Performance of physical and chemical methods in the co-reduction of internal phosphorus and nitrogen loading from the sediment of a black odorous river

Yin, Hongbin; Wang, Jingfu; Zhang, Runyu; Tang, Wanying

doi:10.1016/j.scitotenv.2019.01.326

Cited by 74 publications

(16 citation statements)

References 44 publications

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“…Eutrophication of water bodies, both natural and artificial, is spreading globally, causing such serious consequences as Harmful Algal Blooms (HABs) [1] and/or black odorous water [2]. These nuisance phenomena pose serious threats to the aquatic ecosystem, to the environment, and to public health [3].…”

Section: Introductionmentioning

confidence: 99%

Exploring a multifunctional geoengineering material for eutrophication remediation: Simultaneously control internal nutrient load and tackle hypoxia

Zhang

Lyu

Liu

et al. 2021

Chemical Engineering Journal

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An effective approach for control of internal nutrient loading and sediment hypoxia remains a longstanding challenge to the restoration of aquatic ecosystems. In order to simultaneously tackle these issues, a MultiFunction Geoengineering material (MFG) was developed for sediment remediation through the synergistic functions of physical capping, nutrient adsorption and delivery of O2 nanobubbles. The MFG, derived from natural zeolite, exhibited superior (1.5-4 times higher) adsorption capabilities for both phosphate (PO4 3--P) and ammonium (NH4 + -N), than pristine zeolite. The O2 adsorption capacity was also enhanced from 46, observed in the natural zeolite, to 121 mg O2/g for the MFG. An in-situ sediment capping experiment in a eutrophic lake demonstrated that the application of MFG dramatically reversed sediment hypoxia (ORP -200 mV) to an aerobic status (ORP 175 mV) and, furthermore, stimulated sediment microbial activity, particularly nitrifying bacteria. The MFG treatment resulted the sediment changing from a nutrient source to a sink through decreasing the cumulative PO4 3--P and NH4 + -N fluxes from the sediment by 124.6% and 131.1%, respectively. Moreover, the comprehensive functionalities of the material have been, for the first time, quantified, from which data O2 nanobubble delivery was determined to be the largest contributor, reducing the fluxes of PO4 3--P and NH4 + -N by 57.3% and 56.1% of, respectively. Our findings highlight the viability of such multifunctional material for the remediation of internal nutrient loads in lacustrine environments, towards sustainable eutrophication control.

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Section: Introductionmentioning

confidence: 99%

Exploring a multifunctional geoengineering material for eutrophication remediation: Simultaneously control internal nutrient load and tackle hypoxia

Zhang

Lyu

Liu

et al. 2021

Chemical Engineering Journal

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“…Usually, in order to enhance the light availability for submerged macrophytes and reduce excess nutrients in the water, phosphorus inactivation methods are commonly used in combating lake eutrophication [26][27][28]. For the removal of internal phosphorus loading in the water and sediments, there are chemical (e.g., in situ chemical inactivation), physical (e.g., sediment dredging and aeration) and biological methods (e.g., biomanipulation) [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Effects of Sediments Phosphorus Inactivation on the Life Strategies of Myriophyllum spicatum: Implications for Lake Restoration

Lin

Zhong

Yu³

et al. 2021

Water

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Eutrophication often results in the loss of submerged vegetation in shallow lakes and turns the lake to be a turbid state. Recovery of submerged macrophytes is the key in the restoration of shallow eutrophic lakes to create a clear water state. However, internal loading control was considered as the critical process for the recovery of submerged macrophytes in shallow lakes after the external nutrient reduction. Phoslock® (Lanthanum modified bentonite) is a useful passivation material in controlling the internal loadings (release of phosphorus from the sediments), which was applied to restore the eutrophic lakes. However, the effects of Phoslock® on the growth and life strategies of submerged macrophytes are less focused so far. In the present study, we studied the responses in the growth and morphological characteristics of Myriophyllum spicatum to the addition of Phoslock® to the sediments. Our results showed that the addition of Phoslock® significantly decreased the contents of bioavailable forms of phosphorus in the sediments, such as redox-sensitive phosphorus bound to Fe and Mn compounds (BD–P), phosphorus bound to aluminum (Al–P) and organic phosphorus (Org–P). However, the concentration of the non-bioavailable forms of phosphorus in the sediments, such as calcium bound phosphorus (Ca–P), increased significantly in the Phoslock® treatments compared with the controls. At the end of the experiments, the total biomass, aboveground biomass and relative growth rate (RGR) of M. spicatum decreased significantly in the Phoslock® mesocosms compared with the controls. In contrast, the wet root biomass, root–shoot biomass ratio, root numbers and root length of M. spicatum were significantly higher in the Phoslock® treatments than that in the controls. Our results indicated that the growth of M. spicatum was suppressed by the addition of Phoslock®, and thus the biomass was decreased; however, the increase of root biomass might be beneficial to the inhibition of phosphorus release and resuspension of sediments and to the restoration of the lake ecosystem.

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“…Sustainability 2020, 12, 1462 8 of 14 and 31.04%, and the removal rates of TP were 50.35% and 31.95%, respectively. Without EM activated calcium liquid immersing, nanospheres also had certain purification effect for aquaculture wastewater, because the NBC and zeolite powder are multiple porous materials which have some physical adsorption for nitrogen and phosphorus of aquaculture wastewater [39]. The results mentioned above indicated that the physical adsorption was limited.…”

Section: Effect Of Nanospheres With and Without Microbes On The Purifmentioning

confidence: 99%

“…As indicated in Figure 1, Figure 2, and Figure 3, after seven days of treatment, the removal rates of NH 4 + -N in T2 and T4 were 84.86% and 22.28%, the removal rates of TN were 54.60% and 31.04%, and the removal rates of TP were 50.35% and 31.95%, respectively. Without EM activated calcium liquid immersing, nanospheres also had certain purification effect for aquaculture wastewater, because the NBC and zeolite powder are multiple porous materials which have some physical adsorption for nitrogen and phosphorus of aquaculture wastewater [39].…”

Section: Effect Of Nanospheres With and Without Microbes On The Purifmentioning

confidence: 99%

Purification Effect of the Aquaculture Wastewater and Sediment by Microbial Nanospheres with Different Material Ratios and Dosing Methods

et al. 2020

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Nanospheres were prepared by different materials of nano-bamboo charcoal powder, zeolite powder, and aquaculture pond sediment in different ratios. It was then fermented with effective microorganisms (EM) active calcium liquid to synthesize the bioactive microbial nanospheres. These nanospheres were used to compare the purification effect of ammonium nitrogen (NH 4 + -N), total nitrogen (TN), and total phosphorus (TP) pollutants in aquaculture wastewater. The indoor simulation experiment was also conducted to compare the different dosage methods (one-time dosing without aeration, multiple dosing without aeration, and multiple dosing with aeration) of microbial nanospheres on the removal of organic matter (OM) and effect of the biodegradability (G value) in aquaculture sediment. The results obtained indicated that the purification effect was most remarkable when the mass ratio of nano-bamboo charcoal powder: zeolite powder: pond sediment was 10%: 15%: 75%, in which the maximum removal rate of NH 4 + -N, TN, and TP reached up to 84.86%, 52.15%, and 50.35%, respectively. Under the same microbial nanospheres amount, the effect of one-time addition on the removing of OM in sediment was not as effective as that of multiple dosing. After the 20th day, the removal rate of OM reached 25.99% in multiple dosing treatment and it was 35.58% higher than one-time dosing treatment. The OM content in sediment was reduced by 32.38% under the multiple dosing with aeration treatment. Multiple dosing of microbial nanospheres with aeration increased the G value of sediment about 337.0%. In situ experiment further indicated that the microbial nanospheres dosage with aeration had a good sediment bio-remediation effect, which is applicable to solve the problem of endogenous pollution in aquaculture ponds.leads to the ecological degradation and the serious diseases [3]. Therefore, repairing the eutrophic aquaculture environment requires not only the reduction of nitrogen, phosphorus, and organic matter in the aquaculture water, but also the removal of the sediment mud. In the aspect of aquaculture water purification, the leading technologies include biological filter treatment [4], artificial floating bed cultivation [5], artificial wetland [6], and so on. Due to the shortage of freshwater resources, the high density of breeding and a large amount of bait in the aquaculture industry as well as the present aquaculture water treatments still have problems, such as single treatment method adoption, high cost, and difficult operation [7]. In recent years, a new type of circulating water pond model is applied to reduce the nitrogen and phosphorus content in the aquaculture water, mainly relying on aquatic plants and microbes function [8]. Many studies [9][10][11] have found the composite microbial agents composed of various microbes could make the control effects of aquaculture water quality better. The EM population (containing more than 80 kinds of microbes, with photosynthetic bacteria, lactic acid bacteria, yeast, and actinomycetes as repr...

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Performance of physical and chemical methods in the co-reduction of internal phosphorus and nitrogen loading from the sediment of a black odorous river

Cited by 74 publications

References 44 publications

Exploring a multifunctional geoengineering material for eutrophication remediation: Simultaneously control internal nutrient load and tackle hypoxia

Exploring a multifunctional geoengineering material for eutrophication remediation: Simultaneously control internal nutrient load and tackle hypoxia

Effects of Sediments Phosphorus Inactivation on the Life Strategies of Myriophyllum spicatum: Implications for Lake Restoration

Purification Effect of the Aquaculture Wastewater and Sediment by Microbial Nanospheres with Different Material Ratios and Dosing Methods

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