Effects of straw addition on physiological parameters and uptake of heavy metals in Ricinus communis under the stress of Pb/Zn mine tailing

2013 ◽  
Vol 38 (3) ◽  
pp. 325-329
Author(s):  
Jia-wen ZHU ◽  
Dong-sheng ZOU ◽  
Yan-ci XIANG ◽  
Hui WANG ◽  
Wei-wen TAN
Keyword(s):  
Heavy Metals ◽  
Ricinus Communis ◽  
Physiological Parameters ◽  
Mine Tailing

scholarly journals Heavy Metals in Mine-Tailing Soil Mixtures Cultivated with Ricinus communis L.

2018 ◽  
Vol 27 (5) ◽  
pp. 2007-2022 ◽  
Author(s):  
Elizabeth González-Terreros ◽  
Victor Ruiz-Valdiviezo ◽  
Alejandro Galván-Velázquez ◽  
Marina Franco-Hernández ◽  
Marco Luna-Guido ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Ricinus Communis ◽  
Mine Tailing ◽  
Ricinus Communis L ◽  
Soil Mixtures

scholarly journals Evaluation of Phytoremediation Potential of Castor Cultivars for Heavy Metals from Soil

2019 ◽  
Vol 37 ◽  
Author(s):  
M.J. KHAN ◽  
N. AHMED ◽  
W. HASSAN ◽  
T. SABA ◽  
S. KHAN ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Contaminated Soils ◽  
Metal Uptake ◽  
Plant Biomass ◽  
Ricinus Communis ◽  
Contaminated Sites ◽  
Heavy Metal Uptake ◽  
Randomized Design ◽  
Completely Randomized Design

ABSTRACT: Phytoremediation is a useful tool to restore heavy metals contaminated soils. This study was carried out to test two castor (Ricinus communis) cultivars [Local and DS-30] for phytoextraction of heavy metals from the soil spiked by known concentrations of seven metals (Cu, Cr, Fe, Mn, Ni, Pb and Zn). A pot experiment was laid out by using a completely randomized design. Soil and plant samples were analyzed at 100 days after planting. The data on heavy metal uptake by plant tissues (roots, leaves and shoots) of the two castor cultivars suggested that a considerable amount of metals (Fe = 27.18 mg L-1; Cu = 5.06 mg L-1; Cr = 2.95 mg L-1; Mn = 0.22 mg L-1; Ni = 4.66 mg L-1; Pb = 3.33 mg L-1; Zn = 15.04 mg L-1) was accumulated in the plant biomass. The soil heavy metal content at the end of experiment significantly decreased with both cultivars, resulting in improved soil quality. Therefore, it is concluded that both castor cultivars, Local and DS-30, can be used for phytoremediation of heavy metal-contaminated sites.

scholarly journals Immobilization Potential of Cow Manure for Heavy Metal Remediation from Refuse Dump Soil

2021 ◽  
pp. 44-55
Author(s):  
Ezeudu Emeka Christian ◽  
Oli Christian Chukwuemeka ◽  
. Enenche ◽  
Elaigwu Daniel ◽  
Anekwe Ozioma Juliana ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Ricinus Communis ◽  
Cow Manure ◽  
Industrial Chemistry ◽  
Refuse Dump ◽  
Anambra State ◽  
Mn Oxide ◽  
Greenhouse Study ◽  
Mobility Factor ◽  
Heavy Metal Remediation

Aims: The present study investigated the effect of cow manure amendment on fractionation and availability of some heavy metals (Cd, Cu, Cr, Mn, Pb and Zn) in refuse dump soil. Study Design: A greenhouse study experiment was conducted to determine the uptake of the metals by Ricinus communis in dump soil treated with 0%, 5%, 10% and 20% cow manure. Place and Duration of Study: The study was carried out at the Department of Pure and Industrial Chemistry, Nnamdi Azikiwe University Awka, Anambra State, Nigeria, between May and October 2018. Methodology: Experimental pots were filled with 2.0kg refuse dump soil in a green house and treated with 5%, 10% and 20% of Cow manure in three replicates per treatment. The seeds of Ricinus communis were planted in each pot and analysed after 12 weeks of planting for heavy metals using AAS. Sequential extraction was carried out on the treated soil after the harvest with each extract further analysed for heavy metals using AAS. Results: Application of cow manure significantly (p ˂ 0.05) affected the redistribution and the mobility of the heavy metals in the dump soil; as the concentration of the amendment increased, heavy metals in the mobile fractions reduced. 20% amendment had the best immobilization effect as the mobility factor decreased with increasing manure amendment. The mobility factors at 20% amendment were 18.34%, 15.82%, 5.23%, 15.86%, 25.56% and 12.81% for Cd, Cr, Cu, Mn, Pb and Zn respectively with the general trend of metal forms given as: residual > bound to organic > bound to Fe-Mn oxide > bound to carbonate > exchangeable. Conclusion: Cow manure amendment of the dump soil decreased the availability of heavy metals for plant uptake; and the metal uptake generally decreased as percentage amendment increased. Cow manure is therefore a good immobilizing agent for remediation of Cd, Cr, Cu, Mn, Pb and Zn in polluted soils.

Study on Procedure Toxicity and Harmless Disposal of Manganese Mine Tailing Slag

2011 ◽  
Vol 414 ◽  
pp. 312-316 ◽  
Author(s):  
Wen Zhang Huang ◽  
Ning Lu
Keyword(s):  
Heavy Metals ◽  
Water Content ◽  
Extraction Procedure ◽  
Mine Tailing ◽  
Hazardous Wastes ◽  
Manganese Zinc ◽  
Leaching Solution ◽  
Cement Solidification ◽  
Harmless Disposal

Manganese mine slag was the salvage in the course of manganese producing. Many matters shall be extracted by rain eluviation and then turn into the water and soil to pollute environment. The water content and extraction procedure toxicity of the manganese waste residue were studied. Combining solidification additive was used to process the manganese waste residue for the harmless disposal. The results showed that the contents of Manganese、Zinc、Chromium and Cadmium in the manganese waste slag exceeded the maximum of the Chinese Identification standard for hazardous wastes. The extraction procedure toxicity was effectively decreased by the harmless disposal when the proportion of cement and manganese in the whole mine slag was 60%, and the content of heavy metals in the leaching solution were under the standard. Hence, the method of cement solidification could control the pollution to the environment effectively.

scholarly journals Safe Cultivation of Medicago sativa in Metal-Polluted Soils from Semi-Arid Regions Assisted by Heat- and Metallo-Resistant PGPR

2019 ◽  
Vol 7 (7) ◽  
pp. 212 ◽  
Author(s):  
Anas Raklami ◽  
Khalid Oufdou ◽  
Abdel-Ilah Tahiri ◽  
Enrique Mateos-Naranjo ◽  
Salvadora Navarro-Torre ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Medicago Sativa ◽  
Contaminated Soils ◽  
Plant Stress ◽  
Bacterial Consortium ◽  
Physiological Parameters ◽  
Metal Stress ◽  
Resistant Bacteria ◽  
Ros Scavenging ◽  
Metal Transporter

Soil contamination with heavy metals is a constraint for plant establishment and development for which phytoremediation may be a solution, since rhizobacteria may alleviate plant stress under these conditions. A greenhouse experiment was conducted to elucidate the effect of toxic metals on growth, the activities of ROS (reactive oxygen species)-scavenging enzymes, and gene expression of Medicago sativa grown under different metal and/or inoculation treatments. The results showed that, besides reducing biomass, heavy metals negatively affected physiological parameters such as chlorophyll fluorescence and gas exchange, while increasing ROS-scavenging enzyme activities. Inoculation of M. sativa with a bacterial consortium of heat- and metallo-resistant bacteria alleviated metal stress, as deduced from the improvement of growth, lower levels of antioxidant enzymes, and increased physiological parameters. The bacteria were able to effectively colonize and form biofilms onto the roots of plants cultivated in the presence of metals, as observed by scanning electron microscopy. Results also evidenced the important role of glutathione reductase (GR), phytochelatin synthase (PCS), and metal transporter NRAMP1 genes as pathways for metal stress management, whereas the gene coding for cytochrome P450 (CP450) seemed to be regulated by the presence of the bacteria. These outcomes showed that the interaction of metal-resistant rhizobacteria/legumes can be used as an instrument to remediate metal-contaminated soils, while cultivation of inoculated legumes on these soils is still safe for animal grazing, since inoculation with bacteria diminished the concentrations of heavy metals accumulated in the aboveground parts of the plants to below toxic levels.

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