Heavy metal displacement in EDTA-assisted phytoremediation of biosolids soil

2006 ◽  
Vol 54 (5) ◽  
pp. 147-153 ◽  
Author(s):  
M.S. Liphadzi ◽  
M.B. Kirkham
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Chelating Agents ◽  
Chelating Agent ◽  
Drainage Water ◽  
Soil Drainage ◽  
Toxic Heavy Metals ◽  
Drinking Water Standards ◽  
Assisted Phytoremediation ◽  
Poplar Seedlings

Chelating agents are added to soil to solubilise the metals for enhanced phytoextraction. Yet no studies follow the displacement and leaching of heavy metals in soil with biosolids following solubilisation with chelates. The objective of this work was to determine the mobility of heavy metals in biosolids in a soil from a sludge farm that had received biosolids for 25 years. The soil was placed in columns in a greenhouse. Columns either had a plant (poplar) or no plant. After the poplar seedlings had grown for 144 d, the tetrasodium salt of the chelating agent EDTA was irrigated onto the surface of the soil at a rate of 1 g per kg of soil. Drainage water was analysed for three toxic heavy metals and four essential heavy metals. Without EDTA, concentrations of the seven heavy metals in the leachate from columns with or without plants were low or below detection limits. With or without plants, the EDTA mobilised all heavy metals and increased their concentration in drainage water. Without plants, the concentrations of Cd, Cu, Fe, and Zn in the leachate from columns with EDTA were above drinking-water standards. The presence of poplar plants in the soil reduced the concentrations of Cu, Fe, and Zn in the leachate so it fell within drinking-water standards. Concentrations of Cd and Pb in the leachate remained above drinking-water standards with or without plants.

scholarly journals Metalliferous content of drinking water and sediments in storage tanks of some schools in Erbil city, Iraq

2020 ◽  
Vol 9 (3) ◽  
Author(s):  
Hawraz Sami Khalid ◽  
Hoshyar Saadi Ali ◽  
Dhary Almashhadany
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Heavy Metal ◽  
Drinking Water ◽  
Water Samples ◽  
World Health ◽  
Storage Tanks ◽  
Quality Indices ◽  
Toxic Heavy Metals ◽  
Water Quality Indices

The present study was conducted to evaluate the quality of drinking water in randomly selected schools in Erbil city, Kurdistan Region, Iraq. The water quality indices such as the Heavy metal Pollution Index (HPI) and Heavy metal Evaluation Index (HEI) were applied to characterize water quality. Eighteen schools were incorporated and sampled for their water storage tanks available to students. Water samples and sediment samples from tanks floor were analyzed by Inductively Coupled Plasma Optical Emission Spectrometer for the determination of twenty-two metal elements. In drinking water samples, all detected metals did not exceed the permissible limits of the World Health Organization. The results of this study showed that the average values of HPI and HEI for As, Cd, Cr, Cu, Fe, Pb, Mn, Ni, and Zn were 54.442 and 0.221, respectively. According to data of the water quality indices, the schools drinking water quality are good and suitable for drinking in terms of heavy metals. However, sediments samples contained high concentrations of all elements including the toxic heavy metals (As, Cd, Cr, and Pb). Re-suspension of sediments into water column after refilling storage tanks can pose a serious threat to students drinking water from such vessels. It is therefore recommended that proper storage tanks are provided to the schools accompanied by continuous sanitation and hygiene practice to mitigate the corrosion of tanks to avoid health risks of toxic metal

Effect of EDTA and EDDS on Phytoremediation of Pb- and Zn- Contaminated Soil by Brassica Juncea

2012 ◽  
Vol 518-523 ◽  
pp. 5040-5046 ◽  
Author(s):  
Li Di Gao ◽  
Naoki Kano ◽  
Yuichi Sato ◽  
Shuang Zhang ◽  
Hiroshi Imaizumi
Keyword(s):  
Heavy Metals ◽  
Control System ◽  
Plant Growth ◽  
Brassica Juncea ◽  
Contaminated Soil ◽  
Chelating Agents ◽  
Environmental Control ◽  
Chelating Agent ◽  
Whole Plant ◽  
Biomass Loss

Effect of EDTA and EDDS on phytoremediation of Pb- and Zn- contaminated soil by Brassica Juncea was investigated in this work. Especially, the effect of the kind and the method of adding chelating agent was investigated during the plant growth. Plants were grown in an environmental control system. The biomass of the whole plant was weighed, and the uptake of Pb and Zn in shoot and root were determined using ICP-AES. Consequently, the following matters have been obtained: (1) Both EDTA and EDDS significantly enhanced the translocation of metals (Pb and Zn) in soil from root to shoot. Furthermore, the two chelating agents resulted in a sharply biomass loss for more than 30% of the control. As a result, the total uptake amount of metals by Brassica Juncea was decreased (except the uptake of Pb with the addition of 3.0 mmol•kg-1 EDTA). (2) EDDS showed the higher inhibition for the growth of Brassica Juncea than EDTA. (3) The method for adding EDTA and EDDS at several times separately did not necessarily increase the uptake of heavy metals.

scholarly journals Chelating agents to solubilize heavy metals from Oxisols contaminated by the addition of organic and inorganic residues

2009 ◽  
Vol 66 (1) ◽  
pp. 64-70 ◽  
Author(s):  
Aline Renée Coscione ◽  
Cleide Aparecida de Abreu ◽  
Gláucia Cecília Gabrielli dos Santos
Keyword(s):  
Heavy Metals ◽  
Iron Content ◽  
Chelating Agents ◽  
Chelating Agent ◽  
Soil Samples ◽  
Total Iron ◽  
Southeastern Brazil ◽  
Paulo State ◽  
Specific Metal ◽  
Metal Solubilization

Phytoremediation is an attractive technique for soils contaminated with heavy metals, especially in conjunction with chelating agents to assist metal phytoextraction. Nevertheless, their studies in Brazil are rare. Thus, the objective of the present work was to evaluate the efficiency of the chelating agents EDDS and EDTA for the solubilization of heavy metals from two Oxisols contaminated by organic sources in Jaguariúna (LVJ) and inorganic sources in Paulínia (LVP), São Paulo State, Southeastern Brazil. First, the soil samples were fractionated and the DTPA method was used to quantify heavy metals available forms. The results indicated that the metals were highly available in the soil fractions and could be solubilized by the chelating agents. The soil was suspended for 24 h in a chelating agent solution (EDTA or EDDS) at rates of 0, 250, 500 and 750 mg kg-1 of soil. The concentration of solubilized heavy metals was determined in the resulting solution. The extent of metal solubilization varied according to soil type, the chelating agent added and the specific metal. The amount of iron solubilized, as compared to the total iron (LVJ) was 11% (EDTA) and 19% (EDDS). EDDS solubilized more Cu than EDTA in both soils but more Ni in LVJ, while EDTA solubilized more Zn in both soils but more Cd in LVP. Both EDTA and EDDS may be useful for phytoextraction from soils, although the iron content is an important factor regarding the phytoextraction of heavy metals with chelating agents in Oxisols.

scholarly journals Effect of Low-Dose Exposure to Toxic Heavy Metals on The Reproductive Health of Rats A Multigenerational Study

2019 ◽  
Vol 63 (1) ◽  
pp. 64-71
Author(s):  
V. Doničová ◽  
A. Lukačínová ◽  
R. Beňačka ◽  
F. Ništiar
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Reproductive Success ◽  
Wistar Rats ◽  
Low Dose ◽  
Specific Effect ◽  
Control Group ◽  
Low Doses ◽  
Toxic Heavy Metals ◽  
F1 Generation

Abstract The aim of this investigation was to evaluate the effects of the exposure to low doses of lead, mercury and cadmium dissolved in drinking water (200× above maximal permissible dosage) on the reproductive potency of 200 Wistar rats (100 males and 100 females of F1 generation) and their progeny. Ten groups of rats were formed according to their exposure to heavy metals, including one control group without exposure. The females gave births between weeks 13 and 78 of the experiments. Reproduction parameters, such as number of litters, total number of newborns, number of newborns per litter, and number of weanlings were assessed weekly. The results demonstrated that the number of litters and newborns were higher after exposure to mercury and lower after exposure to lead. The number of weanlings and their share from newborns were the highest after exposure to cadmium and the lowest after exposure to mercury. A sex-specific effect of metals was related to the reproductive success.

Zero-wastewater capacitive deionization: selective removal of heavy metal ions in tap water assisted by phosphate ions

2019 ◽  
Vol 6 (11) ◽  
pp. 3225-3231 ◽  
Author(s):  
Xingkang Huang ◽  
Xiaoru Guo ◽  
Qianqian Dong ◽  
Lianjun Liu ◽  
Rebecca Tallon ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Drinking Water ◽  
Human Health ◽  
Heavy Metal Ions ◽  
Tap Water ◽  
Capacitive Deionization ◽  
Toxic Heavy Metals ◽  
Phosphate Ions ◽  
Novel Concept

Removing trace toxic heavy metals such as Pb2+ completely from drinking water while retaining beneficial ions such as Ca2+ and Mg2+ is important for protecting human health. A novel concept of zero-wastewater CDI is demonstrated to selectively remove lead ions against Ca2+ and Mg2+.

scholarly journals Jute: A Potential Candidate for Phytoremediation of Metals—A Review

Plants ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 258 ◽  
Author(s):  
Muhammad Hamzah Saleem ◽  
Shafaqat Ali ◽  
Muzammal Rehman ◽  
Mirza Hasanuzzaman ◽  
Muhammad Rizwan ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Chelating Agents ◽  
Morphological Characteristics ◽  
Leafy Vegetables ◽  
Toxic Substances ◽  
Potential Candidate ◽  
Toxic Heavy Metals ◽  
Corchorus Capsularis ◽  
Agricultural Regions

Jute (Corchorus capsularis) is a widely cultivated fibrous species with important physiological characteristics including biomass, a deep rooting system, and tolerance to metal stress. Furthermore, Corchorus species are indigenous leafy vegetables and show phytoremediation potential for different heavy metals. This species has been used for the phytoremediation of different toxic pollutants such as copper (Cu), cadmium (Cd), zinc (Zn), mercury (Hg) and lead (Pb). The current literature highlights the physiological and morphological characteristics of jute that are useful to achieve successful phytoremediation of different pollutants. The accumulation of these toxic heavy metals in agricultural regions initiates concerns regarding food safety and reductions in plant productivity and crop yield. We discuss some innovative approaches to increase jute phytoremediation using different chelating agents. There is a need to remediate soils contaminated with toxic substances, and phytoremediation is a cheap, effective, and in situ alternative, and jute can be used for this purpose.

scholarly journals The content of Pb, Zn and Cd in hydroameliorated soil and drainage water and their uptake by plants

2011 ◽  
Vol 48 (No. 9) ◽  
pp. 401-406
Author(s):  
I. Šimunić ◽  
F. Tomić ◽  
I. Kisić ◽  
M. Romić
Keyword(s):  
Heavy Metals ◽  
Plant Material ◽  
Surface Soil ◽  
Soil Layer ◽  
Water Concentration ◽  
Drainage Water ◽  
Trial Period ◽  
Soil Drainage ◽  
Average Value ◽  
Surface Soil Layer

The goal of the investigations was to assess the average contents of heavy metals (Pb, Zn and Cd) in the surface soil layer (0&ndash;30 cm), in drainage water and their uptake by growing plants, in the experimental amelioration field for four different variants of drainpipe spacing (15, 20, 25 and 30 m) during the three-year period. Maize and winter wheat were grown in all variants throughout the trial period. In all variants of drainpipe spacing, heavy metals in soil, drainage water and plant material were within the limits. The highest average level of Pb was 13.5 mg/kg, Zn 88 mg/kg&nbsp;and Cd 0.7 mg/kg&nbsp;in soil. Drainage water concentration of heavy metals was below 50&nbsp;&micro;g/dm<sup>3</sup>&nbsp;for Pb, below 2&nbsp;&micro;g/dm<sup>3</sup> for Cd, while the highest average value of Zn amounted to 20 &micro;g/dm<sup>3</sup>. In grain of the crops grown, the concentration of Pb was below 0.4 mg.kg&ndash;1&nbsp;and that of Cd below 0.1 mg/kg.

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