Ikaite formation in streams affected by steel waste leachate: First report and potential impact on contaminant dynamics
Ikaite formation in streams affected by steel waste leachate: First report and potential impact on contaminant dynamics
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受钢铁废料渗滤液影响的溪流中的伊凯特形成：第一份报告及其对污染物动态的潜在影响
DOI：
10.1016/j.chemgeo.2023.121842
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发表时间：
2024
期刊：
影响因子：
3.9
通讯作者：
Bastianini L
中科院分区：
文献类型：
--
作者：
Bastianini L
高碱性（pH 9-12）沃茨可能来自一系列全球重要且对环境有影响的工业过程，如石灰、钢铁和水泥生产、氧化铝精炼和能源生产（例如燃烧灰）。此类残留物储存地点通常具有极端的地球化学条件，可能对水生生物造成危害，但很快成为资源回收和碳捕获计划的关键焦点。这些地点的矿物沉淀速率非常高，可能会导致目前尚未完全了解的瞬态矿物的形成。因此，我们对碳预算的估计和对高碱性场地痕量金属动力学的理解目前是有限的。这项研究提供了一个显着的进步的基础上，通过识别和化学分析的瞬态矿物形成的网站接收高pH值（>11）钢渣浸出液在北方英格兰的特点，超碱性碳酸盐系统。虽然大多数的次生沉积物在研究地点似乎是由方解石为主，这项研究提供了第一个帐户的ikaite（CaCO3.6H2O）结晶内钢渣渗滤液，使用新的领域（傅立叶变换红）支持快速实验室（X射线衍射）验证。研究表明，伊卡石是一种次生矿物，其主相为无定形碳酸钙（ACC）。对这些受钢渣沥滤液影响的沃茨中形成的伊凯特进行的微量元素分析表明，伊凯特具有很强的亲和力，可吸收相对较大的潜在有害金属（如铅和镉）。重要的是，ikaite仅在低温（−4至8 °C）下稳定，因此，鉴于其在春季变暖事件期间释放有害污染脉冲的可能性，因此受到严重关注。这些发现提供了对高碱性场地碳酸盐沉淀过程的更好理解，这反过来又会影响全球这些场地未来围绕矿物碳酸化，微量金属动力学和环境修复的研究工作。
Highly alkaline (pH 9–12) waters can arise from a range of globally significant and environmentally impactful industrial processes such as lime, steel and cement production, alumina refining and energy generation (e.g. combustion ashes). Such residue storage sites are often characterized by extreme geochemical conditions that can be hazardous to aquatic life but are quickly becoming a critical focus for resource recovery and carbon capture initiatives. The very high rates of mineral precipitation at these sites can give rise to the formation of transient minerals that are not currently well understood. As such our estimates of carbon budgets and understanding of trace metal dynamics at highly alkaline sites is currently limited. This study provides a significant advancement in the basis for characterising hyperalkaline carbonate systems through identification and chemical analysis of transient minerals forming in sites receiving high pH (>11) steel slag leachate in northern England. Whilst most of the secondary deposits at the study sites appear to be dominated by calcite, this study provides the first account of ikaite (CaCO3.6H2O) crystallization within steel-slag leachate, using novel field (Fourier Transform Infra-Red) supported by rapid laboratory (X-Ray Diffraction) validation. This study suggests that ikaite is a secondary mineral with a primary phase being amorphous calcium carbonate (ACC). Trace element analysis of ikaite forming in these steel-slag leachate affected waters is demonstrates its strong affinity to incorporate relatively large inventories of potentially harmful metals (e.g. lead and cadmium). Importantly, ikaite is only stable at low temperatures (−4 to 8 °C) and thus is of significant concern given its potential to release hazardous pulses of contamination during warming events in the spring. The findings provide an improved understanding of carbonate precipitation processes at highly alkaline sites which in turn should influence future research endeavours around mineral carbonation, trace metal dynamics and environmental remediation at these sites globally.
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影响因子：
5
作者：
S. Papadimitriou;H. Kennedy;P. Kennedy;Davis Thomas
通讯作者：
S. Papadimitriou;H. Kennedy;P. Kennedy;Davis Thomas
DOI：
--
发表时间：
1998
期刊：
影响因子：
--
作者：
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通讯作者：
Toshihiko Ito
影响因子：
3.4
作者：
R. Boch;M. Dietzel;P. Reichl;A. Leis;A. Baldermann;F. Mittermayr;P. Pölt
通讯作者：
R. Boch;M. Dietzel;P. Reichl;A. Leis;A. Baldermann;F. Mittermayr;P. Pölt
伊卡石到方解石的转变：对古气候研究的影响
影响因子：
5
作者：
Madeleine L. Vickers;Martin Vickers;R. Rickaby;Hanxiao Wu;S. Bernasconi;C. Ullmann;G. Bohrmann;R. Spielhagen;H. Kassens;Bo Pagh Schultz;C. Alwmark;N. Thibault;C. Korte
通讯作者：
C. Korte
重金属模型混合物对虹鳟鱼生物学参数的影响
DOI：
--
发表时间：
2006
期刊：
影响因子：
--
作者：
M. Zita
通讯作者：
M. Zita