污染

The results of research on the factors affecting titanium tannage show that high concentration NaCl medium has larger negative effect on titanium tannage. When the NaCl concentration exceeds 5%, the titanium tanning action is reduced rapiddly. Traditional NaCl pickling is unsuitable for titanium tannage, tanning in water medium directly, the best tanning effect can be obtained, so titanium tanning can not only eliminate chrome pollution, but also diminish salt pollution. The optimum tanning conditions for HPZ-Ti tan liquor are pH3. 5, TiO〓 offer of 7. 5%(based on the weight of 65% moisture pelt), the best Bascity of tan liquor is between 30% and 50%.

以HPZ—Ti鞣液为基础，研究了不同鞣制介质，鞣制pH值，鞣剂用量和浓度，鞣液的碱度，不同提碱剂，不同的预处理和后处理等因素对钛鞣的影响，结果表明：高浓度的NaCl溶液介质对钛鞣有很大的负面作用，当介质NaCl浓度超过5%，革内钛的结合量和革的Ts明显降低，传统的高浓度NaCl浸酸工艺不适合于钛鞣，在水介质中直接鞣制效果最好，所以钛鞣不仅消除了铬污染而且大大降低了盐的污染。

Tannery waste water pollution due to the complicated, pollution load, the harm caused to the environment is particularly serious.

由于制革废水的污染成分复杂、污染负荷大，给环境造成的危害特别严重。

Participate in contamination meeting termly, discuss and improve the contamination problems in process or the potential problems.

定期参加车间污染小组的会议，对生产过程中出现的以及潜在的污染问题进行讨论，并提出相应的改进措施，确保车间的

Tetraethyl lead is usually added to gasoline as an anti-detonating agent.

铅及其化合物都有毒，致使铅污染和中毒成为重金属污染中之最重。

M obtained from the Guanting Reservoir were mixed with nitrate copper solution to study the distribution characteristics of copper ions adsorbed on the surface of sediment particle s.

现有的水体中泥沙与污染物质关系方面的研究，多着重于吸附模式的理论探讨和吸附总量的实验研究，而对泥沙颗粒的表面形态和污染物质在泥沙颗粒表面的分布研究较少。

In order to study the origin of the particilate nitrogen and phosphorus PN (P nonpoint source pollution there, so as to get it under control, some artificial rainfall experiments was made around Guanting Reservoir, the results show that the correlation between transporting rate of PN and yielding rate of sediment is very good, with the average correlation coefficient 0.9594 and 0.9772 for PN and PP respectively.

为研究妫水河流域的颗粒态氮磷非点源污染来源，以控制非点源污染，在官厅水库周围进行了野外人工降雨试验。试验数据表明，氮磷输移率与产沙率具有很好的相关性，颗粒态氮、磷的平均相关系数分别为0.9594和0.9772。

The technology of anaerobic acidification -aerobic method combined with superior bacterium is used for the treatment of badly polluted water of the new Yongding River.

采用厌氧酸化—好氧工艺，并结合高效菌强化技术，对被严重污染的永定新河河水进行处理，探讨对类似污染水体资源化的方法，以解决当前严重缺水的形势。

Heat discharge by human's production and activity is the main cause of thermal pollution.

引 言 热污染，是指自然界和人类生产、生活产生的废热对环境造成的污染。

From the 1950s, environmental thermal pollution is becoming more serious, and the early prediction is of great importance for its treatment.

20世纪中期至今，环境热污染日趋严重，而早期预测对热污染的防治具有重要意义。

Some effective measures are proposed to improve the thermal environment and the thermal pollution.

本文详细分析了山地城市的热环境特征以及热污染成因，并从治理城市热污染角度提出了部分有效的治理对策。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。