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磷添加剂对Bacillus spp.修复铀尾矿过程中细菌群落演替的驱动作用
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作者 唐垂云 钟娟 +3 位作者 吕莹 姚俊 李沐江 刘兴宇 《Journal of Central South University》 SCIE EI CAS CSCD 2024年第4期1233-1247,共15页
铀尾矿库中堆积的铀尾矿会产生环境污染问题。生物矿化可以有效降低铀尾矿中铀的浸出,降低铀尾矿的环境风险。然而,目前尚不清楚磷添加剂如何影响生物矿化过程中铀尾矿的微生物群落结构。在本研究中,评估了羟基磷灰石(HS)和β-甘油磷酸... 铀尾矿库中堆积的铀尾矿会产生环境污染问题。生物矿化可以有效降低铀尾矿中铀的浸出,降低铀尾矿的环境风险。然而,目前尚不清楚磷添加剂如何影响生物矿化过程中铀尾矿的微生物群落结构。在本研究中,评估了羟基磷灰石(HS)和β-甘油磷酸五水合物(GP)作为添加剂对Bacillus spp.修复铀尾矿过程中的微生物群落演替的影响。结果表明,磷添加剂有效地改变铀尾矿浸出液的pH值和铀浸出浓度,显著提高了微生物多样性,促进了微生物群落中门类微生物从actinobacteria向firmicutes和proteobacteria的演替。两种添加剂对细菌群落演替模式的影响不同,其中GP的促进作用较大。GP促进了微生物群落结构中核心物种尤其是Firmicutes的生长,在GP处理中,Bacillus,Pseudomonas,Desulfotomaculum,和Clostridium_sensu_stricto_12的丰度较高,表明这些属类微生物在微生物群落中发挥了重要作用。研究结果为磷添加剂参与生物修复和细菌群落演替提供了证据,从而为铀尾矿的生物矿化技术提供理论支撑。 展开更多
关键词 生物矿化 羟基磷灰石 微生物群落 β-甘油磷酸五水合物
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压裂液粘度对低渗透储层伤害的研究 被引量:2
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作者 尹晓宏 宋平 +1 位作者 李小玲 吕小明 《广东化工》 CAS 2011年第12期31-34,共4页
压裂液对储集层的伤害通常是利用岩心伤害来确定的。文章通过核磁共振的方法,采用真实砂岩并以甘油水合物溶液模拟不同粘度的压裂液,分析研究压裂液粘度对束缚水增加伤害程度和两相流伤害程度的影响。为降低压裂液对特低渗透储层压裂改... 压裂液对储集层的伤害通常是利用岩心伤害来确定的。文章通过核磁共振的方法,采用真实砂岩并以甘油水合物溶液模拟不同粘度的压裂液,分析研究压裂液粘度对束缚水增加伤害程度和两相流伤害程度的影响。为降低压裂液对特低渗透储层压裂改造过程中的储层伤害提供了一定的技术支持。 展开更多
关键词 核磁共振 压裂液粘度 甘油水合物 特低渗透 储层伤害
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Polymers with complicated architectures constructed from the versatile, functional monomer 1-ethoxyethyl glycidyl ether
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作者 Jiaxing Zhang Guowei Wang 《Science China Chemistry》 SCIE EI CAS CSCD 2015年第11期1674-1694,共21页
Because glycidyl(Gly) contains an epoxy and an active hydroxyl group, the Gly unit is difficult to introduce into certain polymeric chains in a controlled manner and usually yields hyperbranched polyglycidyl. Alternat... Because glycidyl(Gly) contains an epoxy and an active hydroxyl group, the Gly unit is difficult to introduce into certain polymeric chains in a controlled manner and usually yields hyperbranched polyglycidyl. Alternatively, the monomer 1-ethoxyethyl glycidyl ether(EEGE), derived from Gly and ethyl vinyl ether, has shown potential for application in polymer chemistry, and homopolymerization of this monomer directly produces linear poly(1-ethoxyethyl glycidyl ether) and further yields linear polyglycidyl. In this review, the initiation system of the EEGE monomer is first discussed in terms of chain transfer to monomers in ring-opening polymerization of epoxides with substituent groups. Then, random copolymerization of EEGE with other epoxides is considered. In addition, because the EEGE units on polymers can be transferred to Gly units and further used to construct copolymers with complicated architectures, the applications of EEGE monomers to block, graft, and hyperbranched copolymers are reviewed. Finally, the synthesis of main chain and terminal functional polyethers by transforming the hydroxyl groups at the polymer end or on the main chain into certain functional groups are also discussed. Chemistry based on EEGE has been proved to be an efficient, versatile route to constructing copolymers containing Gly units and ultimately yielding the target properties and applications. 展开更多
关键词 linear polyglycidyl (LPG) poly(1-ethoxyethyl glycidyl ether) (PEEGE) block polymer graft polymer hyper-branched polymer
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