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《Journal of Nanjing Agricultural University》 2016-06
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Silicate adsorbent on absorption of Pb~(2+) and effects of dietary supplement of silicate adsorbent on FFRC strain common carp

JIANG Guangzhen;ZHANG Yongjing;ZHANG Dingdong;LI Xiangfei;LIU Wenbin;College of Animal Science and Technology/Key Laboratory of Aquatic Nutrition of Jiangsu Province,Nanjing Agricultural University;  
[Objectives]This study aimed to evaluate silicate adsorbents on absorption of Pb~(2+)and the effects of dietary supplement of different silicate adsorbents on FFRC strain common carp. [Methods]In vitro,different time( 20,40,60,80,100 and 120 min),pH value( 2,3,4,5,6 and 7) and concentration of Pb~(2+)( 20,50,100 and 200 mg·L~(-1)) were designed to evaluate the absorption activity of montmorillonite,zeolite and attapulgiteclay. In vivo,five isonitrogenous and isolipidic diets were formulated to contain different adsorbents,such as negative control group( plumbum-free),control group( 100 mg·kg~(-1)Pb~(2+)),montmorillonite group( 100 mg·kg~(-1)Pb~(2+)and 5 g·kg~(-1)montmorillonite),zeolite group( 100 mg·kg~(-1)Pb~(2+)and 30 g·kg~(-1)zeolite) and attapulgiteclay group( 100 mg·kg~(-1)Pb~(2+)and 30 g·kg~(-1)attapulgiteclay). 345 fish( initial weight: 22.95 g) were in 15 aquarium tanks and fed 3 times daily for 56 d. [Results]The results showed that adsorption rate of three silicate adsorbents increased by time,concentration of Pb~(2+)and pH value,being the highest in 120 min,pH7.0 and concentration of Pb~(2+)being 50 mg·L-1. No significant difference was found in growth performance of dietary with different silicate adsorbents( P0.05). Deposition of Pb~(2+)on liver and gills of montmorillonite group was not significantly different from negative control group( P0. 05). [Conclusions]Based on the above results,the dietary of silicate adsorbents could adsorb the dietary Pb~(2+)to improve the deposition of Pb~(2+)on tissues of FFRC strain common carp.
【Fund】: 现代农业产业技术体系建设专项(CARS-46-20)
【CateGory Index】: S965.116;S963
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