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on nitrogen removal rate of ammonia stripping process in wastewater treatment plant in Fuling District of Chongqing City. And meanwhile, the better value range of each factor was decided by economic analysis. The results show that the influence of each factor on nitrogen removal rate is remarkable. The better range of pH, stripping time, gas-liquid volume ratio and temperature are 10.25-11.75, ≤4 h, 400-1......
removal rate; ZnSO4 solution 基金项目:国家自然科技基金资助项目(51104181/E0412);中国博士后科学基金资助项目(20110491279);湖南省科技计划资助项目(2010FJ3117) 收稿日期:2012-03-05;修订日期:2012-12-20 通信作者:郭学益,教授,博士;电话/传真:0731-88877863;E-mail... ℃,气体流量800 mL/min,溶液pH=5.0,初始钴浓度20 mg/L,锌初始浓度100 g/L等条件下搅拌速度对除钴效果的影响 Fig. 1 Effect of stirring speed on cobalt removal result under 30 ℃, air flow rate of 800 mL/min, pH 5.0, intial concentrations......
Trans. Nonferrous Met. Soc. China 26(2016) 3046-3051 Mechanism of boron removal from Si-Al melt by Ar-H2 gas mixtures Jing-wei LI, Xiao-long BAI, Bo-yuan BAN, Qiu-xiang HE, Jian CHEN Key Laboratory... and iron in Si-Al melt were investigated during Ar-H2 gas blowing treatment. The mechanism of boron removal was discussed. The results indicate that gas blowing can refine grain size and increase......
Effect of surfactant on removal of particle contamination on Si wafers in ULSI TAN Bai-mei(檀柏梅), LI Wei-wei(李薇薇), NIU Xin-huan(牛新环), WANG Sheng-li(王胜利), LIU Yu-ling(刘玉岭) Institute... polishing or grinding whose surface force field is very strong was discussed, and the removal method of particle was studied. Particle is deposited on the wafer surface by interactions, mainly including......
Technology, Guilin 541004, China) Abstract: The relation between residual stress of removal layer and deformation of plate was established by the first kind of linear integral, in which the discrete deformation inverse determines the stress function. The analytical method of residual stress was introduced and improved by the physical model of removal layer method. With different experimental......
, China) Abstract: Using fly ash as a carrier, three kinds of methods were used to modify the nature of fly ash in order to study adsorption characteristics and the removal of formaldehyde in air under... of formaldehyde is 0.41 mg/m3 and the temperature is 25 ℃, the maximum removal rate can reach 70.48%, which is much higher than that of non-modified fly ash (30.71%), and as much as that of coal-based......
and anaerobic-aerobic-flocculation as well as chemical phosphorus removal of hypersaline mustard wastewater are conducted. The optimal operation condition and parameters in pretreatment of mustard... and 35.53 mg/L and the dosage of flocculent (PAC) is 400 mg/L. The anaerobic-aerobic-flocculation combined operation condition and postpositive phosphorous removal with ferrous sulfate are employed......
words: thio-arsenate; removal of arsenic; sulfidation reaction; thermodynamics 随着钨矿资源的不断开发和利用,优质钨资源日益减少,处理品位低,杂质含量高的钨矿已成为钨冶金中一个很现实的问题.这些高杂质的钨矿中,除了杂质元素钼以外,砷的含量也日益增加.而随着硬质合金,电子,国防等工业的发展,对钨制品尤其是对许多尖端用途所... for Mo removal from tungstate solution[J]. The Chinese Journal of Nonferrous Metals, 2001, 11(3): 499-502. [7] 肖若珀. 砷的提取,环保和应用方向[M]. 柳州: 广西金属学会出版社,1992: 58.XIAO Ruo-po. Extraction, environmental protection......
Phosphorus removal mechanism in constructed wetlands with high calcium fly ash as substrateCAO Shi-wei1, 2, CHEN Wei1, JING Zhao-qian2(1. Environmental Science and Engineering, Hohai University, Nanjing 210098, China; 2. College of Civil Engineering, Nanjing Forest University, Nanjing 210037, China)Abstract:In order to strengthen phosphorus removal efficiency of constructed wetlands and expand the reuse......