisted method 100 Conventional redox (or conventional free radical) grafting method using chemical free radical initiators (e.g. ceric ammonium nitrate (CAN)) 41,88,[94][95][96] with nitrogen as the inert gas is commonly used to synthesise grafted copolymers. However, conventional grafting method has the drawback of undesired homopolymer formation in the concurrent competing reaction.…”

Section: Grafting Methodsmentioning

confidence: 99%

“…87,109 As reported in a study, 99 polymer bridging was responsible for better flocculating property of the grafted copolymers over linear polymer where the segments of a polymer chain were adsorbed onto different particles, thus linking the particles together. Some studies 94,95 show that there was an optimal dosage at which the flocculation efficacy was maximum (i.e. the turbidity of the supernatant collected was minimum).…”

Section: Flocculation Mechanismmentioning

confidence: 99%

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A Review on Development and Application of Plant-Based Bioflocculants and Grafted Bioflocculants

Lee

Chong

Robinson

et al. 2014

Ind. Eng. Chem. Res.

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Flocculation is extensively employed for clarification through sedimentation. Application of ecofriendly plant-based bio-flocculants in wastewater treatment has attracted significant attention lately with high removal capability in terms of solids, turbidity, colour and dye. However, moderate flocculating property and short shelf life restrict their development. In order to enhance the flocculating ability, natural polysaccharides derived from plants are chemically modified by inclusion of synthetic, non-biodegradable monomers (e.g. acrylamide) onto their backbone to produce grafted bio-flocculants. This review is aimed to provide an overview of the development and flocculating efficiencies of plant-based bio-flocculants and grafted bio-flocculants for the first time. Furthermore, the processing methods, flocculation mechanism and the current challenges are discussed. All the reported studies about plant-derived bio-flocculants are conducted under lab-scale conditions in wastewater treatment. Hence, the possibility to apply natural bio-flocculants in food and beverage, mineral, paper and pulp, oleo-chemical and biodiesel industries is discussed and evaluated.

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Section: Grafting Methodsmentioning

confidence: 99%

Section: Flocculation Mechanismmentioning

confidence: 99%

A Review on Development and Application of Plant-Based Bioflocculants and Grafted Bioflocculants

Lee

Chong

Robinson

et al. 2014

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Natural and synthetic polymeric flocculants, which are able to destabilize colloidal suspensions, have been found wide application as flocculating agents in the past decade. Water-soluble synthetic polymers [9][10][11] have a disadvantage of non-biodegradability and cost-effective. Thus, the demand for effective, cheap and environmentally friendly natural flocculants for wastewater treatment is increasing.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and flocculation characteristics of cationic modified corncob: A novel polymeric flocculant

Pang¹,

Ding²,

Chen³

et al. 2013

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“…Previously, some work has been done on psyllium and functionalized psyllium has been used as flocculants in purification of water. [16][17][18][19][20] In the present study, Psy-cl-poly(AAm) has been investigated for its swelling behaviour as a function of time, temperature and pH in distilled water. The hydrogel has been studied for its controlled drug (5-ASA) release behaviour at different pH conditions.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Acrylamide and Natural Polysaccharide Based Polymeric Networks in Ph Controlled Release of 5-Amino Salicylic Acid

Kumar

Kaith

Mittal

2010

J. Chil. Chem. Soc.

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In this paper, psyllium (Psy) and acrylamide (AAm) based superabsorbent, synthesized using potassium persulphate (KPS) as an initiator and hexamethylene tetramine (HTMA) as a crosslinker, has been investigated for its swelling behaviour in distilled water as a function of time, temperature and pH. The hydrogel has further been applied for controlled delivery of 5-amino salicylic acid (5-ASA) under different pH conditions at 37 ºC. It has been found to show Fickian type mechanism as the drug release showed diffusion coefficient less than 0.50 for all the pH conditions.The gel characteristic constant has been found to show 6.9 × 10 -2 , 20.61 × 10 -2 and 33.4 × 10 -2 values for pH 4.0, 7.0 and 9.2, respectively. The initial diffusion coefficient has been found to show greater values than late diffusion coefficient confirming greater release at the early stages of the drug release than that in the late stages.

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Use of polyacrylamide-grafted Plantago psyllium mucilage as a flocculant for treatment of textile wastewater

Cited by 54 publications

References 15 publications

A Review on Development and Application of Plant-Based Bioflocculants and Grafted Bioflocculants

A Review on Development and Application of Plant-Based Bioflocculants and Grafted Bioflocculants

Synthesis and flocculation characteristics of cationic modified corncob: A novel polymeric flocculant

Utilization of Acrylamide and Natural Polysaccharide Based Polymeric Networks in Ph Controlled Release of 5-Amino Salicylic Acid

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