不同母质发育土壤中五氯酚的还原脱氯转化

Reductive dechlorination of transformation of Pentachlorophenol(PCP)with different parent material soil

研究了花岗岩和砂页岩赤红壤2种自然土壤中五氯酚(PCP)的还原转化过程,以及添加乳酸和蒽醌-2,6-磺酸钠(AQDS)对五氯酚还原转化速率的影响。采用一级反应动力学描述了五氯酚在土壤中的还原转化过程。结果表明,在空白处理(T1)条件下,花岗岩和砂页岩赤红壤中五氯酚的还原转化动力学常数分别为0.0083 d-1和0.0061 d-1;添加乳酸(T2)处理能提高五氯酚的还原转化速率,其动力学常数分别为0.0206 d-1和0.0113 d-1;同时添加乳酸和AQDS,五氯酚在土壤中速率常数提高至0.0336 d-1和0.0160 d-1。

Reductive transformation process of latcritic red soil derived from granite and arenaceous shale, and the influence for the reductive transformation rate of PCP to add lactic acid and Anthraquinone -2,6- sodium sulfonate （AQDS） were studied in this paper. Reductive transformation process of PCP in soil was descripted by first-order reaction kinetics. The results showed that reductive transformation kinetics constants with Pentachlorophenol （PCP） of lateritic red soil derived from granite and arenaceous shale were classified to 0.0083 d ^（-1） and 0.0061 d^（-1） under the T1 condiction ; the reductive transformation rate of PCP was improved by lactic acid （T2） treatment,and their kinetics constants were classified to 0.0206 d^（-1） and 0.0113 d^（-1）; kinetics constants of PCP in soil were classified to 0.0206 d^（-1） and 0.0113 d^（-1） under the candictions of adding lactic acid and AQDS together.