这项研究分析了来自三大洲六个国家的水产养殖中十种广泛使用的商业鱼饲料,以评估微塑料(MP)污染。在水产养殖饲料中发现MPs的平均丰度为1130±259.07颗粒/kg,平均长度为2.64±0.62mm(±SE),纤维(85%)和碎片(15%)。这些议员中的大多数是黑人。样本中议员的丰度各不相同,饲料SP最高(26%),其次是IF,GA,ELS,NT,电子战,TB,GR,VR,HCF最少(3%)。确定的聚合物由聚对苯二甲酸乙二醇酯(PET,20%),聚酰胺(PA,30%),聚甲基丙烯酸甲酯(PMMA),聚氨酯(PU),聚苯乙烯(PS)各15%,和聚丙烯(PP,5%)。纤维的SEM-EDX分析显示薄片,裂缝,坑和重金属镍的存在,Cu,Zn,Cr,Au,Hg,Cd,Ti,和Pb。此外,一些碎片含有Nb(铌)和天然元素。计算了十种进料中聚合物的聚合物危害指数(PHI),9个处于高度危险类别(IV和V),PHI值范围为400-394825。这项工作展示了鱼类饲料中国会议员的重要性,并倡导采取控制措施以减少鱼类饲料中的国会议员,以实现可持续的水产养殖生产。
This study analysed ten widely used commercial fishfeeds in aquaculture from six countries spanning three continents to assess microplastic (MP) contamination. MPs with an average abundance of 1130 ± 259.07 particles/kg and an average length of 2.64 ± 0.62 mm ( ± SE) were found in aquaculture feeds, with fibres (85 %) and fragments (15 %). The majority of these MPs were black. The abundance of MPs varied among the samples, with the highest in feed SP (26 %), followed by IF, GA, ELS, NT, EW, TB, GR, VR, and the least in HCF (3 %). Polymers identified consisted of Polyethylene terephthalates (PET, 20 %), Polyamide (PA, 30 %), Polymethyl methacrylate (PMMA), Polyurethane (PU), and Polystyrene (PS) with 15 % each, and Polypropylene (PP, 5 %). SEM-EDX analysis of fibres showed flakes, cracks, and pits and the presence of heavy metals Ni, Cu, Zn, Cr, Au, Hg, Cd, Ti, and Pb. Additionally, some fragments contained Nb (Niobium) alongside the naturally occurring elements. The Polymer Hazard Index (PHI) for the polymers in ten feeds was calculated, and nine were in the highly hazardous category (IV and V) with PHI values ranging from 400-394825. The work showcases the graveness of MPs in fishfeeds and advocates control measures to curtail MPs in fishfeeds for sustainable aquaculture production.