Shuang He's research while affiliated with Zhejiang University and other places

Publications (7)

Article
Agricultural cropping systems involve the application of high fertilizer rates, which lead to phosphorus (P) losses via surface runoff to the aquatic environment, thereby resulting in severe eutrophication. Here, to evaluate the nutrient loss, we established three monitoring stations in Zhejiang Province, China, in each of which the crop types were...
Article
Modified ceramsite has been widely reported as a P adsorbent in wastewater treatments; however, its performance in removing P from agricultural runoff is unclear. A new low-cost ceramsite is modified in this study applying Zn/Fe-layered double hydroxides (LDHs; CZF) to investigate its practicality in treating P-polluted agricultural runoff. The res...
Article
Full-text available
Background: Rice paddy wetlands may serve as a nutrient source or sink in agricultural ecosystems. However, the pattern of nutrient loss on a watershed scale is not clear. A year-round on-site observation study based on 6-h intervals was conducted. Rainfall, temperature, runoff nutrient concentrations, and adjacent stream water samples were automat...
Article
Full-text available
Purpose Laboratory incubation experiments using ¹⁵N stable isotope labeling and acetylene suppression techniques were conducted to compare the autotrophic nitrification and heterotrophic nitrification rates with the addition of swine manure (SW) and swine-manure-derived biochar (SWB) in two paddy soils. Materials and methods SW and SWB were applie...
Preprint
Full-text available
Background: Rice paddy wetlands may serve as a nutrient source or sink in agricultural ecosystems. However, the pattern of nutrient loss on a watershed scale is not clear. A year-round on-site observation study based on 6-h intervals was conducted. Rainfall, temperature, runoff nutrient concentrations, and adjacent stream water samples were automat...
Preprint
Full-text available
Background Rice paddy wetlands may serve as a nutrient source or sink in agricultural ecosystems. However, the pattern of nutrient loss on a large scale is not clear. A year-round on-site observation study based on 6 h intervals was conducted. Rainfall, temperature, runoff nutrient concentrations, and adjacent stream water samples were automaticall...
Article
Ammonium is strongly related to eutrophication and a key control of eutrophication in aquatic systems, especially in agricultural runoff. In this study, a novel Fe‐Mn binary oxide modified lava (FMML) granular adsorbent was synthesized for ammonium removal from aqueous solutions by co‐precipitation method. The kinetic data was described by pseudo‐s...

Citations

... Phosphorus loss from paddy soils into open waters has been regarded as an important factor for global eutrophication (Zhang et al. 2007). The conventional assessments of P mobility and potential release risk are based on the adsorption/desorption ability (Freundlich or Langmuir) (An and Li 2009) and the quantity of TP leaching, yet showing mixed results (Bradley et al. 2015;Laird et al. 2010;Li et al. 2021a). However, the reported studies neglected the underlying mechanisms of the phenomena observed after biochar addition. ...
... The best conditions of ZnFe-LDH and MnFe 2 O 4 /ZnFe-LDH are as high as 82.49%, 41.25 mg/g at pH = 6 and 97.76%, 48.88 mg/g at pH = 5, respectively. It can be seen from the removal rate that MnFe 2 O 4 /ZnFe-LDH can almost remove phosphate, while ZnFe-LDH still has some reservations, indicating the numerous of positive charge density on the surface of MnFe 2 O 4 /ZnFe-LDH and ZnFe-LDH, and the phosphate mainly exists as H 2 PO 4 − in the acidic conditions ( Fig. S4a), which are conducive to the adsorption of the anion H 2 PO 4 − and have a better removal efficiency (Liu et al. 2021). Under alkaline conditions, a large amount of OH − compete with HPO 4 2− and PO 4 3− for the active sites on the adsorbents are detrimental to the adsorption (Yang et al. 2019). ...
... The normal utilization of chemical fertilizers is 180 kg N hm − 2 and 75 kg P hm − 2 in the rice season. Because the rice growth is mainly in the summer and wet season, the fertilizers applied are to a large extent lost through surface runoff (He et al., 2020). ...
... Most researchers have reported a stimulating effect of biochar on nitrification, as biochar promotes soil microbial activity, nutrient availability, and biochemical function due to its high specific surface area, hydrophilicity, and adsorption capacity [11]. Some researchers have also discovered an inhibitory effect of biochar on nitrification due to surface free radicals, increasing the soil pH, and reducing the bioavailability of NH 4 + -N [12,13]. Ammonia oxidation, catalyzed by ammonia-oxidizing bacteria (AOB) and ammoniaoxidizing archaea (AOA), is the rate-limiting step of autotrophic nitrification [14]. ...