Inorganic foulants in membrane systems: chemical control strategies and the contribution of “green chemistry”

Demadis, Konstantinos D.; Neofotistou, Eleftheria; Mavredaki, Eleftheria; Tsiknakis, Michalis; Sarigiannidou, Eva-Maria; Katarachia, Stella D.

doi:10.1016/j.desal.2004.11.074

Cited by 92 publications

(63 citation statements)

References 16 publications

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“…It should be noted that the results obtained in the present investigation are consistent with previous published work on the performance of homopolymers of acrylamide and 2-ethyloxazoline (containing non-ionic (neutral charge) functional groups) [13,20]. It is worth noting that whereas homopolymer of 2-ethyloxazline exhibits poor performance as gypsum inhibitor, this polymer has been reported to show excellent performance for silica polymerization [21]. Thus, it is clear that performance of polymers strongly depends on the scaling system being inhibited.…”

Section: Homopolymerssupporting

confidence: 82%

Kinetic and morphological investigation of calcium sulfate dihydrate (gypsum) scale formation on heat exchanger surfaces in the presence of inhibitors

Amjad

2017

Int. J. Corros. Scale Inhib.

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The kinetics of calcium sulfate dihydrate (CaSO 4 ·2H 2 O, gypsum) scale formation on heated metal surface from aqueous solution has been studied by a highly reproducible technique. It has been observed that gypsum growth takes place directly on heated metal surface without any bulk or spontaneous precipitation in the supersaturated solution. A variety of maleic acid based polymers with different functional groups have been examined for their inhibitory effect on gypsum growth. The results indicate that amount of gypsum scale formed on heated metal surface is strongly affected by polymer dosage and the functional groups present in the polymer. Scanning electron microscopic investigations of the gypsum crystals grown in the presence of anionic polymeric additives show that structures of these crystals are highly modified. Results on the performance of various surfactants and biocides are presented.

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Section: Homopolymerssupporting

confidence: 82%

Kinetic and morphological investigation of calcium sulfate dihydrate (gypsum) scale formation on heat exchanger surfaces in the presence of inhibitors

Amjad

2017

Int. J. Corros. Scale Inhib.

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“…Increasing environmental concerns and discharge limitations have imposed additional challenges in treating process waters. Therefore, the discovery and successful application of chemical additives that have mild environmental impact has been the focus of several researchers [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Profound “turn-off” effects of anionic polymers on the inhibitory activity of cationic polyallylamine in the prevention of silica scale

Spinthaki¹,

Stathoulopoulou²,

Demadis

2015

Int. J. Corros. Scale Inhib.

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Colloidal/amorphous silica (SiO 2 nH 2 O, n is variable) is considered as the most undesirable inorganic precipitate that forms during various processes in silica-supersaturated industrial waters. In this paper we present how certain polymeric chemical additives can prevent silicic acid polymerization to form colloidal silica, which may lead to deposition onto industrial equipment. More specifically, stabilization of silicic acid is accomplished by using a cationic polymer, polyallylamine hydrochloride (PALAM), in supersaturated silica solutions (starting silica concentration in the form of silicate 500 ppm, or 8.3 mM sodium orthosilicate, Na 2 SiO 3 ·5H 2 O, expressed as SiO 2 ) at pH = 7. PALAM is a linear homopolymer that carries one amine side functional group every two carbon atoms, so it becomes protonated at circumneutral pH, rendering the molecule cationic. Its blends with anionic polymers such as carboxymethylinulin (CMI), poly(acrylamide-co-acrylic acid) (PAM-co-AA) and phosphonomethylated chitosan (PCH) are also studied for their silica scale inhibition efficiency.

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“…Além disso, esse jornal objetiva a publicação de pesquisas que discutem novos materiais de dessalinização, processos e tecnologias; consumo de energia, energia de fontes renováveis e valorização energética, pré-tratamento, pós-tratamento, sistemas integrados e analisa a regulamentação de plantas em larga escala. [43][44][45] Podemos citar também a revista Comptes Rendus Chimie cujas publicações se referem a pesquisas originais em todas as áreas da Química (orgânica, inorgânica, bio-orgânica, organometálicos, física do estado sólido, teórica etc..). 21,46,47 Enfim, a lista de realizações nos mais diversos aspectos da Química poderia continuar, conforme demonstram os demais artigos analisados.…”

Section: A Temática Química Verde Nos Periódicos Científicosunclassified

Vinte anos de química verde: conquistas e desafios

Farias¹,

Fávaro²

2011

Quím. Nova

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Inorganic foulants in membrane systems: chemical control strategies and the contribution of “green chemistry”

Cited by 92 publications

References 16 publications

Kinetic and morphological investigation of calcium sulfate dihydrate (gypsum) scale formation on heat exchanger surfaces in the presence of inhibitors

Kinetic and morphological investigation of calcium sulfate dihydrate (gypsum) scale formation on heat exchanger surfaces in the presence of inhibitors

Profound “turn-off” effects of anionic polymers on the inhibitory activity of cationic polyallylamine in the prevention of silica scale

Vinte anos de química verde: conquistas e desafios

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