Factors affecting the phytoaccumulation of weathered, soil-borne organic contaminants: analyses at the ex Planta and in Planta sides of the plant root

Mattina, MaryJane Incorvia; Berger, William; Eitzer, Brian D.

doi:10.1007/s11104-006-9182-4

Cited by 30 publications

(20 citation statements)

References 28 publications

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“…Along with subsequent biofilm growth, however, the nutrients attached to the surfaces of substrates could be degraded, absorbed and assimilated by microorganisms [33], and thus removals could increase and reach a stable level after period 4. In addition, nutrients uptake by plant [34] at the later stage could be brought about with the continuous growth of Canna indica L. The removal efficiencies remained stable and did not show obvious fluctuation, demonstrating that successful start-up had been achieved [35]. The start-up time of the two VFCW units was about five periods (45 days) under intermittent operation.…”

Section: System Start-upmentioning

confidence: 88%

Comparison of vertical-flow constructed wetlands with and without supplementary aeration treating decentralized domestic wastewater

Zhu

Takala

Hiltunen

et al. 2013

Environmental Technology

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Constructed wetlands (CWs) are efficient in reducing excessive contamination from wastewaters. However, oxygen inside CW beds is frequently low especially when substrate clogging problems appear after long-term operation, and this may become a limited factor for the treatment of wastewaters. Aimed at dealing with the issue of a low oxygen content in CW systems, two laboratory-scale vertical-flow constructed wetlands (VFCWs) with and without an aeration device (called VFCW-a and VFCW-c, respectively) were designed in this study to test the contribution of supplementary aeration to the treatment of decentralized domestic wastewater. Results showed that under the intermittent operation of about 45 days, two VFCW units were successfully started up by using activated sludge as seed sludge. Compared to VFCW-c, VFCW-a had a better resistance ability to organic shock loads and its removal function could be effectively recovered within a short period after the introduction of organic shock loads. Under intermittent operation with a 12 h idling time, the ideal hydraulic retention time (HRT) of VFCW-a was 42 h, about 6 h shorter than that of VFCW-c. Likewise, under intermittent operation with 42 h HRT, the ideal idling time of VFCW-a was 12 h, still about 6 h shorter than that of VFCW-c. Under intermittent operation with HRT-42 h and an idling time of 12 h, SS, COD, TN and TP removal efficiencies in VFCW-a could reach 81.2%, 85%, 89.9% and 77.9%, respectively. The VFCW unit with supplementary aeration is an efficient innovation for the treatment of decentralized domestic wastewater.

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Section: System Start-upmentioning

confidence: 88%

Comparison of vertical-flow constructed wetlands with and without supplementary aeration treating decentralized domestic wastewater

Zhu

Takala

Hiltunen

et al. 2013

Environmental Technology

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“…Although no differences in the root concentrations of POPs were observed between Cucurbitaceae and Poaceae, significant differences were found in their shoots (Lunney et al, 2004). Another study found that the accumulation profiles of chlordane in scions of cucumber were reflected by the uptake ability of rootstocks of C. pepo (Mattina et al, 2007). Therefore, xylem sap is thought to be the primary pathway for POP translocation.…”

Section: Discussionmentioning

confidence: 95%

A Major Latex-Like Protein Is a Key Factor in Crop Contamination by Persistent Organic Pollutants

et al. 2013

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This is the first report, to our knowledge, to reveal important factors by which members of the Cucurbitaceae family, such as cucumber (Cucumis sativus), watermelon (Citrullus lanatus), melon (Cucumis melo), pumpkin (Cucurbita pepo), squash (C. pepo), and zucchini (C. pepo), are selectively polluted with highly toxic hydrophobic contaminants, including organochlorine insecticides and dioxins. Xylem sap of C. pepo ssp. pepo, which is a high accumulator of hydrophobic compounds, solubilized the hydrophobic compound pyrene into the aqueous phase via some protein(s). Sodium dodecyl sulfate-polyacrylamide gel electrophoresis of xylem sap of two C. pepo subspecies revealed that the amount of 17-kD proteins in C. pepo ssp. pepo was larger than that in C. pepo ssp. ovifera, a low accumulator, suggesting that these proteins may be related to the translocation of hydrophobic compounds. The protein bands at 17 kD contained major latex-like proteins (MLPs), and the corresponding genes MLP-PG1, MLP-GR1, and MLP-GR3 were cloned from the C. pepo cultivars Patty Green and Gold Rush. Expression of the MLP-GR3 gene in C. pepo cultivars was positively correlated with the band intensity of 17-kD proteins and bioconcentration factors toward dioxins and dioxin-like compounds. Recombinant MLP-GR3 bound polychlorinated biphenyls immobilized on magnetic beads, whereas recombinant MLP-PG1 and MLP-GR1 did not. These results indicate that the high expression of MLP-GR3 in C. pepo ssp. pepo plants and the existence of MLP-GR3 in their xylem sap are related to the efficient translocation of hydrophobic contaminants. These findings should be useful for decreasing the contamination of fruit of the Cucurbitaceae family as well as the phytoremediation of hydrophobic contaminants.

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“…The Lindane (c-HCH) insecticide level increased from 3.1 lgkg -1 in soil, to 3.3 lgkg -1 in roots and to 3.9 lgkg -1 in carrot leaves. The non-significant differences (p [ 0.05) observed between mean concentrations of Lindane signified the presence of its residues in cultivated soils, its absorption across the root lipid bilayer, its route through transmembrane channels in growing roots and the uniform redistribution of these residues within the plant (Mattina et al 2000(Mattina et al , 2007. Among the DDTs, the limited size of these residues was seen in pp 0 DDE: 5.3 lgkg -1 in soil, 5.5 lgkg -1 in carrot root and 8.2 lgkg -1 in carrot leaf samples.…”

Section: Resultsmentioning

confidence: 99%

DDT and HCH Isomer Levels in Soils, Carrot Root and Carrot Leaf Samples

Waliszewski

Carvajal

Gómez‐Arroyo

et al. 2008

Bull Environ Contam Toxicol

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Agricultural cultivation assists organochlorine pesticide migration from contaminated soils to growing plants. This phenomenon is caused by retention processes that modify volatile pesticide exchange between soil, air and plants. The aim of the study was to monitor organochlorine pesticide (HCB, alpha- and gamma-HCH, pp'DDE, op'DDT, pp'DDT) levels and compare these concentrations in soil, carrot roots and carrot leaves. Fifty soil samples, 50 carrot root and 50 carrot leaf samples were taken from the same fields and analyzed by GLC-ECD. The results reveal organochlorine pesticide diffusion from agricultural soils to growing carrot plants and their vapors adsorption by leaves. Within the carrot plant, organochlorine pesticides accumulate especially in carrot root peel, 3-7 times more than in root flesh.

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Factors affecting the phytoaccumulation of weathered, soil-borne organic contaminants: analyses at the ex Planta and in Planta sides of the plant root

Cited by 30 publications

References 28 publications

Comparison of vertical-flow constructed wetlands with and without supplementary aeration treating decentralized domestic wastewater

Comparison of vertical-flow constructed wetlands with and without supplementary aeration treating decentralized domestic wastewater

A Major Latex-Like Protein Is a Key Factor in Crop Contamination by Persistent Organic Pollutants

DDT and HCH Isomer Levels in Soils, Carrot Root and Carrot Leaf Samples

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