Development of environmental management system in China's financial sector

The establishment of the environmental management system in the financial sector can be effectively promoted through the introduction of the environmental protection concept and its implementation by the financial sector. The impact of a sustainable development system on the sector is analyzed in this article from three aspects: environmental risk assessment, financing support for environmental protection projects, and financial services to environmentally friendly corporations and individuals. Influential factors on the development of the environmental management system in China’s financial sector are discussed from the perspective of various entities such as financial institutions, financial regulation authorities, environmental protection departments, corporations, and the public. It is pointed out that China’s financial sector is now in the transitional phase from a defensive attitude to a preventive attitude. Strengthening governmental guidance, the supervision of regulators as well as public awareness of environmental protection should be used to enhance the initiative in the development of the environmental management system in the Chinese financial sector.     

江宁区生态文明建设的实践与思考

南京市江宁区通过优化产业结构、提升环境治理、构筑生态新城等举措,打牢生态文明建设的现实基础。但对照国家生态文明示范区标准,在经济、社会、制度方面仍存在诸多制约因素。为此需逐步确立以科学规划为先导,以制度建设为根本,以产业转型为抓手,以乡村建设为载体,以生态德育为基点的生态文明建设思路。     

造纸污泥固化/稳定化处理技术研究

为了能更好地无害化处理造纸污泥,对造纸污泥的固化/稳定化处理技术进行了研究。以水泥、粉煤灰和煤渣作为固化剂对造纸污泥进行固化/稳定化处理。通过抗压强度评价污泥固化块的力学性质;并对固化块浸出液的COD浓度与重金属质量浓度进行了检测。当水泥、粉煤灰和煤渣的掺量分别为0.12、0.02和0.10 kg/kg,养护时间为6 d时,固化块抗压强度达到360 kPa。结果表明,水泥和煤渣对提高造纸污泥固化块的抗压强度具有促进作用,而它们与粉煤灰对造纸污泥中的有机质和重金属均具有一定的固化作用。在以上条件下,固化块浸出液中COD浓度约为115.7 mg/L,重金属浓度符合国家标准。经养护后的固化块含水率均保持在35%~40%,符合填埋场的进场标准。     

重金属捕集剂的应用进展研究

从源头减少重金属排放是控制重金属污染的重要途径,采用重金属捕集剂处理含重金属废水时,不仅可有效去除重金属,得到的沉淀渣可进一步回收处理,具有广泛的应用前景.重金属捕集剂结构可分为线性结构及空间立体架桥结构,捕集剂的作用机理主要通过官能团与重金属离子配位结合,生成不溶性螯合物沉淀,均对废水重金属具有良好的去除效率.生产成本较高是制约其广泛应用的一个主要因素,开发成本低廉、高效、工艺简单的重金属捕集剂,并寻求与其他改性技术联用,是重金属捕集剂的重要研究方向.     

膜法再生水项目费用效益综合评价体系探讨

利用再生水是缓解水资源紧张状况的有效途径之一,膜法水处理技术是生产高品质再生水的重要技术手段。为提高膜法再生水项目投资效益,作为项目科学决策和管理的支持,需要探索建立一套针对性强和科学合理的项目费用效益综合评价体系。采用层次分析法,选择数类适宜的评价指标,初步构建出了针对“膜法再生水项目费用效益综合评价”为目标,以“投资费用评价、国民经济效益”等5项指标为准则层和“建设吨水投资、运行成本”等14个指标为指标层的综合评价指标体系。     

Leaching of Cu,Cd, Pb,and phosphorus and their availability in the phosphate-amended contaminated soils under simulated acid rain

Environmental Science and Pollution Research - Phosphate amendments have been used to immobilize heavy metal-contaminated soils. However, phosphate amendments contain large amounts of phosphorus,...     

Isolation and application of predatory <Emphasis Type="Italic">Bdellovibrio</Emphasis>-and-like organisms for municipal waste sludge biolysis and dewaterability enhancement

Bdellovibrio-and-like organisms (BALOs) are a group of ubiquitous and obligate predatory bacteria and commonly used as biocontrol agents. In this study, an efficient, environmental-friendly, and convenient BALOs encouraged municipal waste sludge biolysis pretreatment technique was developed and investigated for dewaterability enhancement of excess waste sludge. The indigenous predatory BALOs were successfully isolated from the sludge for biolysis treatment. Without any chemical addition or pH adjustment, the sludge specific resistance (SRF) and capillary suction time (CST) were significantly reduced by as high as 53.4% and 23.8%, respectively within 24 h’s treatment, which would further be lowered with the increase of BALOs input dosage. However, the continuous extension of reaction time would worsen the sludge dewaterability. The decreases of SRF and CST accompanied with the increases of sludge disintegration degree and soluble chemical oxygen demand, nitrogen, and phosphorus concentrations all emphasized the contributions of BALOs’ predation activities to sludge disturbance, cell lysis, and consequently the release of sludge intracellular water to finally effectively improve the sludge dewaterability and disposal efficiency.

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电场中沉降粉体接触粘结力的分析

应用接触电位差理论和高斯定理,分析了电除尘器收尘极板上沉降粉尘粒子与极板间的双电层现象,继而探讨了两者间的接触粘结力,建立了粘结力与物质材料电子逸出功的关系。研究表明,紧密接触的沉降粉尘粒子与极板间的接触粘结力与它们各自的电子逸出功之差成正比。这一粘结力是阻止微细粉尘脱离收尘极板的一个重要因素。     

硝基苯的蓄积毒性和氧化损伤

以小鼠为对象,对硝基苯(NB)的蓄积毒性和氧化损伤进行研究,检测SOD,GSH-Px,CAT,MDA和蛋白质羰基含量.结果表明,蓄积系数(K)为4.76;亚急性试验随着染毒剂量的加大,肾脏和脾脏的MDA含量逐渐升高,CAT,SOD和GSH-Px[酶活性逐渐降低,蛋白质羰基含量呈上升趋势,并表现出明显的剂量效应.表明NB对肾脏和脾脏具有明显的毒性作用,NB可使自由基在机体内累积,引起蛋白质氧化损伤,导致机体发生氧化应激.     

掺Al-TiO2改性膨润土去除微污染水中COD和NH4-N

采用掺Al-TiO2作为改性剂制备改性膨润土,考察了微波辐射功率、辐射时间、TiO2改性剂用量、铝盐掺杂量、pH值对微污染水中COD和NH4-N去除效果的影响。实验表明,微波辐射功率为460 W,辐射时间为8 min,TiO2改性剂用量为1.3 mmol/g,铝盐掺杂量为0.2 mmol/g为最佳制备条件。pH值为6.0,改性膨润土投加量为40 mg/L,沉淀时间为30min时,对微污染水中初始浓度15 mg/L的COD和5 mg/L的NH4-N去除率分别达到92%和59%以上。