Risk assessment of marine environments from ballast water discharges with laboratory-scale hydroxyl radicals treatment in Tianjin Harbor, China

Zhang, Nahui; Zhang, Yubo; Bai, Mindong; Zhang, Zhitao; Cao, Chengyu; Meng, Xiangying

doi:10.1016/j.jenvman.2014.06.022

Cited by 9 publications

(1 citation statement)

References 12 publications

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“…In the present study, DBAN, MCAA, and DBAA have also been found to be potentially hazardous to the environment. Zhang et al (2014), who performed a risk assessment of marine environments for BWMSs, also reported that the PEC/PNEC ratio of MCAA exceeded 1. Woo et al (2002) analyzed 209 DBPs considered in a structure-relationship analysis (SRA) evaluation in relation to concerns about cancer; 20 of the DBPs were of priority concern, with a moderate or high-moderate rating.…”

Section: Discussionmentioning

confidence: 99%

Long-term Changes of Disinfection Byproducts in Treatment of Simulated Ballast Water

Jang

Cha

2020

Ocean Sci. J.

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This study investigated the changes in concentrations of haloacetic acids (HAAs) and haloacetonitriles (HANs) as disinfection byproducts (DBPs) for different storage times (as long as 20 days) and temperatures (5 to 20°C). A ship's voyage after treatment of its ballast water with active substances was considered. The HAA showed a clear trend of increasing concentration only with storage time, especially for dibromoacetic acid (DBAA). Dissolved organic nitrogen concentration was increased by the decomposition of dead organisms at 10 days, and then reacted with the remaining total residual oxidants, resulting in increased concentration of DBPs. An environmental risk assessment indicated that DBAN and monochloroacetic acid (MCAA) could have a negative impact on the marine environment. This study suggests that, because all international vessels must have a ballast water management system installed by September, 2024, the concentrations of DBPs, especially DBAN, MCAA, and DBAA, should be monitored in the waters at major international ports.

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Section: Discussionmentioning

confidence: 99%

Long-term Changes of Disinfection Byproducts in Treatment of Simulated Ballast Water

Jang

Cha

2020

Ocean Sci. J.

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Biological Invasions in Aquatic Ecosystems in China

Zhan

Xiong

et al. 2017

Biological Invasions and Its Management in China

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Biological efficacy and toxic effect of emergency water disinfection process based on advanced oxidation technology

Tian

Yuan

et al. 2015

Ecotoxicology

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An innovative and removable water treatment system consisted of strong electric field discharge and hydrodynamic cavitation based on advanced oxidation technologies was developed for reactive free radicals producing and waterborne pathogens eliminating in the present study. The biological efficacy and toxic effects of this advanced oxidation system were evaluated during water disinfection treatments. Bench tests were carried out with synthetic microbial-contaminated water, as well as source water in rainy season from a reservoir of Dalian city (Liaoning Province, China). Results showed that high inactivation efficiency of Escherichia coli (>5 log) could be obtained for synthetic contaminated water at a low concentration (0.5-0.7 mg L(-1)) of total oxidants in 3-10 s. The numbers of wild total bacteria (108 × 10(3) CFU mL(-1)) and total coliforms (260 × 10(2) MPN 100 mL(-1)) in source water greatly reduced to 50 and 0 CFU mL(-1) respectively after treated by the advanced oxidation system, which meet the microbiological standards of drinking water, and especially that the inactivation efficiency of total coliforms could reach 100%. Meanwhile, source water qualities were greatly improved during the disinfection processes. The values of UV254 in particular were significantly reduced (60-80%) by reactive free radicals. Moreover, the concentrations of possible disinfection by-products (formaldehyde and bromide) in treated water were lower than detection limits, indicating that there was no harmful effect on water after the treatments. These investigations are helpful for the ecotoxicological studies of advanced oxidation system in the treatments of chemical polluted water or waste water. The findings of this work suggest that the developed water treatment system is ideal in the acute phases of emergencies, which also could offer additional advantages over a wide range of applications in water pollution control.

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Risk assessment of marine environments from ballast water discharges with laboratory-scale hydroxyl radicals treatment in Tianjin Harbor, China

Cited by 9 publications

References 12 publications

Long-term Changes of Disinfection Byproducts in Treatment of Simulated Ballast Water

Long-term Changes of Disinfection Byproducts in Treatment of Simulated Ballast Water

Biological Invasions in Aquatic Ecosystems in China

Biological efficacy and toxic effect of emergency water disinfection process based on advanced oxidation technology

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