In situ synthesis of micro-plastics embedded sewage-sludge co-pyrolyzed biochar: Implications for the remediation of Cr and Pb availability and enzymatic activities from the contaminated soil

Mujtaba Munir，Mehr Ahmed1; Yousaf，Balal2; Ali，Muhammad Ubaid3; Dan，Chen1; Abbas，Qumber2; Arif，Muhammad4,5; Yang，Xiaoe1

2021-06-15

10.1016/j.jclepro.2021.127005

Journal of Cleaner Production   影响因子和分区

0959-6526

Careful designing of biochar (BC) employing biological and industrial waste materials has gained much attention to improve soil health via reducing the bioavailability of heavy metals (HMs) in the contaminated-soil. Herein, a forty-day pot experiment was conducted to explore the influence of micro-plastic (MP) embedded sewage-sludge (SS). The effects of SS and MP dosage ratios (0–15%) on the physicochemical properties of the modified-biochars were also studied with slow-pyrolyzed (SBC-500 °C) and flash-pyrolyzed biochar (FSBC-700 °C). Our investigations found remarkable positive synergistic effects for the SBC-15% involving increased soil pH, CEC, high carbon contents, and alleviation in Cr and Pb leaching than control and FSBC-700 °C. Besides, SBC-15% containing high carbon functional groups can effectively mitigate the Cr and Pb availability stress by intensifying the adsorption or passivation in the amended-soil, thereby, significantly reducing the Cr and Pb EDTA-extractable contents. Chemical fractionation analyses further confirmed that SBC-15% addition was more helpful for Cr and Pb immobilization and ultimately reducing transfer-rate, bioconcentration-factor, and translocation-factor as compared to FSBC-15% and control due to its higher alkalinity, surface area/porosity, and available carbon functional groups. The maize biomass (root and shoot) increased by more than 50%, and the activities of soil enzymes such as urease, alkaline phosphatase, and glucosidase enzyme activities were also enhanced. This ecologically feasible strategy would pave an efficient way to make full use of the SS and MP for the biochar synthesis with excellent soil remediation performance.

Heavy metals Microplastic Modified-biochar Spectroscopic investigation

SCI ; EI

英语

其他

WOS:000647766700017

20211610223371

Alkalinity ; Biochemistry ; Carbon ; Chemical analysis ; Phosphatases ; Physicochemical properties ; Remediation ; Sewage sludge ; Soil conservation ; Soil pollution ; Soils

Sewage Treatment:452.2 ; Environmental Impact and Protection:454.2 ; Soils and Soil Mechanics:483.1 ; Metallurgy and Metallography:531 ; Chemistry, General:801.1 ; Biochemistry:801.2 ; Physical Chemistry:801.4 ; Chemical Products Generally:804

2-s2.0-85104104175

Scopus

1.Ministry of Education (MOE) Key Laboratory of Environmental Remediation and Ecosystem Health,College of Environmental and Resources Science,Zhejiang University,Institute of Crop Science and Zhejiang Key Laboratory of Crop Germplasm,Zhejiang University,Hangzhou,310058,China
2.Environmental Engineering Department,Middle East Technical University,Ankara,06800,Turkey
3.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,And State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518000,China
4.CAS Key Laboratory of Crust-Mantle Materials and Environment,School of Earth and Space Sciences,University of Science and Technology of China,Hefei,230026,China
5.State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,The Chinese Academy of Sciences,Xi'an,710075,China

Mujtaba Munir，Mehr Ahmed,Yousaf，Balal,Ali，Muhammad Ubaid,et al. In situ synthesis of micro-plastics embedded sewage-sludge co-pyrolyzed biochar: Implications for the remediation of Cr and Pb availability and enzymatic activities from the contaminated soil[J]. Journal of Cleaner Production,2021,302.

Mujtaba Munir，Mehr Ahmed.,Yousaf，Balal.,Ali，Muhammad Ubaid.,Dan，Chen.,Abbas，Qumber.,...&Yang，Xiaoe.(2021).In situ synthesis of micro-plastics embedded sewage-sludge co-pyrolyzed biochar: Implications for the remediation of Cr and Pb availability and enzymatic activities from the contaminated soil.Journal of Cleaner Production,302.

Mujtaba Munir，Mehr Ahmed,et al."In situ synthesis of micro-plastics embedded sewage-sludge co-pyrolyzed biochar: Implications for the remediation of Cr and Pb availability and enzymatic activities from the contaminated soil".Journal of Cleaner Production 302(2021).