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Search Results: 1 - 10 of 164166 matches for " 黄建忠? "
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酸改性活性炭对含锑矿坑废水的吸附研究
Method of Removing Sb2+ from Mine Water by Acid Modified Activated Carbon Adsorption
 [PDF]

,
Advances in Environmental Protection (AEP) , 2014, DOI: 10.12677/AEP.2014.46033
Abstract:
为使矿井废水达到地表三类水的排放要求,针对低浓度Sb2+难以去除的特点,我们主要采用酸改性活性炭两级吸附工艺对Sb2+进行吸附处理。通过吸附剂优选实验,单因素和正交试验确定了,酸改性活性炭在pH值为5,吸附时间为2.0 h,投药量为5 g/L时能使Sb2+降到0.02 mg/L以下,达到地表水III类水体标准。BET、SEM机理分析表明,酸改性活性炭比表面积得到增大,杂质减少,孔道被疏通;Boehm滴定法得出酸性表面官能团的含量明显增加。酸改性活性炭对Sb2+的吸附情况符合Langmuir方程,吸附属于多单层覆盖;其吸附过程遵循准二级动力学模型,相s关系数达到0.994。
To meet “The Environmental Quality Standard for Surface Water” III kind of water standard re-quirement, according to the characteristic of low concentration Sb2+ is difficult to remove, we mainly adopt acid modified activated carbon two-stage adsorption process to deal with Sb2+. Adsorbent optimization experiment, single factor and orthogonal test determine that acid modified activated carbon works well for Sb2+ remove, with the optimal processing parameters as pH is 5, adsorption time is 2.0 h, coagulant dosage is 5 g/L. BET, SEM analysis showed the specific surface area increased, reducing impurity, channel unblocked. In addition, Boehm concluded that acidic surface functional groups increased obviously. Finally, the fit of the adsorption isotherm for modified activated carbon and Sb2+ follows Langmuir adsorption isotherm which belongs to monolayer coverage. It obeys a pseudo-second order kinetic model and the correlation coefficient is 0.994.
THE ASYMPTOTIC EXPANSIONS OF QUINTIC LACUNARY INTERPOLATION SPLINES
五次缺插值样条的渐近性态

,达人
计算数学 , 1984,
Abstract: The asymptotic expansions of quintic lacunary interpolation splines are obtained in thecase of uniform mesh. Hence the error bounds are estimated more accurately.
五次缺插值样条的渐近性态
,达人
计算数学 , 1984,
Abstract: f(x)定义于[0,1]。将[0,1]n等分,记x_j=jh,j=0,…,n.h=1/n,且f~(α)(x_j)=f_j~(α),j=0,…,n;α=0,1,…,5。A.Meir和A.Sharma提出五次缺插值样条函数,即满足下面条件的函数s_n(x):(i)s_n(x)∈C~3[0,1],(ii)在区间[x_j,x_(j+1)]上(j=0,…,n-1),s_n(x)是五次多项式,(iii)s_n(x_j)=f_j,s″_n(x_j)=f″_j,j=0,…,n,(iv)s′_n(0)=f′_0,s′_n(1)=f′_n。(1)[1]还考虑了把(1)中的(iv)换成(iv′)s′′′_n(0)=f′′′_0,s′′′_n(1)=f′′′_n(2)的五次样条。为叙述方便,我们分别称之为(Ⅰ)型、(Ⅱ)型缺插值样条。[1]证明了(Ⅰ),(Ⅱ)型插值样条在n为奇数时是唯一存在的。[2,3,4]继续了这方面的工作,得到了一
提高放线菌次级代谢产物产量方法的研究进展
雷秀清,李力,
生物技术通报 , 2014,
Abstract: 放线菌的次级代谢产物一直是抗生素等药物开发的重要来源。通过基因技术来提高放线菌次级代谢产物产量的方法已被广泛接受。结合近年的研究成果,概述了利用基因技术过表达或者敲除代谢途经关键基因及加倍基因簇,诱变核糖体相关蛋白的基因,以及异源表达外源基因簇等提高次级代谢产物产量的方法。旨在为寻找新药及改造高产菌株提供相应的技术参考。
病绵羊体内分离的拟似绵羊附睾种布氏菌的首次系统鉴定与分类
冯培,苏城,
牲畜兽医学报 , 1997,
Abstract:
一类新型手性表面活性剂的研究
,高强,王传
物理化学学报 , 2003,
Abstract:
ha高产菌schizochytriumsp.fju-512的分离及其18srrna基因序列比较分析
,江贤章
应用与环境生物学报 , 2005,
Abstract: 摘要采用松花粉垂钓法分离到一株docosahexaenoicacid(dha)高产菌fju?512.该菌株dha含量高(占总脂肪酸的56.24%),其它长链杂酸含量少(仅有docosapentaenoicacid,dpa),极具开发应用价值.高密度培养可获得33gl-1生物量.该菌株行二分裂生长,没有分生胞子.对其18srrna基因进行了克隆测序并登录genbank(ay758384).依据18srrna基因建立的系统进化树表明:该菌与schizochytriumlimacinum具有紧密的亲源关系.图7表2参29
移动式矿井泥浆处理设备运行参数研究
Mobile Mine Mud Treatment Equipment Operation Parameters Optimization Research
 [PDF]

苗学敏, , 李登琨, 王俊峰, 包丽洁,
Hans Journal of Chemical Engineering and Technology (HJCET) , 2014, DOI: 10.12677/HJCET.2014.41002
Abstract: 根据铜坑矿开采过程中所产生的矿井泥浆的性质特点,通过对泥饼含水率、干泥浆产量和固体回收率等测定分析,研究了移动式矿井泥浆处理设备主要运行参数投药量、压滤机滤带移动速度、滤带张力、进泥量以及进泥含水率对泥浆处理效果的影响。结果表明:投药量为3~4 mg/g (PAM/Al2(SO4)3 = 1:1)、滤带移动速度为2~3 m/min、滤带张力为3~3.5 kg/cm2、进泥量为0.8 L/S时,泥浆处理后泥饼呈固态饼状,固体回收率在92%以上,含水率降到40%以下。
 According to the characteristics of the mine slurry produced in process of Tongkeng Mine, through the determination of filter cake moisture content, dry mud yield and solid recovery rate, it examines the effects of mobile mine mud treatment of main operating parameters of equipment of the dosage, filter press moving speed, belt tension, mud volume and water content of sludge on sludge dewatering. The result shows that when the dosage is 3 - 4 mg/g (PAM/ Al2(SO4)3 = 1:1), belt moving speed is 2 - 3 m/min, belt tension is 3 - 3.5 kg/cm2 and mud volume is 0.8 L/S, mud becomes a solid pie after dehydration, solid recovery is above 92% and moisture content is below 40%.
提高《生物工程设备》课程教学质量的探索与实践
陈必链,郑毅,陈建平,
微生物学通报 , 2007,
Abstract: 《生物工程设备》是生物工程专业本科生的学科专业课程。针对《生物工程设备》课程的教学现状,本着调整课程教学体系、优化教学内容、革新教学方法和手段、重视实践教学基地建设和师资队伍建设、注重培养学生创新能力等形式和原则,对课程进行了教学改革和实践。
提高《生物工程设备》课程教学质量的探索与实践
陈必链,郑毅,陈建平,
微生物学报 , 2007,
Abstract: 《生物工程设备》是生物工程专业本科生的学科专业课程。针对《生物工程设备》课程的教学现状,本着调整课程教学体系、优化教学内容、革新教学方法和手段、重视实践教学基地建设和师资队伍建设、注重培养学生创新能力等形式和原则, 对课程进行了教学改革和实践。
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