Remediation of soil contaminated with the heavy metal (Cd2+)

2005 ◽  
Vol 122 (1-2) ◽  
pp. 7-15 ◽  
Author(s):  
Chuen-Chang Lin ◽  
Hong-Long Lin
Keyword(s):  
Heavy Metal ◽  
Remediation Of Soil

Surfactant Washing to Remove Heavy Metal Pollution in Soil: A Review

2020 ◽  
Vol 13 (1) ◽  
pp. 3-16
Author(s):  
Jianghong Liu ◽  
Jian Xue ◽  
Dandan Yuan ◽  
Xiaohang Wei ◽  
Huimin Su
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Pollution ◽  
Heavy Metal Pollution ◽  
Soil Washing ◽  
Cost Effective ◽  
Cost Effective Approach ◽  
Long Time ◽  
Protection Agent ◽  
Remediation Of Soil

Heavy metal pollution has pervaded many parts of the world, especially developing countries such as China. The discharge of wastewater containing heavy metals will cause soil pollution for a long time and harm to human health. Soil washing is an environmentally feasible and cost-effective approach for the clean-up of sites contaminated with heavy metals. As a relatively environmental protection agent, surfactants are widely used in soil washing. This paper generalized the methods of remediation of soil from heavy metals, expounded the mechanisms of soil washing by surfactant and the types of surfactants and summarized the application of different surfactants in washing heavy metals from soil. Finally, the application prospects and development trends of surfactant washing heavy metals from soil have been prospected.

Primary Investigation and Analysis of Arsenic Contamination in Soil-Plant of Tin Mine in Gejiu

2012 ◽  
Vol 518-523 ◽  
pp. 444-452 ◽  
Author(s):  
Jing Wang ◽  
Wei Xuan Fang
Keyword(s):  
Heavy Metal ◽  
Metal Contamination ◽  
Yunnan Province ◽  
Heavy Metal Contamination ◽  
Mining Area ◽  
Primary Study ◽  
Distribution Characteristics ◽  
Edible Parts ◽  
Remediation Of Soil

According to the primary study on the As contamination in soil and crops including potato and pea in tin tailings in Gejiu area, Yunnan Province, it has been found that concentrations of As in rhizosphere far exceed Chinese National Grade Ⅲ standard of soil environmental quality of China (GB 15618-1995). It also has been found that the Ferns were living in the tin tailings suffered from the contamination of heavy metals. Compared with the limit of national criteria for food sanitation in China, the concentrations of As in edible parts of ferns are 90 times. Therefore, the remediation of soil based on geochemical distribution characteristics of heavy metal in the tailings is demanded. And avoiding crops-planting in the tailings to reduce the diffusion of heavy metal contamination in food chain of mining area is necessary.

Complementary Z-Contrast Imaging and Digital Image Processing

1985 ◽  
Vol 43 ◽  
pp. 304-305
Author(s):  
K. N. Colonna ◽  
G. Oliphant
Keyword(s):  
Image Processing ◽  
Heavy Metal ◽  
Digital Image Processing ◽  
Digital Image ◽  
Biological Tissue ◽  
Biological Imaging ◽  
Tissue Preparation ◽  
Contrast Imaging ◽  
Imaging Tool ◽  
Z Contrast

Harmonious use of Z-contrast imaging and digital image processing as an analytical imaging tool was developed and demonstrated in studying the elemental constitution of human and maturing rabbit spermatozoa. Due to its analog origin (Fig. 1), the Z-contrast image offers information unique to the science of biological imaging. Despite the information and distinct advantages it offers, the potential of Z-contrast imaging is extremely limited without the application of techniques of digital image processing. For the first time in biological imaging, this study demonstrates the tremendous potential involved in the complementary use of Z-contrast imaging and digital image processing.Imaging in the Z-contrast mode is powerful for three distinct reasons, the first of which involves tissue preparation. It affords biologists the opportunity to visualize biological tissue without the use of heavy metal fixatives and stains. For years biologists have used heavy metal components to compensate for the limited electron scattering properties of biological tissue.

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