Insight into the promotion mechanism of humic acid on arsenopyrite bioleaching mediated by Acidithiobacillus ferrooxidans
Arsenopyrite is an important gold-bearing sulfide mineral, and pretreatment is essential before gold extraction to maximize gold recovery. Bioleaching, with its advantages of simple operation and environmental friendliness, has received widespread attention over the past decade. However, the low eff...
Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
|
| Series: | Results in Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123025024752 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850066813584408576 |
|---|---|
| author | Baojun Yang Xin Zhang Yuling Liu Xin Sun Yang Liu Jun Wang Shitong Liu Rui Liao Guanzhou Qiu |
| author_facet | Baojun Yang Xin Zhang Yuling Liu Xin Sun Yang Liu Jun Wang Shitong Liu Rui Liao Guanzhou Qiu |
| author_sort | Baojun Yang |
| collection | DOAJ |
| description | Arsenopyrite is an important gold-bearing sulfide mineral, and pretreatment is essential before gold extraction to maximize gold recovery. Bioleaching, with its advantages of simple operation and environmental friendliness, has received widespread attention over the past decade. However, the low efficiency and long cycle of bioleaching hinder its large-scale application. Humic acid (HA) is a potential substance that can enhance the bioleaching of arsenopyrite and has advantages such as ease of acquisition, and environmental friendliness. Currently, there is a lack of research on the promoting effect and mechanism of HA on the bioleaching of arsenopyrite under the action of mesophile microorganism. This study investigates the effects of HA mediated by Acidithiobacillus ferrooxidans on the arsenopyrite leaching behavior, the valence states and forms of arsenic. The results showed HA can promote the bioleaching of arsenopyrite and shorten the leaching cycle. The addition of 20 mg/L HA can significantly reduce the bioleaching cycle of arsenopyrite from 14 days (without HA) to 6 days. HA can promote the growth of microorganisms and enhance the Fe/S oxidation capacity of microorganisms. Meanwhile, HA can adsorb onto the mineral surface, facilitating the oxidation of arsenopyrite by Fe3+ adsorbed by HA, thereby promoting the bioleaching of arsenopyrite. This study offers new insights into shortening arsenopyrite bioleaching cycle. |
| format | Article |
| id | doaj-art-e79abc76fbaa4c859ca892c27c291b38 |
| institution | DOAJ |
| issn | 2590-1230 |
| language | English |
| publishDate | 2025-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Results in Engineering |
| spelling | doaj-art-e79abc76fbaa4c859ca892c27c291b382025-08-20T02:48:38ZengElsevierResults in Engineering2590-12302025-09-012710640510.1016/j.rineng.2025.106405Insight into the promotion mechanism of humic acid on arsenopyrite bioleaching mediated by Acidithiobacillus ferrooxidansBaojun Yang0Xin Zhang1Yuling Liu2Xin Sun3Yang Liu4Jun Wang5Shitong Liu6Rui Liao7Guanzhou Qiu8School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, China; Key Lab of Biohydrometallurgy of Ministry of Education, Changsha, Hunan, ChinaSchool of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, China; Key Lab of Biohydrometallurgy of Ministry of Education, Changsha, Hunan, ChinaSchool of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, China; Key Lab of Biohydrometallurgy of Ministry of Education, Changsha, Hunan, ChinaSchool of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, China; Key Lab of Biohydrometallurgy of Ministry of Education, Changsha, Hunan, ChinaSchool of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, China; Key Lab of Biohydrometallurgy of Ministry of Education, Changsha, Hunan, ChinaSchool of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, China; Key Lab of Biohydrometallurgy of Ministry of Education, Changsha, Hunan, ChinaSchool of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, China; Key Lab of Biohydrometallurgy of Ministry of Education, Changsha, Hunan, ChinaSchool of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, China; Key Lab of Biohydrometallurgy of Ministry of Education, Changsha, Hunan, China; Corresponding author.School of Minerals Processing & Bioengineering, Central South University, Changsha, Hunan, China; Key Lab of Biohydrometallurgy of Ministry of Education, Changsha, Hunan, ChinaArsenopyrite is an important gold-bearing sulfide mineral, and pretreatment is essential before gold extraction to maximize gold recovery. Bioleaching, with its advantages of simple operation and environmental friendliness, has received widespread attention over the past decade. However, the low efficiency and long cycle of bioleaching hinder its large-scale application. Humic acid (HA) is a potential substance that can enhance the bioleaching of arsenopyrite and has advantages such as ease of acquisition, and environmental friendliness. Currently, there is a lack of research on the promoting effect and mechanism of HA on the bioleaching of arsenopyrite under the action of mesophile microorganism. This study investigates the effects of HA mediated by Acidithiobacillus ferrooxidans on the arsenopyrite leaching behavior, the valence states and forms of arsenic. The results showed HA can promote the bioleaching of arsenopyrite and shorten the leaching cycle. The addition of 20 mg/L HA can significantly reduce the bioleaching cycle of arsenopyrite from 14 days (without HA) to 6 days. HA can promote the growth of microorganisms and enhance the Fe/S oxidation capacity of microorganisms. Meanwhile, HA can adsorb onto the mineral surface, facilitating the oxidation of arsenopyrite by Fe3+ adsorbed by HA, thereby promoting the bioleaching of arsenopyrite. This study offers new insights into shortening arsenopyrite bioleaching cycle.http://www.sciencedirect.com/science/article/pii/S2590123025024752ArsenopyriteMesophileHumic acidBioleaching cycleArsenic |
| spellingShingle | Baojun Yang Xin Zhang Yuling Liu Xin Sun Yang Liu Jun Wang Shitong Liu Rui Liao Guanzhou Qiu Insight into the promotion mechanism of humic acid on arsenopyrite bioleaching mediated by Acidithiobacillus ferrooxidans Results in Engineering Arsenopyrite Mesophile Humic acid Bioleaching cycle Arsenic |
| title | Insight into the promotion mechanism of humic acid on arsenopyrite bioleaching mediated by Acidithiobacillus ferrooxidans |
| title_full | Insight into the promotion mechanism of humic acid on arsenopyrite bioleaching mediated by Acidithiobacillus ferrooxidans |
| title_fullStr | Insight into the promotion mechanism of humic acid on arsenopyrite bioleaching mediated by Acidithiobacillus ferrooxidans |
| title_full_unstemmed | Insight into the promotion mechanism of humic acid on arsenopyrite bioleaching mediated by Acidithiobacillus ferrooxidans |
| title_short | Insight into the promotion mechanism of humic acid on arsenopyrite bioleaching mediated by Acidithiobacillus ferrooxidans |
| title_sort | insight into the promotion mechanism of humic acid on arsenopyrite bioleaching mediated by acidithiobacillus ferrooxidans |
| topic | Arsenopyrite Mesophile Humic acid Bioleaching cycle Arsenic |
| url | http://www.sciencedirect.com/science/article/pii/S2590123025024752 |
| work_keys_str_mv | AT baojunyang insightintothepromotionmechanismofhumicacidonarsenopyritebioleachingmediatedbyacidithiobacillusferrooxidans AT xinzhang insightintothepromotionmechanismofhumicacidonarsenopyritebioleachingmediatedbyacidithiobacillusferrooxidans AT yulingliu insightintothepromotionmechanismofhumicacidonarsenopyritebioleachingmediatedbyacidithiobacillusferrooxidans AT xinsun insightintothepromotionmechanismofhumicacidonarsenopyritebioleachingmediatedbyacidithiobacillusferrooxidans AT yangliu insightintothepromotionmechanismofhumicacidonarsenopyritebioleachingmediatedbyacidithiobacillusferrooxidans AT junwang insightintothepromotionmechanismofhumicacidonarsenopyritebioleachingmediatedbyacidithiobacillusferrooxidans AT shitongliu insightintothepromotionmechanismofhumicacidonarsenopyritebioleachingmediatedbyacidithiobacillusferrooxidans AT ruiliao insightintothepromotionmechanismofhumicacidonarsenopyritebioleachingmediatedbyacidithiobacillusferrooxidans AT guanzhouqiu insightintothepromotionmechanismofhumicacidonarsenopyritebioleachingmediatedbyacidithiobacillusferrooxidans |