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Acta Oceanologica Sinica 2005年第4期24卷 72-80页

作者： long aimin CHEN Shaoyong YAN Wen TIAN Zhenlong South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China

The contents of total copper, total dissolved copper, particulate copper, and free ion copper in the Zhujiang River Estuary were investigated in July 2002 and January 2003 respectively, and the spatial distribution trend of these species of copper were compared in two cruises. It was found that, in summer, the total copper content in the Zhujiang River Estuary increased with salinity, while the content office ion copper decreased with salinity. However, in winter, the contents of total copper and free ion copper both decreased with salinity. So, it could be concluded that, copper content and speciation in the Zhujiang River Estuary were regulated by other factors than runoffdiffusion such as upwelling current. In order to prove the spatial trend of rice ion copper content in the Zhujiang River Estuary, the cultivation of Dunaliella tertiolecta in waters obtained from sampling stations with different salinities was carried out, and the copper uptake by algae cells was measured then. It was found that, the cells＇ uptake of copper increased with rice ion copper, not the content of total copper.

关键词： speciation copper Zhujiang River Estuary

Marine diatom Thalassirosira weissflogii nutrient drawdown and its physiological status variation challenged to zinc and cadmium exposure

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Acta Oceanologica Sinica 2007年第6期26卷 51-61页

作者： LI Chundi long aimin YAN Wen MA Fujun CHEN Shaoyong Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Key Laboratory of Tropical Marine Environmental Dynamics South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Graduate School Chinese Academy of Sciences Beijing 100039 China

The uptake of zinc and cadmium by a species of marine diatom Thalassirosira weissflogii and the nutrient variation （ phosphorus and silicon） in the culture medium were estimated when exposed to zinc and cadmium stress under controlled laboratory conditions. It was found that low cadmium addition could stimulate the culture to grow with a relatively high rate and exert its toxicity at the elevated concentration. The cellular uptake of zinc and cadmium by the diatom varied in the ranges of 1.21 - 3.75 and 0. 060 - 0. 629 fmol per cell respectively in the whole cultivation period. The mean cellular phosphorus and silicon drawdowns were constant with 0. 26 - 0. 42 and 0. 30 - 0. 46 pmol per cell respectively in those healthy cultures. It is illustrated that the algal cells can adjust some physiological mechanisms to decrease metal accumulation and keep metal homeostasis in the organism. The correlation analysis results further indicate that the cellular cadmium uptake might be closely related with the cellular phosphorus, silicon drawdown and the growth rate of diatom （P 〈0. 05, 0. 001,0. 01 ） ; and the cultures grow better in good conditions, the lower amount of phosphorus, silicon materials are consumed by a single cell to keep a high efficiency of utilization.

关键词： zinc cadmium diatom replacement phosphate silicate

Short-term metal accumulation and MTLP induction in the digestive glands of Perna virdis exposed to Zn and Cd

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Journal of Environmental Sciences 2010年第7期22卷 975-981页

作者： aimin long Chundi Li Shaoyong Chen Wen Yan Aicui Dang Yuanyue Cheng Dongwei Lu LED Laboratory South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

Time-dependent Zn and Cd accumulation and metallothionein like protein （MTLP） induction in the digestive glands of mussels, Perna virdis, were measured under different exposure conditions. The initial uptake rate at start of chase （ρ0） and mean residence time （τ） were calculated to determine the physiological response of organisms and their potential detoxification mechanisms. It was found that in digestive glands, Zn had obviously higher ρ0 and shorter mean residence time than Cd, indicating that these two metals had different accumulation dynamics even though they were very close in the periodic element table. MTLP levels in digestive glands varied from 0.51 to 1.05 μg/g ww （wet weight）. The MTLP level increased continuously when mussels were exposed to low and middle levels of Zn and Cd media, and reached maximal levels at day 4, then decreased when they were exposed to high level Zn and Cd solutions. With regard to the fraction of Zn and Cd accumulated in the digestive glands, the ratios of soluble metal to total metal decreased continuously after exposure in low and middle levels of Zn and Cd media, and decreased continuously in the first 4 days and then to level off when mussels were exposed to media with high concentration of Zn and Cd. Results suggested that both MTLP induction and metal insolubilization were detoxification processes in digestive glands of mussels.

关键词： Zn Cd Perna viridis metallothionein like protein insolubilization

Carbon-to-chlorophyll ratio and carbon content of phytoplankton community at the surface in coastal waters adjacent to the Zhujiang River Estuary during summer

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Acta Oceanologica Sinica 2020年第2期39卷 123-131页

作者： Xiaoyong Yu Jie Xu aimin long Ruihuan Li Zhen Shi Qian P Li State Key Laboratory of Tropical Oceanography South China Sea Institute of OceanographyChinese Academy of SciencesGuangzhou 510301China University of Chinese Academy of Sciences Beijing 100049China

Chlorophyll a(Chl a),particulate organic carbon(POC)and biogenic silica(BSi)were determined in coastal waters adjacent to the Zhujiang(Pearl)River Estuary(ZRE)during summer,in order to examine the C:Chl a ratio of phytoplankton and phytoplankton carbon in the plume-impacted coastal waters during summer,as well as to assess the relative contribution of diatoms to the phytoplankton biomass,by the regression between Chl a,POC and *** results showed that the C:Chl a ratio(g/g)of phytoplankton was high(up to 142),likely due to high light intensity and nutrient *** river plume input stimulated phytoplankton growth,especially diatoms,resulting in higher relative contribution of phytoplankton carbon(55%)and diatoms(34%)to POC in the plume-impacted region than those(33%and 13%)in high salinity area,*** carbon(up to 538μg/L)in the plume-impacted region was much higher than that(<166μg/L)in high salinity *** findings were helpful to improve the biogeochemical model in coastal waters adjacent to the ZRE.

关键词： chlorophyll a particulate organic carbon biogenic silica phytoplankton carbon diatoms

A novel aminated polymeric adsorbent for removing refractory dissolved organic matter from landfill leachate treatment plant

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Journal of Environmental Sciences 2009年第8期21卷 1089-1095页

作者： ZHANG long, LI aimin, WANG Jinnan, LU Yufei, ZHOU Youdong State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China. [a]State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210093 China

Refractory dissolved organic matter （DOM） from landfill leachate treatment plant was with high dissolved organic carbon （DOC） content. An aminated polymeric adsorbent NDA-8 with tertiary amino groups and sufficient mesopore was synthesized, which exhibited high adsorption capacity to the DOM （raw water after coagulation）. Resin NDA-8 performed better in the uptake of the DOM than resin DAX-8 and A100. Electrostatic attraction was considered as the decisive interaction between the adsorbent and adsorbate. Special attention was paid to the correlation between porous structure and adsorption capacity. The mesopore of NDA-8 played a crucial role during uptake of the DOM. In general, resin in chloride form performed a higher removal rate of DOC. According to the colunm adsorption test, total adsorption capacity of NDA-8 was calculated to 52.28 mg DOC/mL wet resin. 0.2 mol/L sodium hydroxide solution could regenerate the adsorbent efficiently.

关键词： electrostatic interactions chemically modified resin coagulation adsorption pore structure

生态位视域下科技社团发展需处理好的三重关系

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科技通报 2013年第8期29卷 229-233页

作者：龙爱民浙江省科学技术协会杭州310003

根据生态位竞争排斥法则,科技社团必须以"社"、"科"、"群"为界线,厘清其与涉"科"政府部门、与其他社团以及与科技人员之间相互关系,消除潜在的重合发展区,从而实现生态位分化,实现差异化发展。

关键词：生态位科技社团博弈竞合发展

基于MAC认证和相关分解的AS级确定包标记算法

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科技通报 2016年第9期32卷 131-134页

作者：龙君君袁爱民绵阳职业技术学院四川绵阳621000

本文基于对数据包标记算法的分析,并针对它存在的一些问题进行了改进,从而构造了一种基于MAC认证和相关分解的AS级确定包标记方案(ANRD-DPM)。首先构建一个AS域自身的追踪机制,使受害主机可以追踪到目标端AS的攻击边界入口,然后在此基... 详细信息

本文基于对数据包标记算法的分析,并针对它存在的一些问题进行了改进,从而构造了一种基于MAC认证和相关分解的AS级确定包标记方案(ANRD-DPM)。首先构建一个AS域自身的追踪机制,使受害主机可以追踪到目标端AS的攻击边界入口,然后在此基础上实施域间的远程追踪,尽可能追踪到靠近攻击源的攻击入口,完成域间的协同追踪和防御。

关键词：确定包标记检测追踪

铜在鲤鱼(Cyprinus carpio)鱼鳃微环境中的形态分布

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环境科学 2000年第4期21卷 6-10页

作者：龙爱民陶澍刘长发北京大学城市与环境学系北京100871

利用 Playle设计的装置测定了不同铜暴露水平下鲤鱼鳃部进出水中的游离铜离子浓度、粘液含量及有关参数 .用MINTEQA2和单配位体模型联合的试算方法计算了不同形态铜含量以及鳃部粘液对铜的络合能力 .结果表明 ,利用该算法可以获得鱼鳃... 详细信息

利用 Playle设计的装置测定了不同铜暴露水平下鲤鱼鳃部进出水中的游离铜离子浓度、粘液含量及有关参数 .用MINTEQA2和单配位体模型联合的试算方法计算了不同形态铜含量以及鳃部粘液对铜的络合能力 .结果表明 ,利用该算法可以获得鱼鳃微环境金属形态分布的准确结果 ,同时可以得到与鱼鳃粘液络合能力有关的参数 .随着暴露铜含量增加 ,粘液分泌量随之增加 ,鱼鳃微环境 p H和碱度也有所上升 .鱼鳃粘液的络合当量浓度 ( Cu/ C)和稳定常数 (对数 )分别为 0 .95mmol/ mg和5.32 .就铜形态分布而言 ,鱼鳃微环境与外部水相的主要差别表现在相对较高的羟基络合态铜含量以及占总量 3%～ 2 0 %的鱼鳃粘液络合态铜 .

关键词：鲤鱼锶微环境铜粘液形态分布水体污染

彩虹方头鱼(Paracheirodon innesi)鱼鳃微环境特性及铜的生物有效性

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环境科学学报 2001年第2期21卷 218-223页

作者：龙爱民陶澍徐福留曹军北京大学城市与环境学系教育部地表过程分析与模拟重点实验室北京100871

建立了测定小个体鱼种鳃部微环境特殊条件的高密度暴露方法 ,利用这种方法测定了彩虹方头鱼 (Paracheirodonin nesi)鱼鳃微环境的 pH、碱度、粘液含量等参数 ,并根据测定结果计算了鱼鳃微环境中铜的形态分布 .结果表明 :高密度暴露可在 ... 详细信息

建立了测定小个体鱼种鳃部微环境特殊条件的高密度暴露方法 ,利用这种方法测定了彩虹方头鱼 (Paracheirodonin nesi)鱼鳃微环境的 pH、碱度、粘液含量等参数 ,并根据测定结果计算了鱼鳃微环境中铜的形态分布 .结果表明 :高密度暴露可在 15s左右建立动态平衡 .鱼鳃与外部水体平衡pH为 7 2 .鱼鳃微环境中 ,碱度在碱性条件下迅速增加 .

关键词：生物有效性重金属毒性彩虹方头鱼鱼鳃微环境特性

金鱼(Carassius auratus)对颗粒态镉的鳃吸收

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环境科学学报 2001年第1期21卷 24-28页

作者：刘长发陶澍龙爱民曹军北京大学城市与环境学系北京100871

采用水相平衡态镉浓度不变 (0 0 1mg/L) ,增加水铝矿颗粒吸附态镉暴露的实验方法 ,研究了金鱼 (Carassiusauratus)对颗粒态镉的鳃吸收 .结果表明 ,鳃中镉含量均随颗粒态镉暴露浓度增加而增加 ,且镉 /铝含量比明显高于水相 ,从而证实了... 详细信息

采用水相平衡态镉浓度不变 (0 0 1mg/L) ,增加水铝矿颗粒吸附态镉暴露的实验方法 ,研究了金鱼 (Carassiusauratus)对颗粒态镉的鳃吸收 .结果表明 ,鳃中镉含量均随颗粒态镉暴露浓度增加而增加 ,且镉 /铝含量比明显高于水相 ,从而证实了颗粒态镉的鱼鳃吸收有效性 .金鱼鳃吸收颗粒态镉的主要过程是 :随水流流经鳃表面的颗粒态镉附着在鳃表粘液上 ,在鳃部微环境下 ,吸附的镉发生解吸而被鳃部细胞吸收 .

关键词：镉金鱼生物有效性悬浮物颗料态鱼鳃吸收