A facile hydrothermal method–fabricated robust and ultralight weight cellulose nanocrystal-based hydro/aerogels for metal ion removal

Environmental Science and Pollution Research - Heavy metal ion contamination, in particular that associated with Pb2+, Cd2+, and Cu2+, poses a considerable threat to aquatic environments and human...     

Seedlings Recruitment of a Timberline Tree (Larix chinensis Beissn) in Taibai Mountain,China

Russian Journal of Ecology - Larix chinensis Beissn forms a subalpine timberline on Taibai mountain, Shaanxi, China. Seed emergence and survival of seedlings were studied by seed sowing experiments...     

皂素生产废水的资源化综合利用实验

皂素生产废水是强酸性高浓度有机废水,富含淀粉水解后的糖类.据此特点,以皂素生产中的一次废水为原料,经中和处理后进行酒精发酵,使废水资源化.结果表明,采用工业氨水为中和剂,中和用量为5.20%(体积分数),发酵接种量为10%(体积分数),总发酵时间为60 h时,4 L废水可生产出95%的工业酒精120 mL.一次废水COD去除率达75%,后续废水量大大减少,具有明显的环境效益.经估算每生产lt工业酒精可处理4lt一次废水,与生产成本相比,具有明显的经济效益.     

Red mud-modified biochar reduces soil arsenic availability and changes bacterial composition

Environmental Chemistry Letters - Worldwide arsenic (As) contamination in soils induces pollution of surface and ground waters, reduces crop quality and yield, and threatens human health....     

纳米二氧化钛对小胶质细胞Notch信号通路及炎症因子分泌水平的影响

由于纳米材料的广泛应用及其可能存在的生物安全性风险,本研究探讨了纳米二氧化钛对小胶质细胞Notch信号通路及炎症因子分泌水平的影响.以不同浓度的纳米二氧化钛染毒小胶质细胞,MTT法测定细胞活力,乳酸脱氢酶(LDH)检测试剂盒测定细胞培养液上清液LDH活性,ELISA法测定细胞培养液上清液肿瘤坏死因子-α(TNF-α)、...     

Management of the belgian coast: Opinions and solutions

Since the beginning of the 20th century the Belgian coast has undergone important changes of which an overview is presented here. To determine the view of the Belgian public on the Belgian coast and in order to obtain their opinions and solutions to the problems along the Belgian coast, a questionnaire survey was conducted with a total of 100 respondents divided into five groups, all active in the coastal zone. The five groups included (1) politicians on various levels of authority, (2) coastal entrepreneurs and business people, (3) naturalists and scientists, (4) coastal residents and (5) tourists. Coastal zone problems, as perceived by the different groups, and their solutions are discussed. Former municipalities, in particular, were held responsible for the current coastal problems. Most respondents were skeptic about the application of recent juridical instruments (e.g. the Dune Decree), the structural plans and their power to protect the remaining natural areas. The root of the problems seems to lie in lack of coordination and communication between different authorities responsible for the coastal zone.     

Effect of silver nanoparticles in crop plants Phaseolus radiatus and Sorghum bicolor: media effect on phytotoxicity

Understanding some adverse effects of nanoparticles in edible crop plants is a matter of importance because nanoparticles are often released into soil environments. We investigated the phytotoxicity of silver nanoparticles (AgNPs) on the important crop plants, Phaseolus radiatus and Sorghum bicolor. The silver nanoparticles were selected for this study because of their OECD designation as a priority nanomaterial. The toxicity and bioavailability of AgNPs in the crop plant species P. radiatus and S. bicolor were evaluated in both agar and soil media. The seedling growth of test species was adversely affected by exposure to AgNPs. We found evidence of nanoparticle uptake by plants using electron microscopic studies. In the agar tests, P. radiatus and S. bicolor showed a concentration dependent-growth inhibition effect. Measurements of the growth rate of P. radiatus were not affected in the soil studies by impediment within the concentrations tested herein. Bioavailability of nanoparticles was reduced in the soil, and the dissolved silver ion effect also differed in the soil as compared to the agar. The properties of nanoparticles have been shown to change in soil, so this phenomenon has been attributed to the reduced toxicity of AgNPs to plants in soil medium. The application of nanoparticles in soil is a matter of great importance to elucidate the terrestrial toxicity of nanoparticles.     

加强安全生产管理的七字诀

当前创建和谐社会正成为中国改革开放伟大事业的重要目标,安全毫无疑问是创建和谐社会的根本条件,这更要求从事安全管理工作的同行们视保一方平安为己任,切实提高安全管理水平.     

CuMnOx/γ-Al2O3及稀土助剂对VOCs催化燃烧性能的影响

利用浸渍法制备了Cu-Mn复合氧化物催化剂和加入不同稀土含量的Cu-Mn复合氧化物催化剂,通过实验优选出加入稀土催化剂中稀土含量的最优配比,以气相色谱为检测手段,考察了加入稀土和不加稀土催化剂的催化燃烧性能,结果表明,加入稀土的催化剂T₉₉（催化处理效率达到99%时的温度）比不加稀土的催化剂降低30～40℃,具有更好的低温活性,且对多种VOCs均能降低反应温度。