Effects of silkworm excrement and water management on the accumulation of Cd and As in different varieties of rice and an assessment of their health risk

Rice (Oryza sativa L.) consumption represents a major route for the exposure to cadmium (Cd) and arsenic (As) in many countries. Two varieties of rice that were grown in soils contaminated with Cd and As were evaluated for the accumulation of these toxins in rice grains and the risks of exposure of...

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Autores principales:	Tingting Li, Huirong Zhou, Junhui Zhang, Zengyu Zhang, Yuefeng Yu, Yanyan Wei, Junming Hu
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Cadmium Arsenic Silkworm excrement Water management Rice variety Environmental pollution TD172-193.5 Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/655f0af73dc841d991949d47f176fcf1
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spelling	oai:doaj.org-article:655f0af73dc841d991949d47f176fcf12021-11-14T04:28:22ZEffects of silkworm excrement and water management on the accumulation of Cd and As in different varieties of rice and an assessment of their health risk0147-651310.1016/j.ecoenv.2021.112974https://doaj.org/article/655f0af73dc841d991949d47f176fcf12021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0147651321010861https://doaj.org/toc/0147-6513Rice (Oryza sativa L.) consumption represents a major route for the exposure to cadmium (Cd) and arsenic (As) in many countries. Two varieties of rice that were grown in soils contaminated with Cd and As were evaluated for the accumulation of these toxins in rice grains and the risks of exposure of local residents to Cd and As when treated with different amounts of silkworm excrement and types of water management. Silkworm excrement, water management and the variety of rice significantly affected the accumulation of Cd and As in rice. The combination of multiple measures can be more effective at reducing heavy metals than the use of single measure, i.e., silkworm excrement management, water management, and the selection of low accumulation variety. The use of a variety that accumulates low amounts of Cd combined with 1% silkworm excrement management can effectively increase the soil pH and electrical conductivity (EC) and decrease the contents of soil available Cd and the transfer coefficients of Cd in rice, subsequently reducing the concentrations of Cd in rice grains and lowering the health risks of the intake of Cd. Similarly, the use of a conventional rice variety combined with alternating periods of drying and wetting in the three weeks before and after the heading stage decreased the contents of soil available As and the transfer coefficient of As in rice, subsequently reducing the accumulation of As in the grains and lowering the health risk of the intake of As. The significantly lower concentrations of Cd and As in rice grains and the risk of intake of Cd and As from rice was observed using a conventional rice variety combined with alternating drying-wetting in the three weeks before and after the heading stage and 1% silkworm excrement management. Thus, the combination of multiple measures in the coexistence of Cd and As in contaminated soils can be a promising strategy to avoid serious health risks and ensure the safety of food for local residents.Tingting LiHuirong ZhouJunhui ZhangZengyu ZhangYuefeng YuYanyan WeiJunming HuElsevierarticleCadmiumArsenicSilkworm excrementWater managementRice varietyEnvironmental pollutionTD172-193.5Environmental sciencesGE1-350ENEcotoxicology and Environmental Safety, Vol 228, Iss , Pp 112974- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Cadmium Arsenic Silkworm excrement Water management Rice variety Environmental pollution TD172-193.5 Environmental sciences GE1-350
spellingShingle	Cadmium Arsenic Silkworm excrement Water management Rice variety Environmental pollution TD172-193.5 Environmental sciences GE1-350 Tingting Li Huirong Zhou Junhui Zhang Zengyu Zhang Yuefeng Yu Yanyan Wei Junming Hu Effects of silkworm excrement and water management on the accumulation of Cd and As in different varieties of rice and an assessment of their health risk
description	Rice (Oryza sativa L.) consumption represents a major route for the exposure to cadmium (Cd) and arsenic (As) in many countries. Two varieties of rice that were grown in soils contaminated with Cd and As were evaluated for the accumulation of these toxins in rice grains and the risks of exposure of local residents to Cd and As when treated with different amounts of silkworm excrement and types of water management. Silkworm excrement, water management and the variety of rice significantly affected the accumulation of Cd and As in rice. The combination of multiple measures can be more effective at reducing heavy metals than the use of single measure, i.e., silkworm excrement management, water management, and the selection of low accumulation variety. The use of a variety that accumulates low amounts of Cd combined with 1% silkworm excrement management can effectively increase the soil pH and electrical conductivity (EC) and decrease the contents of soil available Cd and the transfer coefficients of Cd in rice, subsequently reducing the concentrations of Cd in rice grains and lowering the health risks of the intake of Cd. Similarly, the use of a conventional rice variety combined with alternating periods of drying and wetting in the three weeks before and after the heading stage decreased the contents of soil available As and the transfer coefficient of As in rice, subsequently reducing the accumulation of As in the grains and lowering the health risk of the intake of As. The significantly lower concentrations of Cd and As in rice grains and the risk of intake of Cd and As from rice was observed using a conventional rice variety combined with alternating drying-wetting in the three weeks before and after the heading stage and 1% silkworm excrement management. Thus, the combination of multiple measures in the coexistence of Cd and As in contaminated soils can be a promising strategy to avoid serious health risks and ensure the safety of food for local residents.
format	article
author	Tingting Li Huirong Zhou Junhui Zhang Zengyu Zhang Yuefeng Yu Yanyan Wei Junming Hu
author_facet	Tingting Li Huirong Zhou Junhui Zhang Zengyu Zhang Yuefeng Yu Yanyan Wei Junming Hu
author_sort	Tingting Li
title	Effects of silkworm excrement and water management on the accumulation of Cd and As in different varieties of rice and an assessment of their health risk
title_short	Effects of silkworm excrement and water management on the accumulation of Cd and As in different varieties of rice and an assessment of their health risk
title_full	Effects of silkworm excrement and water management on the accumulation of Cd and As in different varieties of rice and an assessment of their health risk
title_fullStr	Effects of silkworm excrement and water management on the accumulation of Cd and As in different varieties of rice and an assessment of their health risk
title_full_unstemmed	Effects of silkworm excrement and water management on the accumulation of Cd and As in different varieties of rice and an assessment of their health risk
title_sort	effects of silkworm excrement and water management on the accumulation of cd and as in different varieties of rice and an assessment of their health risk
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/655f0af73dc841d991949d47f176fcf1
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Effects of silkworm excrement and water management on the accumulation of Cd and As in different varieties of rice and an assessment of their health risk

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