论文部分内容阅读
黄河上游内蒙古西部沙漠的颗粒物作为磷“源”向黄河输送了大量的磷,乌兰布和沙漠每年向黄河输运约1.1万吨总磷,其中生物可利用磷约为492t。库布齐沙漠每年向黄河输送约为9200t总磷,其中生物可利用磷约为688t。黄河沉积物向海水中释放磷,黄河是海洋中磷元素的内源。研究了黄河沉积物对磷的吸附解吸的动力学和等温线,实验所得的等温线符合Langmuir方程,在自然粒度下黄河下游三个站位沉积物的EPC0值在0.005～0.08mg/L之间。
Particles in the desert of the upper reaches of the Yellow River in the western Inner Mongolia, as a source of phosphorus, send large quantities of phosphorus to the Yellow River. The Ulanbuh desert and the desert transport about 11,000 tons of total phosphorus to the Yellow River each year, of which bioavailable phosphorus is about 492 tons. The Kubuqi Desert annually delivers about 9,200 tons of total phosphorus to the Yellow River, of which bioavailable phosphorus is about 688 tons. Yellow River sediments release phosphorus into seawater, and the Yellow River is the endogenous source of phosphorus in the ocean. The kinetics and isotherms of adsorption and desorption of phosphorus by sediments from the Yellow River were studied. The isotherms obtained by the experiments were in accordance with the Langmuir equation. Under normal grain size, the EPC0 values of sediments at the three stations of the lower Yellow River were between 0.005 and 0.08 mg / L .