Cadmium and lead bioavailability to poultry fed with contaminated soil-spiked feed

Liping Li; Yongxin Cao; James A Ippolito; Weiqin Xing; Kunyan Qiu; Hongbo Li; Di Zhao; Yali Wang; Yale Wang

doi:10.1016/j.scitotenv.2023.163036

Cadmium and lead bioavailability to poultry fed with contaminated soil-spiked feed

Sci Total Environ. 2023 Jun 25:879:163036. doi: 10.1016/j.scitotenv.2023.163036. Epub 2023 Mar 25.

Authors

Liping Li¹, Yongxin Cao², James A Ippolito³, Weiqin Xing², Kunyan Qiu⁴, Hongbo Li⁵, Di Zhao⁶, Yali Wang², Yale Wang²

Affiliations

¹ School of the Environment, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan 450001, China. Electronic address: lilp@haut.edu.cn.
² School of the Environment, Henan University of Technology, Zhengzhou, Henan 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan 450001, China.
³ Department of Soil and Crop Sciences, Colorado State University, Fort Collins, CO 80523-1170, USA; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan 450001, China.
⁴ Jiyuan Ecological and Environmental Monitoring Center of Henan Province, Jiyuan, Henan 459000, China.
⁵ State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, China.
⁶ College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing, Jiangsu 210095, China.

PMID: 36972887
DOI: 10.1016/j.scitotenv.2023.163036

Abstract

Geophagy is common for free-range chickens, however, the relative bioavailability (RBA) of heavy metals in contaminated soils consumed by chickens has not fully investigated. In this work, chickens were fed diets increasingly spiked with a contaminated soil (Cd = 105, Pb = 4840 mg kg^-1; 3, 5, 10, 20 and 30 % of overall feed by weight), or Cd/Pb reagent spikes (from CdCl₂ or Pb(Ac)₂), for 23 d. After the study period, chicken liver, kidney, femur and gizzard samples were analyzed for Cd and Pb concentrations, and organ/tissue metal concentrations were used to calculate Cd and Pb RBA. Linear dose response curves (DRCs) were established for both Cd/Pb reagents-spiked and soil-spiked treatments. Femur Cd concentrations of soil-spiked treatments were two times of Cd-spiked treatments with similar feed Cd levels, while feed spiked with Cd or Pb also resulted in elevated Pb or Cd concentrations in some organ/tissues. Metal RBA was calculated using three different methods. Most Cd and Pb RBA values were in the range 50-70 %, with the chicken gizzard as a potential endpoint for bioaccessible Cd and Pb. Cadmium and Pb bioavailability values can help with more precise estimation of Cd and Pb accumulation in chicken following heavy metal-contaminated soil ingestion, with overall results helping to protect human health.

Keywords: Chicken; Gizzard; Heavy metal; Method; RBA.

MeSH terms

Animals
Biological Availability
Cadmium / analysis
Chickens
Humans
Lead
Metals, Heavy* / analysis
Poultry
Soil
Soil Pollutants* / analysis

Substances

Cadmium
Lead
Soil Pollutants
Metals, Heavy
Soil