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261.
茶尘(大叶种)分散度的测定 总被引:1,自引:0,他引:1
论述了利用图像分析系统对茶尘(大叶种)分散度的测定,得到了分散度的结果,并对测定结果进行了讨论. 相似文献
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Radiation-induced reduction of chromium(Ⅵ)(Cr(Ⅵ) by ,γ-irradiation was studied with an initial concentration of 42 mg/L in aqueous solutions. Several factors which might affect the reduction of Cr(Ⅵ) to Cr(Ⅲ) were examined, pH of aqueous solution affects the reduction efficiency significantly. Acidic condition of aqueous solution accelerates the process. At pH 2, a reduction of 86.2% was achieved with the absorbed dose of 15 kGy, while, with the same dose, at pH 5 and 7, the reduction ofCr (Ⅵ) were only 36.3% and 22.2%, respectively. Ethanol (0.1% in V:V) and sodium carbonate (1 mmol/L) were added into the solution respectively as relatively non-toxic hydroxyl radical scavengers. Reduction rate increased greatly in the presence of ethanol at each pH. Reduction efficiency of Cr(Ⅵ) was enhanced in neutral condition with the addition of sodium carbonate, however, no enhancement was found in acidic condition. The reduction of Cr(Ⅵ) was restrained when the solution was saturated with oxygen; however, the restraint was not significant. 相似文献
264.
介绍了球团坚炉的烟尘排放特性,分析研究了影响静电除尘器工作性能的主要因素,总结了静电除尘改造工程中技术改进经验和运行管理所取得的经验。 相似文献
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Introduction Chrom ium com pounds are extensively used in electroplating, leather-tanning and other industries. In C hina, chrom ium is incorporated into the environ- m ent, m ainly into soils and stream s of w ater, as a result of unregulated application… 相似文献
269.
Synthesis and application of lignin-based copolymer LSAA on controlling
non-point source pollution resulted from surface runoff 总被引:2,自引:0,他引:2
LIU Chen WU Guangxi MU Huanzhen YUAN Zonghuan TANG Lianyi LIN Xiangwei 《环境科学学报(英文版)》2008,20(7):820-826
In this article,alkali lignin separated from paper pulp waste was grafted into a novel copolymer LSAA (a copolymer of lignin,starch, acrylamide,and acrylic acid).Its practical application effect and environmental safety were studied.The results of field simulation experiment indicated that the application of LSAA significantly affected the output of the runoff and pollutants.The runoff quantity was decreased by 16.67%-47.00%and the loads of total suspended solids (TSS),chemical oxygen demand (COD),total ... 相似文献
270.