Inhibition of pyrite oxidation by surface treatment
Inhibition of pyrite oxidation by surface treatment
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DOI：
10.1016/s0048-9697(96)05410-1
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发表时间：
1997-03-20
影响因子：
9.8
通讯作者：
Goldsack, D
中科院分区：
文献类型：
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作者：
Belzile, N;Maki, S;Goldsack, D
黄铁矿样品进行了分析，从两个不同的位置，目的是确定在钝化剂的存在下发生的氧化抑制的程度。将每个样品暴露于空气和9%H2O2作为氧化剂在特定的时间段内，在黄铁矿表面上存在和不存在氧化铁层。将样品提交给钝化剂，其产生保护和改变表面的可逆相互作用。涂层剂的类型（乙酰丙酮，腐殖酸，铵木质素磺酸盐，草酸或硅酸钠）和氧化前的表面质量被用来确定钝化剂的有效性。由于过氧化氢作为氧化剂的苛刻性，因此使用过氧化氢来提供结果的长期概述。空气氧化结果与过氧化物结果显示的趋势相关，在每种样品类型中，使用钝化（特别是预氧化）被证明是有效的。在过氧化物存在下，通过预氧化处理，乙酰丙酮能够将NWT样品中的氧化降低53%（K.C.样品）和硅酸钠在K. C.样本（NWT样本中的42%）。(C)1997年Elsevier Science B.V.
Pyrite samples were analyzed from two distinct locales with the intent of determining the extent of oxidative inhibition occurring in the presence of a passivating agent. Each sample was exposed to air and 9% H2O2 as oxidizing agents over specific time periods with and without the presence of an iron oxide layer on the pyritic surface. The samples were submitted to passivating agents which created reversible interactions protecting and altering the surface. The type of coating agent (acetyl acetone, humic acids, ammonium lignosulfonates, oxalic acid or sodium silicate) and the quality of the surface prior to oxidation were used to determine the effectiveness of the passivating agents. Hydrogen peroxide was utilized to provide a long-term overview of the results because of its harshness as an oxidizing agent. The air oxidation results are linked to the trend shown by the peroxide results and, in each sample type, the use of passivation (especially with pre-oxidation) proved to be effective. In the presence of peroxide with pre-oxidative treatment, the acetyl acetone was able to reduce oxidation by 53% in the NWT sample (22% in the K.C. sample) and sodium silicate reduced oxidation by 55% in the K.C. sample (42% in the NWT sample). (C) 1997 Elsevier Science B.V.