油漆桔皮的影响因素及防治方法

分别从车身板材、油漆材料、涂装工艺及喷涂设备等方面对油漆桔皮的影响因素进行了分析和讨论,并提出了防止油漆桔皮的方法。     

柚子皮吸附活性艳蓝KN-R和活性艳橙X-GN性能研究

采用间歇实验,考察了初始pH、柚子皮投加量、柚子皮粒径、离子强度、染料初始含量及接触时间对柚子皮去除废水中的活性艳蓝KN-R及活性艳橙X-GN这2种染料影响。结果表明,酸性pH条件下吸附效果良好,柚子皮能有效地去除废水中的KN-R和X-GN,对KN-R和X-GN的去除率达到97.48%和95.63%;柚子皮粒径变化对吸附效果影响不明显,吸附时间宜控制在480 min以上。柚子皮可作为一种新型吸附剂应用于活性染料废水的处理,作为一种农业废物的资源化加以利用。     

DNA ADDUCTS AS A BIOMARKER OF POLLUTION: FIELD STUDY ON THE GENOTOXIC IMPACT EVOLUTION OF THE ERIKA OIL SPILL ON MUSSELS (MYTILUS EDULIS) OVER A PERIOD OF ELEVEN MONTHS

After the Erika oil spill in December 1999, several thousand tons of heavy fuel were released in marine environment and polluted the Atlantic French coast. DNA adducts were used as a biomarker of the Erika genotoxic impact on DNA of mussel digestive gland sampled at 15 locations from Finistère to Vendée county during a period of 11 months after the accident. Mussels collected in the impacted sites in December 1999 and January 2000 showed the highest total DNA adduct level (165 adducts/10⁸ nucleotides). The level decreased dramatically in February 2000 to a stable level through the rest of the year. The site considered as reference zone was also impacted just after the Erika oil spill. The DNA adduct patterns are similar at all locations, indicating a common genotoxic impact along the coast. Two adducts persisted and were used to characterize and follow the Erika genotoxic impact. The analysis revealed that mussels from three sites (respectively Finistére, Loire Atlantique, and Vendée counties) have been highly impacted by the Erika oil spill.