Trace elements in road-deposited and waterbed sediments in Kogarah Bay, Sydney: enrichment, sources and fractionation

Nguyen, Thi Thanh Sang; Loganathan, P.; Nguyễn, Tiến Vinh; Pham, Thi Thu Nga; Kandasamy, Jaya; Wu, Michael C.; Naidu, Ravi; Vigneswaran, S.

doi:10.1071/sr14163

Cited by 6 publications

(9 citation statements)

References 54 publications

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“…Zeolite: The zeolite used in the study is a locally available material which exhibits good adsorption capacity towards heavy metals ((Nguyen et al 2015). The zeolite was sourced from a natural deposit at Werris Creek, New South Wales and supplied by Zeolite Australia Pty Ltd., Australia.…”

Section: Adsorbentsmentioning

confidence: 99%

“…The zeolite was sourced from a natural deposit at Werris Creek, New South Wales and supplied by Zeolite Australia Pty Ltd., Australia. The Brunauer-Emmett-Teller (BET) surface area of zeolite was 15.4 g/m 2 (Nguyen et al 2015). The zero point of charge (ZPC, the pH at which the net surface charge is zero) of zeolite was 2.2 (Nguyen et al 2015), suggesting that at the pH of most stormwaters (which is 6-7) the net surface charge on this material is negative and favourable for the adsorption of positively charged metals and ammonium.…”

Section: Adsorbentsmentioning

confidence: 99%

“…The Brunauer-Emmett-Teller (BET) surface area of zeolite was 15.4 g/m 2 (Nguyen et al 2015). The zero point of charge (ZPC, the pH at which the net surface charge is zero) of zeolite was 2.2 (Nguyen et al 2015), suggesting that at the pH of most stormwaters (which is 6-7) the net surface charge on this material is negative and favourable for the adsorption of positively charged metals and ammonium. The zeta potential value of zeolite is -17 mv at pH 6.5 (Nguyen et al 2015).…”

Section: Adsorbentsmentioning

confidence: 99%

“…Apart from the performance of R165, other filter media such as zeolite and granular activated carbon (GAC) were mixed in with R165 to evaluate if pollutant removal could be further improved. Zeolite is well known for removing specific types of heavy metals (Nguyen et al 2015) and ammonium (Cooney et al 1999a,b) by cation exchange mechanism (Wang and Peng 2010). GAC is one of the most abundant adsorbents commonly used in water treatment and very effective in removing a wide range of organic pollutants including polycyclic aromatic hydrocarbons (PAH) and heavy metals through hydrophobic and electrostatic interactions, hydrogen bonding and chelation mechanisms (Eeshwarasinghe et al 2018(Eeshwarasinghe et al , 2019Sounthararajah et al 2016;Valderrama et al 2008).…”

mentioning

confidence: 99%

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Enhanced Removal of Nutrients, Heavy Metals, and PAH from Synthetic Stormwater by Incorporating Different Adsorbents into a Filter Media

Ekanayake

Loganathan

Johir

et al. 2021

Water Air Soil Pollut

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Stormwater harvesting and reuse is an attractive option to lower the demand placed on other sources of water supply. However, it contains a wide range of pollutants that need to be removed before it can be reused or even discharged to the waterways and receiving waters. An experimental protocol to estimate the efficiency of a soilbased-filter medium for the treatment of stormwater pollutants from 1-3 years rainfall experienced in the field was developed using a laboratory column-set-up over short-term duration. The filter removed substantial amounts of PO 4 -P and NH 4 -N for up to 8 h at a flow velocity of 100 mm/h which is a one-year time-equivalent of rainfall at a locality in Sydney, Australia. An addition of 10% zeolite to the soil-based filter extended the column saturation period to 24 h. The breakthrough data for PO 4 -P and NH 4 -N were satisfactorily described by the Thomas model. The majority of the nine heavy metals tested were removed by more than 50% for up to 4 h in the soil-based filter. This level of removal increased to 16 h when 10% zeolite was added to the filter. The column with the soil-based filter + 10% zeolite had higher affinity for Pb, Cu, Zn and As than Ni, with Pb having the highest percentage removal. Soil-based filter + 10% zeolite removed considerable amounts of 3 polycyclic aromatic hydrocarbons (PAHs) (30-50%), while Soil-based filter + 10% zeolite + 0.3% granular activated carbon removed 65 to > 99% of the PAHs at 24 h operation.

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Section: Adsorbentsmentioning

confidence: 99%

Section: Adsorbentsmentioning

confidence: 99%

Section: Adsorbentsmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Enhanced Removal of Nutrients, Heavy Metals, and PAH from Synthetic Stormwater by Incorporating Different Adsorbents into a Filter Media

Ekanayake

Loganathan

Johir

et al. 2021

Water Air Soil Pollut

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“…Вказуються результати досліджень на різноманітних сорбентах органічного, неорганічного та біологічного походження [3,4]. Багато уваги приділено модифікації сорбентів [4,5]. Проте більшість досліджень мали статистичний характер і ставили за мету показати сорбційну ємність певного сорбенту щодо конкретного компонента (адсорбату).…”

Section: вступunclassified

Determination of Competitive Adsorption Regularities in Multicomponent Systems

Sabadash¹,

Гумницький²

2019

CTAS

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У роботі подано результати експериментальних досліджень адсорбції іонів Pb (ІІ) та Zn (II) з однокомпонентних розчинів за умови їх сумісної присутності. Встановлено, що в однокомпонентних розчинах сорбційна здатність цеоліту щодо Pb (ІІ) становила 0,39 мг-екв/дм 3 та Zn (II) 0,2 мг-екв/дм 3. У двокомпонентних розчинах, що містили іони Pb (ІІ) та Zn (II), відбувалося селективне вилучення Pb (ІІ). Сорбційна ємність цеоліту щодо іонів Pb (ІІ) у двокомпонентних розчинах зі збільшенням концентрації Zn (II) суттєво зменшувалася порівняно з однокомпонентними. Встановлено, що на селективність вилучення іонів важких металів з багатокомпонентних розчинів впливають: електронегативність, радіуси іонів та рН осадження відповідних гідроксидів металів. Ключові слова: конкуруюча адсорбція, важкі метали, цеоліт, багатокомпонентні системи, рівновага.

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Reduction of non-point source contaminants associated with road-deposited sediments by sweeping

Kim

Kang²,

2017

Environ Sci Pollut Res

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Road-deposited sediments (RDS) on an expressway, residual RDS collected after sweeping, and RDS removed by means of sweeping were analyzed to evaluate the degree to which sweeping removed various non-point source contaminants. The total RDS load was 393.1 ± 80.3 kg/km and the RDS, residual RDS, and swept RDS were all highly polluted with organics, nutrients, and metals. Among the metals studied, Cu, Zn, Pb, Ni, Ca, and Fe were significantly enriched, and most of the contaminants were associated with particles within the size range from 63 μm to 2 mm. Sweeping reduced RDS and its associated contaminants by 33.3-49.1% on average. We also measured the biological oxygen demand (BOD) of RDS in the present work, representing to our knowledge the first time that this has been done; we found that RDS contains a significant amount of biodegradable organics and that the reduction of BOD by sweeping was higher than that of other contaminants. Significant correlations were found between the contaminants measured, indicating that the organics and the metals originated from both exhaust and non-exhaust particles. Meanwhile, the concentrations of Cu and Ni were higher in 63 μm-2 mm particles than in smaller particles, suggesting that some metals in RDS likely exist intrinsically in particles, rather than only as adsorbates on particle surfaces. Overall, the results in this study showed that sweeping to collect RDS can be a good alternative for reduction of contaminants in runoff.

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Trace elements in road-deposited and waterbed sediments in Kogarah Bay, Sydney: enrichment, sources and fractionation

Cited by 6 publications

References 54 publications

Enhanced Removal of Nutrients, Heavy Metals, and PAH from Synthetic Stormwater by Incorporating Different Adsorbents into a Filter Media

Enhanced Removal of Nutrients, Heavy Metals, and PAH from Synthetic Stormwater by Incorporating Different Adsorbents into a Filter Media

Determination of Competitive Adsorption Regularities in Multicomponent Systems

Reduction of non-point source contaminants associated with road-deposited sediments by sweeping

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