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481.
我国的电子垃圾回收利用基本处于失控状态,缺乏监管。回收处理方式:一是作为普通垃圾被填埋;二是对于尚能使用的废弃电子产品拿到旧货市场贩卖,不能使用的则私自拆解,回收提炼贵金属,丢弃不能利用的产品,对环境产生极大危害。因此,应建立和完善电子垃圾回收处理法规体系,回收利用体系,开发电子废物处理利用的新技术,改变无序发展状态。 相似文献
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Can Shen Xiangping Gu Bin Yang Dexian Zhang Zhilin Wang Zhengxiang Shu Jeffrey Dick Anhuai Lu 《环境科学学报(英文版)》2020,32(3):156-166
Different natural sphalerites have a range of photocatalytic properties that can potentially be exploited for environmental remediation purposes.To develop value in the exploitation of sphalerite,samples were collected from 19 ore deposits in China and characterized for their mineralogical and photocatalytic properties.X-ray diffraction(XRD) and electron probe micro analysis(EPMA) measurements indicated that all the natural sphalerites from various localities crystallized in cubic phases with va... 相似文献
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Shu Ling Zhang Zhen Xiang Xin Zhen Xiu Zhang Jin Kuk Kim 《Waste management (New York, N.Y.)》2009,29(5):1480-1485
The aim of this research was to recycle waste rubber tires by using powdering technology and treating the waste rubber tire powder with bitumen. It has been proven that the elongation at break, thermal stability and processing flowability of composites of polypropylene (PP), waste rubber tire powder (WRT) and bitumen composites are better than those of PP/WRT composite. A comparative study has been made to evaluate the influence of bitumen content and different compatibilizers on the properties of PP/WRT/bitumen composites, using a universal testing machine (UTM), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and a capillary rheometer. The results suggested that the properties of PP/WRT/bitumen composites were dependent on the bitumen content and the kind of compatibilizer used. 相似文献
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Zexu Jiao Canquan Zhou Jie Li Yimin Shu Xiaoyan Liang Mingfang Zhang Guanglun Zhuang 《黑龙江环境通报》2003,23(8):646-651
Preimplantation genetic diagnosis (PGD) offers couples at risk for transmitting an inherited disorder the possibility to avoid the need to terminate affected pregnancies. PGD for monogenic diseases is most commonly accomplished by blastomere biopsy from cleavage-stage embryos, followed by PCR-based DNA analysis. However, the molecular heterogeneity of many monogenic diseases requires a diagnostic strategy capable of detecting a range of mutations and compound genotypes. With the above considerations, we developed an accurate and reliable strategy for analysis of β-globin gene mutations, applicable for PGD for the wide spectrum of β-thalassemia major mutations in the Chinese population. The strategy involves primer-extension preamplification (PEP), followed by nested PCR and reverse dot blot (RDB) for mutation detection since it facilitates simultaneous analysis of more than one mutation in a single cell. This report describes the application of the strategy in two clinical IVF/PGD cycles at risk for transmitting β-thalassemia major, which resulted in the first thalassemia-free children born after PGD in China. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
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