用多项生物标志物评价家用洗涤剂对小鼠的早期影响

 将小鼠暴露于不同浓度的家用洗涤剂后,对肝ATP酶、谷胱甘肽转硫酶(GST)、总氧自由基清除能力(TOSC)和脑乙酰胆碱酯酶(AChE)进行测定.结果显示,4周龄的小鼠暴露于家用洗涤剂时,在4～12d时间里即可使AChE、GST、TOSC等生物标志物受到影响,但ATP酶活力改变不明显,这些生物标志物的改变证明了家用洗涤剂对小鼠的早期影响.     

泥炭生物滤塔处理低浓度H2S气体的试验研究

研究了泥炭生物滤塔处理含低浓度H2 S恶臭气体的技术 .实验考察并研究了气体停留时间和H2 S进气负荷对H2 S去除率的影响 ,生物滤塔的抗冲击负荷能力以及生物降解宏观动力学 .结果表明 ,当停留时间为 2 5— 30s时 ,进气浓度为 3— 70mg m3 ,去除率达到 99%以上 ,且具有较强的抗冲击负荷 .     

安徽省农村黑臭水体成因及治理研究

农村黑臭水体是目前我国水环境污染的主要原因之一。为改善农村生态环境质量和推进水污染治理任务,需加快落实农村黑臭水体的治理工作。本研究针对安徽省农村黑臭水体现状和成因,从多个角度提出可靠的农村黑臭水体治理措施:统筹规划,分阶段推进农村黑臭水体治理工作;抓好结合,做好与当前各项重点工作及规划的衔接;建立"污染物治理链条"思维,狠抓行业各环节规范化管理;建立"类面源"概念,重点推进各类废弃物资源化利用;打通科技与应用之间的壁垒,制定推广农村黑臭水体治理技术模式。     

Effects of adding bulking agents on the biodrying of kitchen waste and the odor emissions produced

The effects of adding a bulking agent on the performance and odor emissions(ammonia and eight sulfur-containing odorous compounds) when biodrying kitchen waste were investigated. Three treatments were considered: the addition of either cornstalks(CS) or wood peat(WP) to kitchen waste as a bulking agent before biodrying, and a control treatment(CK). The water-removal rates for CK, CS, and WP treatments were 0.35, 0.56, and0.43 kg/kg, respectively. Addition of bulking agents to kitchen waste produced less leachate,higher moisture-removal rates, and lower consumption of volatile solids. The CS treatment had the highest biodrying index(4.07), and those for the WP and CK treatments were 3.67 and 1.97, respectively. Adding cornstalks or wood peat decreased NH3 emissions by 55.8%and 71.7%, respectively. Total sulfur losses were 3.6%–21.6% after 21 days biodrying, and H2 S and Me2 SS were the main( 95%) sulfur compounds released. The smallest amounts of sulfur-containing odorous compounds were emitted when cornstalks were added, and adding cornstalks and wood peat decreased total sulfur losses by 50.6%–64.8%.     

（School of Life Science, Sun Yat-sen University, Guangzhou 510275, China）

Introduction B isphenol A (BPA ), 2,2-bis(4-hydroxyphenyl) propane (CA S 80-05-07), is a representative m aterial am ong endocrine disrupting chem icals (ED Cs) and has been extensively used as a raw m aterial of epoxy and polycarbonate resins, and also a…     

铜陵市空气污染物浓度与大气混合层高度的关系

以长三角地区典型工业城市为研究对象,利用气象探空站观测数据,采用干绝热曲线法计算代表大气垂直方向上大气混合能力的最大混合层高度,并与地面观测的空气污染物浓度观测结果进行对比分析。分析结果表明,2-4月和7-10月是月均最大混合层高度较高的2个时期;在季节变化上呈现出春季到冬季依次下降的特征,东亚季风气候是造成这些特征的主要原因之一。总体而言,随着最大混合层高度的增大,各污染物的最大可能浓度呈现出不同的降低趋势。最大混合层高度对颗粒态污染物(PM_(10),PM_(2.5))日均浓度的影响最为显著,主要原因是颗粒态污染物相对稳定、且生命周期长。对于气态污染物而言,化学性质稳定的CO的最大日均浓度与最大混合层厚度之间关系最好,其次为SO_2和NO_2。O_3由于化学性质不稳定且受太阳辐射影响显著,其最大日均浓度与最大混合层高度之间关系相对较差,但也存在着-0.692的负相关。