Animal carcass- and wood-derived biochars improved nutrient bioavailability, enzyme activity, and plant growth in metal-phthalic acid ester co-contaminated soils: A trial for reclamation and improvement of degraded soils

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:261

Article

Chen, Hanbo¹  Yang, Xing^1,2  Wang, Hailong^1,3  Sarkar, Binoy⁴  Shaheen, Sabry M.^2,5,6  Gielen, Gerty⁷  Bolan, Nanthi⁸  Guo, Jia⁹  Che, Lei¹⁰  Sun, Huili¹¹  Rinklebe, Joerg^2,12 

[1] Foshan Univ, Biochar Engn Technol Res Ctr Guangdong Prov, Sch Environm & Chem Engn, Foshan 528000, Guangdong, Peoples R China

[2] Univ Wuppertal, Inst Fdn Engn Water & Waste Management, Sch Architecture & Civil Engn, Lab Soil & Groundwater Management, Pauluskirchstr 7, D-42285 Wuppertal, Germany

[3] Zhejiang A&F Univ, Key Lab Soil Contaminat Bioremediat Zhejiang Prov, Hangzhou 311300, Zhejiang, Peoples R China

[4] Univ Lancaster, Lancaster Environm Ctr, Lancaster LA1 4YQ, England

[5] King Abdulaziz Univ, Fac Meteorol Environm & Arid Land Agr, Dept Arid Land Agr, Jeddah 21589, Saudi Arabia

[6] Univ Kafrelsheikh, Fac Agr, Dept Soil & Water Sci, Kafr Al Sheikh 33516, Egypt

[7] Scion, Private Bag 3020, Rotorua 3046, New Zealand

[8] Univ Newcastle, Global Ctr Environm Remediat, Newcastle, NSW 2308, Australia

[9] Chengbang Ecoenvironm Co Ltd, Hangzhou 310008, Zhejiang, Peoples R China

[10] Huzhou Univ, Sch Engn, Huzhou 313000, Zhejiang, Peoples R China

[11] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marine Bioresources Sustainable Utilizat, Guangzhou 510301, Guangdong, Peoples R China

[12] Univ Sejong, Dept Environm Energy & Geoinformat, 98 Gunja Dong, Seoul, South Korea

关键词: Degraded land;    Nutrients availability;    Charcoal;    Soil biology;    Soil restoration;   

DOI  :  10.1016/j.jenvman.2020.110246

来源: Elsevier

【 摘 要 】

Reclamation of degraded soils such as those with low organic carbon content and soils co-contaminated with toxic elements and phthalic acid esters (PAEs) is of great concern. Little is known about the efficiency of plantand animal-derived biochars for improving plant growth and physicochemical and biological properties of co-contaminated soils, particularly under low content of organic matter. Hence, a pot trial was carried out by growing pak choi (Brassica chinensis L.) to assess the influence of different doses (0, 0.5, 1, 2, and 4%) of animal (pig carcass) and wood (Platanus orientalis) derived biochars on soil properties, nutrient availabilities, plant growth, and soil enzyme activities in two soils containing low (LOC) and high (HOC) organic carbon contents and co-contaminated with di-(2-ethylhexyl) phthalic acid (DEHP) and cadmium (Cd). Biochar applications improved pH, salinity, carbon content, and cation exchange capacity of both soils. Addition of biochars significantly increased the bioavailability and uptake of phosphorus and potassium in the plants in both soils with greater effects from pig biochar than wood biochar. Biochar additions also significantly enhanced urease, sucrase, and catalase activities, but suppressed acid phosphatase activity in both soils. The impact of pig biochar was stronger on urease and acid phosphatase, while the wood biochar was more effective with sucrase and catalase activities. The biomass yield of pak choi was significantly increased after biochar addition to both soils, especially in 2% pig biochar treatment in the LOC soil. The positive response of soil enzymes activities and plant growth for biochar addition to the Cd and DEHP co-contaminated soils indicate that both biochars, particularly the pig biochar can mitigate the risk of these pollutants and prove to be eco-friendly and low-cost amendments for reclaiming these degraded soils.

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