Next Article in Journal
A Comment on Chinese Policies to Avoid Negative Impacts on River Ecosystems by Hydropower Projects
Previous Article in Journal
Evaluating the Efficacy of Point-of-Use Water Treatment Systems Using the Water Quality Index in Rural Southwest China
Previous Article in Special Issue
Metallic Pollution and the Use of Antioxidant Enzymes as Biomarkers in Bellamya unicolor (Olivier, 1804) (Gastropoda: Bellamyinae)
Open AccessArticle

Amendment of Husk Biochar on Accumulation and Chemical Form of Cadmium in Lettuce and Pak-Choi Grown in Contaminated Soil

1
Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung 40227, Taiwan
2
Department of Agronomy, National Taiwan University, Taipei 10617, Taiwan
3
Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 40227, Taiwan
*
Author to whom correspondence should be addressed.
Water 2020, 12(3), 868; https://doi.org/10.3390/w12030868
Received: 11 February 2020 / Revised: 16 March 2020 / Accepted: 18 March 2020 / Published: 20 March 2020
(1) Background: Cadmium (Cd) accumulated in vegetables not only affects their growth but can also enter the human body via food chains and lead to various illnesses. Plants can decrease the toxicity by changing the chemical forms of Cd, which include inorganic (FE), water-soluble (FW), pectate- and protein-integrated (FNaCl), undissolved phosphate (FHAc), oxalate (FHCl), and residual forms (FR). Among them, FE and FW chemical forms show higher mobility to translocate upward from roots to shoots compared with the others. (2) Methods: Different varieties or cultivars of lettuce and pak-choi were grown in Cd-contaminated soils amended with husk biochar (BC) to replenish nitrogen to the recommended amount and also to raise the soil pH value. (3) Results: More than 73% of the accumulated Cd in the edible organs was compartmentalized in FE chemical form in both leafy vegetables regardless of treatments. In comparison with control, the application of BC decreased the Cd concentrations and bioconcentration factors in the roots and shoots of two leafy vegetables at different growth periods in general. The chemical form and bioaccessible fraction of Cd in the edible blanching tissues were used to calculate the risk of oral intake. The vegetable-induced hazard quotients of lettuce and pak-choi were acceptable, except for pak-choi grown in control without applying BC. View Full-Text
Keywords: bioaccessibility; cadmium; chemical form; husk biochar; risk assessment bioaccessibility; cadmium; chemical form; husk biochar; risk assessment
Show Figures

Figure 1

MDPI and ACS Style

Chen, K.-S.; Pai, C.-Y.; Lai, H.-Y. Amendment of Husk Biochar on Accumulation and Chemical Form of Cadmium in Lettuce and Pak-Choi Grown in Contaminated Soil. Water 2020, 12, 868.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop