کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5751823 1619710 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Long-term impact of primary domestic sewage on metal/loid accumulation in drainage ditch sediments, plants and water: Implications for phytoremediation and restoration
ترجمه فارسی عنوان
تأثیر طولانی مدت فاضلاب خانگی اولیه بر تجمع فلزات / لید در رسوبات گیاهان زهکشی، گیاهان و آب: تاثیرات فیزیکی و بازسازی
کلمات کلیدی
گیاه زهکشی گیاهی، فاضلاب داخلی درمان نشده، فلزات سنگین و فلزوئید، گیاهان غرق، فیزیوتراپی و ترمیم،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- Evaluation of possibilities for phytoextraction and phytostabilization in vegetated drainage ditch plant.
- Significant accumulation of metal/loid in ditch sediment to exceed legal background levels in soil.
- Metal/loid uptake and translocation in ditch plant biomass are limited.
- Seasonal patterns and time of maximum standing stock vary for each metal/loid.

We evaluate the long-term performance of a vegetated drainage ditch (VDD) treating domestic sewage with respect to heavy metal/metalloid (HM/M) accumulation in sediments, plants and water. VDD sediment contained significantly higher macro and trace elements compared to an agricultural ditch (AD) sediment. However, concentrations of HM/Ms in VDD sediment were below the ranges considered toxic to plants. Most HM/Ms were efficiently removed in the VDD, whereby removal efficiencies varied between 11% for Al and 89% for K. Accumulation of HM/Ms varied among species and plant parts, although sequestration by plants represents only a small proportion (< 1%) of the inflow load. Accumulation of Al, As, Cd, Pb, Cr, Fe and Ni in VDD plants were mostly distributed in the roots, indicating an exclusive strategy for metal tolerance. The opposite was found for Zn, Cu, K, Ca, P, K, Na, N and Mg, which were accumulated either in the stems or leaves. Overall, concentrations of metals in sediment showed significant positive correlations with those in ditch plants. None of the studied species were identified as metal hyper-accumulators (i.e. > 10,000 mg kg− 1 of Zn or Mn). Nevertheless, the high translocation factor (TF) values for Mn, Ni, Cu, Zn, Na, Mg, P, K and Ca in the ditch plants make them suitable for phytoextraction from water/soil, while the low TF values for Pb, Cd, As, Fe, Cr and Al make them suitable for their phytostabilization.

227

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 581–582, 1 March 2017, Pages 773-781
نویسندگان
, , , , ,