Removing contaminants from tannery wastewater by chemical precipitation using CaO and Ca(OH)<sub>2</sub>

Adriana Reyes-Serrano; Joel E. López-Alejo; Manuel A. Hernández-Cortázar; Ignacio Elizalde

doi:10.1016/j.cjche.2019.12.023

Your Location：

Home >

Browse articles >

Removing contaminants from tannery wastewater by chemical precipitation using CaO and Ca(OH)₂

Process Systems Engineering and Process Safety | Updated：2026-01-06

- Removing contaminants from tannery wastewater by chemical precipitation using CaO and Ca(OH)₂
- Removing contaminants from tannery wastewater by chemical precipitation using CaO and Ca(OH)₂
- 中国化学工程学报（英文版） 2020年28卷第4期页码：1107-1111
- Affiliations：
  
  Instituto Politécnico Nacional, Centro Mexicano para la Producción más Limpia, Ciudad de México,Mexico,07340
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2019.12.023
  中图分类号：
- 纸质出版：2020
- Accepted：
Scan QR Code
Adriana Reyes-Serrano, Joel E. López-Alejo, Manuel A. Hernández-Cortázar, 等. Removing contaminants from tannery wastewater by chemical precipitation using CaO and Ca(OH)₂[J]. 中国化学工程学报（英文版）, 2020,28(4):1107-1111. DOI: 10.1016/j.cjche.2019.12.023.

[J]. 中国化学工程学报, 2020, 28(4): 1107-1111.
Adriana Reyes-Serrano, Joel E. López-Alejo, Manuel A. Hernández-Cortázar, 等. Removing contaminants from tannery wastewater by chemical precipitation using CaO and Ca(OH)₂[J]. 中国化学工程学报（英文版）, 2020,28(4):1107-1111. DOI: 10.1016/j.cjche.2019.12.023. DOI：

[J]. 中国化学工程学报, 2020, 28(4): 1107-1111. DOI： 10.1016/j.cjche.2019.12.023.

摘要

Abstract

The removal of Cr

sulfates and Chemical Oxygen Demand (COD) from industrial tannery wastewater by chemical precipitation was carried out using Calcium oxide (CaO) and Calcium hydroxide (Ca(OH)

). Different doses of alkalis

ranging from deficiency to excess hydroxyl species over the stoichiometric necessary

were used to remove theoretically the 100% of Cr [0.3-3.2 g alkali·(g Cr

)

-1

]

. The precipitation was carried out at room temperature

10 min of vigorous stirring

200 r·min

-1

and a settling time of 24 h

followed by separation and characterization of liquid product. As result of addition of alkalis

pH underwent increase as did the alkali concentration. The removal of Cr

and sulfates also increased as alkali concentration did

although for first species the changes at higher alkali contents were less evident. COD removal on the other hand

did not follow a unique trend

instead exhibited a maximum. Based on our results

selection of a specific dose of alkali was carried out taking as reference the efficiency on total chromium removal

keeping the pH in the range 7 to 9 to ensure Cr precipitation as chromium hyd

roxide. With those conditions

jar test was used to produce enough liquid product in order to determine the removal percent of several other species. The removal percent of the species was as follows: Cr

ZnSO

FeSO

-1

NiSO

[Fe(CN)

]

at 99.8%

66.9%

99.6%

21.4%

70.9%

52.8% and 76.4% with CaO

and 99.8%

61.6%

99.9%

7.1%

84.0%

54.4% and 90.5% with Ca(OH)

respectively.

关键词

Keywords

references

浏览量

333

Downloads

CSCD

文章被引用时，请邮件提醒。

Submit

工具集

关联资源

Decontamination of Cr(VI) from water using sewage sludge-derived biochar: Role of environmentally persistent free radicals

Rapid removal of boron from liquid media using wood-based functional materials modified with N-methyl-d-glucosamine

The inhibition difference and mechanism research of N2-water mist two-phase medium on CH4, LPG and H2 explosion flame acceleration characteristic

The effects of Cl- and Ca2+ on corrosion and scale formation of 3Cr steel in CO2 flooding produced fluid

Thermal coupling study during the co-processing of coal and biomass in the lab-scale adiabatic reactor

Removing contaminants from tannery wastewater by chemical precipitation using CaO and Ca(OH)2

Removing contaminants from tannery wastewater by chemical precipitation using CaO and Ca(OH)2

DOI：10.1016/j.cjche.2019.12.023

摘要

Abstract

关键词

Keywords

references

Removing contaminants from tannery wastewater by chemical precipitation using CaO and Ca(OH)₂

Removing contaminants from tannery wastewater by chemical precipitation using CaO and Ca(OH)₂