Mn/Al-layered Double Oxide-loaded Biochar Reduced the Toxic Effects of Heavy Metals on Ryegrass in Soil

被引：0

作者：

Lin P.-C. ^{[1
]}

Yin H. ^{[1
,2
,3
]}

Liu X.-F. ^{[1
]}

Liu H. ^{[1
]}

Yan C.-Y. ^{[1
]}

Qi X. ^{[1
]}

机构：

[1] School of Environment and Energy, South China University of Technology, Guangzhou

[2] The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, Guangzhou

[3] Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, Guangzhou

来源：

Huanjing Kexue/Environmental Science | 2023年 / 44卷 / 02期

关键词：

combined pollution of heavy metal; crab shell biochar (BC); e-waste dismantling soil; microbial community analysis; Mn/ Al-layered double oxide; ryegrass;

D O I：

10.13227/j.hjkx.202202219

中图分类号：

学科分类号：

摘要：

The combined pollution of heavy metal Cu and Cd in soil induced by the e-waste dismantling process has become a severe problem. To deal with this issue, crab shell biochar (BC) and Mn/ Al-layered double oxide-loaded crab shell biochar (LDO/ BC) were prepared using coprecipitation and co-pyrolysis of discarded crab shells and manganese aluminum salt. The experimental results showed that not only were the soil pH, available phosphorus, available potassium, and soil enzymatic activity enhanced, but the contents of DTPA-Cu and DTPA-Cd in the soil were also reduced after remediation by BC and LDO/ BC. Microbial community analysis indicated that BC-1% could promote the relative abundance of Gemmatimonadota and Acidobacteriota; meanwhile, LDO/ BC-1% could promote the relative abundance of Proteobacteria, which could reduce the accumulation of Cd in plants. Ryegrass was planted for further investigating the toxic effect of heavy metals in soil after remediation. The results demonstrated that after remediating with BC-5% and LDO/ BC-1%, ryegrass grew more vigorously and with a lower content of the heavy metals Cu and Cd in the plants than that of CK, and the germination rate increased by 29% and 60%, respectively. Further, LDO/ BC-1% had a more excellent remediation performance than that of the other groups, and the Mn in LDO/ BC could reduce the content of heavy metal Cd adsorbed by ryegrass in soil. © 2023 Science Press. All rights reserved.

引用

页码：975 / 983

页数：8

共 47 条

[1] Arya S, Rautela R, Chavan D, Et al., Evaluation of soil contamination due to crude E-waste recycling activities in the capital city of India, Process Safety and Environmental Protection, 152, pp. 641-653, (2021)
[2] Han W, Gao G H, Geng J Y, Et al., Ecological and health risks assessment and spatial distribution of residual heavy metals in the soil of an e-waste circular economy park in Tianjin, China, Chemosphere, 197, pp. 325-335, (2018)
[3] Moeckel C, Breivik K, N∅st T H, Et al., Soil pollution at a major west African E-waste recycling site: contamination pathways and implications for potential mitigation strategies, Environment International, 137, (2020)
[4] Houessionon M G K, Ouendo E M D, Bouland C, Et al., Environmental heavy metal contamination from electronic waste (E-waste) recycling activities worldwide: a systematic review from 2005 to 2017 [J], International Journal of Environmental Research and Public Health, 18, 7, (2021)
[5] Mushtaq M, Bhatti H N, Iqbal M, Et al., Eriobotrya japonica seed biocomposite efficiency for copper adsorption: isotherms, kinetics, thermodynamic and desorption studies, Journal of Environmental Management, 176, pp. 21-33, (2016)
[6] Soetrisno F N, Delgado-Saborit J M., Chronic exposure to heavy metals from informal e-waste recycling plants and children's attention, executive function and academic performance [J], Science of the Total Environment, 717, (2020)
[7] Amphalop N, Suwantarat N, Prueksasit T, Et al., Ecological risk assessment of arsenic, cadmium, copper, and lead contamination in soil in e-waste separating household area, Buriram Province, Thailand, Environmental Science and Pollution Research, 27, 35, pp. 44396-44411, (2020)
[8] Huang R, Li Y Q, Li F, Et al., Phosphate fertilizers facilitated the Cd contaminated soil remediation by sepiolite: Cd mobilization, plant toxicity, and soil microbial community, Ecotoxicology and Environmental Safety, 234, (2022)
[9] Nguyen T H, Won S, Ha M G, Et al., Bioleaching for environmental remediation of toxic metals and metalloids: a review on soils, sediments, and mine tailings, Chemosphere, 282, (2021)
[10] Wang Y H, Lin S H, Juang R S., Removal of heavy metal ions from aqueous solutions using various low-cost adsorbents, Journal of Hazardous Materials, 102, 2-3, pp. 291-302, (2003)

← 1 2 3 4 5 →