An“ex situ”microbial process for the removal of heavy metals from polluted soil: A case study of Ada rice field, Adani, Enugu State, Nigeria

2017 ◽  
Vol 21 (3-4) ◽  
pp. 128-137 ◽  
Author(s):  
Charles O. Nwuche ◽  
Oguejiofo T. Ujam ◽  
Janefrances N. Ihedioha ◽  
Charles C. Chime
Keyword(s):  
Heavy Metals ◽  
Rice Field ◽  
Polluted Soil ◽  
Ex Situ ◽  
Microbial Process ◽  
Removal Of Heavy Metals ◽  
Enugu State

Applications of Bentonite to Soil Decontamination

2018 ◽  
Vol 69 (7) ◽  
pp. 1695-1698
Author(s):  
Marin Rusanescu ◽  
Carmen Otilia Rusanescu ◽  
Gheorghe Voicu ◽  
Mihaela Begea
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Laboratory Experiments ◽  
Experimental Studies ◽  
Heavy Metal Concentration ◽  
Polluted Soil ◽  
Raw Material ◽  
Soil Decontamination ◽  
Metal Retention ◽  
Removal Of Heavy Metals

A calcium bentonite from Orasu Nou deposit (Satu Mare Romania) was used as raw material. We have conducted laboratory experiments to determine the influence of bentonite on the degree of heavy metal retention. It has been observed that the rate of retention increases as the heavy metal concentration decreases. Experimental studies have been carried out on metal retention ( Zn) in bentonite. In this paper, we realized laboratory experiments for determining the influence of metal (Zn) on the growth and development of two types of plants (Pelargonium domesticum and Kalanchoe) and the effect of bentonite on the absorption of pollutants. These flowers were planted in unpolluted soil, in heavy metal polluted soil and in heavy metal polluted soil to which bentonite was added to observe the positive effect of bentonite. It has been noticed that the flowers planted in unpolluted soil and polluted with heavy metals to which bentonite has been added, the flowers have flourished, the leaves are still green and the plants whose soils have been polluted with heavy metals began to dry after 6 days, three weeks have yellowish leaves and flowers have dried. Experiments have demonstrated the essential role of bentonite for the removal of heavy metals polluted soil.

scholarly journals Treatment of Wastewater. Removal of Heavy Metals by Nanofiltration. Case Study: Use of TFC Membranes to Separate Cr (VI) in Industrial Pilot Plant

2012 ◽  
Vol 44 ◽  
pp. 2020-2022 ◽  
Author(s):  
J.A. Otero ◽  
O. Mazarrasa ◽  
A. Otero-Fernández ◽  
M.D. Fernández ◽  
A. Hernández ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Pilot Plant ◽  
Removal Of Heavy Metals

Elaborate design of polymeric nanocomposites with Mg(ii)-buffering nanochannels for highly efficient and selective removal of heavy metals from water: case study for Cu(ii)

2018 ◽  
Vol 5 (10) ◽  
pp. 2440-2451 ◽  
Author(s):  
Qina Sun ◽  
Yujia Yang ◽  
Zhixue Zhao ◽  
Qingrui Zhang ◽  
Xinmei Zhao ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Metal Oxide ◽  
Selective Removal ◽  
Polymeric Nanocomposites ◽  
Highly Efficient ◽  
Removal Of Heavy Metals ◽  
Nanostructured Metal

Zr/Mg oxide-PS was designed to extend the applicability of nanostructured metal oxide bearing composites to Cu(ii) removal in acidic wastewaters.

scholarly journals IN SITU AND EX SITU BIOREMEDIATION OF HEAVY METALS: THE PRESENT SCENARIO

2021 ◽  
Vol 29 (4) ◽  
pp. 454-469
Author(s):  
Oindrila Paul ◽  
Amrita Jasu ◽  
Dibyajit Lahiri ◽  
Moupriya Nag ◽  
Rina Rani Ray
Keyword(s):  
Heavy Metals ◽  
Gene Editing ◽  
Ex Situ ◽  
The Past ◽  
Effective Removal ◽  
Removal Of Heavy Metals ◽  
Recent Developments ◽  
Polluted Sites ◽  
Rapid Industrialization

Enhanced population growth, rapid industrialization, urbanization and hazardous industrial practices have resulted in the development of environmental pollution in the past few decades. Heavy metals are one of those pollutants that are related to environmental and public health concerns based on their toxicity. Effective bioremediation may be accomplished through “ex situ” and “in situ” processes, based on the type and concentration of pollutants, characteristics of the site but is not limited to cost. The recent developments in artificial neural network and microbial gene editing help to improve “in situ” bioremediation of heavy metals from the polluted sites. Multi-omics approaches are adopted for the effective removal of heavy metals by various indigenous microbes. This overview introspects two major bioremediation techniques, their principles, limitations and advantages, and the new aspects of nanobiotechnology, computational biology and DNA technology to improve the scenario.

scholarly journals Effects of Heavy Metals on Agronomic Attributes of Some Selected Cereal Crops (Zea mays and Sorghum bicolor)

2020 ◽  
pp. 24-30
Author(s):  
G. I. Ameh ◽  
H. O. Nwamba ◽  
C. D. Nwani ◽  
E. C. Ofordile
Keyword(s):  
Heavy Metals ◽  
Zea Mays ◽  
Vegetative Growth ◽  
Growth Parameters ◽  
Control Sample ◽  
Exchange Capacity ◽  
Polluted Soil ◽  
Soil Samples ◽  
State University ◽  
Enugu State

Aims: To investigate the effect of Heavy metals on the growth of Zea mays (Z. mays) and Sorghum bicolour (S. bicolour). Study Design: Laboratory-experimental design was used in this study. Place of Study: The heavy metal polluted soil samples were collected from Crush Rock Industries Ishiagu, Ebonyi State, Nigeria, while control soil samples were obtained from the Zoological Garden of the Department of Applied Biology and Biotechnology, Enugu State University of Science and Technology. Methodology: The seeds of the two plants were collected from the Enugu State Ministry of Agriculture. The experimental setup consisted of 16 contaminated potted soils, 8 each for Z. mays and S. bicolor. Another 8 potted soils not contaminated with heavy metals served as control. Fourteen days after germination, the following growth parameters were measured (in cm); plant heights, number of leaves, stem girth, and leaf area. Results: The polluted soil sample was slightly acidic; (pH was 6.34±0.29). It had a higher cation exchange capacity (21.80±0.33), Cd (25.18±0.34), Cr (10.20±0.21), Cu (28.54±0.49), Pb (9.92±0.36), but lesser soil organic carbon (0.87±0.10). Plant samples cultivated in contaminated soil showed the least favourable vegetative growth. Conclusion: Comparing the results obtained from the control sample, it was deduced that these heavy metals have adverse effect on the vegetative growth of Z. mays and S. bicolor.

Highly effective removal of heavy metals by polymer-based zirconium phosphate: A case study of lead ion

2007 ◽  
Vol 310 (1) ◽  
pp. 99-105 ◽  
Author(s):  
B.C. Pan ◽  
Q.R. Zhang ◽  
W.M. Zhang ◽  
B.J. Pan ◽  
W. Du ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Zirconium Phosphate ◽  
Lead Ion ◽  
Effective Removal ◽  
Highly Effective ◽  
Removal Of Heavy Metals

Pilot scale study on the ex situ electrokinetic removal of heavy metals from municipal wastewater sludges

2002 ◽  
Vol 36 (19) ◽  
pp. 4765-4774 ◽  
Author(s):  
Soon-Oh Kim ◽  
Seung-Hyeon Moon ◽  
Kyoung-Woong Kim ◽  
Seong-Taek Yun
Keyword(s):  
Heavy Metals ◽  
Municipal Wastewater ◽  
Pilot Scale ◽  
Ex Situ ◽  
Removal Of Heavy Metals ◽  
Wastewater Sludges
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