钛胶海水提铀动力学研究Ⅲ——交换过程的扩散机理     

陈松  许爱玉  黄宣宝  许建中  田春兰 《海洋学报》1982,4(2):175-182

水合氧化钛是一种无机离子交换剂.它对海水中铀的吸附是一种较为复杂的离子交换过程.除了一般的离子交换外,可能还伴随有络合[螯合][1]过程.在一般的情况下,离子交换的决定步骤是离子扩散.根据体系的性质不同,可以是离子在交换剂粒子内部的扩散(粒子扩散),或是在围绕粒子周围的液膜内部的扩散(液膜扩散).  相似文献   

厦门西港表层沉积物的化学特征   总被引：11，自引：3，他引：11  

陈松  廖文卓 《台湾海峡》1992,11(2):131-137

本文根据1990年厦门西港重要站点的表层沉积物中的重金属(Fe、Mn、Cu、Pb、Zn、Cd、Hg)、有机污染物(总有机碳、石油、DDT、666)和磷(无机磷、有机磷和总磷)等测定资料,讨论了它们的地球化学性质及环境影响。结果表明,沉积物中Pb和Zn含量明显偏高,Pb、cu含量与1983年相比已有一定积累,也产生了有机污染现象。  相似文献   

盐度对厦门筼筜湖疏浚物-海水界面上镉交换作用的影响     

廖文卓  陈松 《台湾海峡》1992,(4)

本文报道了厦门筼筜湖疏浚物在不同盐度的天然海水中镉的溶出和被吸附的模拟研究结果。在相同条件下释放量(释放率)随介质盐度升高而增大,而被吸附能力降低。讨论了盐度的影响及溶出与再吸附所遵循的动力学规律。  相似文献   

铅从污染疏浚物的释放作用     

陈松  林汝健 《热带海洋》1992,11(4):1-5

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THE BEHAVIOR AND SEDIMENTATION MECHANISM OF Pb, Cu AND Cd IN SEDWAENTARY PHASE OF THE CHANGJIANG ESTUARY     

陈松  廖文卓  潘皆再 《海洋学报(英文版)》1984,3(2):212-220

The authors have determined the distributions of Ph, Cu and Cd ia surface sediment, acid-soluble fraction and interstitial water of the Changjiang Estuary and analysed the relationship between them and some environmental parameters, finding that there exists a quasi-equilibrium between the interstitial water and the sediment. The distribution of Pb or Cu in both phases it controlled mainly by the adsorptioa-desorption and deposition-solution processes of HFO" and org." in the sediments, whereas Cd is mainly controlled by the depoahisn-Jolution process of CdS. The sedimentation mechanism of Ph, Cu and Cd in the Changjlang Estuary is preliminarily proposed.  相似文献   

GEOCHEMISTRY OF ABYSSAL SEDIMENT IN THE PACIFIC OCEAN     

陈松  许爱玉  骆炳坤 《海洋学报(英文版)》1987,6(3):389-396

The contents of Fe, Mn, Cu, Co, Ni, Pb and Zn in the seaiment associated with manganese nodules from the Northern Central Pacific Ocean and in their acid-soluble fractions were determined and correlations among the elements and between the trace metals and environmental parameters were discussed. It has been found that the contents of Mn, Cu and Ni in the sediment are one order of magnitude higher than those in the common sediment. As shown in the manganese nodules, they may mainly derive from seabed. The contents of all trace metals in the sediment are obviously governed by Fe-and Mn-oxides, organic matter, seawater depth, particle size and Eh. Multi-element correlation equations were developed for all trace metals. The trace metals in acid-soluble fraction of the sediment were also much higher than ihose of common sediment and negatively correlated with water depth, implying the possible influence of carbonate speciation.  相似文献   

GEOCHEMISTRY OF MANGANESE NODULES IN THE NORTHERN CENTRAL PACIFIC   总被引：2，自引：0，他引：2  

陈松  许爱玉 《海洋学报(英文版)》1986,5(4):543-551

The contents of Mn, Fe, Cu, Co, Ni, Pb and Zn in manganese nodules and associated pelagic sediment from the Northern Central Pacific have been measured, and the correlations between the elements of the nodules and between the chemical composition and the sedimentary environments have been analyzed. It has been found that Cu, Ni and Zn are preferentially enriched in the Mn-oxide phases while Co and Pb in the Fe-oxide phases of the nodules. The elements within the same phase are positively correlated and the elements within different phases are negatively correlated. It is concluded that the elements in the Fe-oxide phase may have directly deposited from seawater while Mn-oxide phase elements are mainly derived from interstitial waters.  相似文献   

A KINETIC STUDY OF THE EXTRACTION OF URANIUM FROM SEA WATER BY HYDROUS TITANIUM OXIDE-MEASUREMENT OF THE ACTIVATION ENERGY OF ADSORPTION     

陈松  廖文卓  许溪滨 《海洋学报(英文版)》1982,1(2):210-213

The measurement of the activation energy is an important part of the kinetic study ofuranium-uptaking on Hydrous Titanium Oxide (HTO) from sea water. But the kineticproblem of this process still remains in the exploratory stage, and its measurement ofadsorption activation energy is difficult due to the complexity of sea water system and itslow level of uranium concentration (3 μg U/l). In this paper we propose a methodof measurement of adsorption activation energy which is a simple approximation andcan be directly applicable to natural sea water, according to Langmuir's theory with somesimplified treatment.  相似文献   

德州市地面沉降成因及防治对策浅析     

王小刚  陈松  王秀芹  季春来 《地质灾害与环境保护》2006,17(3):62-66

通过对德州市地面沉降现状及成因综合分析,得出德州市地面沉降的主要原因是长期超采深层地下水,造成承压水位降低,含水层本身及其上、下相对隔水层中孔隙水压力减小,地层压缩导致地面发生沉降;构造因素、工程地质因素是地面沉降的次要原因。德州市已经制定规划,控制深层地下水的开采,还应利用封停的深水井进行深层地下水人工回灌工作,才能控制地面沉降的进一步发展。  相似文献   

深孔取芯钻探技术的发展     

陈松 《岩土钻凿工程》1996,(6):4-7

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