Porous PEI Coating for Copper Ion Storage and Its Controlled Electrochemical Release

Elmas, Sait; Gedefaw, Desta Antenehe; Larsson, Mikael; Yin, Yanting; Cavallaro, Alex; Andersson, Gunther G.; Nydén, Magnus; Andersson, Mats R.

doi:10.1002/adsu.201900123

Cited by 11 publications

(17 citation statements)

References 51 publications

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“…In such way, the antifouling action should be limited to the surfaces to be protected without leaching of biocides into the water column causing a minor impact on coastal ecosystems. An alternative system could be represented by electrochemical uptake and release of copper ions from natural seawater avoiding the continuous copper leaching from the matrix and minimising the environmental load of the biocide (Elmas et al 2020(Elmas et al , 2021.…”

Section: Discussionmentioning

confidence: 99%

Potential Disruptive Effects of Copper-Based Antifouling Paints On The Biodiversity of Coastal Macrofouling Communities

Cima¹,

Varello²

2021

Preprint

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In recent years, after the ban on tributyltin (TBT)-based antifouling paints, copper-based paints have become the main coatings for boat hulls due to their efficiency and endurance. Copper(I) compounds like Cu2O and CuSCN are used alone or in combination with booster biocides, i.e. Irgarol 1051, chlorothalonil and dichlofluanid. The expanded use of these paints has increased copper leaching into coastal environments, requiring attention and legislative restrictions for potential long-term effects on benthic populations. This study monitored the ecological succession of macrofouling communities on wooden and stainless steel panels immersed for 10 months in the southern basin of the Lagoon of Venice. The development of macrofouling communities on the panels coated with copper-containing antifouling paints was compared with those on the reference (uncoated) and TBT-coated panels. Series of biodiversity descriptors highlighted the preventing activity of the antifouling paints. The most active paints were those containing booster biocides and with self-polishing copolymers in the matrix. The macrofouling communities appeared dissimilar to those on the reference uncoated panels as regards the species richness, the coverage areas, and the biocoenosis structure. Generally, green algae, bryozoans and barnacles were the most tolerant taxa and a negative species selection occurred for sponges, serpulids and ascidians.

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Section: Discussionmentioning

confidence: 99%

Potential Disruptive Effects of Copper-Based Antifouling Paints On The Biodiversity of Coastal Macrofouling Communities

Cima¹,

Varello²

2021

Preprint

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“…The porous PEI coating can store and release ∼ 72 μgcm À 2 of Cu 2 + over multiple cycles by passing 1 mAcm À 2 current density through the electrode in artificial seawater. [13] The selective uptake of Cu 2 + ion by a mesoporous PEI film on diatomaceous earth particles and silicon substrates were also reported. [14] In this work dilute solutions of a high molecular weight PEI was crosslinked with glutaraldehyde and glyoxal to yield P1 and P2 as powder, respectively.…”

Section: Introductionmentioning

confidence: 96%

Glutaraldehyde and Glyoxal Crosslinked Polyethylenimine for Copper Ion Adsorption from Water

et al. 2022

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The water body can potentially be contaminated with heavy metals such as Cu2+ ions which beyond a certain concentration could impact human and animal health. In the past, different techniques have been developed to remove Cu2+ ions from water. In this study, polyethlenimine (PEI) was crosslinked with glutaraldehyde and glyoxal to yield three polymers (P1‐P3). P3 consists of hydroxypropyl methylcellulose (HPMC) as a template to decrease the size of the crosslinked polymer particles. The polymer powders were used to adsorb Cu2+ from CuSO4 water solutions. The addition of 50, 100 and 150 mg of P3 removed 25, 32 and 38 mg of Cu2+, respectively, from 0.075 M (10 mL) of CuSO4 solution, after stirring at room temperature for 24 h. In comparison, P1 and P2 removed a lower amount. The better performance of P3 arises from the larger surface area of the polymer powder compared to P1 and P2 as revealed from scanning electron microscopy (SEM) images. Kinetic studies indicated that the polymers remove a larger amount of Cu2+ during the first 3 h with a slower rate of adsorption continuing until 12 h. The adsorption kinetics were fitted with Elovich and Pseudo second order models to understand the adsorption mechanism. The higher R2 (∼0.99) value of the linear plots signifies the adsorption is likely to follow a Pseudo second order kinetics, with P3 showing a rate constant of 8.43x10−5 g mg−1 min−1. The Cu2+ loaded polymers (100 mg) were soaked in 10 mL of 2 % HNO3 for 24 h for the desorption of Cu2+, where 12, 10 and 16 mg of Cu2+ desorbed from P1, P2 and P3, respectively. This indicates the polymers could potentially be reused to adsorb another batch of Cu2+ from water to maximize an economic benefit.

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“…Active chlorine can be produced upon the aqueous dissolution of inorganic hypochlorite salts, photocatalytically on Ag@AgCl and TiO 2 photoelectrodes [5][6][7][8][9], or directly via generation of molecular chlorine (Cl 2 ) at an electrode-water interface [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Photometric Sensing of Active Chlorine, Total Chlorine, and pH on a Microfluidic Chip for Online Swimming Pool Monitoring

Elmas

Pospisilova

Sekulska

et al. 2020

Sensors

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A microfluidic sensor was studied for the photometric detection of active chlorine, total chlorine, and pH in swimming pool samples. The sensor consisted of a four-layer borosilicate glass chip, containing a microchannel network and a 2.2 mm path length, 1.7 mL optical cell. The chip was optimised to measure the bleaching of methyl orange and spectral changes in phenol red for quantitative chlorine (active and total) and pH measurements that were suited to swimming pool monitoring. Reagent consumption (60 mL per measurement) was minimised to allow for maintenance-free operation over a nominal summer season (3 months) with minimal waste. The chip was tested using samples from 12 domestic, public, and commercial swimming pools (indoor and outdoor), with results that compare favourably with commercial products (test strips and the N,N’-diethyl-p-phenylenediamine (DPD) method), precision pH electrodes, and iodometric titration.

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Porous PEI Coating for Copper Ion Storage and Its Controlled Electrochemical Release

Cited by 11 publications

References 51 publications

Potential Disruptive Effects of Copper-Based Antifouling Paints On The Biodiversity of Coastal Macrofouling Communities

Potential Disruptive Effects of Copper-Based Antifouling Paints On The Biodiversity of Coastal Macrofouling Communities

Glutaraldehyde and Glyoxal Crosslinked Polyethylenimine for Copper Ion Adsorption from Water

Photometric Sensing of Active Chlorine, Total Chlorine, and pH on a Microfluidic Chip for Online Swimming Pool Monitoring

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