effect of edta treatment method on leaching of pb and cr by phragmites australis (cav.) trin. ex steudel (common reed)

نویسندگان
چکیده

one of the major problems about the chelant-enhanced phytoextraction is the potential metal leaching associated with chelant application. a glasshouse pot experiment was conducted to investigate phytoextraction efficiency of common reed (phragmites australis (cav.) trin. ex steudel) for lead and chromium and to determine edta (ethylenediaminetetraacetic acid) enhancement of the mobility and phytoextraction of pb and cr and the potential for leaching of metals during the phytoextraction process. the results revealed that the bioconcentration factors of underground organs of the plant species were relatively higher than the bioconcentration factors of shoots and metals concentrations in the plant organs decreased in the order of root› rhizome› leave› stem. thus, p. australis would be applicable for pb and cr phytostabilization. addition of edta (0, 2.5, 5, 10 mmol.kg−1) to polluted pots with pb and cr significantly enhanced the mobility of soil metals and led to elevated soil solution concentrations of pb and cr. positive correlation coefficients were found between treatment time and heavy metals concentrations in the plant organs. optimum phytoextraction was observed when 5mmol kg−1 edta was added in single dosage, 60 days for pb and double dosage for cr, after the plant cultivation and, consequently, soil pb and cr concentration decreased with the passage of time. it can be concluded that p. australis can remediate pb-cr contaminated soils and edta had potential to promote the uptake of pb and cr for common reed, but with respect to its environmental leaching risk to ground waters, low dose should be used.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Effect of EDTA treatment method on leaching of Pb and Cr by Phragmites australis (Cav.) Trin. Ex Steudel (common reed)

One of the major problems about the chelant-enhanced phytoextraction is the potential metal leaching associated with chelant application. A glasshouse pot experiment was conducted to investigate phytoextraction efficiency of common reed (Phragmites australis (Cav.) Trin. ex Steudel) for Lead and Chromium and to determine EDTA (ethylenediaminetetraacetic acid) enhancement of the mobility and phy...

متن کامل

Interaction of cadmium with glutathione and photosynthesis in developing leaves and chloroplasts of Phragmites australis (Cav.) Trin. ex Steudel.

We investigated how the presence of cadmium (Cd) at the emergence of Phragmites australis Trin. (Cav.) ex Steudel plants from rhizomes interacted with leaf and chloroplast physiological and biochemical processes. About 8.5 nmol Cd mg-1 chlorophyll was found in leaves, and 0.83 nmol Cd mg-1 chlorophyll was found in chloroplasts of plants treated with 50 microm Cd. As a result, a 30% loss of chlo...

متن کامل

Rhizosphere effect and salinity competing to shape microbial communities in Phragmites australis (Cav.) Trin. ex-Steud.

Rhizobacterial communities associated with Phragmites australis (Cav.) Trin. ex Steud. in a hypersaline pond close to Wuliangsuhai Lake (Inner Mongolia - China) were investigated and compared with the microbial communities in bulk sediments of the same pond. Microbiological analyses have been done by automated ribosomal intergenic spacer analysis (ARISA) and partial 16S rRNA gene 454 pyrosequen...

متن کامل

photosynthetic responses in reed (phragmites australis (cav.) trin. ex steud.) seedlings induced by different salinity-alkalinity and nitrogen levels

many phragmites-dominated wetlands have been markedly salinized and alkalinized in the songnen plain, northeastern china. agricultural wastewater with high nitrogen content has been discharged into these alkalinized-salinized wetlands. to understand the effect of salinity-alkalinity on reed (phragmites australis) seedlings at various nitrogen levels, we examined photosynthesis rate, chlorophyll...

متن کامل

Response of Arbuscular Mycorrhizal Fungi to Hydrologic Gradients in the Rhizosphere of Phragmites australis (Cav.) Trin ex. Steudel Growing in the Sun Island Wetland

Within the rhizosphere, AM fungi are a sensitive variable to changes of botanic and environmental conditions, and they may interact with the biomass of plant and other microbes. During the vegetative period of the Phragmites australis growing in the Sun Island Wetland (SIW), the variations of AM fungi colonization were studied. Root samples of three hydrologic gradients generally showed AM fung...

متن کامل

Effect of Supplementing Common Reed (Phragmites australis) with Urea on Intake, Apparent Digestibility and Blood Metabolites of Baluchi Sheep

To evaluate the effects of treating or supplementing common reed (Phragmites australis) with 2% urea on intake, nutrient apparent digestibility, and blood metabolites, fifteen Baluchi rams (35.4±2.3 kg body weight) were used in a completely randomized design. Treatments were as follows: 1) common reed, 2) common reed supplemented with 2% urea solution at feeding, and 3) common reed tre...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
caspian journal of enviromental sciences

جلد ۱۳، شماره ۲، صفحات ۱۵۳-۱۶۶

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023