Adsorption affinity and selectivity of 3-ureidopropyltriethoxysilane grafted oil palm empty fruit bunches towards mercury ions

Kunjirama, Magendran; Saman, Norasikin; Johari, Khairiraihanna; Song, Shiow Tien; Kong, Helen; Cheu, Siew Chin; Lye, Jimmy Wei Ping; Mat, Hanapi

doi:10.1007/s11356-017-9117-z

Cited by 15 publications

(7 citation statements)

References 43 publications

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“…It is worth noting that most adsorption studies related to PW in this work reported kinetics being very well described by pseudo-second order model as illustrated in the following references: [37][38][39]. To state this decisively, studies compared the fit of pseudo-first/second order, Elovich or intraparticle diffusion models when applicable as shown in these examples: [40][41][42][43].…”

Section: Kineticsmentioning

confidence: 91%

“…The adsorbents were observed in the literature to be sourced from either agricultural practices or the food chain waste. From agricultural practices, Elsherif et al [84] and Kunjirama et al [43] groups investigated the usage of plant branches for the adsorption of heavy metals. As described earlier, heavy metals are potential contaminants of PW depending on the location its produced at.…”

Section: Bio-adsorbentsmentioning

confidence: 99%

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Adsorption as a Process for Produced Water Treatment: A Review

2020

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Produced water (PW) is a by-product of oil and gas operations, and its production is foreseen to increase in the upcoming years. Such an increase is justified by various entities through their projection of the expected increase in the demand of oil and gas. The treatment of produced water is a significantly growing challenge for the oil and gas industry that requires serious attention. The first part of this review will present the underlying issue of produced water and relevant practices. With adsorption being defined as the least expensive treatment method, the second part will introduce general adsorption principals. The third part will describe the recent applications of adsorption for the treatment of PW with more focus of categorizing the adsorbents as natural and non-natural adsorbents. The main aim of this review is to shed light on the recent research related to PW treatment using adsorption. This is performed to highlight the shortcomings in PW adsorption research and recommend research pathways that can help in developing the field further.

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Section: Kineticsmentioning

confidence: 91%

Section: Bio-adsorbentsmentioning

confidence: 99%

Adsorption as a Process for Produced Water Treatment: A Review

2020

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“…On the other hand, the extent of the metal ions adsorption was increased with the temperature and initial metal ions concentration. Alternatively, Kunjirama et al [41] carried out a study investigating the potential application of oil palm empty fruit bunches (OPEFB) as adsorbents to remove organic methylmercury, MeHg(II) and inorganic Hg(II) from aqueous solution. The OPEFB was functionalized with an amine-containing ligand namely 3-ureidopropyltriethoxysilane (UPTES) aiming for better adsorption performance towards both mercury ions.…”

Section: Bio-adsorbentsmentioning

confidence: 99%

A Review on Adsorption Process for the Treatment of Oily Wastewater

Teow¹,

Nordin²,

Juanda³

et al. 2023

Adv Environ Eng Res

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Oil-contaminated or oily wastewater (OW) is generated from various industrial and domestic premises. It consists of fats, oils, and greases and may contain petroleum fractions such as diesel oil, gasoline, and kerosene. It is regarded as one of the most hazardous wastewaters, causing serious environmental and health threats to ecosystems and human beings. The global increase in the discharge of OW coupled with stringent regulations for effluent discharge and incessant drive for the reuse of treated wastewater necessitate the need for the treatment of the OW. Conventional approaches employed in the past are inept for OW treatment due to low separation efficiency, high operational cost, creating secondary pollution, and long treatment hours. Comparatively, the adsorption process is considered a better alternative because of its simple design and can involve low investment in terms of both initial cost and land required. Thus, the adsorption process is widely applied as a promising alternative to existing treatment methods for OW. The adsorption process is an effective technique for OW treatment. Super adsorbents with ultrahigh adsorption capabilities are highly desired for efficient OW treatment in a new revolution of adsorption technology to meet present and future needs. This review provides insights into advanced and emerging state-of-the-art technologies of the adsorption process as a safe and efficient treatment of OW. Strength, weakness, opportunities and threats (SWOT) analysis was conducted to identify and analyze internal strengths and weaknesses and external opportunities and threats that shape the current and future operation of the adsorption process for the treatment of oily wastewater for developing strategic goals. Super adsorbents with ultrahigh adsorption capability such as P-GSC and P-PKS discussed are highly desired. The extraordinary properties of P-GSC and P-PKS can provide leap-forward opportunities to revolutionize traditional adsorption technology. However, scale-bridging and optimization study of these innovated super adsorbents is required for the real application. It shows a bright future of P-GSC and P-PKS towards OW treatment.

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“…The surface properties of SiO 2 layers can be affected by configuring siloxane layers with aminosilanes. ,− The performance of the siloxane layer is related to the properties of the amino groups. ,,, Among various aminosilanes, the ureido group contains two amines directly bonded to a carbonyl, with oxygen and nitrogen capable of donating lone-pair electrons. Such a structure enables it to possess a high number of hydrogen-bonding sites, facilitating the stable presence in the hot-concentrated PA solution and accessible adjacency to the silica surface for the ureidosilane. − This characteristic makes the ureidosilanes more attractive than other aminosilanes for silica surface silanization. Thus, ureidosilanes show the potential to inhibit the SiO 2 etching by forming siloxane layers on the surface to prohibit the etchant from be accessed.…”

Section: Introductionmentioning

confidence: 99%

Study on the SiO₂ Wet-Etching Mechanism Using γ-Ureidopropyltriethoxysilane as an Inhibitor for 3D NAND Fabrication

Zhou,

Han,

et al. 2024

ACS Appl. Electron. Mater.

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The SiO 2 layers, as the dielectric in the multistack storage cells of 3D NAND, are detrimentally dissolved by phosphoric acid (PA) during the selective Si 3 N 4 etching. The thinning of SiO 2 layers leads to the failure of subsequent processes; thus, an etching inhibitor for SiO 2 is crucial for 3D NAND fabrication. However, most inhibitors are currently limited to neutral or alkaline solutions. In this work, the γ-ureidopropyltriethoxysilane (UPTES), compatible with a hot-concentrated PA solution, was applied to the wet-etching process for the first time and exhibited an inhibitory effect on SiO 2 etching by retarding the etch rate over 60% without affecting the Si 3 N 4 etching. The saturation adsorption of UPTES on the SiO 2 substrate is confirmed to occur around the critical concentration, according to the Langmuir−Freundlich adsorption isotherm. The adsorption behavior of UPTES exhibits a reliance on its concentration. Around the critical concentration, the UPTES molecules chemisorb on the SiO 2 surface by Si−O−Si covalent bonds to form ordered UPTESsiloxane layers, avoiding contact between SiO 2 and the etchant; whereas oversaturated UPTES polymers physisorb not only on SiO 2 but also on Si 3 N 4 , impeding the Si 3 N 4 etching. This work contributes to a step forward in the effective wet-etching process in highdensity 3D NAND fabrication.

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Adsorption affinity and selectivity of 3-ureidopropyltriethoxysilane grafted oil palm empty fruit bunches towards mercury ions

Cited by 15 publications

References 43 publications

Adsorption as a Process for Produced Water Treatment: A Review

Adsorption as a Process for Produced Water Treatment: A Review

A Review on Adsorption Process for the Treatment of Oily Wastewater

Study on the SiO₂ Wet-Etching Mechanism Using γ-Ureidopropyltriethoxysilane as an Inhibitor for 3D NAND Fabrication

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Adsorption affinity and selectivity of 3-ureidopropyltriethoxysilane grafted oil palm empty fruit bunches towards mercury ions

Cited by 15 publications

References 43 publications

Adsorption as a Process for Produced Water Treatment: A Review

Adsorption as a Process for Produced Water Treatment: A Review

A Review on Adsorption Process for the Treatment of Oily Wastewater

Study on the SiO2 Wet-Etching Mechanism Using γ-Ureidopropyltriethoxysilane as an Inhibitor for 3D NAND Fabrication

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Product

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Study on the SiO₂ Wet-Etching Mechanism Using γ-Ureidopropyltriethoxysilane as an Inhibitor for 3D NAND Fabrication