Hybrid porous phosphate heterostructures as adsorbents of Hg(II) and Ni(II) from industrial sewage

To neutralize the waste pickling solutions and rinsing water, resulting from cleaning metal products s surface of rust by acids solutions, lime is used. Being cheap, this method of sewage neutralization has considerable drawbacks. Forming in the technological pipes strong gypsum depositions and low specific productivity of the equipment for sediment dewatering are most significant of them. Characteristic of aggressive industrial sewage, formed at pickling of ferrous metals presented. Methods of elimination of drawbacks of industrial sewage neutralization by lime considered, including stabilization of neutralized industrial sewage and control of properties of the sediment formed. It was noted, that stability of the circulating water can be provided by accelerating of crystallization of the forming gypsum sediments by introducing in it fine priming powder and heating the neutralized water up to 65-70 °С followed by thermal softening of a part of circulating water, removed out of the circulating system. It was shown, that the heating of the water and the ongoing changes of the composition and properties of the sediment result in decrease of filtration resistance 2-3 folds, increase of deposition speed 3-4 folds and decrease the sediment volume 1.5-2 folds comparing with lime neutralization in cold water. Calculated dozes of lime at the heating were taken the same as at the regular lime neutralization. Elimination of the circulating water oversaturation by bi-water gypsum can be reached also by addition into the water of powder-like gypsum pulp - priming powder for microcrystals of the gypsum, followed by aeration during 30-40 min. This method was tested under industrial conditions. Technological properties of the forming sediment can be improved by sediment treatment by flocculants and preliminary heating of the neutralized water up to 65-70 °С. Control of technological properties of the sediment is done by addition of flocculants and heating of the neutralized water. Recommendations for improving operation of the neutralization facilities presented with indicating particular technological parameters of the equipment operation for sewage and sediment treatment.

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Effect of Wastewater on the Soil and Irrigation Process: A Laboratory Study

10.21523/gcj5.17010105 ◽

2017 ◽

Vol 1 (1) ◽

pp. 46-55 ◽

Cited By ~ 1

Author(s):

Athar Hussain ◽

Manjeeta Priyadarshi ◽

Saif Said ◽

Suraj Negi

Keyword(s):

Heavy Metals ◽

Tap Water ◽

Sewage Treatment ◽

Daily Intake ◽

Sewage Treatment Plant ◽

Treatment Plant ◽

Treated Wastewater ◽

Surface Water Resources ◽

Industrial Sewage ◽

Concentration Levels

Most of the industrial sewage effluents used for irrigation contains heavy metals which cause toxicity to crop plants as the soils are able to accumulate heavy metal for many years. The vegetables grown for the present study were irrigated with treated wastewater brought from a nearby full-scale sewage treatment plant at different compositions along with tap water as a control. The concentration levels of the Cd, Co, Cu, Mn and Zn in the soil were found to below the toxic limits as prescribed in literature. Daily Intake Metals (DIM) values suggest that the consumption of plants grown in treated wastewater and tap water is nearly free of risks, as the dietary intake limits of Cu, Fe, Zn and Mn. The Enrichment Factor for the treated wastewater irrigated soil was found in order Zn> Ni> Pb> Cr> Cu> Co> Mn> Cd. Thus, treated wastewater can be effectively used for irrigation. This will have twofold significant environmental advantages: (1) helpful to reduce the groundwater usage for irrigation and (2) helpful to reduce the stress on surface water resources.

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Investigating Land Based Disposal of Bolivar Reclaimed Water, South Australia

Water Science & Technology ◽

10.2166/wst.1993.0022 ◽

1993 ◽

Vol 27 (1) ◽

pp. 87-96 ◽

Cited By ~ 2

Author(s):

G. Schrale ◽

R. Boardman ◽

M. J. Blaskett

Keyword(s):

Current Practice ◽

Sewage Treatment ◽

Reclaimed Water ◽

South Australia ◽

Working Party ◽

Underground Water ◽

Environmental Cost ◽

Seagrass Beds ◽

Environment Protection ◽

Industrial Sewage

The Bolivar Sewage Treatment Works (STW) processes the urban and industrial sewage from the northern and eastern suburbs of Adelaide. The treatment capacity is equivalent to the sewage production of 1.1 million people. The disposal of more than 40 000 ML of reclaimed water into the sea has caused a progressive degradation of about 950 ha of seagrass beds which threatens the sustainability of the fisheries and marine ecosystems of Gulf St. Vincent. The current practice will no longer be viable to achieve compliance with the SA Marine Environment Protection Act, 1990. A Inter-Departmental Working Party recommmended that the Bolivar reclaimed water be disposed by irrigation of suitable land on the coastal plains north of Adelaide. They proposed the construction of two pipelines: a 12 km long pipeline to extend the distribution of reclaimed water in the most intense portion of the 3 500 hectares of irrigated horticulture on the Northern Adelaide Plains, and a second, 18 km long pipeline to deliver the remainder to a more northerly site for irrigation of an estimated 4 000 hectares of hardwood plantations. The paper summarizes the findings as they relate to public health, environmental, technical and financial aspects of land based disposal. Land based disposal would completely eliminate the marine degradation and also arrest the over-use of the NAP underground water resources for horticulture. The total net costs over thirty years for land based disposal are about $ 21.8 million. The ‘horticultural' pipeline of the land based disposal scheme is expected to be commercially viable. A shortfall in revenue from the afforestation component is expected and may need to be considered as an environmental cost of ceasing marine disposal.

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Development and physicochemical characterization of novel porous phosphate glass bone graft substitute and in vitro comparison with xenograft

Journal of Materials Science Materials in Medicine ◽

10.1007/s10856-021-06532-8 ◽

2021 ◽

Vol 32 (6) ◽

Author(s):

Niketa Chauhan ◽

Nilay Lakhkar ◽

Amol Chaudhari

Keyword(s):

Cell Proliferation ◽

Physicochemical Properties ◽

Bone Graft ◽

Phosphate Glass ◽

Physicochemical Characterization ◽

Bone Graft Substitute ◽

Organic Content ◽

In Vitro Cytotoxicity ◽

Porous Phosphate

AbstractThe process of bone regeneration in bone grafting procedures is greatly influenced by the physicochemical properties of the bone graft substitute. In this study, porous phosphate glass (PPG) morsels were developed and their physicochemical properties such as degradation, crystallinity, organic content, surface topography, particle size and porosity were evaluated using various analytical methods. The in vitro cytotoxicity of the PPG morsels was assessed and the interaction of the PPG morsels with Dental Pulp Stem Cells (DPSCs) was studied by measuring cell proliferation and cell penetration depth. The cell-material interactions between PPG morsels and a commercially available xenograft (XG) were compared. The PPG morsels were observed to be amorphous, biocompatible and highly porous (porosity = 58.45%). From in vitro experiments, PPG morsels were observed to be non-cytotoxic and showed better cell proliferation. The internal surface of PPG was easily accessible to the cells compared to XG.

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Dual-mode electrochemical evaluation of 8‑hydroxy-5-nitroquinoline in industrial sewage

Surfaces and Interfaces ◽

10.1016/j.surfin.2021.101019 ◽

2021 ◽

Vol 23 ◽

pp. 101019

Author(s):

Krishnapandi Alagumalai ◽

Ragurethinam Shanmugam ◽

Shen-Ming Chen ◽

Tse-Wei Chen ◽

Amal M. Al-Mohaimeed ◽

...

Keyword(s):

Dual Mode ◽

Industrial Sewage ◽

Electrochemical Evaluation

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Efficient Solar Domestic and Industrial Sewage Purification via Polymer Wastewater Collector

Chemical Engineering Journal ◽

10.1016/j.cej.2021.131199 ◽

2021 ◽

pp. 131199

Author(s):

Tingzhou Yang ◽

Sai Wang ◽

Benetti Daniele ◽

Kanghong Wang ◽

Yawen Sun ◽

...

Keyword(s):

Sewage Purification ◽

Industrial Sewage

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Pb2+ adsorption by a compost obtained from the treatment of tobacco from smuggled cigarettes and industrial sewage sludge

Environmental Science and Pollution Research ◽

10.1007/s11356-018-3655-x ◽

2018 ◽

Vol 26 (1) ◽

pp. 797-805 ◽

Cited By ~ 4

Author(s):

Daniele Cristina Hass Seremeta ◽

Cleber Pinto da Silva ◽

Rosimara Zittel ◽

Sandro Xavier de Campos

Keyword(s):

Sewage Sludge ◽

Industrial Sewage ◽

Industrial Sewage Sludge

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Management of wastewater trough theatre

5th International Conference on Higher Education Advances (HEAd'19) ◽

10.4995/head19.2019.9162 ◽

2019 ◽

Author(s):

Kristina Tihomirova ◽

Linda Mezule

Keyword(s):

Wastewater Treatment ◽

Teaching Method ◽

Sewage Treatment ◽

Student Knowledge ◽

Cooperation Model ◽

Treatment Technologies ◽

Water And Wastewater ◽

Active Communication ◽

The University ◽

Industrial Sewage

Compulsory study course on wastewater treatment and sewage systems contains lectures, classroom calculations, technical project and laboratory practicum. The course is addressing not only the developing skills in wastewater treatment technologies but also provides preparation of professionals that can communicate with institutions involved in water and wastewater sector. Over the years it has been observed that even after receiving the most sophisticated knowledge and highest markings, students often lack skills in practical communication with industry and implementation of theoretical knowledge in praxis. Here we describe student-centred teaching method that is based on the activities that are similar to theatre and allow: (i) the teacher to find and understand the weaker places in student knowledge gained during the semester; (ii) the students to form professional skills during the active communication with colleagues and mentors from industry. The students work in several groups “INDUSTRY”, “MUNICIPALITY” and EXPERTS”, try to find better solution for industrial sewage treatment and cooperation model with the municipality and present their results. After 2 years of the modernisation and adjustment, the training course has created an interest not only from student side but also from the industry representatives that are interested in communication with the new specialists and develop strong contacts with the university.

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