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奥利文的重金属去除潜力

C M van Genuchten¹, H Hamaekers², D Fraiquin³

¹Department of Geochemistry, Geological Survey of Denmark and Greenland (GEUS), Øster Voldgade 10, Copenhagen, Denmark.

|September 14, 2023

概括

奥利文颗粒有效地从工业废水中去除Cd和Pb等重金属,某些金属的效率超过90%. 这种天然矿物质通过沉金属作为碳酸盐和酸盐,为废水处理提供了一个有前途的解决方案.

科学领域:

环境科学环境科学
地质化学地质化学
材料科学材料科学材料科学

背景情况:

工业废水通常含有有毒的重金属 (如,),需要在排放前进行处理.
严格的法规需要有效的方法来减轻生态系统和人类健康中的重金属污染.
橄是一种天然矿物质,显示出重金属去除的潜力,但其效率和机制尚未完全理解.

研究的目的:

研究橄素颗粒在从工业废水中去除各种重金属的效率.
为了阐明由奥利文去除重金属的基本机制.
评估奥利文作为一种可持续的,基于矿物质的废水处理解决方案.

主要方法:

用粉末和颗粒形式的橄素进行了批量金属去除实验.
一系列金属污染物 (Co,Ni,Cd,Zn,Cu,Pb) 在初始度为1500μg/L时进行了测试.
固相特征利用基于同步的X射线技术和电子显微镜来识别去除途径.

主要成果:

奥利文去除了90%以上的初始重金属,效率因金属而异:Co ≤ Cd ≤ Ni < Zn < Cu < Pb.
金属去除与pH值显著增加 (从7到10) 相关联,归因于奥利文溶解.
鉴定结果显示,金属碳酸盐和酸盐通过二次沉去除金属,而pH值增加则有助于此.

结论:

奥利文在从废水中去除各种重金属方面表现出高效率.
主要机制涉及二次矿物沉 (碳酸盐,酸盐),由pH值升高驱动.
奥利文是一种可行的,天然的矿物质基吸附剂,用于处理受重金属污染的工业废水.

关键词:

工业废水的废水是工业废水.矿物质溶解过程中的矿物质.二次矿物沉二次矿物沉处理水处理水处理水处理去除的方法是去除.

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