问题描述：
英语翻译成中文，不要工具翻译，专业名词及缩写可以不用翻译，求大神
Suzhou creek is a typical tidal river in Shanghai, China. Due to past industrial activities, sediment is heavily contaminated with metal cations, mainly Pb2+, Cd2+, Zn2+, Ni2+ and Cu2+. The contaminants
of Suzhou creek mainly existed in the middle reach and all of the samples investigated in this study were taken fromit. The total concentration of Pb2+, Zn2+, Cu2+, Cd2+ and Ni2+ in sediment sample was 2647mgkg−1, 2053.4mgkg−1, 246mgkg−1, 23.4mgkg−1 and 217.8mgkg−1, respectively.
All solutions were prepared with ultrapure DI water and reagent-grade chemicals. All filterswere polycarbonate unless otherwise stated. Three replicates of all batch equilibrations were conducted to estimate variability. The amount with 600-g (dry wt) samples of field-moist sediment was placed in 2 L batch reactors. Considering the high contamination of Pb and Zn in sediment and according to previously fundamental study on the adsorption capacity of apatite and ferrihydrite, we choose 5% as dosage
rate in our study. Three proportions of immobilizing additives were added to each reactor, 5 wt% apatite, 5wt% ferrihydrite, 5wt% apatite+5wt% ferrihydrite.
Suzhou creek is a typical tidal river in Shanghai, China. Due to past industrial activities, sediment is heavily contaminated with metal cations, mainly Pb2+, Cd2+, Zn2+, Ni2+ and Cu2+. The contaminants
of Suzhou creek mainly existed in the middle reach and all of the samples investigated in this study were taken fromit. The total concentration of Pb2+, Zn2+, Cu2+, Cd2+ and Ni2+ in sediment sample was 2647mgkg−1, 2053.4mgkg−1, 246mgkg−1, 23.4mgkg−1 and 217.8mgkg−1, respectively.
All solutions were prepared with ultrapure DI water and reagent-grade chemicals. All filterswere polycarbonate unless otherwise stated. Three replicates of all batch equilibrations were conducted to estimate variability. The amount with 600-g (dry wt) samples of field-moist sediment was placed in 2 L batch reactors. Considering the high contamination of Pb and Zn in sediment and according to previously fundamental study on the adsorption capacity of apatite and ferrihydrite, we choose 5% as dosage
rate in our study. Three proportions of immobilizing additives were added to each reactor, 5 wt% apatite, 5wt% ferrihydrite, 5wt% apatite+5wt% ferrihydrite.
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