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排序方式: 共有818条查询结果,搜索用时 15 毫秒
81.
本文研究了用乙二胺铜(Ⅱ)—氯仿作为络合—萃取体系,石墨炉原子吸收技术间接测定水中痕量阴离子洗涤剂的一种方法。其检出限为2.0ug/1,加标回收率为89.6%~104.5%。具有选择性好、灵敏度高、快速简便等特点。同时还研究了水样的酸度和共存离子对测定的影响。对于用原子吸收进行有机分析具有一定的实际意义。 相似文献
82.
By using fluidized-bed furnace and rotary-kiln+stoker furnace and four different kinds of industrial wastes such as waste wood, coffee mill, waste oils and waste plastics, we have drawn the following conclusions:
(1) A relationship between H6CBz and DXN is acquired, which is DXN=0.34×H6CBz1.1.
(2) The following means of emission reduction can be considered. (a) Reduction of DXN and Cl accumulation within the furnace, (b) control by the incinerated object, (c) control through the precursors of H6CBz, (d) improvement through operational control, (e) ammonia injection into the high-temperature zone of the furnace seems to be effective in reducing DXN and (f) DXN concentration is high with CO above 1800 ppm, though it decreases with CO below ≈10 ppm. 相似文献
83.
Satoru Fujita Kenzi Suzuki Yasuo Shibasaki Toshiaki Mori 《Journal of Material Cycles and Waste Management》2002,4(1):70-76
Hydrogarnet was synthesized hydrothermally below 200°C using molten slag obtained from municipal solid waste. For comparison,
it was also synthesized using pure-phase CaO–Al2O3–SiO2–H2O, as reported previously. The structural and textural properties of this material were investigated using various analytical
and spectroscopic techniques such as X-ray diffraction, X-ray fluorescence spectrometry, atomic absorption spectrometry (AAS),
thermogravimetry/differential thermal analysis, Fourier transform infrared spectroscopy, and scanning electron microscopy.
The Cl− fixation ability of hydrogarnet was investigated in the temperature range 500–800°C in a fixed-bed flow reactor using a HCl
concentration (1000 p.p.m.v.) similar to that of incinerator exhaust gas. Under these experimental conditions, the hydrogarnet
was capable of reducing the HCl gas level to less than 1 p.p.m.v. Analysis of the spent catalyst revealed that the hydrogarnet
was being transformed into wadalite and CaCl2 at high temperatures. The elution test for chromium ions in hydrogarnet obtained from slag was also used, and it was found
that chromium ions were not eluted from hydrogarnet.
Received: January 27, 2001 / Accepted: October 11, 2001 相似文献
84.
采用机械球磨法对膨润土、硅藻土、高岭土3种天然黏土材料进行预处理,通过超声法将纳米TiO_2附着于其上制得复合材料,考察了不同复合材料加入量及养护时间条件下复合材料对电解锰渣中Mn的吸附固定效果。3种天然黏土材料中,硅藻土的平均粒径最小,比表面积和总孔隙度最大,对水中Mn的吸附量也最大。黏土材料附着纳米TiO_2后对电解锰渣中Mn的吸附固定效果较单纯黏土材料有明显改善。在养护时间为12 d、硅藻土附着纳米Ti O_2复合材料加入量为10%(w)的最佳条件下,Mn的TCLP浸出量较原电解锰渣下降了83.04%。 相似文献
85.
化学工业固体废物毒性鉴别分析 总被引:2,自引:0,他引:2
该文介绍了对硫酸烧渣和磷石膏两种固体废物进行急性毒性和浸出毒性鉴别试验的过程与结果 ,并对磷石膏由危险废物转变为非危险废物的原因进行了探讨 ,为硫酸烧渣和磷石膏的处置和利用提供了依据 相似文献
86.
87.
88.
污泥掺烧技术在煤粉炉上应用的试验研究 总被引:2,自引:0,他引:2
通过污泥掺烧技术在煤粉炉上的应用试验,得出污泥的含水率对锅炉制粉系统的影响.掺烧前后对炉膛温度没有大的影响,随着污泥比例的增加,燃烧效率下降,烟尘浓度和SO2浓度降低. 相似文献
89.
Technological improvements in automotive battery recycling 总被引:2,自引:0,他引:2
M.A. Kreusch M.J.J.S. Ponte H.A. Ponte N.M.S. Kaminari C.E.B. Marino V. Mymrin 《Resources, Conservation and Recycling》2007,52(2):368-380
Recycling of automotive batteries for the recovery of secondary lead is extremely important in Brazil, for the country does not possess large reserves of this metal. Lead is one of the most widely used metals in the world, but it is highly toxic, posing risks for humans and for the environment if not utilized or treated adequately. Industrial waste containing lead in Brazil are classified by the Brazilian Residue Code (NBR—10004:2004) as hazardous. The lead recycling process employed by the recycling industry in Brazil is the pyrometallurgical process in a rotary furnace. This process consists of four stages: (1) grinding of the battery to separate plastic, electrolyte and lead plates; (2) lead reduction in a rotary furnace; (3) separation of metallic lead from slag; and (4) refining of recycled lead. The purpose of this work is to propose process improvements aimed primarily at increasing production output by reducing the loss of lead in slag and particulates, thereby providing a healthier work environment in line with Brazilian environmental and labor laws. 相似文献
90.
提出运用高压变频技术实现电弧炉除尘风机变频调速的工艺.在70 t ABB电弧炉烟气治理运用中,以温度为调速系统主要控制参数,设计工频和变频两套系统,实现除尘风机的转速按工艺要求调节,其功率因数从0.83提高到0.97,除尘系统节电60%,冶炼工况同时也得到改善.表明该工艺具有广阔的应用前景. 相似文献