Estimation of the Total Inorganic Phosphate-Phosphorus in Sediments of the Old Phosphate Port at Jordan’s Gulf of Aqaba

IF 0.4 Q4 CHEMISTRY, MULTIDISCIPLINARY Jordan Journal of Chemistry Pub Date : 2022-09-01 DOI:10.47014/17.2.5
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Abstract

Between 1970–2013, huge amounts of phosphate particles were lost to the sea floor during the transport of phosphate to the port and loading it on ships sailing from the Gulf of Aqaba around the world. The dissolution of the lost phosphate was a major concern. Due to the importance of this issue, the amount of the total inorganic phosphate-phosphorus (TIP) was estimated in the sediment cores from different transects around the Old Phosphate Port (OPP). Additionally, some physical and chemical properties of seawater at OPP were measured. Samples for TIP were collected by SCUBA from 27 sites using metal pipes inserted into a certain depth (est.1.5–2 m) of the bottom. In the lab, sediments of the cores were cut into layers as thin as 25 cm to measure TIP in each layer. The phosphate concentration in each layer revealed the highest amount in layers at 75–100 cm, with an obvious gradual increase from layers at 0–25cm and from layers at 75–100 cm (91.4 and 3.0 million kg, respectively). In contrary, TIP tends to decrease from layers at 75–100 cm until layers at 150–175 cm. Obviously, phosphate concentrations decreased significantly in the layers at 150–175 cm. Based on the above estimations and taking into account the various calculations, the total mass of phosphate was around 11.5 × 106 kg. The final recommendation to the decision maker in Aqaba is / that there is no need to remove the existing phosphate.
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约旦亚喀巴湾老磷酸盐港沉积物中总无机磷酸盐-磷的估算
在1970年至2013年期间,在将磷酸盐运往港口并装载到从亚喀巴湾驶往世界各地的船只上的过程中,大量的磷酸盐颗粒流失到海底。流失的磷酸盐的溶解是一个主要问题。鉴于这一问题的重要性,对老磷化港(OPP)周围不同样带沉积物岩心中总无机磷(TIP)的含量进行了估算。此外,还测量了OPP下海水的一些物理和化学性质。TIP样本由水肺从27个地点采集,使用金属管插入一定深度(约1.5 - 2米)的底部。在实验室里,岩心的沉积物被切割成厚度为25厘米的层,以测量每层中的TIP。各层磷浓度在75 ~ 100 cm处最高,从0 ~ 25cm和75 ~ 100 cm处逐渐增加,分别为9140万和300万kg。相反,TIP在75 ~ 100 cm土层至150 ~ 175 cm土层呈下降趋势。在150 ~ 175 cm处,磷素浓度明显下降。根据上述估计,并考虑到各种计算,磷酸盐的总质量约为11.5 × 106 kg。对亚喀巴决策者的最后建议是,没有必要去除现有的磷酸盐。
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Jordan Journal of Chemistry
Jordan Journal of Chemistry CHEMISTRY, MULTIDISCIPLINARY-
CiteScore
0.50
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发文量
7
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