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https://www.readbyqxmd.com/read/28738553/response-of-soil-physicochemical-properties-and-enzyme-activities-to-long-term-reclamation-of-coastal-saline-soil-eastern-china
#1
Xuefeng Xie, Lijie Pu, Qiqi Wang, Ming Zhu, Yan Xu, Meng Zhang
Soil enzyme activity during different years of reclamation and land use patterns could indicate changes in soil quality. The objective of this research is to explore the dynamics of 5 soil enzyme activities (dehydrogenase, amylase, urease, acid phosphatase and alkaline phosphatase) involved in C, N, and P cycling and their responses to changes in soil physicochemical properties resulting from long-term reclamation of coastal saline soil. Soil samples from a total of 55 sites were collected from a coastal reclamation area with different years of reclamation (0, 7, 32, 40, 63a) in this study...
July 20, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28726714/performance-of-a-novel-recycling-magnetic-flocculation-membrane-filtration-process-for-tetracycline-polluted-surface-water-treatment
#2
Yufei Wang, Hui Jia, Hongwei Zhang, Jie Wang, Wenjin Liu
A recycling magnetic flocculation membrane filtration (RMFMF) process integrating circulating coagulation, magnetic enhanced flocculation and membrane filtration was investigated for the treatment of surface water micro-polluted by tetracycline, a typical pharmaceutical and personal care product. A bench-scale experiment was conducted and several water quality parameters including turbidity, ultraviolet absorbance at 254 nm (UV254), total organic carbon and tetracycline concentration were evaluated, taking coagulation membrane filtration and magnetic flocculation membrane filtration processes as reference treatments...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28719848/transformation-of-don-in-reclaimed-water-under-solar-light-irradiation-leads-to-decreased-haloacetamide-formation-potential-during-chloramination
#3
Ye Du, Xue Zhang, Chao Li, Qian-Yuan Wu, Huang Huang, Hong-Ying Hu
Reclaimed water is usually stored in rivers or lakes before subsequent use. In storage ecosystems, the natural process of solar light irradiation plays a key role in water quality, altering disinfection byproduct formation potential in later use. This study investigated changes in haloacetamide formation potential (HAcAm FP) during subsequent chloramination when reclaimed water was exposed to solar light irradiation. Significant decreases in HAcAm FP were observed for the solar light irradiated reclaimed water, with reductions of 27%-69% for different haloacetamides...
July 10, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28711006/assessment-of-the-municipal-water-cycle-in-china
#4
Tao Wang, Shuming Liu, Xuepeng Qian, Toshiyuki Shimizu, Sébastien M R Dente, Seiji Hashimoto, Jun Nakajima
Water produced from municipal utilities accounts for nearly 10% of the sum water demand in China. The municipal water cycle that integrates processes of urban water supply, water use, sewage treatment, and water reclamation has been assessed for 655 cities across nine drainage areas in mainland China in 2012. These cities in total extracted 55km(3) raw water for municipal use from surface waterbodies and ground aquifers, approximate to the countrywide freshwater extraction of Russia or Italy. After purification and transmission, 45km(3) water was distributed to industrial, service, and domestic users...
July 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28709094/fit-for-purpose-wastewater-treatment-conceptualization-to-development-of-decision-support-tool-i
#5
Gyan Chhipi-Shrestha, Kasun Hewage, Rehan Sadiq
This article is the first in a series of two papers. Paper I focuses on model conceptualization and development, and Paper II in the series focuses on model validation and implementation. The amount of water reuse has been increasing across the globe. Wastewater can be treated based on the intended end use of reclaimed water. Fit-for-purpose wastewater treatment (WWT) simultaneously considers intended end use, economic viability, and environmental sustainability. WWT technologies differ mainly in terms of treatment efficiency, cost, energy use, and associated carbon emissions...
July 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28707240/elemental-mobility-in-sulfidic-mine-tailings-reclaimed-with-paper-mill-by-products-as-sealing-materials
#6
Yu Jia, Nanna Stahre, Maria Mäkitalo, Christian Maurice, Björn Öhlander
Sealing layers made of two alkaline paper mill by-products, fly ash and green liquor dregs, were placed on top of 50-year-old sulfide-containing tailings as a full-scale remediation approach. The performance and effectiveness of the sealing layers with high water content for an oxygen barrier and low hydraulic conductivity for a sealing layer in preventing the formation of acid rock drainage were evaluated 5 years after the remediation. The leaching behavior of the covered tailings was studied using batch leaching tests (L/S ratio 10 L/kg)...
July 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28700973/fit-for-purpose-wastewater-treatment-testing-to-implementation-of-decision-support-tool-ii
#7
Gyan Chhipi-Shrestha, Kasun Hewage, Rehan Sadiq
This paper is the second in a series of two papers. In Paper I, a decision support tool (DST), FitWater, was developed for evaluating the potential of wastewater treatment (WWT) trains for various water reuse applications. In the present paper, the proposed DST has been tested and implemented. FitWater has been tested with several existing WWT plants in Canada and the USA, demonstrating FitWater's effectiveness in estimating life cycle cost (LCC), health risk, and energy use. FitWater has also been implemented in a newly planned neighbourhood in the Okanagan Valley (BC, Canada) by developing 12 alternative WWT trains for water reuse in lawn and public parks irrigation...
July 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28689129/the-potential-implications-of-reclaimed-wastewater-reuse-for-irrigation-on-the-agricultural-environment-the-knowns-and-unknowns-of-the-fate-of-antibiotics-and-antibiotic-resistant-bacteria%C3%A2-and-resistance-genes-a-review
#8
REVIEW
Anastasis Christou, Ana Agüera, Josep Maria Bayona, Eddie Cytryn, Vasileios Fotopoulos, Dimitra Lambropoulou, Célia M Manaia, Costas Michael, Mike Revitt, Peter Schröder, Despo Fatta-Kassinos
The use of reclaimed wastewater (RWW) for the irrigation of crops may result in the continuous exposure of the agricultural environment to antibiotics, antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs). In recent years, certain evidence indicate that antibiotics and resistance genes may become disseminated in agricultural soils as a result of the amendment with manure and biosolids and irrigation with RWW. Antibiotic residues and other contaminants may undergo sorption/desorption and transformation processes (both biotic and abiotic), and have the potential to affect the soil microbiota...
July 3, 2017: Water Research
https://www.readbyqxmd.com/read/28683375/development-of-an-atp-luminescence-based-method-for-assimilable-organic-carbon-determination-in-reclaimed-water
#9
Guo-Qiang Li, Tong Yu, Qian-Yuan Wu, Yun Lu, Hong-Ying Hu
Assimilable organic carbon (AOC) is an important indicator of the biological stability of reclaimed water. In this study, a new rapid and more stable method for AOC measurement in reclaimed water was proposed. Indigenous microbial culture from secondary effluent was used as the inoculum, and bacterial growth was determined by the quantity of adenosine triphosphate (ATP) in the form of luminescence instead of plate count. ATP luminescence had a high correlation with biogrowth both in pure acetate solutions and reclaimed waters...
June 29, 2017: Water Research
https://www.readbyqxmd.com/read/28679121/effects-of-extreme-rainfall-events-on-the-distribution-of-selected-emerging-contaminants-in-surface-and-groundwater-the-guadalete-river-basin-sw-spain
#10
Carmen Corada-Fernández, Lucila Candela, Nivis Torres-Fuentes, Marina G Pintado-Herrera, Maria Paniw, Eduardo González-Mazo
This study is focused on the Guadalete River basin (SW, Spain), where extreme weather conditions have become common, with and alternation between periods of drought and extreme rainfall events. Combined sewer overflows (CSOs) occur when heavy rainfall events exceed the capacity of the wastewater treatment plants (WWTP), as well as pollution episodes in parts of the basin due to uncontrolled sewage spills and the use of reclaimed water and sludge from the local WWTP. The sampling was carried out along two seasons and three campaigns during dry (March 2007) and extreme rainfall (April and December 2010) in the Guadalete River, alluvial aquifer and Jerez de la Frontera aquifer...
July 2, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28666149/phosphorus-removal-performance-and-biological-dephosphorization-process-in-treating-reclaimed-water-by-integrated-vertical-flow-constructed-wetlands-ivcws
#11
Lu Du, Qianru Chen, Panpan Liu, Xia Zhang, Huihui Wang, Qiaohong Zhou, Dong Xu, Zhenbin Wu
Phosphorous removal in adsorption had been extensively researched; however, the biological dephosphorization process and optimum operating parameters have not been discussed or quantified in Integrated Vertical-flow Constructed Wetlands (IVCWs). In this study, IVCWs planted with different plants were employed to evaluate total phosphorus (TP) treatment performance under different hydraulic retention times (HRTs), in summer and autumn. The results showed that the systems planted with Canna generalis showed the highest TP removal efficiency (77%) under a three-day HRT in autumn...
June 19, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28646778/the-hydrological-functioning-of-a-constructed-fen-wetland-watershed
#12
Scott J Ketcheson, Jonathan S Price, Owen Sutton, George Sutherland, Eric Kessel, Richard M Petrone
Mine reclamation requires the reconstruction of entire landforms and drainage systems. The hydrological regime of reclaimed landscapes will be a manifestation of the processes operating within the individual landforms that comprise it. Hydrology is the most important process regulating wetland function and development, via strong controls on chemical and biotic processes. Accordingly, this research addresses the growing and immediate need to understand the hydrological processes that operate within reconstructed landscapes following resource extraction...
June 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28635638/antibiotic-concentrations-decrease-during-wastewater-treatment-but-persist-at-low-levels-in-reclaimed-water
#13
Prachi Kulkarni, Nathan D Olson, Greg A Raspanti, Rachel E Rosenberg Goldstein, Shawn G Gibbs, Amir Sapkota, Amy R Sapkota
Reclaimed water has emerged as a potential irrigation solution to freshwater shortages. However, limited data exist on the persistence of antibiotics in reclaimed water used for irrigation. Therefore, we examined the fate of nine commonly-used antibiotics (ampicillin, azithromycin, ciprofloxacin, linezolid, oxacillin, oxolinic acid, penicillin G, pipemidic acid, and tetracycline) in differentially treated wastewater and reclaimed water from two U.S. regions. We collected 72 samples from two Mid-Atlantic and two Midwest treatment plants, as well as one Mid-Atlantic spray irrigation site...
June 21, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28633950/a-multi-scale-integrated-modeling-framework-to-measure-comprehensive-impact-of-coastal-reclamation-activities-in-yellow-river-estuary-china
#14
Yan Xu, Yanpeng Cai, Tao Sun, Qian Tan
In this paper, an improved multi-scale integrated modeling framework has been established to evaluate coastal reclamation intensity (CRI). About 7 indicators are considered, including ecological degradation intensity (EDI), hydrodynamic disturbance (IHD), engineering types, water quality, economic investment, population growth, and reclaimed land area. Meanwhile, an integrated framework enhanced methods in terms of (a) measuring intensity of ecological degradation process under multi-scale impact, (b) developing the indicator system of CRI, and discussing the driving forces and trends of coastal reclamation, (c) determining fuzzy preference relations of weight and calculating the specific value of CRI with the case study areas of Yellow River estuary from 2000 to 2015...
June 17, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28608808/drivers-of-microbial-risk-for-direct-potable-reuse-and-de-facto-reuse-treatment-schemes-the-impacts-of-source-water-quality-and-blending
#15
Rabia M Chaudhry, Kerry A Hamilton, Charles N Haas, Kara L Nelson
Although reclaimed water for potable applications has many potential benefits, it poses concerns for chemical and microbial risks to consumers. We present a quantitative microbial risk assessment (QMRA) Monte Carlo framework to compare a de facto water reuse scenario (treated wastewater-impacted surface water) with four hypothetical Direct Potable Reuse (DPR) scenarios for Norovirus, Cryptosporidium, and Salmonella. Consumer microbial risks of surface source water quality (impacted by 0-100% treated wastewater effluent) were assessed...
June 13, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28604811/managing-urban-runoff-in-residential-neighborhoods-nitrogen-and-phosphorus-in-lawn-irrigation-driven-runoff
#16
Gurpal S Toor, Marti L Occhipinti, Yun-Ya Yang, Tammy Majcherek, Darren Haver, Lorence Oki
Sources and mechanisms of nutrient transport in lawn irrigation driven surface runoff are largely unknown. We investigated the transport of nitrogen (N) and phosphorus (P) in lawn irrigation driven surface runoff from a residential neighborhood (28 ha) of 56% impervious and 44% pervious areas. Pervious areas encompassing turfgrass (lawns) in the neighborhood were irrigated with the reclaimed water in common areas during the evening to late night and with the municipal water in homeowner's lawns during the morning...
2017: PloS One
https://www.readbyqxmd.com/read/28578243/comparative-study-on-pharmaceuticals-adsorption-in-reclaimed-water-desalination-concentrate-using-biochar-impact-of-salts-and-organic-matter
#17
Lu Lin, Wenbin Jiang, Pei Xu
The synergistic impact of salts and organic matter on adsorption of ibuprofen and sulfamethoxazole by three types of biochar and an activated carbon was investigated using reclaimed water reverse osmosis (RO) concentrate and synthetic solutions spiked with target organic compounds and non-target water constituents (e.g., Na(+), Ca(2+), Mg(2+), K(+), Cl(-), SO4(2-), alkalinity, humic acid (HA), and bovine serum albumin (BSA)). Kinetic modeling was used to better understand the adsorption process between the carbon adsorbents and pharmaceuticals and to elucidate the impact of water chemistry on pharmaceuticals adsorption...
June 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28527182/water-for-agriculture-the-convergence-of-sustainability-and-safety
#18
Sarah M Markland, David Ingram, Kalmia E Kniel, Manan Sharma
Agricultural water is a precious and limited resource. Increasingly more water types and sources are being explored for use in irrigation within the United States and across the globe. As outlined in this chapter, the Produce Safety Rule (PSR) in the Food Safety and Modernization Act (FSMA) provide irrigation water standards for application of water to fruits and vegetables consumed raw. These rules for production and use of water will continue to develop and be required as the world experiences aspects of a changing climate including flooding as well as drought conditions...
May 2017: Microbiology Spectrum
https://www.readbyqxmd.com/read/28512710/effects-of-coexisting-bde-47-on-the-migration-and-biodegradation-of-bde-99-in-river-based-aquifer-media-recharged-with-reclaimed-water
#19
Y Yan, Y Li, M Ma, W Ma, X Cheng, K Xu
Two prominent polybrominated diphenyl ether (PBDE) congeners have been included in the persistent organic pollutant list, 2,2',4,4',5-tetrabromodiphenyl ether (BDE-99) and 2,2,4,4'-tetrabromodiphenyl ether (BDE-47), which have been detected in treated municipal wastewater, river water, and sediments in China. A lab-scale column experiment was established to investigate the effects of the competitive sorption of BDE-47 on BDE-99 biodegradation and migration in two types of river-based aquifer soils during groundwater recharge with reclaimed water...
May 17, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28511136/fate-of-pharmaceuticals-in-soil-after-application-of-stps-products-influence-of-physicochemical-properties-and-modelling-approach
#20
Xela García-Santiago, Juan M Garrido, Juan M Lema, Amaya Franco-Uría
Depurated effluents can be employed as reclaimed water for irrigation in regions with low precipitations, while nutrients-rich biosolids are usually applied as fertilizer for agricultural purposes. However, both practices may result in the accumulation of micropollutants in the soil compartment, the contamination of groundwater, and/or their biotransfer to different living organisms until they finally may reach human receptors. The fate and transport of seven pharmaceutical and personal care products (PPCPs) with different physicochemical properties was analysed for these scenarios employing two different models: the buckets model and the HYDRUS-1D software package...
May 11, 2017: Chemosphere
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