發(fā)布時(shí)間：2018-02-03 05:51

  本文關(guān)鍵詞： 磷礦廢石 淋溶實(shí)驗(yàn) 磷素釋放 液固比 pH　出處：《遼寧工程技術(shù)大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：自三峽庫(kù)區(qū)開(kāi)始蓄水以來(lái),庫(kù)區(qū)內(nèi)的香溪河水體呈現(xiàn)出富營(yíng)養(yǎng)化狀態(tài)并且不斷伴隨著水華現(xiàn)象的發(fā)生。香溪河的水體環(huán)境發(fā)生了很大變化,但是水域內(nèi)的磷礦廢棄巖石依然采用粗放露天式堆積。本文主要研究了樹(shù)空坪磷礦廢石在不同的影響因素下磷素淋溶規(guī)律性變化。根據(jù)磷礦廢石堆塹體所在地域的氣候環(huán)境和磷礦廢石本身的特點(diǎn),通過(guò)靜態(tài)淋溶實(shí)驗(yàn)、持續(xù)淋溶實(shí)驗(yàn),研究了在不同液固比、不同濾出液取樣時(shí)間和不同酸堿環(huán)境條件下,磷礦廢石磷素呈現(xiàn)出的規(guī)律性變化。結(jié)果表明：(1)在不同液固比靜態(tài)淋溶條件下,總磷的浸出濃度受溶解度控制；磷素的累加釋放量隨著液固比的增加而增加。(2)動(dòng)態(tài)淋溶實(shí)驗(yàn)表明,磷素的釋放過(guò)程分三個(gè)階段：第一階段是廢石顆粒與浸提液接觸后,固相和液相之間的反應(yīng)過(guò)程；第二階段是廢石顆粒與浸提液繼續(xù)保持接觸,磷礦廢石顆粒逐漸形成了微孔狀的硅酸鹽質(zhì)骨架；第三階段是固相和液相之間的反應(yīng)平衡。(3)在不同酸堿靜態(tài)淋溶條件下,浸提液中H+離子有助于磷礦廢石磷素的釋放,而OH-離子對(duì)磷礦廢石磷素釋放的影響很小。
[Abstract]:Since the three Gorges Reservoir began to store water, the Xiangxi River in the reservoir area presents eutrophication state and accompanied by Shui Hua phenomenon. The water environment of the Xiangxi River has changed a lot. However, the waste rock of phosphate rock in the water still adopts extensive open-air accumulation. This paper mainly studies the regularity of phosphorus leaching under different influence factors. According to the area where the cut body of waste rock heap of phosphate rock is located, this paper mainly studies the change of phosphorus leaching regularity under different influence factors. The climatic environment and characteristics of phosphate rock waste itself. Through static leaching experiment and continuous leaching experiment, the conditions of different liquid-solid ratio, different sampling time of filtrate and different acid-base environment were studied. The results showed that the leaching concentration of total phosphorus was controlled by solubility under different liquid-solid ratio static leaching conditions. The dynamic leaching experiment showed that the phosphorus release process was divided into three stages: the first stage was the contact between the waste stone particles and the extraction solution. The reaction process between solid and liquid phase; The second stage is that the waste rock particles keep in contact with the extraction solution, and the phosphate rock waste rock particles gradually form a microporous silicate skeleton. The third stage is the reaction equilibrium between solid phase and liquid phase. However, the effect of OH- ion on phosphorus release from waste rock of phosphate rock is very small.
【學(xué)位授予單位】：遼寧工程技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：X524;X754

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相關(guān)碩士學(xué)位論文 前1條

1 鄭澤;磷礦廢石磷素淋溶規(guī)律的實(shí)驗(yàn)研究[D];遼寧工程技術(shù)大學(xué);2015年

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本文編號(hào)：1486605