A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cement hexavalent chromium reducing agent and preparation method thereof
The invention discloses a cement hexavalent chromium reducing agent, which is prepared from the following raw materials in parts by weight: 0.2-0.35 part of ferrous sulfate, 5-20 parts of antimony trioxide, 1-5 parts of a polycarboxylic acid hyperdispersant, 0.2-0.5 part of a defoaming agent, 70-90 parts of water and 10-15 parts of an activated carbon fiber supported nano-iron solution. According t o the invention, the activated carbon fiber supported nano-iron can remove Cr in the cement waste residues so as to reduce the harm to the environment and play a role in environment restoration, and antimony trioxide as a hexavalent chromium reduction component shows good reduction activity under the alkaline condition, is not sensitive to temperature and humidity, has great advantages compared with traditional ferrous salt and stannous salt reducing agents, and can keep the long-term effect of the reducing agent.
本发明公开了一种水泥六价铬还原剂，由以下重量份的原料制成：硫酸亚铁0.2‑0.35份、三氧化二锑5‑20份，聚羧酸超分散剂1‑5份，消泡剂0.2‑0.5份，水70‑90份和活性炭纤维负载型纳米铁溶液10‑15份。本发明采用活性炭纤维负载型纳米铁能够去除水泥废渣中的Cr,降低对环境的危害，起到环境修复的作用，三氧化二锑作为六价铬还原组分，在碱性条件下才表现出较好的还原活性，对温度和湿度不敏感，较传统的亚铁盐和亚锡盐类还原剂有很大的优势，可以保持还原剂长效性。
Cement hexavalent chromium reducing agent and preparation method thereof
The invention discloses a cement hexavalent chromium reducing agent, which is prepared from the following raw materials in parts by weight: 0.2-0.35 part of ferrous sulfate, 5-20 parts of antimony trioxide, 1-5 parts of a polycarboxylic acid hyperdispersant, 0.2-0.5 part of a defoaming agent, 70-90 parts of water and 10-15 parts of an activated carbon fiber supported nano-iron solution. According t o the invention, the activated carbon fiber supported nano-iron can remove Cr in the cement waste residues so as to reduce the harm to the environment and play a role in environment restoration, and antimony trioxide as a hexavalent chromium reduction component shows good reduction activity under the alkaline condition, is not sensitive to temperature and humidity, has great advantages compared with traditional ferrous salt and stannous salt reducing agents, and can keep the long-term effect of the reducing agent.
本发明公开了一种水泥六价铬还原剂，由以下重量份的原料制成：硫酸亚铁0.2‑0.35份、三氧化二锑5‑20份，聚羧酸超分散剂1‑5份，消泡剂0.2‑0.5份，水70‑90份和活性炭纤维负载型纳米铁溶液10‑15份。本发明采用活性炭纤维负载型纳米铁能够去除水泥废渣中的Cr,降低对环境的危害，起到环境修复的作用，三氧化二锑作为六价铬还原组分，在碱性条件下才表现出较好的还原活性，对温度和湿度不敏感，较传统的亚铁盐和亚锡盐类还原剂有很大的优势，可以保持还原剂长效性。
Cement hexavalent chromium reducing agent and preparation method thereof
一种水泥六价铬还原剂及其制备方法
SU SHUNFENG (author) / LIN YUANBIAO (author) / GUO ZHIHUI (author) / LUO XIANGHAN (author)
2021-11-19
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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