本文選題：電沉積 + 碳酸鈣結(jié)晶　； 參考：《海洋科學(xué)》2017年07期

【摘要】：電沉積促進(jìn)珊瑚生長和岸礁修復(fù)技術(shù)是國際上常采用的生態(tài)修復(fù)方法,但電沉積技術(shù)中電流條件與沉積晶體之間的關(guān)系卻鮮有研究,關(guān)于其形成的電沉積物的晶體結(jié)構(gòu)的報道更是少有。本文探索了在不同電流密度的條件下海水形成碳酸鈣晶體的特點,并與珊瑚骨骼晶體進(jìn)行了對比。本實驗設(shè)置了300、600、900和1200 m A/m2四組電流密度,在海水中進(jìn)行5 d電沉積反應(yīng),實驗后稱量了陰極上形成的電沉積物質(zhì)量,用掃描電子顯微鏡和X-射線衍射分析了電沉積物中晶體特點并與珊瑚骨骼進(jìn)行了比較。結(jié)果發(fā)現(xiàn),隨著電流密度增大,電沉積物質(zhì)量增加,電流密度為600 m A/m2條件下電沉積物形成的速率與南海的濱珊瑚的生長速率相當(dāng)。在各個電流密度梯度條件下形成的晶體均與珊瑚骨骼的晶體結(jié)構(gòu)相似。較低電流密度下電沉積物中碳酸鈣比例較高。其中,在電流密度為600 m A/m2的條件下,形成的沉積物碳酸鈣文石比例最高,和珊瑚骨骼晶體最為接近。本研究為促珊瑚生長的電沉積技術(shù)提供了基礎(chǔ)數(shù)據(jù)和理論。
[Abstract]:The techniques of promoting coral growth and shore reef restoration by electrodeposition are commonly used in the world. However, the relationship between current conditions and sedimentary crystals in electrodeposition is seldom studied. There have been few reports of the crystal structure of the resulting electrodeposits. In this paper, the characteristics of calcium carbonate crystals formed in seawater at different current densities are investigated and compared with coral skeletal crystals. Four groups of current densities of 300600900 and 1200 m A/m2 were set up in this experiment. The electrodeposition reaction was carried out in seawater for 5 days. After the experiment, the mass of electrodeposition formed on the cathode was measured. The crystal characteristics in electrosediment were analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD) and compared with coral bones. The results show that with the increase of the current density, the mass of the electric sediment increases, and the rate of the formation of the electric sediment at the current density of 600m A/m2 is similar to the growth rate of the littoral coral in the South China Sea. The crystals formed at various current density gradients are similar to those of coral bones. The proportion of calcium carbonate in electrodeposition is higher at lower current density. At the current density of 600m A/m2, the ratio of calcium carbonate stone formed in the sediment is the highest, which is the closest to the coral skeleton crystal. This study provides the basic data and theory for the electrodeposition technology to promote coral growth.
【作者單位】： 中國科學(xué)院南海海洋研究所中國科學(xué)院熱帶海洋生物資源與生態(tài)重點實驗室;中國科學(xué)院南海海洋研究所廣東省應(yīng)用海洋生物學(xué)重點實驗室;中國科學(xué)院海南熱帶海洋生物實驗站;中國科學(xué)院大學(xué);
【基金】：國家自然科學(xué)基金(No.3137099,41106107和2014BAC01B03)~~
【分類號】：P746
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本文編號：1795716