合成洗涤剂废水处理的一种新工艺研究

在合成洗涤剂废水絮凝床预处理技术（ＣＦＢ）的实验研究基础上，成功地应用ＣＦＢ法配以简单的ＳＢＲ生化法处理了该类废水。为合成洗涤剂废水治理开辟了一条新的途径。     

酸雨对汉白玉的危害研究

采用模拟的方法研究了酸雨对天然汉白玉危害，研究结果表明，酸雨对汉白玉石材的危害主要是溶解腐蚀。根据数量统计获得了影氧化钙损失的因素和腐蚀速率“ｂ”以及腐蚀的规律。     

Vertical fluxes of volatile mercury over soil surfaces in Guizhou Province, China

ＶｅｒｔｉｃａｌｆｌｕｘｅｓｏｆｖｏｌａｔｉｌｅｍｅｒｃｕｒｙｏｖｅｒｓｏｉｌｓｕｒｆａｃｅｓｉｎＧｕｉｚｈｏｕＰｒｏｖｉｎｃｅ，ＣｈｉｎａＦｅｎｇＸｉｎｂｉｎ，ＣｈｅｎＹｅｃａｉ，ＺｈｕＷｅｉｇｕｏＳｔａｔｅＫｅｙＬａｂｏｒａｔｏｒｙｏｆＥｎｖｉｒ...     

粉锻件预制坯的设计

讨论了粉锻件预制坯的设计内容预制坯密度的选择、形状和尺寸的设计 ,讨论了粉锻件预制坯的分类简单形状预制坯和近似形状预制坯 ,讨论直齿轮、伞齿轮、法兰件和长轴类粉锻件预制坯的设计     

内凸筋口琴管连续挤压模具

内凸筋口琴管,是汽车空调的一种新型散热管.具有散热效果好、单位面积小、重.量轻等优点.此文介绍了连续挤压内凸筋口琴管模具的设计方法及其模具芯头的冷挤压加工.     

炼油污水污染源分析及源头控制

分析炼油污水的污染源，了解炼油污水的种类及成因。提出源头控制及治理措施。实现减水污水产生量，降低污染负荷、增产不增污的目的，确保污染物排放总量控制要求。     

硫酸盐还原菌(SRB)污泥固定化技术污泥选择的研究

以某污水厂的氧化沟污泥和剩余污泥为培养对象,获得了SRB占优的厌氧污泥,分析了活性污泥厌氧驯化过程中微生物的分布规律,考察了不同种类SRB污泥固定化小球处理水中硫酸根、锌及镉的效果.结果表明:pH6.0～7.0,温度35℃,硫酸盐浓度4g/L,时间在24h时,剩余污泥固定化小球处理含Zn(II)400mg/L的废水,去除率达到100%,氧化沟污泥固定化小球Zn(II)的去除率为90%左右;对500mg/L含镉废水,剩余污泥固定化小球8h能去除水中95?(II),氧化沟污泥固定化小球对Cd(II)的去除率为80%.硫酸盐还原菌污泥固定化技术中剩余污泥优于氧化沟污泥.     

城市固体废物的灰色预测与评价

对城市固体废物中长期预测，由于影响因素较复杂，采用常规回归分析模型预测，一般精度较低，且要求数据充分。采用灰色预测模型，以杭州市固体放心物历年实际数据进行拟合性预测。结果表明，该模型对城市固体废物作中长期预测，其预测的准确率可达９３－９９％之间，能较好满足环境规划预测的需要。     

Cause of PM2.5 pollution during the 2016-2017 heating season in Beijing, Tianjin, and Langfang, China

To investigate the cause of fine particulate matter (particles with an aerodynamic diameter less than 2.5 µm, PM_2.5) pollution in the heating season in the North China Plain (specifically Beijing, Tianjin, and Langfang), water-soluble ions and carbonaceous components in PM_2.5 were simultaneously measured by online instruments with 1-hr resolution, from November 15, 2016 to March 15, 2017. The results showed extreme severity of PM_2.5 pollution on a regional scale. Secondary inorganic ions (SNA, i.e., NO₃^?+SO₄²+ NH₄⁺) dominated the water-soluble ions, accounting for 30%-40% of PM_2.5, while the total carbon (TC, i.e., OC + EC) contributed to 26.5%-30.1% of PM_2.5 in the three cities. SNA were mainly responsible for the increasing PM_2.5 pollution compared with organic matter (OM). NO₃^? was the most abundant species among water-soluble ions, but SO₄^2- played a much more important role in driving the elevated PM_2.5 concentrations. The relative humidity (RH) and its precursor SO₂ were the key factors affecting the formation of sulfate. Homogeneous reactions dominated the formation of nitrate which was mainly limited by HNO₃ in ammonia-rich conditions. Secondary formation and regional transport from the heavily polluted region promoted the growth of PM_2.5 concentrations in the formation stage of PM_2.5 pollution in Beijing and Langfang. Regional transport or local emissions, along with secondary formation, made great contributions to the PM_2.5 pollution in the evolution stage of PM_2.5 pollution in Beijing and Langfang. The favourable meteorological conditions and regional transport from a relatively clean region both favored the diffusion of pollutants in all three cities.     

Toxicity of copper, lead, and cadmium on the motility of two marine microalgae Isochrysis galbana and Tetraselmis chui

Computer assisted movement tracking was used to characterize the motility of two marine microalgae, Isochrysis galbana and Tetraselmis chui, and to investigate the toxicity of Cu, Pb, and Cd on motile percentage, curvilinear velocity, average path velocity, straight line velocity, linearity, straightness, and wobble. Except for motile percentage, all other motility parameters di ered significantly between I. galbana and T. chui. Based on relative motile percentage data, the median e ective concentration (EC50) of Cu on the motility of I. galbana and T. chui was 31.4 and 1.3 mol/L, respectively, while for Pb it was 37.8 and 10.9 mol/L and for Cd it was 121.6 and 37.8 mol/L, respectively. Compared to I. galbana, T. chui was more sensitive to all tested metals. The toxic e ect of the heavy metals on motility exhibited the following decreasing order for both species: Cu > Pb > Cd. Our results indicate that I. galbana and T. chui motility is sensitive to heavy metals and can be used as an indicator for toxicology bioassays.