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首页> 外文期刊>Journal of environmental science and health >Impact of pH buffer capacity of sediment on dechlorination of atrazine using zero valent iron
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Impact of pH buffer capacity of sediment on dechlorination of atrazine using zero valent iron

机译:沉淀物的pH缓冲能力对零价铁对at去津脱氯的影响

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This research investigated the role of the pH buffer capacity of sediment on the dechlorination of atrazine using zero valent iron (ZVI). The buffer capacity of the sediment was quantified by batch experiments and estimated to be 5.0 cmol OH~- • pH~-. The sediments were spiked with atrazine at 7.25-36.23 mg kg~(-1) (6.21 × 10~(-7)-3.09 × 10~(-6) mol atrazine • g~(-1) sediment) for the batch experiments. The buffer capacity of the sediment maintained the sediment suspension at neutral pH, thereby enabling continuous dechlorination until the buffer capacity of the sediment was depleted. The pseudo-first order dechlorination constants were estimated to be in the range of 1.19 × 10~(-2) - 7.04 × 10~(-2) d~(-1) for the atrazine-spiked sediments.
机译:这项研究调查了沉积物的pH缓冲容量对零价铁(ZVI)对at去津脱氯的作用。沉淀物的缓冲能力通过分批实验进行定量,估计为5.0 cmol OH〜-•pH〜-。用7.25-36.23 mg kg〜(-1)(6.21×10〜(-7)-3.09×10〜(-6)mol阿特拉津•g〜(-1)沉淀物)的阿特拉津掺入沉淀物进行批处理实验。沉淀物的缓冲能力将沉淀物悬浮液保持在中性pH值,从而能够进行连续脱氯,直到耗尽了沉淀物的缓冲能力。阿特拉津加标沉积物的拟一阶脱氯常数估计为1.19×10〜(-2)-7.04×10〜(-2)d〜(-1)。

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