本文選題：鍍鋅廠廢水　切入點：鋅離子　出處：《吉林農(nóng)業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：電鍍廠工業(yè)廢水污染是現(xiàn)代社會發(fā)展進程中急待解決的污染問題,電鍍廠周邊的農(nóng)田、河流、地下水等環(huán)境也遭受到了嚴重的污染,甚至影響了人體的健康。其中鋅離子污染能夠?qū)ι鷳B(tài)環(huán)境、農(nóng)田及作物、生活飲用水等產(chǎn)生頗為嚴重的影響,如果人體中鋅含量超標,不僅會導(dǎo)致人類出現(xiàn)嘔吐、昏迷、惡心等狀況,還會出現(xiàn)致癌、致人死亡的風(fēng)險及狀況,因此電鍍廠工業(yè)廢水中的鋅離子污染不容小覷,應(yīng)得到十分的關(guān)注。因此本研究以水泥固化與石灰固化為處理電鍍廠工業(yè)廢水中鋅離子的兩種固化工藝,本試驗以濃縮減量化的鍍鋅廠工業(yè)廢水為直接研究對象,分別對不同pH的鍍鋅廠工業(yè)廢水進行水泥固化與石灰固化處理,從固化劑添加比例、養(yǎng)護時間、固化溫度、pH等方面進行分析研究,通過對固化塊抗壓強度與固化塊浸出液鋅離子濃度的測定來確定水泥固化工藝與石灰固化工藝的參數(shù),試驗結(jié)果表明:(1)水泥固化固化參數(shù)是鍍鋅廠工業(yè)廢水pH為7.0、養(yǎng)護時間為21 d、固化溫度為25℃、固化劑添加比例為60%水泥和40%蛭石,在此處理下,制得的水泥固化塊抗壓強度是41.8Mpa,符合GB14569.1-2011《低中水平放射性廢物固體性能要求-水泥固化體》中水泥固化體試樣抗壓強度不應(yīng)小于7Mpa的標準要求;對應(yīng)的固化塊浸出液鋅離子濃度為0.029mg/L,遠小于GB5085.3-2007《危險廢物鑒別標準浸出毒性鑒別》中鋅浸出濃度最大為100mg/L的標準。(2)石灰固化固化參數(shù)是鍍鋅廠工業(yè)廢水pH為7.0、養(yǎng)護時間為14 d、固化溫度為25℃、固化劑添加比例為60%石灰、30%水泥和10%沙礫,在此處理下,制得的石灰固化塊抗壓強度是3.05Mpa,固化塊浸出液鋅離子濃度為0.156 mg/L。(3)鍍鋅廠工業(yè)廢水pH為7.0,水泥固化與石灰固化固化劑添加比例分別為90%水泥+10%蛭石;90%石灰+0%水泥+10%砂礫時最大廢水處理量分別為330ml、700ml。(4)固化塊浸出液鋅離子濃度與抗壓強度呈現(xiàn)出負極顯著相關(guān)性,抗壓強度越高,鋅離子濃度越低,固化效果越好。(5)通過使用X-射線衍射儀確定出水泥固化塊與石灰固化塊中的主要礦物成分為輝石。水泥固化塊抗壓強度遠遠高于石灰固化塊抗壓強度,固化塊浸出液鋅離子濃度明顯低于石灰固化塊浸出液鋅離子濃度。因此,建議水泥固化作為鍍鋅廠工業(yè)廢水中鋅離子的首選固化工藝。
[Abstract]:The pollution of industrial wastewater from electroplating plants is an urgent problem to be solved in the course of the development of modern society. The environment around the electroplating plants, such as farmland, rivers and groundwater, has also been seriously polluted. It even affects human health. Among them, zinc ion pollution can have a rather serious impact on the ecological environment, farmland, crops, drinking water, etc. If the human body's zinc content exceeds the standard, it will not only lead to vomiting and coma in human beings. Nausea and other conditions can also lead to carcinogenic and fatal risks and conditions. Therefore, the contamination of zinc ions in the wastewater from electroplating plants should not be underestimated. Therefore, cement solidification and lime curing are the two curing processes for the treatment of zinc ion in electroplating plant wastewater, and the concentration and reduction of zinc plating plant wastewater is the direct research object of this study. The industrial wastewater of galvanizing plant with different pH was treated by cement curing and lime curing respectively. The ratio of curing agent, curing time, curing temperature and pH were analyzed and studied. Through the determination of the compressive strength of the solidified block and the concentration of zinc ion in the leaching solution of the solidified block, the parameters of the cement curing process and the lime curing process are determined. The results show that the curing parameters of cement are pH 7.0, curing time 21 days, curing temperature 25 鈩，

本文編號：1568961