海水及天然水中痕量汞的冷原子吸收直接测定

自从水俣病发生以来,人们对环境中汞的含量愈益重视。据报道海水中汞的浓度为0.5—364ngl~(-1),其含量虽如此之微,但为了准确测定不同海域海水中汞含量的自然背景值及评价不同海区水域是否受到汞污染,则要求测定方法具有很高的灵敏度和低的检出限。为了使方法的灵敏度能适应于测定海水中的汞含量,曾采用过预浓缩后进行冷原子吸收测定的方法。近年来,为提高汞的冷原子吸收测定方法的灵敏度     

RESEARCH ON THE DETERMINATION OF Pb, Cd, Cu AND Zn IN SEAWATER BY STRIPPING VOLTAMMETRY

In this paper, a comparison viral made between the two results of determining Pb, Cd, Cu and Zn in seawater by direct current (tripping voltammetry (DCS) with rotating glass carbon electrode and by differential pulse stripping voltammetry (DPS) with hanging mercury drop electrode (HMDE). By DCS, the range of linear calibration curves obtained was 4×10-3 M-2×10-7M for Cu, Zn and Cd, and 4× 10-9M-2×10-3M for Pb. By using DPS, the range of linear calibration curve was as follows: Cu 0.65-1.9 ppb; Pb 1.0-10 ppb; Zn 0.65-2.0 ppb; Cd 0.02-0.14 ppb. It was found that DCS could be used for determining Pb, Cu, Zn in coastal waters, but it is necessary to add gallium ion to it to eliminate the interference of Cu-Zn inter-metallic compound for determining Zn. The DPS is better for determinig Cd.     

太阳能生物循环控制养虾法

本文介绍一种不仅适合于沿海,而且也适合于内陆地区养殖技术——“太阳能生物循环控制养殖海虾法”。该技术在沿海地区利用海水,内陆地区可利用地下咸水。对虾养殖在“密闭循环体系”或“开放循环体系”中,利用太阳能加温,低温地区也能全年养殖。该技术不仅可解决全年高产稳产的养殖问题,而且避免了天然虾池的换水问题及虾池排放水的环境污染问题。该技术在美国、欧洲、日本等地以至于沙特阿拉伯等沙漠地带获得成功,取得较高利润,并已达到     

因子分析法在厦门港海域沉积物污染研究中的应用

本文测定了厦门港海域表层沉积物36个站位样品中10种污染物的含量,并用Q型因子分析法用电子计算机编制程序对36个样品10个变量进行聚类分析,结果表明36个站位表层沉积物大体可分成两类,一类以有机质、硫化物、铅、铜、汞含量较多为其特征,此类沉积物大多粒度较细,处于较封闭环境,另一类以DDT、666含量较多,有机质、硫化物等含量较少为特征,此类沉积物大多处于较开阔环境且粒度较粗,计算结果较好地解释了各站位的污染情况.