Phytoremediation as a management option for contaminated sediments in tidal marshes, flood control areas and dredged sediment landfill sites

Bert, Valérie; Seuntjens, Piet; Dejonghe, Winnie; Lacherez, S.; Thủy, Hoàng Thị Thanh; Vandecasteele, Bart

doi:10.1007/s11356-009-0205-6

Cited by 89 publications

(46 citation statements)

References 123 publications

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“…It must be treated following 5 assuming that TOC and heavy metal concentrations are the same as in this study, while discharge is based on the data of population change and change of freshwater supply per capital in TLR system basin [15]. suitable guidelines for specific purpose, even treatment and reuse of heavily contaminated dredged sediments is not a cost-effective alternative to confined disposal [34], which becomes secondary source of contamination. Treatment technologies and experiences have never been put into consideration for sediment of TLR system in Hanoi, or even in the world for heavy metal contaminated sediment in general [35].…”

Section: Discussionmentioning

confidence: 99%

Does Embankment Improve Quality of a River? A Case Study in To Lich River Inner City Hanoi, with Special Reference to Heavy Metals

Thương¹,

Yoneda²,

Matsui³

2013

JEP

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To Lich River (TLR) system receives wastewaters from a population of nearly two million people and 100 manufactories of five industrial zones in inner city Hanoi, Vietnam. To improve quality of TLR, the embankment was carried out in 1998 and finished in 2002, resulted in width of 20 -45 m, depth of 2 -4 m, and maximum water flow capacity of 30 m 3 /s. Water and sediment quality indices based on heavy metal concentrations were used to evaluate current river environment compared to that of pre-embankment. Mass balance model was employed to estimate total metal loads for specific river reaches, which corresponds to various types of wastewater discharged along the river. The results indicated that currently there is about 284,000 m 3 sediment accumulated in TLR bed, which is under high contamination of Cr, Mn, Fe, Ni Cu, Zn, As, Cd, and Pb with a total of 7347 tons of all concerned metals. Domestic-discharged river reaches received much lower metal loads, roughly 8% -28% compared to river reaches of both domestic and industrial inputs. Total load of all nine concerned metals at the end of TLR is 161.7 kg/day, which is finally discharged to Nhue River at South Hanoi. Water quality was improved much right after finishing embankment, then it gradually deteriorated. Meanwhile, sediment quality became even much worse after embankment. Relative river quality index as equal weight for both water and sediment quality indices indicated that quality of TLR was not much improved after the embankment. It even became worse due to the urbanization in recent years.

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Section: Discussionmentioning

confidence: 99%

Does Embankment Improve Quality of a River? A Case Study in To Lich River Inner City Hanoi, with Special Reference to Heavy Metals

Thương¹,

Yoneda²,

Matsui³

2013

JEP

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“…It must be treated following suitable guidelines for specific purpose, even treatment and reuse of heavily contaminated dredged sediments is not a cost-effective alternative to confined disposal [17], which becomes secondary source of contamination. Treatment technologies and experiences have never been put into consideration for sediment of TLR system in Hanoi.…”

Section: Discussionmentioning

confidence: 99%

Initial improvement of a sewage system after embankment: a combined index of water and sediment quality

Thương¹,

Yoneda²,

Matsui³

2013

WIT Transactions on Ecology and the Environment

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To Lich River (TLR) system receives wastewaters from a population of nearly two million people and 99 manufacturers of five industrial zones in inner city Hanoi, Vietnam. To improve quality of TLR, the construction of an embankment has been carried out during the period 1998-2002. Water and sediment quality indices based on heavy metal concentrations were used to evaluate the current river environment compared to that of the pre-embankment. The mass balance model was employed to estimate total metal loads for specific river reaches, which correspond to various types of wastewater discharged along the river. The results indicated that domestic-discharged river reaches received much lower metal loads, roughly 8-28% compared to river reaches of both domestic and industrial inputs. Total load of all nine concerned metals (Cr, Mn, Fe, Ni Cu, Zn, As, Cd, and Pb) at the end of TLR is 161.7 kg/day. Water quality was improved after completion of the embankment, then it gradually deteriorated. Meanwhile, sediment quality became much worse after the embankment. Relative river quality index as an equal weight for both water and sediment quality indices indicated that quality of TLR was not much improved after the embankment. It even became worse due to urbanization in recent years. To improve quality of a sewage system, the embankment is not enough and is just an initial stage. The next stage which may become more important is a treatment plan to fully treat wastewater at sources following environmental standards before discharging to a sewage system.

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“…Improvements in reputation for industrial stakeholders implementing phytoremediation could also have a non-negligible value although this has not yet been assessed. Four different phytoremediation methods are usually considered: phytoextraction, rhizofi ltration, phytostabilisation and phytovolatilisation [13]. Yet the combination of phytoextraction and phytostabilisation showed the greatest potential [14][15][16].…”

Section: State Of the Art Methods To Reclaim Metal Contaminated Soilsmentioning

confidence: 99%

Chemical exploitation of metal contaminated biomass produced in phytoextraction

Losfeld¹,

Escande²,

Blache³

et al. 2014

Int. J. SDP

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This article describes some aspects of the chemical recovery of the metal contaminated biomass produced in phytoextraction technologies. Taking advantage of the adaptive capacity of certain plants to hyperaccumulate metallic cations in their aerial parts, phytoextraction could be a sustainable way to remediate trace metals pollution. A possible exploitation of the metal contaminated biomass produced in phytoextraction is the direct use of metallic cations derived from plants as Lewis acid catalysts for organic chemistry. These original polymetallic systems serve as heterogeneous catalysts in chemical transformations enabling the synthesis of molecules with high added value. Results for Friedel-Crafts acylations and alkylations are presented in this paper: the acetylation of anisole and benzylation reactions are considered in more detail. The use of mine tailings as catalytic supports is also investigated: it could represent a new integrated outlet for tailings and phytoextraction products. Each step of the process is designed to minimise environmental impacts in accord with the principles of Green Chemistry. The process seeks to be an incentive for the economic development of phytoextraction. As phytoremediation gains momentum, it could also prove a concrete solution to the criticality of non-renewable mineral materials with new sources of zinc, nickel and other metals.

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Phytoremediation as a management option for contaminated sediments in tidal marshes, flood control areas and dredged sediment landfill sites

Abstract: Phytoremediation is still an emerging technology that has to prove its sustainability at field scale. Research needs to focus on optimisations to enhance applicability and to address the economic feasibility of phytoremediation.

Cited by 89 publications

References 123 publications

Does Embankment Improve Quality of a River? A Case Study in To Lich River Inner City Hanoi, with Special Reference to Heavy Metals

Does Embankment Improve Quality of a River? A Case Study in To Lich River Inner City Hanoi, with Special Reference to Heavy Metals

Initial improvement of a sewage system after embankment: a combined index of water and sediment quality

Chemical exploitation of metal contaminated biomass produced in phytoextraction

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