Application of dopamine-modified halloysite nanotubes/PVDF blend membranes for direct dyes removal from wastewater
TL;DR: In this article, halloysite nanotubes (HNTs) were functionalized with dopamine firstly, and then a series of novel polyvinylidene fluoride (PVDF) membranes were prepared via blending with different dosages of DA grafted HNTs.
About: This article is published in Chemical Engineering Journal.The article was published on 2017-09-01. It has received 171 citations till now. The article focuses on the topics: Membrane & Polyvinylidene fluoride.
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TL;DR: In this article, a review of existing research papers on various biological, chemical and physical dye removal methods to find its efficiency through percentage of dye removal is presented, which highlights enzyme degradation and adsorption (physical) dye removal as these are known as one of the most efficient dye removal techniques these days.
Abstract: Dye effluents released from numerous dye-utilizing industries are harmful towards the environment and living things. Consequently, existence of dye effluent in environmental water bodies is becoming a growing concern to environmentalists and civilians. A long term sustainable and efficient dye effluent treatment method should be established to eliminate this issue. Dye wastewater should be treated first before release to minimize its negative impacts towards the environment and living things. However, due to lack of information on efficient dye removal methods, it is difficult to decide on a single technique that resolves the prevailing dye effluent issue. Therefore, this paper reviews existing research papers on various biological, chemical and physical dye removal methods to find its efficiency through percentage of dye removal. Although there are numerous existing tried and tested methods to accomplish dye removal, most of them have a common disadvantage which is the generation of secondary pollution to the environment. This paper highlights enzyme degradation (biological) and adsorption (physical) dye removal as these are known as one of the most efficient dye removal techniques these days. This paper also suggests the usage of a combined adsorbent as it is envisioned that this technique has better efficiency and is able to remove dyes at a faster rate.
1,186 citations
TL;DR: In this paper, the advantages and limitations of these techniques are discussed and reviewed based on a substantial number of up-to-date literatures, and the efforts made in the novel membrane development, feed water pretreatment, and membrane cleaning are highlighted.
317 citations
TL;DR: Of these methods, membrane-based separation processes (MBSPs) are effective over the conventional techniques for providing clean water from wastewater streams at an affordable cost with minimum energy requirement.
257 citations
TL;DR: In this paper, the core@double-shell structured magnetic halloysite nanotube nano-hybrid absorbent with target micro-structure and high efficiency removal capacity of dyestuffs was reported.
182 citations
TL;DR: The biological, environmental and catalytic applications of these surface modified HNTs with such versatile interface in the past two years have been elaborately discussed as well.
145 citations
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3,621 citations
TL;DR: From a comprehensive literature review, it was found that some LCAs, in addition to having wide availability, have fast kinetics and appreciable adsorption capacities too.
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TL;DR: A comprehensive overview of recent progress on the production and modification of polyvinylidene fluoride (PVDF) membranes for liquid-liquid or liquid-solid separation can be found in this article.
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TL;DR: An overview of recent progress on the application and modification of polyvinylidene fluoride (PVDF) membranes can be found in this article, where two major problems of PVDF membranes in applications, namely membrane fouling and membrane wetting, are comprehensively reviewed.
1,233 citations
TL;DR: In this paper, surface modification of natural halloysite clay nanotubes with γ-aminopropyltriethoxysilane (APTES) was investigated.
Abstract: Surface modification of natural halloysite clay nanotubes with γ-aminopropyltriethoxysilane (APTES) was investigated. Untreated and modified samples were characterized by nitrogen adsorption, X-ray diffraction, elemental analysis, thermogravimetry, transmission electron microscopy, atomic force microscopy, MAS nuclear magnetic resonance (29Si, 13C, 29Al), and Fourier transform infrared spectroscopy. The modification mechanism was found to include not only the direct grafting of APTES onto the hydroxyl groups of the internal walls, edges and external surfaces of the nanotubes but other processes in which oligomerized APTES condensed with the directly grafted APTES to form a cross-linked structure. The thermal and evacuation pretreatment conditions were found to play an important role in controlling the extent and mechanism of the modification. The extent of modification is also strongly affected by the morphological parameters of the original clay samples. This study demonstrates that the surface chemistry...
813 citations