Treatment of coking wastewater by using manganese and magnesium ores

被引：53

作者：

Chen, Tianhu ^{[1
]}

Huang, Xiaoming ^{[1
]}

Pan, Min ^{[1
]}

Jin, Song ^{[2
,3
]}

Peng, Suchuan ^{[1
]}

Fallgren, Paul H. ^{[4
]}

机构：

[1] Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Peoples R China

[2] MWH Amer, Ft Collins, CO 80525 USA

[3] Univ Wyoming, Dept Civil & Architectural Engn, Laramie, WY 82071 USA

[4] Western Res Inst, Laramie, WY 82072 USA

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 168卷 / 2-3期

关键词：

Ammonium; Coking wastewater; Manganese ore; Magnesia; Phenol; Phosphate; Struvite; STRUVITE CRYSTALLIZATION; CATALYTIC-OXIDATION; ORGANIC POLLUTANTS; REMOVAL; PRECIPITATION; PHOSPHORUS; PHOSPHATE; AMMONIUM; NITROGEN; WASTEWATERS;

D O I：

10.1016/j.jhazmat.2009.02.101

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study investigated a wastewater treatment technique based on natural minerals. A two-step process using manganese (Mn) and magnesium (Mg) containing ores were tested to remove typical contaminants from coking wastewater. Under acidic conditions, a reactor packed with Mn ore demonstrated strong oxidizing capability and destroyed volatile phenols, chemical oxygen demand (COD), and sulfide from the coking wastewater. The effluent was further treated by using Mg ore to remove ammonium-nitrogen and phosphate in the form of magnesium ammonium phosphate (struvite) precipitates. When pH of the wastewater was adjusted to 1.2, the removal efficiencies for COD, volatile phenol and sulfide reached 70%, 99% and 100%, respectively. During the second step of precipitation, up to 94% of ammonium was removed from the aqueous phase, and precipitated in the form of struvite with phosphorus. The struvite crystals showed a needle-like structure. X-ray diffraction and transmission electron microscopy were used to characterize the crystallized products. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：843 / 847

页数：5

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