During mining activities, a large amount of wastes in the form of mine tailings were discharged, leading to a global problem in soil and water contamination. Phytoremediation was considered to be a potential method for remediation of mine wastes as vegetation can promote remediation for sustainable development of mine waste sites. Recently, studies were conducted to utilize microorganisms such as plant growth-promoting bacteria, or filamentous fungi to facilitate phytoremediation by increasing the plant biomass production, bioavailability of heavy metals (HMs), enhancing the plant uptake of HMs or reduce toxicity of HMs to plants. Some species of microorganisms can be beneficial to phytoremediation in the mine tailings contaminated with HMs.
In recent years, polymer had been used in various situations and its use was increasing year by year. However, weathering was a complex process in which UV light, moisture and temperature variations all contributed to the deterioration of polymer properties. This paper reviewed the aging study progress of polymeric materials in recent years and the research problems. The evaluation methods of aging and antiaging of polymer materials were described, concerning with experiments, determinations and pathways of aging and antiaging. A relatively elaborate synthetical evaluation system of aging and antiaging was established.
This article reviewed some of the measures taken to control particulate matters by combining the latest fine particles dominating technologies both at home and abroad. The coagulation technological principles and research achievements of fine particles were suggested. The research highlightly analyzed the technical principles and characteristics of electric coagulation technology, acoustic coagulation technology, vapor condensation technology, thermal coagulation technology,chemical coagulation technology, magnetic coagulation technology, turbulent coagulation technology and light coagulation technology.On the basis of comprehensive analysis of these technologies, it pointed out the development trend of fine particle control technology.
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