Preparation of chitosan crosslinked modified silicon material and its adsorption capability for chromium(VI)

Shi, Taihong; Yang, Dengfeng; Yang, Huizhu; Ye, Jinpeng; Cheng, Qiong

doi:10.1016/j.clay.2016.11.023

Cited by 49 publications

(12 citation statements)

References 21 publications

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“…These supporting materials generally have the merits of excellent water stability and high mechanical strength [91,92], making them invaluable to the adsorption process. Some are noted for their biodegradability, non-toxicity, abundant source, [86], an excellent affinity for HM [93], and are modification coats for metal NPs in preventing aggregation [83,84]. Notable organic supports for MSs includes biochar [88], chitosan [91], and carboxymethylcellulose CMC [92].…”

Section: Organic Supportmentioning

confidence: 99%

Aqueous Adsorption of Heavy Metals on Metal Sulfide Nanomaterials: Synthesis and Application

Kromah

Zhang

2021

Water

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Heavy metals pollution of aqueous solutions generates considerable concerns as they adversely impact the environment and health of humans. Among the remediation technologies, adsorption with metal sulfide nanomaterials has proven to be a promising strategy due to their cost-effective, environmentally friendly, surface modulational, and amenable properties. Their excellent adsorption characteristics are attributed to the inherently exposed sulfur atoms that interact with heavy metals through various processes. This work presents a comprehensive overview of the sequestration of heavy metals from water using metal sulfide nanomaterials. The common methods of synthesis, the structures, and the supports for metal sulfide nano-adsorbents are accentuated. The adsorption mechanisms and governing conditions and parameters are stressed. Practical heavy metal remediation application in aqueous media using metal sulfide nanomaterials is highlighted, and the existing research gaps are underscored.

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Section: Organic Supportmentioning

confidence: 99%

Aqueous Adsorption of Heavy Metals on Metal Sulfide Nanomaterials: Synthesis and Application

Kromah

Zhang

2021

Water

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“…Due to their high specic surface area, well-dened pore size and larger pore volume, mesoporous silica materials have been utilized as supports for numerous applications. [68][69][70] In earlier modications, silica particles were coated with synthetic polymers 70 or natural polymers like chitosan 145,146 in an adsor-bent1@adsorbent2 composition. Recent literature has revealed that the modications have advanced a step further, where preparation of adsorbent1@adsorbent2@adsorbent3 usually involves silica, polymer and a ligand or nanoparticles.…”

Section: àmentioning

confidence: 99%

Recent advances in hexavalent chromium removal from aqueous solutions by adsorptive methods

2019

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“…Additionally, high level of Cr (VI) in underwater sediments can lead to chromium pollution which can affect the fishes and benthos during anthropogenic activities, at which including dredging [15]. As stated in several environmental laws and regulations, the maximum permissible concentration of the chromium is 0.05 mg/L ( [19]; [23]). There are various techniques that have been implemented for metal recovery operations and water purification, for instance, electro-deposition, activated carbon, semiconductor-based photocatalysis, chemical precipitation, reverse osmosis, cementation, ion exchange, and adsorption [2].…”

Section: -mentioning

confidence: 99%

Polyvinyl Alcohol-Alginate Adsorbent Beads for Chromium (VI) Removal

Chuan¹,

Manap²,

Abdullah³

et al. 2018

IJET

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Chromium pollution has been an increasing concern worldwide because of its high toxicity and carcinogenic properties, and it requires an efficient purification technique. In this study, adsorbent beads containing polyvinyl alcohol (PVA) and sodium alginate were prepared by crosslinking with boric acid and calcium chloride for adsorbent of the hexavalent chromium [Cr (VI)]. Batch adsorption studies were conducted to evaluate Cr (VI) adsorption rates of PVA-alginate beads from aqueous solution under ultraviolet (UV) light illumination. The surface morphology and elemental composition of beads were examined using field emission scanning electron microscopy (FESEM) and energy dispersive spectrometer (EDS), respectively. This study revealed that the Cr (VI) adsorption rates increased remarkably with dosages of PVA and sodium alginate. This occurred mainly due to the increasing number of the active sites for adsorption. The results revealed that adsorbent beads with 12 g of PVA and 2.5 g sodium alginate beads exhibited superior Cr (VI) adsorption efficiency at which it is completely removed after 1.5 hours. The findings of this study indicate that PVA-sodium alginate beads are a viable option for Cr (VI) removal from industrial wastewater.

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Preparation of chitosan crosslinked modified silicon material and its adsorption capability for chromium(VI)

Cited by 49 publications

References 21 publications

Aqueous Adsorption of Heavy Metals on Metal Sulfide Nanomaterials: Synthesis and Application

Aqueous Adsorption of Heavy Metals on Metal Sulfide Nanomaterials: Synthesis and Application

Recent advances in hexavalent chromium removal from aqueous solutions by adsorptive methods

Polyvinyl Alcohol-Alginate Adsorbent Beads for Chromium (VI) Removal

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