从钛铁渣中回收有价成分钛和铝的研究──（－）回收钛的研究

本文提出了一种从钛铁渣中提取钛和铝的方法。研究了硫酸酸解、浸取钛铁渣及溶剂萃取法选择性萃取钛的条件，使钛与酸解液中的铝、铁得以有效分离，经洗涤、反萃，最后以钛白粉形式回收钛，纯度大于９８％，钛的回收率约为９３％．     

采用EGSB+TCBS工艺处理有机颜料废水的实例

以某生产有机颜料厂家为例,介绍了EGSB TCBS处理工艺.当废水中CODCr质量浓度为7 000～8 000mg·L-1,NH3-N质量浓度为200～300 mg·L-1,SS的质量浓度为1 000～2 000 mg·L-1时,采用该工艺处理后,出水ρ(CODCr)＜1 000 mg·L-1,ρ(NH3-N)＜30 mg·L-1,ρ(SS)＜500 mg·L-1.表明EGSB TCBS工艺适应于有机颜料废水的处理,且工艺运行便利,剩余污泥量小.     

苦瓜子衣色素稳定性的初步研究

研究了苦瓜子衣色素对pH值、糖类及浓度变化的稳定性.结果表明色素在偏酸性或偏碱性的条件下都会加速降解,各种糖类除半乳糖外对色素的降解均有促进作用,而色素的浓度越高,降解越快.     

一株产黑褐色色素海洋放线菌的研究

从舟山群岛潮间带海域中分离到一批产色素的海洋放线菌,用滤纸片法进行抑菌试验,并对目标菌株进行鉴定,然后对其所产色素进行粗提,测色素的最大吸收波长,研究理化因子对其影响.结果表明筛选到产黑褐色色素的菌株B2,其对Vibrio parahaemolyticus和Escherichia coli具有较好的抑制作用,色素初步研...     

HgCl2对斜生栅藻（Scenedesmus obliquus）生理生化特性的影响(Effects of HgCl2 on Physiological and Biochemical Characteristics of Scenedesmus obliquus)

为探讨汞对藻类的毒性效应,以斜生栅藻(Scenedesmus obliquus)为实验材料,检测了HgCl2对藻细胞数目、光合色素含量、超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量等生化指标的影响.结果表明,各暴露组(0.2～1.5mg·L-1)HgCl2对斜生栅藻的生长均有抑制作用,随HgCl2暴露浓度的增大,藻细胞密度逐渐降低,HgCl2对斜生栅藻的48、72、96hEC50值分别为1.194、1.113、0.986mg·L-1.随着HgCl2暴露浓度的升高(0.01～1.5mg·L-1),叶绿素a、b及类胡萝卜素等光合色素含量均呈逐渐降低趋势;SOD活性表现为先激活后抑制;MDA含量则显著增加(p<0.05,p<0.01).     

Bioprocess technology for coal washery effluent treatment by Lemna minor

Duckweed species are promising macrophytes that can be used in wastewater treatment due to their rapid growth, ease of harvest, low fiber feed potential, and high protein contents. Waste‐water contaminants that are likely to be generated during washing of coal are total suspended solids (TSS), chemical oxygen demand (COD), acidity or alkalinity (pH), and metallic contaminants. Bioprocesses were developed to evaluate the potential of duckweed (Lemna minor) to treat coal washery effluent (CWE) as well as to study the impact on the biochemical changes of the Lemna minor. CWE samples were diluted with distilled water (DW) in different ratios as follows: T1‐CWE:DW(20:80%), T2‐CWE:DW(40:60%), T3‐CWE:DW(60:40%), T4‐CWE:DW (80:20%), T5‐CWE (100%), and Control‐DW(100%). The electrical conductivity of the effluent treated with Lemna minor was 0.035 deciSiemens per meter (dS/m) in the control at Day 10 and substantially higher at treatment ratios of 100, 80, and 60 percent (1.754, 1.842, and 1.631 dS/m). The highest amount of TSS was observed at test ratio T5 (38,834 mg/L), followed by T4 (28,816 mg/L), T3 (26,970 mg/L), T2 (15,320 mg/L), T1 (4,524 mg/L), and control (424 mg/L). Total hardness was higher (820 mg/L) in T4 compared to the control (220 mg/L). Total hardness of the effluent decreased after 30 days of incubation in all the treatment aliquots. The CWE at 20 percent concentration increased the duckweed population and no adverse impacts on its growth were observed. At higher concentration (T5) total mortality of Lemna minor was observed. The chlorophyll production was determined to be inversely proportional to the effluent concentration. Based on this study, it is concluded that Lemna minor can be used for treating CWE after dilution with fresh water.     

低温对高产杂交稻抽穗期剑叶光合色素含量和抗氧化酶活性的影响

以高产杂交稻“两优培九”和常规杂交稻“汕优63”为试验材料,采用15和20℃处理2和4 d,比较低温对水稻抽穗期剑叶光合色素含量和抗氧化酶活性的影响。结果表明:低温下抽穗期水稻剑叶光合色素(叶绿素、类胡萝卜素)含量随处理时间延长而下降,抗氧化酶CAT活性下降,SOD、POD活性变化存在品种间差异。低温处理4 d后,“两优培九”SOD活性上升,POD活性降低,“汕优63”变化则相反。抗氧化酶之间活性变化的不平衡,使活性氧的产生与清除失衡,O2-迅速积累,膜脂过氧化加剧,MDA含量上升。这些变化导致水稻剑叶净光合速率在低温下降低。试验结果表明,高产杂交稻“两优培九”比常规杂交稻“汕优63”对低温的适应能力更强。     

香根草等三种植物的抗盐性比较

盐度对香根草、百喜草和水花生３种草本植物生长发育的影响相当明显．植物体,尤其是茎叶内的Ｎａ＾＋和Ｃｌ＾－直接影响到植物的株高、分蘖数、叶面积、根长等生长指标,进而影响到生物量;但在盐胁迫下,生物量的下降幅度不及上述４个指标的降幅大,根系生物量的降幅又不及茎叶的降幅。叶片光合色素亦受Ｎａ＾＋或Ｃｌ＾－的影响。在盐度不高时,色素含量增加,盐度较高时,色素含量下降,但它的幅度远不及生物量的下降幅度大。     

氧化-生化-气浮组合工艺处理偶氮型颜料废水

针对偶氮型颜料废水的水质特征,采用氧化-生化-气浮组合工艺进行处理,并注意对各工艺段进行控制和调节。工程实践表明,这一工艺治理偶氮型颜料废水,出水水质稳定,能够达到国家污水综合排放一级标准。     

Co对绿色巴夫藻超微结构的影响

利用电镜技术探讨金属离子Ｃｏ对绿色巴夫藻超微结构的影响。实验结果表明，一定浓度的Ｃｏ可导致细胞色本肿涨，类囊体片层受破坏，细胞质膜不完整，液泡增多变大，核内异染色质增多边聚，同时还对线粒体产生不同程度的影响。初步证实Ｃｏ对藻细胞的两大能量供应系统色素体和线粒体有不同程序的影响，使细胞能量供给受限制，影响藻正常的生长代谢。