کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6301955 1618026 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effects of chelates on soil microbial properties, plant growth and heavy metal accumulation in plants
ترجمه فارسی عنوان
اثر کلات بر خواص میکروبی خاک، رشد گیاه و تجمع فلزات سنگین در گیاهان
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک بوم شناسی، تکامل، رفتار و سامانه شناسی
چکیده انگلیسی
Although chelates can enhance remediation efficiency in phytoremediation, they can cause adverse ecosystem effects. The purpose of this research was to investigate the potential effects of chelating agents on plant and soil ecosystems. The effects of ethylene diamine tetraacetic acid (EDTA), ethylene diamine disuccinate (EDDS), and humic acids (HAs) on soil microbial properties, plant biomass, and metal accumulation were investigated in soils contaminated with Cd, Cu, Pb, Zn, and Ni. Four herbaceous plants were used for experimental purposes: Brassica juncea, Brassica campestris, Sorghum bicolor, and Helianthus annuus. EDTA was most effective for heavy metal uptake by plants, but had significant effects on plants and soils. Although EDDS addition can increase metal uptake, its effects are restricted to some plants and metal species. Plant selection can therefore be a more important factor than use of EDDS. HAs had limited influence on increases in heavy metal uptake but had favorable effects on plants and soil. Decreased plant biomass was strongly related to decreased chlorophyll content caused by increased metal concentrations in plant shoots. Results suggest that more efficient chelates may have higher toxicity. Long-term monitoring is therefore necessary to assess soil quality changes after the addition of chelating agents. Furthermore, the effects of the latter on ecosystems, as well as their metal removal efficiency, should be considered when selecting chelating agents for improved phytoremediation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecological Engineering - Volume 73, December 2014, Pages 386-394
نویسندگان
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