黄铁矿

The results show that jamesonite and pyrrhotite have good floatability in the pH range of 2-10 and marmatite has good floatability in the acid and it is difficult to separate these minerals. In the pH range of 6-8, the separation of jamesonite and pyrrhotite, marmatite is possible when using mercaptoacetic acid and mercaptoethanol as depressants. In case of the presence of Cu2+ ion, however, it is difficult to separate the three minerals. Infrared spectrum demonstrates that there are a number of function groups such as —SH,—COOH,—OH in the molecular structure of depressant.

结果表明：用丁黄药作捕收剂，脆硫锑铅矿和磁黄铁矿在pH 2~10范围内都有良好的可浮性，铁闪锌矿在酸性条件下可浮性好，三者分离困难；在pH 6~8之间，采用巯基乙酸和巯基乙醇作抑制剂，脆硫锑铅矿与磁黄铁矿和铁闪锌矿的分离是可能的；但铜离子存在时， 3种矿物之间的选择性分离是难以实现的。

The XRD and SEM/EDX analyses demonstrated that minerals in Beijing PM10 were clay and quartz, plagioclase, potassium feldspar, albite, calcite, dolomite, hematite, pyrite, magnesite, gypsum, and laumontite, in descending order.

XRD及 FESEM/EDX单颗粒分析表明，北京市PM10中的矿物颗粒以粘土矿物和石英为主，另外还有斜长石、钾长石、钠长石、方解石、白云石、赤铁矿、黄铁矿，菱镁矿、石膏、浊沸石等，矿物颗粒表面的硫化现象常见。2002特大沙尘暴颗粒物中的矿物的含量自大到小分别为粘土矿物、石英、斜长石、方解石、钾长石、赤铁矿、黄铁矿、角闪石和石膏。

The experiment showed that As and lignosulphonate in solution could inhibit the growth of the strains.

经过研究，发现砷对氧化亚铁硫杆菌的生长有较大的抑制作用；氧化亚铁硫杆菌对砷黄铁矿的氧化速率明显快于黄铁矿，前者可达，0.2gFeAsS／L·h大约7倍于黄铁矿的氧化速率。

The results show that the maximum growth quantity of Nocardia can be achieved after culturing 120 h and obvious selective adsorption of Nocardia on the surface of pyrite and sphalerite can be detected. The maximum adsorption rate on the surface of pyrite is 96.99%, whereas it is less than 20% in the case of sphalerite. Adsorption equilibrium can be attained within 20 min on the surfaces of the two minerals. pH value is the key factor influencing upon selective adsorption, and the difference of adsorption quantity on the surfaces of two minerals is apparent when pH is between 4 and 10. Slurry concentration over 6 g/L is favorable to selective adsorption. Nocardia cell concentration, stirring speed and temperature have no obviously effect on selective adsorption.

结果表明：培养120 h后诺卡氏菌达到最大生长量；诺卡氏菌在黄铁矿和闪锌矿表面发生明显的选择性吸附，在黄铁矿表面的最大吸附率可达到96.99％，而在闪锌矿表面的吸附率大都在20％以下；诺卡氏菌在两种矿物表面于20 min内即可达到吸附平衡； pH值是影响诺卡氏菌在两种矿物表面发生选择性吸附的关键因素， pH在4～10之间时，选择性吸附现象明显；矿浆浓度超过6 g/L时有利于发生选择性吸附；细胞悬浊液浓度、搅拌速度和温度对吸附效果影响不大，均可产生选择性吸附。

Through electron probe and ICP-MS analyses, we found that Sn may account for 0.23% in oolitic pyrite and (0.06)% in colloidally structured pyrite.

通过电子探针背散射图象扫描分析，发现鲕状黄铁矿和胶状结构黄铁矿中存在锡石包体，大小2～5μm。

In order to solve these problems, supported by Foundation for University Key Teacher by the Minisity of Education, we study on distribution of sulfur in coal samples of ShenYang HongYang No. 3 coal mine and find that the sulfur in pyrite is more than 72％ in the total sulfur of the coal. The pyritic sulfur immerges in coal and is diffcult to be removed by common methods.

针对上述问题，我们在教育部高等学校骨干教师资助计划的支持下，以沈阳红阳三矿煤为试样，对其中硫的的赋存状态进行了研究，发现该试样中的硫有72％以上为黄铁矿硫，而且黄铁矿多数呈细小颗粒浸染于煤的有机质中，用常规分选方法脱除比较困难。

The high sulfur coal from Jiexiu in Shanxi is used in this experiment and the influence of removing pyritic sulfur by adding different pyrites depressors on the process of agglomeration was explored in this study,The experiment result shows that adding pyrites depressors on the process of oil agglomeration can improve the sulfur-removing rate.

油团聚是以脱除煤中灰分为主的团聚技术，脱硫的效率很低，采用山西介休的高硫煤，探索在油团聚过程中加入不同的黄铁矿抑制剂(巯基乙酸、重铬酸钾、高锰酸钾)对脱除煤中黄铁矿硫的影响。结果表明加入黄铁矿抑制剂对脱硫效率有一定程度的影响

These experiment investigztions indicate: When coal is under high heating pyrolytic condition, the pyrite in coal decomposes very quickly, some amount of pyritic sulfur is transformed to organic sulfur and 〓 char, the volatile waterial in coal will restrain the transformation.

根据这一些试验研究得出：煤在快速热解条件下，煤中的黄铁矿的热分解极快，黄铁矿热分解的一部分硫转化成有机硫而存留在残炭中，煤中挥发份对这种硫的转化起抑制作用。

Fossil diagenetic characteristics of Conotubus indicate that pyritization initiated firstly and calcite infilling followed.

锥管虫的化石成岩学特征表明黄铁矿最先沉淀，随后方解石充填于黄铁矿留下的空隙或空腔中。

Organic carbon-limited diagenetic pyrite added to the earlier formed syngenetic pyrite, which was controlled by the time that iron minerals remained in contact with H2S in anoxic waters.

其中以成岩黄铁矿为主，其形成过程主要受有机质限制，而同生黄铁矿受铁矿物与H2S接触时间的限制。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。