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class="b">公示公告</a> </div> <div class="child-content"> <div class="intro-con xgwow animate__fadeInUp"> <div class="detail-title xgwow animate__fadeInUp"> <h3 class="detail-cn">重金屬廢水處理的必要性</h3> <p class="detail-date"> 2022-11-23 14:31 </p> </div> <div class="detail-des xgwow animate__fadeInUp"> <p style="text-align: center;"> <img src="/upfiles/22/f7202208220958329432.png" alt=""> </p> <p style="text-indent: 2em; line-height: 1.5em; margin-bottom: 10px; margin-top: 10px;"><span style="font-size: 14px;">據調查，我國重金屬廢水中含砷、鉻、汞、重金屬的量約為2.21萬t，廢水排放總量為869萬t，在造成嚴重環境污染的同時，也導致了重金屬資源本身的極大浪費。在此背景下，加強對重金屬廢水處理技術已成為當前環境治理工作開展過程中的首要任務。</span></p><p style="text-indent: 2em; line-height: 1.5em; margin-bottom: 10px; margin-top: 10px;"><span style="font-size: 14px;">重金屬廢水中的砷、鉻、汞、鉛等元素及其化合物會被水中的植物、魚類等收集并沿食物鏈傳遞，對此類重金屬及其化合物進行分析可知，其能夠導致蛋白質與活性酶失活，從而引發代謝紊亂，極容易對人類健康與其他生物的生存和發展帶來嚴重威脅，因此有必要也必須加強對重金屬廢水處理技術的研究。</span></p><p style="text-indent: 2em; line-height: 1.5em; margin-bottom: 10px; margin-top: 10px;"><span style="font-size: 14px;">電解法處理重金屬廢水的原理為：在直流電作用下，廢水中帶正電的重金屬離子遷移到陰極，且在陰極獲得電子而被還原，所產生的金屬單質則沉淀到反應器的底部或是吸附到電極表面，實現廢水除鹽與水中重金屬的回收。</span></p><p style="text-indent: 2em; line-height: 1.5em; margin-bottom: 10px; margin-top: 10px;"><span style="font-size: 14px;">以電化學鍍鎳液為例，利用電解法對溫度T=80℃、pH=9且電流密度為8.0mA/cm2的鍍鎳液進行電解，結果發現，在循環條件下通電2h后，可從廢水中回收97.9%的金屬鎳。對基于電解法的重金屬廢水處理技術進行分析可知，該方法無需添加化學試劑，故不會產生二次污染，但在溶液(廢水)內部，隨著反應的逐漸進行，原溶液中金屬離子的濃度也逐漸下降，從而導致溶液電阻率升高，耗電量也隨之增加，故電解法并不適用于低濃度的重金屬廢水處理。</span></p> </div> <div class="detail-page"> <p>上一篇：沒有了 </p> <p>下一篇：<a href='/news/news_595.html#p'>屠宰場廢水的特性及來源</a> </p> </div> </div> </div> </section> </main>  <section class="section footer fp-auto-height">  <footer> <div class="inner footer-inner"> <div class="footer-top clearFix"> <div class="footer-left"> <a href=""> <img src="/img/logo-b.png" alt=""> </a> <p> 聯系人：涂經理 <br> 電話：15168291388 <br> 地址：杭州市余杭區文一西路1326號利爾達科技園6棟1308室 <br> </p> </div> <ul class="footer-right"> <li><a href="/aboutus/aboutus_1.html" >走進鵬達</a> <ul 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