本文選題：灼燒 + 凈水污泥�。� 參考：《環(huán)境科學(xué)》2017年09期

【摘要】：研究了不同投加方式下(混勻和覆蓋)灼燒凈水污泥對外源磷的累積吸附效果,以及吸附外源磷后底泥等溫吸附效果和在厭氧條件下內(nèi)源磷釋放情況.結(jié)果表明,混勻和覆蓋條件下,底泥對上覆水中磷的累積吸附量分別為11.496 mg和11.042 mg,明顯高于對照實驗(7.219 mg).通過對吸附外源磷后的底泥進行等溫吸附實驗,發(fā)現(xiàn)混勻條件和覆蓋條件下磷最大吸附量(Smax)均有所增加,并且前者(7.795 mg·g~(-1))要高于后者(6.807 mg·g~(-1)),但磷平衡濃度(EPC0)前者(0.83mg·L~(-1))卻明顯大于后者(0.64 mg·L~(-1)),表明混勻條件下內(nèi)源磷更容易釋放.在厭氧環(huán)境下,混勻方式內(nèi)源磷釋放量僅為0.93 mg,不僅低于覆蓋(1.49 mg),也明顯低于對照實驗(7.76 mg).覆蓋條件下比釋放速率的平均值(0.006 14)大于混勻(0.003 96),并均低于對照實驗.這說明混勻?qū)?nèi)源磷的持留能力更強.暗示了單純用EPC0值來評價底泥對磷的固定能力是不妥的.
[Abstract]:In this paper, the accumulative adsorption effect of exogenous phosphorus on sewage sludge was studied under different adding methods (mixing and mulching), and the isothermal adsorption effect of sediment and the release of endogenous phosphorus under anaerobic condition were also studied. The results showed that the accumulative adsorption capacity of phosphorus in the overlying water was 11.496 mg and 11.042 mg, respectively, which was significantly higher than that in the control experiment (7.219mg / g). Through the isothermal adsorption experiment of the sediment adsorbed with exogenous phosphorus, it was found that the maximum adsorption capacity of phosphorus (S _ max) increased under the conditions of mixing and covering. The former (7.795 mg / g) was higher than the latter (6.807 mg / g), but the phosphorus equilibrium concentration was 0.83 mg / L ~ (-1), which was significantly higher than that of the latter (0.64 mg / L ~ (-1), indicating that endogenous phosphorus was released more easily under mixed conditions. In anaerobic environment, the endogenous phosphorus release was only 0.93 mg, which was not only lower than that of mulching 1.49 mg / g, but also significantly lower than that of control experiment (7.76 mg / g). The average specific release rate under mulching condition was 0.006.14), which was higher than that of the mixture (0.003 96g), and was lower than that of the control experiment. This indicates that the retention of endogenous phosphorus by blending is stronger. It suggests that it is inappropriate to use EPC0 to evaluate the phosphorus fixation ability of sediment.
【作者單位】： 蘇州科技大學(xué)環(huán)境科學(xué)與工程學(xué)院;
【基金】：國家自然科學(xué)基金項目(51278523) 江蘇省“六大人才高峰”項目(2013-JNHB-022) 水處理技術(shù)與材料協(xié)同創(chuàng)新中心項目
【分類號】：X703

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