_含氰廢水加NaClO后時(shí)間與PH、ORP關(guān)系實(shí)驗(yàn)?zāi)康模河^察反應(yīng)PHORP氰變化，找出反應(yīng)最佳控制點(diǎn)謝謝閱讀實(shí)驗(yàn)步驟：（1）測(cè)量原水PHORP氰含量（2）調(diào)節(jié)原水PH至11，在攪拌情況下加入NaClO，并間隔2分鐘測(cè)量一次ORPPH，間隔15分鐘測(cè)一次氰精品文檔放心下載（3）調(diào)節(jié)原水PH至10，在攪拌情況下加入NaClO，并間隔2分鐘精品文檔放心下載測(cè)量一次ORPPH，間隔15分鐘測(cè)一次氰實(shí)驗(yàn)現(xiàn)象：原水透明略帶黃色，加入次氯酸鈉溶液變藍(lán)，且次氯酸鈉量大沉淀多，精品文檔放心下載但在PH10情況下，加入6:18:1藥量次氯酸鈉，溶液藍(lán)偏綠色。原水?dāng)?shù)據(jù)：原水PH=7.3,ORP=213mv,CN=410mg/l前處理：PH調(diào)至11感謝閱讀實(shí)驗(yàn)數(shù)據(jù)：組表1-1加入不同量次氯酸鈉后溶液ORP與PH變化精品文檔放心下載A1:NaClO(4:1)A2:NaClO(2:1)A3:NaClO(6:1)A4:NaClO(8:1)時(shí)間ORPPHORPPHORPPHORPPH050010.196852610.6954910.96259010.128210.8858010.6360710.86461410.18910.8259910.662310.746 619 10.07 92 10.79 612 10.56 636 10.61感謝閱讀_859910.029410.7861510.4862010.46106039.979610.7761610.3466010.1126089.99710.7563810.17319.64146129.859810.756669.847489.45166159.89810.767019.677509.34186179.759910.757079.587519.3206189.7210010.757099.547499.26226199.6910010.747089.457479.24246259.6510110.747059.447439.21266339.6410210.737029.387429.2286329.6310210.726989.367399.19306299.6210310.746939.347359.19326289.6110410.746899.337349.18346249.5910410.736859.327339.18366229.5910510.736809.317329.17386199.5710610.726769.317309.17406159.5710610.716709.37299.17426119.5610710.76659.37279.17446089.5510810.686609.37269.16466039.5510810.686549.297249.16486009.5410910.676489.297239.16505979.5310910.666449.287229.16525939.5211010.666409.287209.16545909.5211110.666349.287199.16_565879.5111210.656289.287179.16585829.511210.656239.277169.16605859.511310.646189.277169.164h2099.3815010.462749.166408.96表1-2加入不同量次氯酸鈉后溶液氰含量變化A1:NaClO(4:1)A2:NaClO(2:1)A3:NaClO(6:1)A4:NaClO(8:1)時(shí)間氰含量氰含量氰含量氰含量15min513210.230min21320.40.245min2.5130260min2.841362.15)vm(RPO

800700600500400300200100

_1:41:21:61:80 10 20 30 40 50 60T(min)圖1-1ORP與反應(yīng)時(shí)間關(guān)系11.211.010.810.610.410.2HP 10.09.89.69.49.29.0

_4:12:16:18:10 10 20 30 40 50 60T(min)圖1-2PH與反應(yīng)時(shí)間關(guān)系_5.04.54.03.53.0

4:16:18:1-ncC

2.52.01.51.00.510 20 30 40 50 60T(min)通過上圖可以看出：1低于理論量ORP明顯小許多精品文檔放心下載高于理論量起始ORP相差不大，但次氯酸鈉量大ORP會(huì)上升的更高，之后會(huì)有個(gè)下降過程，其中以6：1下降最為明顯，而8：1下降趨勢(shì)較小精品文檔放心下載加入次氯酸鈉理論量，略有些氰未反應(yīng)次氯酸鈉2：1反應(yīng)在15min內(nèi)完成，次氯酸鈉4：1，6：1，8：1，精品文檔放心下載反應(yīng)在半小時(shí)內(nèi)完成，之后氰會(huì)逆反應(yīng)？_通過上圖可以看出：加入次氯酸鈉量越大，PH下降越大，但最后能趨于平穩(wěn)。謝謝閱讀B組PH=10表2-1加入不同量次氯酸鈉后溶液ORP與PH變化時(shí)間ORPPHORPPHORPPHORPPH06039.4260010.259310.926609.3526428.957329.0911510.467139.0746208.977618.812710.357108.9866068.917558.7713310.277008.9785878.917478.7513910.276908.98105678.927408.7514210.176748.99125438.937308.7414510.136668.99145068.957228.7414710.116578.99164308.967148.7314910.16459183688.967088.7315210.076389203248.967018.7315310.056299222848.966948.7315410.056229_242638.956878.7315510.046138.99262488.956818.7315610.046048.99282398.956748.7315710.035958.99302338.956688.7315710.035858.99322278.956608.7315810.035738.99342238.956548.7415810.025628.99362208.956468.7415910.025528.99382178.956408.7415910.015428.99402168.956338.74159105308.99422148.956268.751609.995158.99442138.956198.751609.985058.99462148.956128.751619.984949482118.956058.751619.974838.99502118.955958.771619.974738.99522108.955878.771619.974648.99542108.955778.771619.974588.99562098.945698.791629.964508.99582098.945578.791629.964368.99602098.945468.791629.964288.994h2258.822848.811749.82518.93表1-2加入不同量次氯酸鈉后溶液氰含量變化_A1NaClO4:1A2NaClO2:1A3NaClO6:1A1NaClO8:1氰含量01571303.55min3071333.52min456.51334min605.01304min表2-3ORP與反應(yīng)時(shí)間關(guān)系_通過上圖可以看出：1PH為10情況下，反應(yīng)完全度不如PH=11謝謝閱讀超過理論量，起始ORP高，下降快；低于理論量，起始ORP低，且緩慢上升感謝閱讀2-4PH與反應(yīng)時(shí)間關(guān)系PH與時(shí)間關(guān)系11.51110.5109.5NaClO量2：1NaClO量4：1HPNaClO量6：19NaClO量8：18.587.57010203040506070時(shí)間通過上圖可以看出：與PH11相比，PH更快平穩(wěn)，波動(dòng)更小。謝謝閱讀結(jié)論：1破氰反應(yīng)在半小時(shí)內(nèi)完成，半小時(shí)后反而有氰析出精品文檔放心下載2