Gary L. Amy Honored With 2017 A.P. Black Award

Amy, Gary L.; Mercer, Kenneth L.

doi:10.5942/jawwa.2017.109.0126

Cited by 5 publications

(4 citation statements)

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“…Arsenic is most effectively bound at a higher pH, even with established arsenic adsorbents . For example, Bayoxide E33, Granular Ferric Hydroxide, and MetSorb only adsorb 20, 40, and 10% arsenic at pH 6, respectively, while at pH 8, all three adsorb approximately 70% . Iron adsorption has been reported to be most favorable with porous materials like chitin and olive stones as pore size was found to have a significant impact on iron adsorption. − Thus, this supports the originally proposed adsorption mechanisms of d−π conjugation and polar adsorption as opposed to porous adsorption (Figure B).…”

Section: Resultssupporting

confidence: 65%

Regeneratable Graphene-Based Water Filters for Heavy Metal Removal at Home

2023

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At-home water filters for drinking water are used by over 100 million Americans. These filters are successful at removing heavy metals from drinking water; however, when heavy metals are present, filters can reach saturation quickly. This currently requires a full filter replacement; treating and regenerating (re-activating) the filter are not currently recommended by filter manufacturers. Here, we present a sustainable graphene-based water filter that can be regenerated by treatment with hot (80 °C) water or vinegar (mild acid). The filter has multiple desirable properties for heavy metal adsorption, including high surface area, conjugation, and oxygen-containing functional groups. This regeneratable filtration technology removes 3- to 65-fold more heavy metals (lead, cadmium, and mercury) from tap water than activated charcoal. Further, the filter can undergo a simple regeneration treatment, allowing for up to 3 cycles of reuse before metal breakthrough occurs. Due to the decreased frequency of filter replacement compared to current technologies, this graphene-based water filter could seamlessly integrate into existing at-home water filtration technologies, providing a more sustainable filter option.

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Section: Resultssupporting

confidence: 65%

Regeneratable Graphene-Based Water Filters for Heavy Metal Removal at Home

2023

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“…The applicability of ion exchange (IX) has been well-studied along with competing water constituents (e.g., SO 4 2– for IX) and regeneration requirements. 1 Magnetically impregnated ion-exchange (MIEX) has also been used as a medium for arsenic removal via ion exchange. Incorporating iron into the matrix combines favorable iron–arsenic interactions with the ionic exchange mechanisms.…”

Section: Technologies For Arsenic Removal From Drinking Watermentioning

confidence: 99%

Arsenic Contamination in Groundwater: Geochemical Basis of Treatment Technologies

et al. 2023

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Arsenic (As) is abundant in the environment and can be found in both organic (e.g., methylated) and inorganic (e.g., arsenate and arsenite) forms. The source of As in the environment is attributed to both natural reactions and anthropogenic activities. As can also be released naturally to groundwater through As-bearing minerals including arsenopyrites, realgar, and orpiment. Similarly, agricultural and industrial activities have elevated As levels in groundwater. High levels of As in groundwater pose serious health risks and have been regulated in many developed and developing countries. In particular, the presence of inorganic forms of As in drinking water sources gained widespread attention due to their cellular and enzyme disruption activities. The research community has primarily focused on reviewing the natural occurrence and mobilization of As. Yet, As originating from anthropogenic activities, its mobility, and potential treatment techniques have not been covered. This review summarizes the origin, geochemistry, occurrence, mobilization, microbial interaction of natural and anthropogenic-As, and common remediation technologies for As removal from groundwater. In addition, As remediation methods are critically evaluated in terms of practical applicability at drinking water treatment plants, knowledge gaps, and future research needs. Finally, perspectives on As removal technologies and associated implementation limitations in developing countries and small communities are discussed.

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“…The honeybee develops morphologically and physiologically according to the task it undertakes [10,39,26]. In a normal situation there is a correlation between the age of the honeybee and the task it performs [21,30,41,4]. This mechanism of behavioral development is called age-polyethism (or temporal polyethism).…”

Section: Social Inhibition In Honeybeesmentioning

confidence: 99%

From honeybees to robots and back: division of labour based on partitioning social inhibition

Zahadat

Hahshold²,

Thenius³

et al. 2015

Bioinspir. Biomim.

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In this paper, a distributed adaptive partitioning algorithm inspired by division of labor in honeybees is investigated for its applicability in a swarm of underwater robots in one hand and is qualitatively compared with the behavior of honeybee colonies on the other hand. The algorithm, partitioning social inhibition (PSI), is based on local interactions and uses a simple logic inspired from age-polyethism and task allocation in honeybee colonies. The algorithm is analyzed in simulation and is successfully applied here to partition a swarm of underwater robots into groups demonstrating its adaptivity to changes and applicability in real world systems. In a turn towards the inspiration origins of the algorithm, three honeybee colonies are then studied for age-polyethism behaviors and the results are contrasted with a simulated swarm running the PSI algorithm. Similar effects are detected in both the biological and simulated swarms suggesting biological plausibility of the mechanisms employed by the artificial system.

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Gary L. Amy Honored With 2017 A.P. Black Award

Cited by 5 publications

References 0 publications

Regeneratable Graphene-Based Water Filters for Heavy Metal Removal at Home

Regeneratable Graphene-Based Water Filters for Heavy Metal Removal at Home

Arsenic Contamination in Groundwater: Geochemical Basis of Treatment Technologies

From honeybees to robots and back: division of labour based on partitioning social inhibition

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