The oxidation of octanoic acid by cultured amniotic fluid cells: The effect of cell type and passage number

We have measured the rate of oxidation of [1⁻¹⁴C]octanoate in cultured amniotic fluid (AF) cells at various passages and in AF cell lines with different clonal morphology. It is possible that both the passage number and the cell type may influence the outcome of prenatal diagnosis of fatty acid oxidation defects using this technique. We found that there was no significant difference between the three major AF cell types (epithelial, large epithelial, and fibroblast) when analysed at identical passage number but there was a significant reduction in octanoate oxidation in all cell types with increasing passage. For reliable prenatal diagnosis, cell lines of similar low passage number should be used.     

大孔树脂对邻苯二甲酸的吸附研究

研究了XDA-200大孔树脂对水溶液中邻苯二甲酸的吸附。结果表明XDA-200树脂对水溶液中的邻苯二甲酸吸附速度很快，30min内基本达到平衡，其后达到完全平衡的吸附进程非常缓慢。树脂对邻苯二甲酸的吸附量随质量浓度增加而增加。pH值降低，有利于邻苯二甲酸在溶液中以分子态存在，易于树脂吸附。邻苯二甲酸的吸附均满足Freundlich和Langmiur等温吸附方程。泄漏点与进水浓度和流速均有很大关系。     

利用糠醛渣生产高吸附性粉状活性炭

介绍了采用磷酸作活化剂，将糠醛渣制成活性炭的最佳工艺条件。产品活性炭的脱色力及磷酸消耗成本等指标均达到预期理想目标     

硫铁矿生产硫酸的废水治理

电石渣中和－精密微孔过滤技术治理硫酸废水的工艺简洁、可靠，占地面积小，运行费用低，出水优于国家二级排放标准。     

Metagenomic insights into responses of microbial population and key functional genes to fulvic acid during partial nitritation

The long-term impact of fulvic acid (FA) on partial nitritation (PN) system was initially examined in this study. The obtained results revealed that the FA lower than 50 mg/L had negligible effect on the nitrite accumulation rate (NAR nearly 100%) and ammonium removal rate (ARR 56.85%), while FA over 50 mg/L decreased ARR from 56.85% to 0.7%. Sludge characteristics analysis found that appropriate FA (<50 mg/L) exposure promoted the settling performance and granulation of PN sludge by removing Bacteroidetes and accumulating Chloroflexi. The analysis of metagenomics suggested that the presence of limited FA (0-50 mg/L) stimulated the generation of NADH, which favors the denitrification and nitrite reduction. The negative impact of FA on the PN system could be divided into two stages. Initially, limited FA (50-120 mg/L) was decomposed by Anaerolineae to stimulate the growth and propagation of heterotrophic bacteria (Thauera). Increasing heterotrophs competed with AOB (Nitrosomonas) for dissolved oxygen, causing AOB to be eliminated and ARR to declined. Subsequently, when FA dosage was over 120 mg/L, Anaerolineae were inhibited and heterotrophic bacteria reduced, resulting in the abundance of AOB recovered. Nevertheless, the ammonium transformation pathway was suppressed because genes amoABC and hao were obviously reduced, leading to the deterioration of reactor performance. Overall, these results provide theoretical guidance for the practical application of PN for the treatment of FA-containing sewage.     

降雨氢离子浓度的参数化研究

对酸雨模式中降雨的物理过程进行了简化假设，在此基础上研究了大气中影响降雨氢离子浓度的几种主要污染物（ＳＯ２ ，ＶＯＣｓ ，ＮＨ３ ，ＮＯｘ） 及温度、天顶角、雨强等因素同降雨氢离子浓度的参数关系     

聚四氟乙烯生产中副产氯化氢及盐酸处理的安全技术措施

简要介绍聚四氟乙烯生产中副产氯化氢及盐酸的处理方法.根据氯化氢和盐酸的特性,设计了相应的安全技术措施,以保证安全生产.     

用废盐酸和劣质高岭土生产聚合氯化铝的研究

采用废盐酸和劣质高岭土生产聚合氯化铝技术，对试验原料、设备、内容等作了介绍，结果表明，该项技术不仅解决了某化工厂副产 浓度含氟盐酸的出路问题，而且综合利用了当地的矿产资源，实现了经济效益、环境效益和社会效益的统一。     

电渗析治理糠醛废水过程性能的研究

糖醛废水含１．０％－２．５％的乙酸，直接外排，污染环境，浪费资源，通过３０－８０对膜，４００ｍｍ×８００ｍｍ隔板组装的电渗析器中型试验，脱除其中９５％以上的水，回收得到浓度为２０％的乙酸，再经萃取，精馏得到９９％工业乙酸，治理后的废水含酸量小于０．０２％，可安全排放或回用。对影响极限电流，过程效率的因素进行了探讨，导出工艺特性的经验式，提出相应特性常数。