Effect of multilayer substrate configuration in horizontal subsurface flow constructed wetlands: assessment of treatment performance, biofilm development, and solids accumulation

Ding, Yanli; Lyu, Tao; Bai, Shaoyuan; Li, Zhenling; Ding, Haijing; You, Shijun; Quan, Xie

doi:10.1007/s11356-017-0636-4

Cited by 22 publications

(13 citation statements)

References 28 publications

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“…It is worth describing that microbial degradation is an important pathway during removal of pollutants in CWs. Some authors [14,16,38] have revealed that the microbial activity and metabolic richness in the interstitial water and biofilm in CWs are influenced by CW design, vegetation, and filter material. In this study, the microbial film was not analyzed, but it is recommended to analyze it along with design parameters.…”

Section: Concentration and Removal Of Pollutants In Cw Microcosmsmentioning

confidence: 99%

Wastewater Treatment by Constructed Wetland Eco-Technology: Influence of Mineral and Plastic Materials as Filter Media and Tropical Ornamental Plants

Castro

Marín-Muñiz

Nakase-Rodríguez

et al. 2019

Water

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Constructed wetlands (CWs) are sustainable technologies where the channels are filled with porous material and plants, which collectively remove pollutants, depending on the type of substrate and vegetation. This study evaluated CWs and their functionality by comparing three ornamental plants (Canna indica, Cyperus papyrus, and Hedychium coronarium) as a phytoremediation process of wastewater, in CWs filled with layers of porous stone–tepezil–plastic residues–soil (S-A), or in microcosms with layers of porous stone–tepezil–soil without the presence of plastic (S-B). The findings during 180 days showed that the removals of pollutants (chemical oxygen demand (COD), total solids suspended (TSS), nitrogen as ammonium (N-NH4), as nitrate (N-NO3), and phosphate (P-PO4) were 20%–60% higher in microcosms with plants than in the absence of plants. Statistical differences were not observed when comparing removal effects among S-A and S-B, indicating that plastic residues as filter material in CWs did not affect the pollutant removal, growth, flowering, and shoots of plants. The use of plastic residues as filter may represent a less costly alternative in CW establishments. Dependence on N-NH4 and TSS removal was observed according to plant species. The three species used are suitable for using in CWs as wastewater treatment. In addition, the ornamental plants could generate interest for a commercial option.

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Section: Concentration and Removal Of Pollutants In Cw Microcosmsmentioning

confidence: 99%

Wastewater Treatment by Constructed Wetland Eco-Technology: Influence of Mineral and Plastic Materials as Filter Media and Tropical Ornamental Plants

Castro

Marín-Muñiz

Nakase-Rodríguez

et al. 2019

Water

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“…For example, sulfatoreduction implies metallic sulphides generation and subsequently its precipitated into the CW by chemical speciation. This process, in turn, results in clogging which is one of the disadvantages of CW [92][93][94][95].…”

Section: Genusmentioning

confidence: 99%

Review of Constructed Wetlands for Acid Mine Drainage Treatment

Pat-Espadas

Loredo-Portales

Amábilis-Sosa

et al. 2018

Water

106

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The mining industry is the major producer of acid mine drainage (AMD). The problem of AMD concerns at active and abandoned mine sites. Acid mine drainage needs to be treated since it can contaminate surface water. Constructed wetlands (CW), a passive treatment technology, combines naturally-occurring biogeochemical, geochemical, and physical processes. This technology can be used for the long-term remediation of AMD. The challenge is to overcome some factors, for instance, chemical characteristics of AMD such a high acidity and toxic metals concentrations, to achieve efficient CW systems. Design criteria, conformational arrangements, and careful selection of each component must be considered to achieve the treatment. The main objective of this review is to summarize the current advances, applications, and the prevalent difficulties and opportunities to apply the CW technology for AMD treatment. According to the cited literature, sub-surface CW (SS-CW) systems are suggested for an efficient AMD treatment. The synergistic interactions between CW components determine heavy metal removal from water solution. The microorganism-plant interaction is considered the most important since it implies symbiosis mechanisms for heavy metal removal and tolerance. In addition, formation of litter and biofilm layers contributes to heavy metal removal by adsorption mechanisms. The addition of organic amendments to the substrate material and AMD bacterial consortium inoculation are some of the strategies to improve heavy metal removal. Adequate experimental design from laboratory to full scale systems need to be used to optimize equilibria between CW components selection and construction and operational costs. The principal limitations for CW treating AMD is the toxicity effect that heavy metals produce on CW plants and microorganisms. However, these aspects can be solved partially by choosing carefully constructed wetlands components suitable for the AMD characteristics. From the economic point of view, a variety of factors affects the cost of constructed wetlands, such as: detention time, treatment goals, media type, pretreatment type, number of cells, source, and availability of gravel media, and land requirements, among others.

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“…Parameter atau ukuran yang dapat menggambarkan kemampuan tanah dalam melewatkan air disebut sebagai konduktivitas hidrolik (Hydraulic Conductivity) (1,2,(62)(63)(64)(65)(66)(67)(68)(69)(70)(71) . Tingkat kemampuan dari tanah untuk melewatkan air sangat sekali dipengaruhi oleh kadar air di dalam tanah.…”

Section: Konduktivitas Hidrolikunclassified

“…dimana: Ks adalah konduktivitas hidrolik (1,2,(62)(63)(64)(65)(66)(67)(68)(69)(70)(71) dalam keadaan jenuh; V adalah volume air yang mengalir melalui masa (contoh) tanah dengan luas penampang A dalam jangka waktu t; dan (H2-H1) adalah perbedaan tinggi permukaan air (hydraulic head diference) yang mengalir melewati contoh (kolom) tanah sepanjang L. H1 adalah tinggi hidrolik pada titik masuknya air, sedangkan H2 adalah tinggi hidrolik pada tempat keluarnya air.…”

Section: Konduktivitas Hidrolikunclassified

Asam Posfat (H3PO4): Ionic Transformation of Phosphoric Acid in Aqueous Solution

Warlinda¹,

Zainul²

2019

Preprint

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Asam fosfat merupakan merupakan asam mineral anorganik yang memiliki rumus kimia H3PO4. Asam fosfat juga dikenal pula sebagai asam ortofosfat atau asam fosfat(V). Asam fosfat berwujud zat padat dengan T.D =280°C dan T.L = 44,1°C dan pada temperatur tinggi (t =1040 °C), mengalami disosiasi. Sumber yang pada umumnya dari asam fosfat adalah larutan air 85%.Kelarutan senyawa asam fosfat menyebabkan terjadinya interaksi suatu sistem biologis yang mengamati sifat interaksi dari masing-masing molekul merupakan suatu proses yang sangat kompleks dan akan sulit jika melalui percobaan. Penelitian ini bertujuan untuk menganalisis interaksi molekuler dan kinetik dari senyawa asam fosfat. Metode yang digunakan adalah dengan pemodelan menggunakan chem office serta melalui jurnal hasil penelitian mengenai asam fosfat. Sifat-sifat termokimia dari senyawa asam fosfat dalam fase liquid ∆𝑓𝐻0=-3055 kJ /mol,𝑆0 = 95,54 J/molK, dan ∆𝐺0= -3015 kJ/molK. Interaksi atau transformasi suatu ion dapat dilihat dari pengaruh aspek sifat termodinamika senyawa ion (asam fosfat) dalam suatu larutan melalui perhitungan viskositas, kecepatan hanyut,dan mobilitas yang akan mempengaruhi tingkat konduktivitas senyawa asam fosfat. Asam fosfat memiliki kecepatan hayut 0,41508 𝑉/𝑐𝑚, konduktivitas listrik 9,2 Ms/cm untuk persen massa 0,5%, mobilitas relative ion H+ dan PO43- adalah 1,62 dan 8,40 serta tingkat viskositas 3.86 mPa·s. Berdasarkan hasil kalkulasi dari Chem 3D, energy kinetik rotasi atau MM2 Dinamycs rata-rata dari asam fosfat sekitar 0.0278 dengan MM2 minimization total 3.4350

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Effect of multilayer substrate configuration in horizontal subsurface flow constructed wetlands: assessment of treatment performance, biofilm development, and solids accumulation

Cited by 22 publications

References 28 publications

Wastewater Treatment by Constructed Wetland Eco-Technology: Influence of Mineral and Plastic Materials as Filter Media and Tropical Ornamental Plants

Wastewater Treatment by Constructed Wetland Eco-Technology: Influence of Mineral and Plastic Materials as Filter Media and Tropical Ornamental Plants

Review of Constructed Wetlands for Acid Mine Drainage Treatment

Asam Posfat (H3PO4): Ionic Transformation of Phosphoric Acid in Aqueous Solution

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