Preparation of olive pomace soil amendment and its application in heavy metal contaminated soil remediation

ZHU Kunyao; LI Mingyu; LI Fusong; WANG Shengxu; LI Luoyu; CAO Yuzhuo; WANG Junqiang

doi:10.16152/j.cnki.xdxbzr.2026-01-003

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Preparation of olive pomace soil amendment and its application in heavy metal contaminated soil remediation

更新时间：2026-02-24

- Preparation of olive pomace soil amendment and its application in heavy metal contaminated soil remediation
- Journal of Northwest University (Natural Science Edition) Vol. 56, Issue 1, Pages: 25-34(2026)
- 作者机构：
  
  1.西北大学　榆林碳中和学院，陕西　西安　710069
  2.西北大学　城市与环境学院，陕西　西安　710127
  3.陕西省地表系统与环境承载力重点实验室，陕西　西安　710127
- 作者简介：
- 基金信息：
- DOI：10.16152/j.cnki.xdxbzr.2026-01-003
  CLC： X712
- Received：02 November 2025，
  
  Revised：2025-12-09，
  
  Published：25 February 2026
- 稿件说明：
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ZHU Kunyao, LI Mingyu, LI Fusong, et al. Preparation of olive pomace soil amendment and its application in heavy metal contaminated soil remediation[J]. Journal of Northwest University (Natural Science Edition), 2026, 56(1): 25-34.
DOI：

ZHU Kunyao, LI Mingyu, LI Fusong, et al. Preparation of olive pomace soil amendment and its application in heavy metal contaminated soil remediation[J]. Journal of Northwest University (Natural Science Edition), 2026, 56(1): 25-34. DOI： 10.16152/j.cnki.xdxbzr.2026-01-003.

摘要

油橄榄果渣是橄榄油榨取过程中产生的固体副产物。由于油橄榄果渣富含丰富的纤维素、半纤维素及木质素等难降解物质，从而限制了其资源化利用。微生物堆肥是我国农业废弃物处理的主要方式。然而，目前针对油橄榄果渣木质素和纤维素降解的微生物研究较少，使得油橄榄果渣的高效利用成为一大难题。基于此，本研究通过降解实验获取了2株油橄榄果渣纤维素和木质素的高效降解功能菌X4-1（肠杆菌属

Enterobacter sp

）和M7-2（热带假丝酵母菌

Candida tropicalis

）。将上述2种菌株用于油橄榄果渣发酵过程，制备得到了满足农业土壤肥料施用标准的有机肥。同时考察了接种重金属固定化菌剂后的有机改良剂对土壤重金属修复、作物生长及重金属富集效果的影响。研究结果表明，油橄榄果渣有机改良剂促进了青菜生长，提高了生物量。向Pb、Cu和Cd污染土壤中施加有机改良剂后，青菜株高、鲜重和干重分别增加了4.80%~15.78%、10.02%~129.85%和7.70%~120.41%。此外，有机改良剂的施用有效降低了土壤重金属的生态风险，抑制了青菜对重金属的富集作用。相比于未施肥处理，施用有机改良剂后生长于重金属污染土壤的青菜地下部Cu和Cd含量分别降低了85.47%和34.10%，地上部含量分别降低了42.56%和54.68%。研究结果可为油橄榄果渣的资源化利用及重金属污染农田土壤绿色修复提供参考。

Abstract

Olive pomace is a solid by-product of the olive oil extraction process. It is rich in difficult-to-biodegrade substances such as cellulose

hemicellulose

and lignin

thus limiting the resource utilization of olive pomace. Microbial composting is the main way of agricultural waste treatment in China. However

there are few studies on the microbial degradation of lignin and cellulose in olive pomace

which makes the efficient utilization of olive pomace a major problem. Based on this

in this study

two strains of high-efficiency degrading functional bacteria X4-1(

Enterobacter sp

) and M7-2(

Candida tropicalis

) of olive pomace cellulose and lignin were obtained through degradation experiments. The above two strains were used in the fermentation process of olive pomace to prepare organic fertilizers that met the application standards of agricultural soil fertilizers. Meanwhile

the effects of organic soil amendment inoculated with heavy metal immobilized bacteria on soil heavy metal remediation

crop growth

and heavy metal enrichment were investigated. The results showed that olive pomace orga

nic amendment promoted the growth of

Brassica chinensis

and increased biomass. After applying organic amendment to Pb

and Cd contaminated soil

the plant height

fresh weight and dry weight of

Brassica chinensis

increased by 4.80%~15.78%

10.02%~129.85%

and 7.70%~120.41%

respectively. In addition

the application of organic amendment effectively reduced the ecological risk of heavy metals in the soil and inhibited the enrichment of heavy metals by

Brassica chinensis

. Compared with no fertilization treatment

organic amendment reduced the contents of Cu and Cd in the underground part of

Brassica chinensis

grown in heavy metal contaminated soil by 85.47% and 34.10%

respectively; and the contents of aboveground part decreased by 42.56% and 54.68%

respectively. The results of the study can provide a reference for the resource utilization of olive pomace and the green remediation of heavy metal contaminated agricultural soils.

关键词

Keywords

references

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