7th UK CARE Annual General Meeting

Greenwich, 15 September 2007

UK Chinese Association of Resources and Environment

7th UK CARE AGM, Greenwich, CD-ROM Proceedings

5. Posters Session Abstracts

P01

Use NDVI to assess some diseases influenced by climate change

Liu, Yanyun

University of Zimbabwe; piggyliu2005@gmail.com

This paper is intended to conclude the hazardous waste management on legislation and institutional framework of China. As a populous developing country, in order to harmonize the economic development, social progress and environmental protection, China has enacted series of laws and regulations on environment protection and pollution control since 1980s. By looking into all of Chinese hazardous waste laws, law-making and related government authorities, readers will get a complete understanding of them.

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P02

Research on Removal and Recovery of Heavy Metals in Urban Sludge

Zeng, Xiang-feng

College of Urban and Environmental Science, Tianjin Normal University; Tianjin Key Laboratory of  Water Resources and Water Environment, Tianjin 300384; zengxiangfeng0606@126.com

This paper researched of the content and formcity of heavy metals in the Municipal sludge,showed : the copper 's content is as high as 4386.2mg/K, and the zinc is 2170.6 mg / kg. so they have high recycled value; Copper and Zinc in the municipal sludge exist in their forms of sulfide, organic combination and residual. There is only a little toxicity in the sludge. Therefore, the municipal sludge can be used as resources by proper treatments.The detailed extractions are performed in 4.0 of pH value at room temperature in 4 hours,and copper and zinc can be carried out safely.Using improved ferrite way and lime milk as netralization, copper and zinc recovery from sewage sludg extract fluid by acetic acid-H2O2,The result was obtained that copper and zinc recovery was 94% and 98% and the resideual extract fluid could be dicharged legally in the process conditions that the initial concentrations of FeCl3 /FeSO4 was 0.10/0.05mol/L, and the FeCl3 /FeSO4 adding volume Fe2+:Fe3+（mol value）=1:2&Fe3+/Mn+ (Cu2+,Zn 2+) =10, the pH value was9, temperature was ordinary temperature, the reaction time was one hour.

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P03

Modal energy density influence on in situ sound reduction index measurements

Sun Huaiwei; Zhu, Lei; Wang, Kang; Yang, Jinzhong

State Key Laboratory of Water Resources and Hydropower Engineering Sciences, Wuhan University, Hubei, 430072, China; huaiweisun@yahoo.com.cn

In order to reveal the mechanisms and patterns of solute transport in soils comprehensively, tracers were applying to solute transport studies. The study provided a method for the examination of solute transport at a higher resolution than previously achieved. Through the data from on-the-spot survey, the solute distribution in the soil was explored. The results indicate that the distribution of solute concentration show the more variability and uncertainty than the water flow in the soil.

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P04

Contemporary landscape planting perspectives and the potential role of hemi-parasites in practice

Gao, Feng

University of Sheffield; arp05fg@shef.ac.uk

With ‘naturalistic?and ‘ecological?type of landscape planting design approach in contemporary perspectives, this paper analysed ‘ecological?can’t be decided without the distinctive consideration in specific situation especially in urban context and the problems in the practice of naturalistic herbaceous vegetation. Due to the competitive relationship which is much fiercely in high soil fertilizer conditions, the plants with high competitive ability capture more resources from environment and occupy the dominant location in the community suppressing the growth and development of other less competitive plants, leading the decrease of species diversity and challenging the appearance of ‘naturalistic?type of vegetation. Except some traditional methods to decrease soil fertility, another kind of approach using hemi-parasites such as Rhinanthus spp. to adjust the competitive relationship between plant species in the community through hemi-parasites?selective parasitism has been practiced in habitat conservation schemes. However, there are some perspectives to explore some other hemi-parasite species (Castilleja and Pedicularis) and test their roles in urban naturalistic herbaceous vegetation.

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P05

Evaluation of the arsenic(V) removal from water by hydrotalcite-like compounds

Chang W¹; Jones H¹; Valsami_Jones E²; Garelick H¹

             ¹ Institute of Social and Health Research, School of Health and Social Sciences, Middlesex University Queensway, Enfield Middlesex
            ² Department of Mineralogy, The Natural History Museum

Arsenic contaminated drinking water is recognized as the greatest threat to public health. WHO has lowered the recommended guideline value to 10ug/L as the maximum contaminant level (MCL), strengthening the need for simple and low cost arsenic removal technology.

Hydrotalcite-like compounds as potential adsorbents have attracted the attention of researchers due to its special properties e.g. anion exchange and memory effect. Three HT-like compounds were synthesized and tested: Mg-Al-NO3-HT, Mg-Fe-NO3-HT(1) synthesized under nitrogen atmosphere and Mg-Fe-NO3-HT(2) synthesized under ambient atmosphere. Batch experiments including time-dependent adsorption, pH-dependent adsorption and adsorbent dose were carried out and adsorption isotherm were elucidated.

Arsenic adsorption onto the three minerals was reached after 18 hours. A two-step arsenic uptake, a faster surface adsorption process and a slower ion exchange process, was observed. In the neutral pH region (6.6-8.8), the arsenic adsorption capacity was found to be quite stable for Mg-Fe-NO3-HT(1) and Mg-Fe-NO3-HT(2). The isotherm profiles of Mg-Al-NO3-HT Mg-Fe-NO3-HT (1) and Mg-Fe-NO3 -HT (2) were all S-type (subgroup 3), indicating that the change from external to interlayer adsorption may have occurred to the three minerals.

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