手工刷漆作业环境中“三苯”污染及其防治

对不同的刷漆作业场所进行现场卫生学调查及空气中“三苯”浓度监测的结果表明,较小规模的手工刷漆作业场所“三本”浓度高于机械制造业喷漆作业场所。该文分析其产生原因,提出了防治措施。     

环氧氯丙烷和环氧丙烷副产物的综合利用

对环氧氯丙烷和环氧丙烷生产过程中产生的融产物Ｄ－Ｄ混剂和１，２－二氯丙烷，通过氯化、氨化、脱氯化氢、异松化等方法进行处理，可得到加氯化碳、四氯化烯、三氯丙烷等有用物质。Ｄ－Ｄ混剂还可直接用作农药或生产农药的原料。笔者根据该副产物综合利用的研究状部，提出了比较经济合理的利用途径。     

第3轮环保三年行动计划环境污染控制具体指标

水环境:主要污染物化学需氧量削减15％左右,氨氮削减10％左右。大气环境:主要污染物二氧化硫排放减少17万t,降尘下降至8t/km~2·月。吴泾工业区:吴泾工业区特殊污染因子基本做到达标排放。固体废物:生活垃圾无害化处置率达到80％,工业固体废物资源化利用率迟到95％。     

纳米SiO_2强化混凝处理微污染海水试验研究

对纳米SiO2与FeCl3复配使用强化混凝处理低浊微污染海水进行了实验研究,探讨了纳米SiO2强化混凝处理海水的净化效果及影响因素。试验结果表明,对于低浊微污染海水,强化混凝能有效提高微污染海水的絮凝除污效果、改善絮体沉降性能、缩短沉淀时间。试验条件下,出水浊度、UV254、CODMn和TP去除率较单独投加FeCl3(20 mg/L)分别提高3.9%、6.1%、9.5%和7.3%。     

亚甲基蓝与次氯酸钠对塔胞藻胁迫作用的比较

实验选取养殖生产常用消毒药品亚甲基蓝C16H18ClN3S.3H2O和NaClO作为外源物质,探讨二者对塔胞藻(Pyramimimonas.sp)的毒理学影响及塔胞藻在逆境状态下的适应性变化。结果表明:NaClO对塔胞藻的胁迫表现为低浓度的刺激效应,细胞生理指标变化反映出明显的氧化毒害症状;C16H18ClN3S.3H2O对塔胞藻的胁迫表现为明显的抑制作用,塔胞藻对C16H18ClN3S.3H2O的降解作用显著,细胞所受到的氧化损伤轻微。胁迫作用下叶绿素含量、叶绿素a/b值降低,SOD活力、MDA含量升高;SOD在塔胞藻的氧化抗性机制起着重要作用。     

25年前——发生在博帕尔的悲剧

25年前的12月3日,过程工业历史上最悲惨的悲剧之一在印度博帕尔的一家杀虫剂生产厂里发生了：这天午夜过后不久,甲基异氰酸酯（MIC）——一种剧毒气体,就从这家工厂里大量泄漏出来,人们也许永远不会得知死难者的确切数字,但据估计,应在2000～4000之间,受伤人数在100000人左右或更多。据调查博帕尔事故的国际医学委员会估计,截至1994年,仍有50000多人部分或完全丧失能力。     

Adsorption of Methylene Blue on magnesium silicate： Kinetics, equilibria and comparison with other adsorbents

Batch adsorption from aqueous solutions in a slightly basic medium of Methylene Blue, up to 2500 mg/L, onto synthetic magnesium silicate (Florisil) of three particle size ranges (mean diameters of 112, 200 and 425 μm) was compared to the corresponding adsorption onto activated carbon and Amberlite XAD-2. The best fit of the kinetic results was achieved by a pseudo second-order equation. The equilibrium data were found to be well represented by the Langmuir isotherm equation. Amberlite XAD-2, an unspecific adsorbent capable of adsorbing exclusively through a surface effect, exhibited a poor dye uptake, confirming that the adsorption mechanism on Florisil was due to electrostatic attraction and ion exchange. Moreover, the comparison between Florisil and the other adsorbents was performed on the basis of the evaluation of the surface area and pore volume occupied by the adsorbed dye.     

Enhanced adsorption of Methylene Blue from aqueous solution by chitosan-g-poly （acrylic acid）/vermiculite hydrogel composites

A series of chitosan-g-poly (acrylic acid)/vermiculite hydrogel composites were synthesized and used as adsorbents for the investigation of the e ect of process parameters such as vermiculite content, pH of dye solution, contact time, initial concentration of dye solution, temperature, ionic strength and concentration of surfactant sodium dodecyl sulfate on the removal of Methylene Blue (MB) from aqueous solution. The results showed that the adsorption capacity for dye increased with increasing pH, contact time and initial dye concentration, but decreased with increasing temperature, ionic strength and sodium dodecyl sulfate concentration in the present of the surfactant. The adsorption kinetics of MB onto the hydrogel composite followed pseudo second-order kinetics and the adsorption equilibrium data obeyed Langmuir isotherm. By introducing 10 wt.% vermiculite into chitosan-g-poly (acrylic acid) polymeric network, the obtaining hydrogel composite showed the highest adsorption capacity for MB, and then could be regarded as a potential adsorbent for cationic dye removal in a wastewater treatment process.     

上海低碳经济发展及城市间比较

对于特定年份某一城市低碳经济发展的成就进行评价,首先应当考察其温室气体排放总量和（总体）温室气体排放强度：更加细致一点,应当考察温室气体排放在三次产业和三次产业中主要行业的分布,以及三次产业和三次产业中主要行业的温室气体排放强度;在此基础上,可以进行城市问比较,以判断该城市在低碳经济发展国内外竞争格局中的位置。     

Regeneration of 2-amino-2-methyl-1-propanol used for carbon dioxide absorption

To improve the efficiency of the carbon dioxide cycling process and to reduce the regeneration energy consumption, a sterically hindered amine of 2-amino-2-methyl-1-propranol (AMP) was investigated to determine its regeneration behavior as a CO_2 absorbent. The CO_2 absorption and amine regeneration characteristics were experimentally examined under various operating conditions. The regeneration efficiency increased from 86.2% to 98.3% during the temperature range of 358 to 403 K. The most suitable regeneration temperature for AMP was 383 K, in this experiment condition, and the regeneration efficiency of absorption/regeneration runs descended from 98.3% to 94.0%. A number of heat-stable salts (HSS) could cause a reduction in CO_2 absorption capacity and regeneration efficiency. The results indicated that aqueous AMP was easier to regenerate with less loss of absorption capacity than other amines, such as, monoethanolamine (MEA), diethanolamine (DEA), diethylenetriamine (DETA), and N-methyldiethanolamine (MDEA).