化工园区企业环境风险分级管理研究

基于构建化工园区环境风险管理体系的重要性,参考美国国家环境保护局(USEPA)的化学品事故防范风险管理指南,提出了化工园区环境风险管理的基本框架,并将企业风险分级的思想应用到化工区风险管理中,提出了三级风险管理方案。以河南省某化工园区为例进行风险识别,将园区内企业分为3个风险级别,结果表明,在该化工园区内的19家企业中,一级风险源有2个,二级风险源有1个,三级风险源有4个。对于风险级别较高的企业,除了日常的风险管理工作,还应该从环境受体调查、公众参与、完善应急预案编制等方面加大风险管理的力度,更好地实现将重大环境污染事件遏制在孕育期,有效预防环境风险事件、减轻环境危害。     

Identification of differentially expressed genes response to TCDD in rat brain after long-term low-dose exposure

Several cohort studies have reported that dioxin and dioxin-like polychlorinated biphenyls might impair the nervous system and lead to neurological or neurodegenerative diseases in the elder people, but there is limited research on the involved mechanism. By using microarray analysis, we figured out the differentially expressed genes between brain samples from SD rats after low-dose(0.1 μg/(kg?bw)) dioxin exposure for six months and controls. To investigate the function changes in the course of dioxin exposure, Gene Ontology(GO) annotation and Kyoto Encyclopedia of Genes and Genomes(KEGG) pathway analysis were performed on the differentially expressed genes. And the changes of several picked genes have been verified by real-time PCR. A total of 145 up-regulated and 64 down-regulated genes were identified. The metabolic processes, interleukin-1 secretion and production were significantly associated with the differentially expressed genes. And the genes regulated by dioxin also clustered to cholinergic synapse and long-term potentiation. Candidate biomarker genes such as egr1, gad2, gabrb3, abca1, ccr5 and pycard may be toxicological targets for dioxin. Furthermore, synaptic plasticity and neuro-immune system may be two principal affected areas by dioxin.     

Emerging contaminants migration from pipes used in drinking water distribution systems: a review of the scientific literature

Environmental Science and Pollution Research - Migration of emerging contaminants (ECs) from pipes into water is a global concern due to potential human health effects. Nevertheless, a review of...     

碳中和视域下的垃圾精细化治理：日本吸收性卫生用品回收体系的构建经验及启示

通过循环利用，减少吸收性卫生用品产量和废弃量的陡增所带来的碳排放量，将加速碳中和进程。日本提供了吸收性卫生用品回收体系构建的先行经验，即以“政府引导—企业运作—社会团体协作”为顶层架构，明确制度、完备设施、完善渠道、宣传到户等。建议我国取长补短，在夯实法律法规和优化主体协同机制的基础上，重点着眼于突破技术壁垒、推动智慧化监管、深化绿色理念，以点带面推进吸收性卫生用品的回收循环试点，进一步推动垃圾分类精细化治理的进程。