Long-term effects of antibiotics,norfloxacin, and sulfamethoxazole,in a partial life-cycle study with zebrafish (Danio rerio): effects on growth,development, and reproduction

Environmental Science and Pollution Research - A partial life-cycle study with zebrafish (Danio rerio) was conducted to evaluate the long-term effects of antibiotics, norfloxacin (NOR) and...     

咪唑银配位聚合物吸附偶氮染料研究

以咪唑银配位聚合物{Ag（im）}n作吸附剂,对偶氮染料刚果红和甲基橙的吸附进行了研究,结果表明：刚果红的最佳吸附条件是吸附剂加入量为31．5mg,温度为30℃,pH值为3,吸附时间为70min,最高染料脱除率为90。7％;甲基橙的最佳吸附条件是吸附剂加入量为36．7mg,温度为30℃,pH值为2,吸附时间为50min,最高染料脱除率为58．3％。     

大气降尘污染引起城市供水增加的污染率计量模型

分析了城市缺水及影响城市供水的诸多因素,探讨了供水影响因素与城市供水间的关系,提出了大气降尘污染因素引起的城市供水增加的污染率计算模型.在此基础上,利用该模型对西安市降尘污染引起的城市供水增加比例进行了模拟分析.该模型为城市供水预测和环境污染损失计算提供了一种可借鉴的方法,对城市环境保护及城市供水规划具有一定的参考价值.     

陶瓷工业固体废物资源化利用现状

陶瓷制品在生产过程会产生大量固体废物,其中大部分是开裂或变形陶瓷产品、在加工中产生的废料以及陶瓷残次品等。随着陶瓷产量的迅速增长,产生的固体废物日益增加。目前,我国陶瓷工业废物的处理与利用率比较低,致使大量废渣挤占耕地、污染环境,限制了陶瓷工业的发展。陶瓷工业固体废物的处理与利用己成为陶瓷工作者和环境工程技术人员共同关注的问题。主要介绍了陶瓷工业固体废物的来源及分类,目前国内外对于陶瓷工业固体废物资源化利用取得的研究成果。对陶瓷工业固体废物的有效利用,不仅缓和了陶瓷企业面临的环境保护压力,还将有效实现经济社会的可持续发展。     

太湖复合污染胁迫下生物体抗氧化标志物的响应

采用清洁地饲养鲫鱼(Carassius auratus)为监测对象,采取主动生物监测法(ABM)对太湖北部湾复合污染区梅梁湖与贡湖进行为期3周的生物监测.结果表明,在有机、重金属复合污染条件下鲫鱼肌肉组织中抗氧化酶谷胱甘肽(GSH)、谷胱甘肽过氧化物酶(GP_X)与谷胱甘肽硫转移酶(GST)对污染物胁迫反应敏感,实验初期GSH出现显著抑制,而GP_X与GST出现显著诱导(P<0.05),实验后期均出现一定程度恢复,各监测点之间抗氧化酶没有表现出显著的差异.IBR综合分析表明,重金属离子对生物体抗氧化综合生物效应贡献最大,同时,浅水湖泊中风场的扰动影响不可忽略.     

高炉煤气洗涤水脱氰研究

氯碱法处理高炉煤气洗涤水,运用正交实验设计方法设计实验,根据直观分析和方差分析方法整理实验数据,得出最佳反应条件,影响因素顺序,显著因素。     

滑坡的发生与降雨关系的研究

在分析滑坡的地质资料和气象资料的基础上,讨论了降雨诱发滑坡的机制,并深入探讨了滑坡与降雨的关系,包括:滑坡与降雨的分布特点、滑坡与降雨频次之间的关系、滑坡与降雨在时间上的关系等。结果表明:滑坡发生的概率和滑坡数量不仅与降雨量的大小成正相关关系,而且与滑坡发生的当天降雨及前期降雨特征关系密切。     

High mercury leachate containing HgS22 − complex ion: Detoxifying solidification and high efficiency Hg extraction

Clean and efficient treatment of high-mercury leachate produced from remediation of mercury-polluted soil has become a huge challenge for environmental scientists.In this work,cement solidification was firstly adopted to treat the high-concentration mercury leachate,which had high alkalinity.Different mercury concentrations,namely 3.120 mg/L Hg mercury leachate and 9.243 mg/L Hg mercury concentrated leachate,were separately solidified by Portland cement.The results indicated that simply using the cement can properly solidify both the leachates to meet the waste landfill standard,with liquid(mL)/solid(g) ratio(L/S ratio) of4:10–6:10.In order to make full use of mercury in the leachates,a Hg extraction method was subsequently carried out under different experimental parameters,such as temperature and p H value.It was shown that the Hg extraction ratio could reach as high as 99.84% and almost all the mercury in the leachate could be transformed to HgS precipitate;moreover,the Hg concentration in the treated leachate was reduced from 3.120 to 0.005 mg/L at p H 2.98 and 30°C,which was much less than the limit of the national standard,indicating that the leachate had been completely cleaned and could be discharged freely.Hence,simple cement solidification renders high-mercury leachate nontoxic,and the Hg extraction method can successfully recover the Hg and enable the residual leachate to be discharged safely.     

Ectomycorrhizal fungi enhance the tolerance of phytotoxicity and cadmium accumulation in oak (Quercus acutissima Carruth.) seedlings: modulation of growth properties and the antioxidant defense responses

Environmental Science and Pollution Research - Ectomycorrhizal fungi (EMF), which form symbiotic ectomycorrhiza with tree roots, mediate heavy metal tolerance of host plants. To investigate the...