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Ryon, M.G.; Stewart, Arthur J.; Kszos, L.A.; Phipps, T.L.

doi:10.1023/a:1015264509699

Cited by 20 publications

(6 citation statements)

References 9 publications

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“…The study evaluates the environmental impact of using sulfur-based dechlorinating agents, both sodium bisulfate and sodium thiosulfate, to industrial wastewater treatment, causing mass mortality of up to >24,000 fish. The report also confirms that under overfeed conditions and the presence of bacteria capable of metabolizing several sulfur-based agents reduces acidity and dissolved oxygen concentrations [15]. Another study indicated that the histological results show hyperplasia of catfish (Ictalurus punctatus) gills found in urban waterways.…”

Section: Resultssupporting

confidence: 71%

Mass tilapia (Oreochromis mossambicus) mortality in floating net cages at Batur Lake, Bangli Regency, Bali Province: a case report

Wiradana¹,

Yudha

Mukti

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The mass death of tilapia (Oreochromis mossambicus) is the cause of the outbreak of mass death of cultured fish in floating net cages in Batur Lake, Bangli, Bali. The data were collected employing a field survey as material for formulating countermeasures. The sampling area is the Batur Lake, Bangli area, the center for tilapia cultivation in Bali Province. The results of our field investigation show that the upwelling phenomenon caused the cause of the mass death that occurred. The incident happened at the beginning of August, which began with changes in water temperature and wind direction (wind-driven motion). Changes in water temperature cause a mass of nutrient-rich water to move to the lake's surface, thereby reducing dissolved oxygen (DO) levels, which are contained in the water. The high stocking density and accumulation of nutrients from agricultural and anthropogenic activities are the main factors for this outbreak. With this outbreak of mass mortality of cultured fish, the government and relevant authorities are expected to manage the health of the aquaculture environment wisely and issue circulars regarding this case, especially in the center of tilapia cultivation in Batur Lake.

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Section: Resultssupporting

confidence: 71%

Mass tilapia (Oreochromis mossambicus) mortality in floating net cages at Batur Lake, Bangli Regency, Bali Province: a case report

Wiradana¹,

Yudha

Mukti

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Ohara et al (2020) reported that SBS had a strong bactericidal effect at pH 4.6. This is supported by other studies which concluded the efficacy of SBS increased in acidic conditions (Penna et al 2002;Ryon et al 2002;Murano et al 2005). The effect of temperature on the efficacy of SBS was not found in the literature.…”

Section: Mechanisms Of Actionsupporting

confidence: 72%

“…In RO applications, overdosing SBS may pose an environmental hazard as excess levels of SBS in either the concentrate or permeate will scavenge oxygen when distributed to receiving waters. The environmental hazard of SBS was reported by Ryon et al (2002), who studied the impact on streams from the use of SBS as a dechlorinating agent. The study concluded that inaccurate dosing or overfeed of SBS can create an excess of sulfite in receiving waters, potentially leading to decreases in pH and dissolved oxygen, and causing mortality in fish.…”

Section: Human and Environmental Health Hazardsmentioning

confidence: 99%

“…Methods for monitoring SBS dosage, other than monitoring the pH of the feed water and biocide solution, were not found in the literature. Overdosing SBS will potentially cause a higher residual concentration in the permeate stream, decreasing pH and dissolved oxygen content thus posing a threat to aquatic life, or killing gastrointestinal bacteria after human consumption (Ryon et al 2002;Irwin et al 2017). As a result, treatment with SBS requires off-line dosing in potable water applications and careful monitoring of permeate and concentrate quality when distributing water to sensitive aquatic environments.…”

Section: Advantages and Limitationsmentioning

confidence: 99%

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The application of non-oxidizing biocides to prevent biofouling in reverse osmosis polyamide membrane systems: a review

Da-Silva-Correa

Smith

Thibodeau

et al. 2022

Journal of Water Supply: Research and Technology-Aqua

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Biofouling of polyamide membranes is one of the main barriers faced by reverse osmosis (RO) technologies to supply fresh water. Currently, biofouling is addressed by feed water pretreatment using chlorine, followed by membrane cleaning. Chlorine damages polyamide membranes and also generates harmful disinfection byproducts. Thus, safer strategies are needed to prevent biofouling in polyamide membrane systems. This review investigates the applicability of the following non-oxidizing biocides in preventing and controlling biofouling in RO systems, including their antimicrobial efficiency, hazard levels, membrane compatibility, and applicability to drinking water treatment: (1) 2,2-dibromo-3-nitropropionamide (DBNPA); (2) 2-methyl-4-isothiazolin-3-one (MIT); (3) sodium bisulfite (SBS), (4) phenoxyethanol (PE), (5) sodium benzoate (SB). According to this review, MIT and DBNPA present most of the features attributed to an ideal anti-biofouling chemical but also are the most hazardous biocides. Due to safety and efficacy, none of the five chemicals were determined to be the final solution to address membrane biofouling. However, alternative RO biocide research is in early development and requires further investigation via biofouling prevention studies. Therefore, future research efforts on the investigation of economic, eco-friendly, and safe antifouling agents to prevent and treat biofouling in RO systems are paramount to promote sustainable water supply in water-stressed countries.

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“…Contamination of freshwater with natural and synthetic chemicals is a global environmental challenge (1). Of particular concern are chemicals that affect vertebrate reproduction and inorganic compounds that stimulate microbial blooms, as both can have severe ecological impacts when they enter the environment (2)(3)(4). Because chemical releases can be dynamic and transient, there is a need to sense these chemicals in situ, in real time (4).…”

Section: Main Textmentioning

confidence: 99%

Real-time bioelectronic sensing of environmental contaminants

Atkinson

Zhang

et al. 2022

Nature

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Real-time chemical sensing is needed to counter the global threats posed by pollution.We combine synthetic biology and materials engineering to develop a living bioelectronic sensor platform with minute detection times. Escherichia coli was programmed to reduce an electrode in a chemical-dependent manner using a modular, eight-component, synthetic electron transport chain. This strain produced significantly more current upon exposure to thiosulfate, an anion that causes microbial blooms.Incorporating a protein switch into the synthetic pathway and encapsulation of microbes with electrodes and conductive nanomaterials yielded a living bioelectronic sensor that

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Cited by 20 publications

References 9 publications

Mass tilapia (Oreochromis mossambicus) mortality in floating net cages at Batur Lake, Bangli Regency, Bali Province: a case report

Mass tilapia (Oreochromis mossambicus) mortality in floating net cages at Batur Lake, Bangli Regency, Bali Province: a case report

The application of non-oxidizing biocides to prevent biofouling in reverse osmosis polyamide membrane systems: a review

Real-time bioelectronic sensing of environmental contaminants

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