Contrasting effects of biochar and hydrothermally treated coal gangue on leachability, bioavailability, speciation and accumulation of heavy metals by rapeseed in copper mine tailings

Munir, Mehr Ahmed Mujtaba1,2; Liu, Guijian1,2; Yousaf, Balal1,3; Mian, Md Manik1,2; Ali, Muhammad Ubaid4,5; Ahmed, Rafay1,2; Cheema, Ayesha Imtiyaz1,2; Naushad, Mu6

2020-03-15

10.1016/j.ecoenv.2020.110244

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY   影响因子和分区

0147-6513

1090-2414

The purpose of this research was to examine the influence of hydrothermally treated coal gangue (HTCG) with and without biochar (BC) on the leaching, bioavailability, and redistribution of chemical fractions of heavy metals (HMs) in copper mine tailing (Cu-MT). An increase in pH, water holding capacity (WHC) and soil organic carbon (SOC) were observed due to the addition of BC in combination with raw coal gangue (RCG) and HTCG. A high Cu and other HMs concentration in pore water (PW) and amended Cu-MT were reduced by the combination of BC with RCG and/or HTCG, whereas individual application of RCG slightly increased the Cu, Cd, and Zn leaching and bioavailability, compared to the unamended Cu-MT. Sequential extractions results showed a reduction in the exchangeable fraction of Cu, Cd, Pb, and Zn and elevation in the residual fraction following the addition of BC-2% and BC-HTCG. However, individual application of RCG slightly increased the Cu, Cd, and Zn exchangeable fractions assessed by chemical extraction method. Rapeseed was grown for the following 45 days during which physiological parameters, metal uptake transfer rate (TR), bioconcentration factor (BCF), and translocation factor (TF) were measured after harvesting. In the case of plant biomass, no significant difference between applied amendments was observed for the fresh biomass (FBM) and dry biomass (DBM) of shoots and roots of rapeseed. However, BC-2% and BC-HTCG presented the lowest HMs uptake, TR, BCF (BCFroot and BCFshoot), and TF for Cu, Cd, Cr, Ni, Pb, and Zn in rapeseed among the other amendments compared to the unamended Cu -MT. Overall, these findings are indicative that using biochar in combination with RCG and/or HTCG led to a larger reduction in HMs leaching and bioavailability, due to their higher sorption capacity and could be a suitable remediation strategy for heavy metals in a Cu-MT.

Blocher Processed coal gangue Leaching Stabilization Heavy metals concentration Bioavailability

SCI

英语

其他

Key Program for Science and Technology Development of Anhui Province[1804b06020358] ; Key Program for Science and Technology Development of Anhui Province[RSP-2019/8]

Environmental Sciences & Ecology ; Toxicology

Environmental Sciences ; Toxicology

WOS:000514011400059

ACADEMIC PRESS INC ELSEVIER SCIENCE

ENVIRONMENT/ECOLOGY

Web of Science

1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, Peoples R China
3.Middle East Tech Univ, Dept Environm Engn, TR-06800 Ankara, Turkey
4.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Soil & Groundwater Pollut, Shenzhen, Peoples R China
5.Southern Univ Sci & Technol, Sch Environm Sci & Engn, State Environm Protect Key Lab Integrated Surface, Shenzhen, Peoples R China
6.King Saud Univ, Coll Sci, Dept Chem, Bld 5, Riyadh, Saudi Arabia

Munir, Mehr Ahmed Mujtaba,Liu, Guijian,Yousaf, Balal,et al. Contrasting effects of biochar and hydrothermally treated coal gangue on leachability, bioavailability, speciation and accumulation of heavy metals by rapeseed in copper mine tailings[J]. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,2020,191.

Munir, Mehr Ahmed Mujtaba.,Liu, Guijian.,Yousaf, Balal.,Mian, Md Manik.,Ali, Muhammad Ubaid.,...&Naushad, Mu.(2020).Contrasting effects of biochar and hydrothermally treated coal gangue on leachability, bioavailability, speciation and accumulation of heavy metals by rapeseed in copper mine tailings.ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY,191.

Munir, Mehr Ahmed Mujtaba,et al."Contrasting effects of biochar and hydrothermally treated coal gangue on leachability, bioavailability, speciation and accumulation of heavy metals by rapeseed in copper mine tailings".ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 191(2020).