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首页> 外文期刊>Energy, Ecology and Environment >A comparative study of the effects of EDTA and citric acid on soil enzyme activities and growth performances of Talinum triangulare
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A comparative study of the effects of EDTA and citric acid on soil enzyme activities and growth performances of Talinum triangulare

机译：EDTA的影响的比较研究柠檬酸对土壤酶活性和增长表演的Talinum triangulare

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摘要

Ethylene diamine tetraacetic acid (EDTA) and citric acid are two different chelants that have been used in several studies to enhance the phytoremediation process. Though numerous reports are available to prove the efficacy of these chelants toward enhancing the metal uptake and translocation, there are very few studies focusing on the minimization of hazards posed by the chelants. EDTA is an effective synthetic chelant that aids phytoremediation, whereas citric acid, an organic chelant, poses minimum level of toxicity to the soil. Application of a single chelant may be effective for pollutant removal but poses toxic symptoms on the soil as well as plants at higher concentrations. Nevertheless, a combination of two different chelants may prove to be effective both in terms of pollutant removal and safety. This may be attributed to the alleviating effect of one chelant over the other, which needs further investigation. The number of reports on the combined treatment of chelants, their overall effects on plant growth and soil enzymes are also limited. The present study was conducted to evaluate the individual as well as the combined effects of EDTA and citric acid on the soil enzyme activities and plant growth parameters on Talinum triangulare. The soil was treated with chelants, and plants were grown over this soil for 50 days. Growth parameters such as leaf count, shoot length, root length and girth were analyzed. The activity of three soil enzymes-amylase, invertase and cellulase-was examined. The study revealed the toxicity of chelants themselves when used in excess. Though it was found that 250 mg kg(-1) concentration of EDTA has the best performance in terms of plant growth, it has been noticed that plant growth and soil enzymes were least affected at 500 mg kg(-1) concentration of mixed chelants.
机译：乙二胺四乙酸(EDTA)和柠檬酸是两个不同的螯合剂被用在一些研究提高植物修复过程。这些可以证明的有效性螯合剂对提高金属吸收易位,很少有研究关注所带来的危害最小化螯合剂。螯合剂,艾滋病植物修复,而柠檬酸、有机螯合剂,提出了最小值土壤的毒性水平。单一的螯合剂对污染物可能有效删除但姿势在土壤毒性症状在较高的浓度和植物。然而,两种不同的组合螯合剂可能被证明是有效的方面污染物的去除和安全。归因于的缓解效应螯合剂,这需要进一步调查。螯合剂的治疗相结合,他们的整体对植物生长和土壤酶也影响有限的。评估个人的总和EDTA和柠檬酸对土壤的影响酶活性和植物生长参数Talinum triangulare。螯合掩蔽剂,植物生长在这个土壤50天。数,拍摄长度、根长度和宽度分析。enzymes-amylase、蔗糖酶和cellulase-was检查。螯合掩蔽剂使用时超过。发现250毫克公斤(1)的浓度EDTA的植物具有最好的性能增长,它已经注意到植物的生长土壤酶是影响最小500毫克公斤(1)混合螯合剂的浓度。

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