Remediation of Lead-, Zinc- and Cadmium-contaminated Soils

1997 ◽  
pp. 91-102 ◽  
Author(s):  
Michael Lambert ◽  
Gary Pierzynski ◽  
Larry Erickson ◽  
Jerry Schnoor
Keyword(s):  
Contaminated Soils ◽  
Lead Zinc

scholarly journals Limits of seed germination of phytomeliorants under conditions of heavy metals toxic concentrations

2019 ◽  
Vol 8 (1) ◽  
pp. 82-86
Author(s):  
Anastasia Olegovna Oznobihina
Keyword(s):  
Heavy Metal ◽  
Contaminated Soils ◽  
Experimental Studies ◽  
Threshold Concentration ◽  
Leguminous Plant ◽  
Critical Threshold ◽  
Toxic Agent ◽  
Germination Energy ◽  
Lead Zinc ◽  
The Impact

The aim of the study is to conduct biological testing at the initial stages of plant objects viability in the model conditions of heavy metal pollution. The paper presents the results of laboratory experiments to assess the impact of different concentrations of heavy metal salts on the viability of yellow melilot and great trefoil seeds. In the course of the conducted experimental studies the author has been established a direct dependence of the decrease in the indices of germination energy and laboratory germination of seeds with an increase in the concentration of phytotoxicant salts, determined the critical (threshold) concentration of the studied elements and the metal content, in which the processes of growth and development of seeds remain. The concentration of 0,01% cadmium, zinc, lead and copper was optimal for germination of melilot seeds, where germination was equal to 80%, 74%, 69% and 64%, respectively. For great trefoil seeds, high germination rates were noted in case of 0,01% contamination with lead, zinc, cadmium and copper - 82%, 80%, 77% and 76%, respectively, and in 0,1% salt solution of lead, copper and zinc there were recorded 75%, 74% and 72% of seedlings. Zinc in the concentration of 0,01% at the initial stages of germination of phytomeliorant seeds stimulated germination energy. The tendency of resistance to pollution by lead, zinc and copper was observed at sprouts of a great trefoil, and to pollution by cadmium the greatest resistance was shown by a melilot yellow. Defining the limits of the leguminous plant seeds germination in the presence of a toxic agent will allow research and development in respect of biological restoration of contaminated soils and can be used in technologically disturbed lands.

scholarly journals Characteristics and Risk Assessment of Soil Polluted by Lead around Various Metal Mines in China

2021 ◽  
Vol 18 (9) ◽  
pp. 4598
Author(s):  
Jing Shi ◽  
Ping Du ◽  
Huilong Luo ◽  
Juan Chen ◽  
Yunhui Zhang ◽  
...  
Keyword(s):  
Contaminated Soils ◽  
Temporal Variations ◽  
Mean Value ◽  
Pollutant Emission ◽  
Mining Areas ◽  
Metal Mines ◽  
Central Regions ◽  
Lead Zinc ◽  
Ecological Risk Assessments ◽  
Pb Concentration

The contamination of soil by lead (Pb) is a serious and widespread problem in China, especially in mining areas. This paper summarized the available data regarding Pb-contaminated soils around various metal mines in China. Based on these data, the Pb concentration in the soil and its temporal and spatial changes were analyzed. Potential ecological hazards and adult lead models were also used to estimate ecological and health risks. The results indicated that the concentration of Pb was closely related with the type of mine. Compared with other types of mine, soil around lead-zinc (Pb-Zn) and tin (Sn) mines with high Pb contents in the metallic ores and high pollutant emission coefficient were more strongly polluted by Pb. The characteristic spatial and temporal variations of Pb pollution status in China were clarified, and the results showed that the concentration was high in the southern, southwestern, and central regions of China where many mining areas were located, and the mean value passed a turning point in 2012. Ecological risk assessments indicated that some areas around mines were at considerable to high risk, and the risk was relatively severe in Pb-Zn mining areas. According to the adult lead model, Pb-Zn mines had a greater impact on blood Pb concentration than the other types of mine.

Removal of lead, zinc and cadmium from contaminated soils with two plant extracts: Mechanism and potential risks

2020 ◽  
Vol 187 ◽  
pp. 109829
Author(s):  
Can Feng ◽  
Yue Chen ◽  
Shirong Zhang ◽  
Guiyin Wang ◽  
Qinmei Zhong ◽  
...  
Keyword(s):  
Plant Extracts ◽  
Contaminated Soils ◽  
Lead Zinc ◽  
Potential Risks

Comparison of Hydroxyapatite Sorption Properties towards Cadmium, Lead, Zinc and Strontium Ions

2005 ◽  
Vol 494 ◽  
pp. 405-410 ◽  
Author(s):  
I. Smičiklas ◽  
A. Onjia ◽  
J. Marković ◽  
S. Raičević
Keyword(s):  
Heavy Metal ◽  
Contaminated Soils ◽  
Ph Values ◽  
Surface Areas ◽  
Initial Ph ◽  
Heavy Metal Immobilization ◽  
Lead Zinc ◽  
Synthetic Hydroxyapatite ◽  
Cadmium Lead ◽  
Solid Liquid

Apatites are well known matrix for heavy metal immobilization and remediation of ground water and contaminated soils. In this work, capacities of different synthetic hydroxyapatite (HAP) samples for Pb, Cd, Sr and Zn sorption were analyzed, from single metal solutions and their equimolar mixture. Initial concentration of each metal in single metal solutions and total metal concentration in the mixture was 10-2 mol/dm3. Initial pH was adjusted to 5.0 ± 0.1. After 24 h equilibration of HAP samples with heavy metal solutions (solid/liquid ratio 1:200), the concentration of metals and of Ca2+ released from crystal lattice, as well as the final pH values were measured. The selectivity of all samples, regardless of the differences in their compositions, crystallinities, specific surface areas, points of zero charge and sorption capacities, was as follows: Pb > Cd > Zn > Sr. The same order was obtained for both single metal solutions and their mixture. In all cases, the sorption was followed by a decrease in final pH values, which are lower than the pHPZC values obtained by equilibration of HAP samples with an inert electrolyte (KNO3). A linear relationship between the amount of metals sorbed and Ca2+ released from HAP was observed. Also, a correlation between sorption capacities and physicochemical properties of HAP samples was found.

Remediation of lead-, zinc- and cadmium-contaminated soils

2007 ◽  
pp. 91-102 ◽  
Author(s):  
Michael Lambert ◽  
Gary Pierzynski ◽  
Larry Erickson ◽  
Jerry Schnoor
Keyword(s):  
Contaminated Soils ◽  
Lead Zinc

Heavy metal content of plants growing on soils contaminated by lead mining

1971 ◽  
Vol 76 (2) ◽  
pp. 321-323 ◽  
Author(s):  
B. J. Alloway ◽  
B. E. Davies
Keyword(s):  
Heavy Metal ◽  
Contaminated Soils ◽  
Metal Content ◽  
Plant Composition ◽  
Soil Extraction ◽  
Metal Compounds ◽  
Lead And Zinc ◽  
Lead Zinc ◽  
High Concentrations ◽  
Copper Ores

During the nineteenth century several parts of Wales were intensively mined for lead, zinc and copper ores. Fields adjacent to and downstream from the mines became contaminated by air- and water-borne heavy metal compounds. Such fields still contain high concentrations of total lead, zinc and copper together with silver and cadmium, the chief ‘guest’ elements in lead and zinc ores. Extraction of the soils with dilute acetic acid suggested that contaminated soils contained more of these metals that were available to plants (Alloway, 1969; Alloway & Davies, 1971). Some studies of plant composition were made to confirm the evidence from soil extraction and to indicate the extent to which these metals were entering the food chain.

In-Situ Remediation of Lead–Zinc Polymetallic Mine Contaminated Soils by MnFe2O4Microparticles

2016 ◽  
Vol 25 (3) ◽  
pp. 356-364 ◽  
Author(s):  
Li Yuan-Jie ◽  
Li Lin ◽  
Wang Gui-Ling ◽  
Song Shuai ◽  
Sun Yan-Ying
Keyword(s):  
Contaminated Soils ◽  
In Situ Remediation ◽  
Lead Zinc
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