Application of polyaniline nanocomposite coated on rice husk ash for removal of Hg(II) from aqueous media

Ghorbani, Mohsen; Lashkenari, Mohammad Soleimani; Eisazadeh, Hossein

doi:10.1016/j.synthmet.2011.05.016

Cited by 70 publications

(21 citation statements)

References 25 publications

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“…10-20 wt % of the initial fuel remains as ash rich in silica (i.e., "biogenic silica"). It can be an economically valuable material for various applications including the cement and concrete industry [25][26][27], an adsorbent to remove heavy metal ions such as lead (II), mercury (II), zinc (II) and nickel (II) ions from wastewater streams, as catalyst [28][29][30][31][32][33][34][35][36][37][38], for synthesis of zeolites and mesoporous silica [39][40][41][42][43][44][45][46] or for drug delivery systems [47,48]. Depending on the anticipated application, biogenic silica is required with different purities.…”

Section: Introductionmentioning

confidence: 99%

Generation of High Quality Biogenic Silica by Combustion of Rice Husk and Rice Straw Combined with Pre- and Post-Treatment Strategies—A Review

et al. 2019

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Utilization of biomass either as a renewable energy source or for the generation of biogenic materials has received considerable interest during the past years. In the case of rice husk (RH) and rice straw (RS) with high silica contents in the fuel ash, these approaches can be combined to produce high-grade biogenic silica with purities >98 wt % from combustion residues. The overall process can be considered nearly neutral in terms of CO2 emission and global warming, but it can also address disposal challenges of rice husk and rice straw. For the resulting biogenic silica, several advanced application opportunities exist, e.g., as adsorbents, catalysts, drug delivery systems, etc. This article provides a comprehensive literature review on rice husk and rice straw combustion as well as applied strategies for raw material pre-treatment and/or post-treatment of resulting ashes to obtain high quality biogenic silica. Purity of up to 97.2 wt % SiO2 can be reached by combustion of untreated material. With appropriate fuel pre-treatment and ash post-treatment, biogenic silica with purity up to 99.7 wt % can be achieved. Studies were performed almost exclusively at a laboratory scale.

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Section: Introductionmentioning

confidence: 99%

Generation of High Quality Biogenic Silica by Combustion of Rice Husk and Rice Straw Combined with Pre- and Post-Treatment Strategies—A Review

et al. 2019

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“…In the last decade, agricultural and forestry by-products such as rice husk and rice husk ash, [14][15][16][17] waste tea, 18 wood sawdust (WSD), [19][20][21][22] and so forth 23 have increasingly generated interest in many emerging applications, especially adsorption process. These materials are used in the formulation of composite materials because of their flexibility, abundant availability in nature, biodegradability, variety, low cost, clean, and also environmental friendliness.…”

Section: Introductionmentioning

confidence: 99%

Performance enhancement of thin‐film composite membranes in water desalination process by wood sawdust

Namaghi

Asl

Chenar

et al. 2019

Polymers for Advanced Techs

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In this study, polysulfone/wood sawdust (PSf/WSD) mixed matrix membrane (MMM) was prepared as a novel substrate layer of thin‐film composite (TFC) membrane in water desalination. The main aim was to evaluate how different amounts of WSD (0‐5 wt%) and PSf concentrations (12‐16 wt%) in the porous substrate affect the properties of the final TFC membranes in the separation of organic and inorganic compounds. Morphological and wettability studies demonstrated that the addition of small amount of WSD (less than or equal to 1 wt%) in the casting solution resulted in more porous but similar hydrophobic substrates, while high loading (greater than or equal to 2 wt%) of WSD not only changed the substrate wettability and morphology but also increased and decreased the swelling and mechanical properties of substrate layer. Therefore, PA layer formed thereon displayed extensively varying film morphology, interfacial properties, and separation performance. Based on approximately stable permeate flux (ASPF) and apparent salt rejection efficiency (ASRE), the best TFC membrane was prepared over the substrate with 12 to 14 wt% of PSf and around 0.5 to 1 wt% of WSD. Although notable improvements in permeate flux were obtained by adding a small amount of sawdust, the results clearly indicate that the salt rejection mechanism of TFC membrane was different from the glycerin rejection mechanism. Furthermore, durability results of TFC membranes showed that in continuous operation for 30 days, TFC‐14/0.5 and TFC‐14/01 have the maximum plateau levels of stable permeate flux and salt rejection among the all TFC membranes.

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“…focused on the efforts to eliminate Hg 2+ ions in aqueous solutions via humic acid modified PANi nanocomposite whereas Eisazadeh et al. used PANi coated on rice husk ash for removal of Hg 2+ from aqueous media . Wang et al.…”

Section: Introductionmentioning

confidence: 99%

Sodium Dodecyl Sulfate Doped Polyaniline for Enhancing the Electrochemical Sensitivity of Mercury Ions

et al. 2016

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Polyaniline (PANi) was electro‐synthesized on the surface of screen‐printed carbon electrodes in the presence of sodium dodecyl sulfate (SDS) as a dopant. The complex of aniline and SDS created a conductive (PANi‐SDS) film at lower aniline concentration. The PANi‐SDS film contained negative charge due to the anionic head of SDS. The PANi‐SDS modified electrode was integrated into a poly(dimethylsiloxane) microfluidic chip as an electrochemical sensor for mercury detection. The presence of SDS in the polyaniline film enhanced the possibility of mercury ions uptake, and therefore, increased the peak current of square wave anodic stripping in the mercury detection. The mercury sensor exhibited a dynamic range from 6 to 35 nM with detection limit of 2.4 nM.

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Application of polyaniline nanocomposite coated on rice husk ash for removal of Hg(II) from aqueous media

Cited by 70 publications

References 25 publications

Generation of High Quality Biogenic Silica by Combustion of Rice Husk and Rice Straw Combined with Pre- and Post-Treatment Strategies—A Review

Generation of High Quality Biogenic Silica by Combustion of Rice Husk and Rice Straw Combined with Pre- and Post-Treatment Strategies—A Review

Performance enhancement of thin‐film composite membranes in water desalination process by wood sawdust

Sodium Dodecyl Sulfate Doped Polyaniline for Enhancing the Electrochemical Sensitivity of Mercury Ions

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