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<p>濰坊潤茂環(huán)?？萍加邢薰?/p> <p>聯(lián)系人：王經(jīng)理</p> <p>手機：13325243297</p> <p>網(wǎng)址：m.773568.com</p> <p>地址：山東省濰坊市臨朐縣辛寨鎮鳳凰山工業(yè)園區</p> <a href="/?list/5">聯(lián)系我們</a> </div> </div> </div> <div id="jahr88s" class="ny_cr fr"> <div id="fxlge28" class="ny_content"> <div id="yhxz8o3" class="ny_tit"> <h1>無(wú)鉻鈍化和有鉻鈍化廢水處理技術(shù)</h1> <p>發(fā)布時(shí)間:2021-12-14 本文被閱讀 :514次 </p> </div> <div id="27q2l8z" class="ny_contxt"> <p>那么國家對于要求廢水的合理排放，有哪些處理技術(shù)呢？分別來(lái)看看無(wú)鉻鈍化劑和有鉻鈍化劑廢水在鍍鋅件上廢水處理技術(shù)的區別？在鍍鋅工藝中要使用大量的化工藥品。這些藥品中有些本身具有毒性，有些在使用過(guò)程中會(huì )產(chǎn)生有毒物質(zhì)。這些有毒物質(zhì)會(huì )通過(guò)大氣，廢水的形式對環(huán)境造成污染，從而對人類(lèi)的生存造成傷害。</p><p><br/></p><p>無(wú)鉻鈍化廢水處理的方法：首先測定廢水的總酸度T.A。然后計算：每立方米廢水用生石灰=T.A*0.63（千克）。生石灰配成水漿（請注意生石遇水發(fā)高熱，要采取相應的防護措施）。加入攪拌中的廢水內，經(jīng)三個(gè)小時(shí)以上可達PH10.5，廢水如果達不到PH10.5，則繼續攪拌并按0.3千克生石灰/每立方米廢水的比例追加生石灰。此后，靜置30分鐘以上，將上層清液（最好是濾液）移去另一槽，測定清液（最好是濾液）的游離堿度F.AL。計算：每立方米清液用硫酸=F.AL*0.5（千克）。清液中和后可正常排放。</p><p><br/></p><p>可以看到，無(wú)鉻鈍化劑由于不含有害重金屬，綠色環(huán)保，其廢水處理的方法也比較簡(jiǎn)單。</p><p><br/></p><p>那么有鉻鈍化廢水處理技術(shù)怎么做呢？</p><p><br/></p><p>鈍化工序中的廢水中主要是六價(jià)鉻，鋅離子和酸根離子，黑鈍化和草綠色鈍化中還含有少量銀，銅離子。</p><p><br/></p><p>鈍化工序中鉻酸鹽中六價(jià)鉻的毒性最強。國家標準中六價(jià)鉻的排放濃度為0.1mg/L。</p><p><br/></p><p>六價(jià)鉻的廢水處理方法是用還原劑將六價(jià)鉻還原成三價(jià)鉻，然后將三價(jià)鉻與堿反應形成氫氧化鉻沉淀而除去。</p><p><br/></p><p>可以看到，有鉻鈍化劑和無(wú)鉻鈍化劑相比較，廢水處理的方法就比較復雜，需要先轉換然后再用廢水處理的技術(shù)去排放。</p><p><br/></p> </div> <div id="ud92ns8" class="ny_fy"> <span>上一篇：<a class='newsnext' title='無(wú)鉻鈍化前鍍鋅處理的重要性' href='/?news/37'>無(wú)鉻鈍化前鍍鋅處理的重要性</a> </span> <span>下一篇：<a class='newsprev' title='無(wú)鉻鈍化劑較防銹油的優(yōu)勢' 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