Earthworms increase the potential for enzymatic bio-activation of biochars made from co-pyrolyzing animal manures and plastic wastes

JOURNAL OF HAZARDOUS MATERIALS

卷:408

Article

Sanchez-Hernandez, Juan C.¹  Ro, Kyoung S.²  Szogi, Ariel A.²  Chang, Sechin³  Park, Bosoon⁴ 

[1] Univ Castilla La Mancha, Inst Environm Sci, Lab Ecotoxicol, Toledo 45071, Spain

[2] ARS, Coastal Plains Soil Water & Plant Res Ctr, USDA, 2611 West Lucas St, Florence, SC 29501 USA

[3] ARS, Souther Reg Res Ctr, USDA, 1100 Robert E Lee Blvd, New Orleans, LA 70124 USA

[4] Natl Poultry Res Ctr, Qual & Safety Assessment Res Unit, 950 Coll Stn Rd, Athens, GA 30605 USA

关键词: Biochar;    Plastic wastes;    Plastichar;    Carboxylesterases;    Lumbricus terrestris;   

DOI  :  10.1016/j.jhazmat.2020.124405

来源: Elsevier

【 摘 要 】

We assessed the enzymatic activation of four different biochars produced from pyrolyzing swine manure and poultry litter, and by co-pyrolyzing these livestock residues with agricultural spent mulch plastic film wastes (plastichars). Enzymatic activation consisted of incubating biochars in soil inoculated with earthworms (Lumbricus terrestris), which acted as biological vectors to facilitate retention of extracellular enzymes onto biochar surface. The activity of carboxylesterase-a pesticide-detoxifying enzymewas measured in non-bioturbed soils (reference), linings of the burrows created by earthworms, casts (feces) and biochar particles recovered from the soil. Our results revealed that: 1) biochar increased soil carboxylesterase activity respect to biochar-free (control) soils, which was more prominent in the presence of earthworms. 2) The maximum enzyme activity was found in soils amended with plastichars. 3) The plastichars showed higher enzyme binding capacities than that of the biochars produced from animal manure alone, corroborating the pattern of enzyme distribution found in soil. 4) The presence of earthworms in soil significantly increased the potential of the plastichars for enzymatic activation. These findings suggest that the plastichars are suitable for increasing and stabilizing soil enzyme activities with no toxicity on earthworms.

【 授权许可】

Free