砷

By leaching experiment in soil columns, the purification and migration characteristics of arsenic in loessial soil were stud-ied.

通过土柱淋滤试验，从动态角度研究了黄土性土壤对砷的净化作用及迁移规律。

There is representative meaning to researching the action of Cr and As in loessial soil.(3) By experiments the paper reveals purification mechanism and ability and its influencing factors of soil to Cr and As.

2分析了由于农事和水事活动所发生的土层入渗水中的污染元素，确定了毒性强、数量大、易迁移的铬、砷作为主要研究对象，研究其在黄土类土中的行为作用有代表性意义。

The results indicate:1 The main action to purifying Cr in the loessial soil is that Cr changes into Crs.

3开展试验从静态角度揭示土壤对铬、砷的净化机制、净化能力及影响因素。

Between Cr and As have possibly promotion to absorption amounts in loessial soil.(6) Utilizing infiltration experiment of soil column, the results show that environmental capacity of Cr and As in loessial soil is 95.9kg/ha and 12.6kg/ha.

6在全面阐述土壤环境容量模型的基础上，用土柱淋滤试验方法研究首次得出了黄土类土中铬、砷的土壤环境容量分别为95.9kg／ha和12.6kg／ha。

By the infiltration test of soil column, the author concludes that Cr and As has the following migration patterns by dynamic researches. 1 The absorption and migration of Cr and As in loessial soil relate to content of mucilaginous grain.

4通过土柱淋滤试验，从动态角度研究得出铬、砷在黄土中具有以下迁移规律及特点：①Cr、As在黄土中的吸附和迁移与土壤中的粘粒含量有关。

Soil Science Department, Rothamsted Research, Harpenden, Hertfordshire AL5 2JQ, U.K., School of Earth and Space Science, University of Science and Technology of China, Hefei, Anhui 230026, China, and School of Biological Sciences, University of Aberdeen, Cruickshank Building, St. Machar Drive, Aberdeen, AB24 3UU, U.K.

在发表于8月1日出版的《环境科学与技术》的一篇论文中，英国洛桑研究所的赵方杰及其同事比较了淹水种植的水稻与旱作种植的水稻之间的砷水平，淹水种植水稻是南方国家最传统的耕作方法，而旱作种植水稻则指的是不把水稻根部浸于水中的做法。

It was shown that the atmosphere was changing from coal-burnt to petrol-burnt and organic pollution was serious in water, especially NH 3-N,BOD 5, Arsenide and Mercuride solid discharge was increasing year by year and the noise environment is getting better.

结果表明，广州市大气环境污染已由煤烟型向石油型转变；水环境中有机污染严重，主要表现为氨氮、BOD5、砷化物和汞化物污染；固体垃圾产出量逐年增加；声环境在逐步好转

The ore belongs to typical As and S bearing microgranular refractory gold ore.

肃北县黑刺沟金矿属砾岩型金矿，该矿矿石属典型的含砷、硫微细粒难选金矿石。

Arsenic; TiO_2-pillared interlayer montmorilonite; Doped; Desorption; Regeneration

工程科技II，工业通用技术及设备，工程基础科学砷；钛柱撑蒙脱石；掺杂；脱附；再生

Because this method is simple,rapid and very sensitive,it can be applied to the determination of trace arsenic in Morchella .

该方法简单快速，灵敏度高，可作为药用真菌羊肚菌中微量砷的测定方法

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。