ارتباط با ما
با ما تماس بگیرید
0086-21-58386256
0086-21-58386256
Physicochemical treatments of heavy-metal pollution in waste water have several environmental and structural disadvantages. This Article shows that sulfide-producing yeasts are able to remove ...
Last updated on April 7, 2023. Wastewater treatment plants process water from homes and businesses, which contains nitrogen and phosphorus from human …
What is wastewater agriculture? Family farmers work their fields along a heavily polluted river in China. The family lives in a village where more people than usual die from cancer, probably due to environmental …
The Natural Way To Clean Wastewater John Todd developed a process in the 1980s that mimicked natural ways to purify wastewater. Today, his Eco Machines and Restorers are used for a wide range of municipal and industrial applications. THE …
Using the initial concentrations of lead, cadmium and chromium solutions at 10 ppm, the analysis was continued using contact time 60 mins. Besides that the influences of adsorbent dosage also been studied in a range of 10mg to 30mg.After that contains of heavy metal ions were analyzed using Atomic Adsorption Spectrophotometre (AAS).
Adsorption processes using synthetic or natural particles are more commonly used nowadays as the phenolic molecules can be trapped on the surface of the adsorbent ... Kiai H, Raiti J, El-Abbassi A, Hafidi A (2018) Recovery of phenolic compounds from table olive processing wastewaters using cloud point extraction method. J Environ Chem Eng …
Natural treatments are appropriate for the treatment of domestic wastewaters of small or isolated areas because they require large land areas to be settled. Nonetheless, their advantages are greater than their disadvantages because natural wastewater treatment systems have a low impact on the landscape, use minimal energy and little to no ...
Removal of heavy metal ions from wastewater is of prime importance for a clean environment and human health. Different reported methods were devoted to heavy …
Extensive and long-term use of per- and polyfluoroalkyl substances (PFASs) has caused their widespread distribution in aquatic systems. A new diffusive gradients in thin-films (DGT) passive sampling method based on weak anion exchanger (WAX) binding layer is developed here for monitoring five perfluoroalkyl carboxylic acids (PFCAs), five …
Dyes widely used in the textile, food and pharmaceutical industries pose a pressing threat to plant, animal and human health, as well as natural environments around the world, a new study has found.
Ammonium removal from wastewaters using natural New Zealand zeolites. N.Z. J. Agric. Res., 41 (1998), pp. 427-446. ... Ammonium exchange in aqueous solution using Chinese natural clinoptilolite and modified zeolite. J. Hazard. Mater., 142 (2007), pp. 160-164. View PDF View article CrossRef Google Scholar
The handling, management, and disposal or recycling of wastewaters is an important issue, globally due to the potential public health impacts of poor management. As highlighted in this chapter and several other studies and summaries, wastewater-associated pollutants including human pathogens, endocrine disrupters, and potential carcinogens …
The major objectives of this study were to evaluate the capacity of two natural New Zealand zeolites (clinoptilolite and mordenite) to remove NH4 + from a range of wastewaters under both batch and flow‐through conditions. Effects of two zeolite particle size ranges (0.25–0.50 mm and 2.0–2.83 mm) on NH4 + removal performance were also ...
The research objective of the study is the estimation of a novel low-cost composite material f- (Fe-modified bentonite) as a P and N adsorbent from wastewaters.Τhe present study aimed at examining the phosphate and ammonium removal efficiency from different types of wastewater using f-, by conducting bench-scale …
The feasibility of using natural zeolites as support media for the immobilization of microorganisms in different high-rate reactor configurations (fixed bed, fluidized bed, etc.) is also reviewed. ... these reactor configurations have shown to be feasible for the treatment of different industrial wastewaters. The use of a porous support …
1. Introduction. A large number of chemical and allied industries generate huge amounts of wastewaters which require effluent treatment prior to discharge for meeting stringent norms on Chemical Oxygen Demand (COD), Biological oxygen demand (BOD) and Ammoniacal Nitrogen (NH 4-N).Industrial wastewater treatment is important …
Overview. Science. Wastewater is used water. It includes substances such as human waste, food scraps, oils, soaps and chemicals. In homes, this includes water from …
Liquid–solid adsorption using commercial activated carbons is a key method for removing contaminants from wastewaters or drinking water sources. ... The research is divided into two directions: the use of natural, cheap, and abundant non-conventional materials in raw or modified form and the development of new synthetic materials. The ...
Based on data from 335 field-scale CWs, hybrid CWs (which use two or more types of CW during water treatment) are the most effective for water-quality …
The use of this natural resource as a flocculant improved the coagulation–flocculation process. The authors indicated that color (93.6%), TN (97.2%), and COD (85.7%) were all significantly removed. De-Souza et al. (2014) used Opuntia ficus-indica mucilage to treat jeans laundry effluent and found that COD removal was approximately 64.8% and ...
The removal of ammonium from wastewaters, using natural Australian ze- olite, is therefore better suited to low concentration effluents. Selectivity of the zeolite for ammonium decreases as the solution ammonium fraction increases. From the binary isotherm curve in Fig. 5, the selectivity of the zeolite for am- monium ions over sodium ions was ...
The arsenic pollution of waters and wastewaters is concerning many countries across the world, and because of the effects of arsenic on human health, its removal from waters is of great importance. Adsorption using functionalized activated carbons as a technique for the removal of arsenic from water streams has gained great …
Using equation, we estimate that lithium recovery is only economically viable at present if the LCOWP approaches around US$0.01 m –3 for seawater and US$0.10 m –3 for industrial wastewaters ...
wastewater, following its use for domestic, municipal and industrial purposes; saline water from groundwater, drainage and surface sources. Within these sources there is a …
The recovery of nutrients from wastewaters using microalgae is a reliable process, which can be applied to different wastewater types from sewage to centrate and manure. If adequately designed and operated up to 450 tCO 2, 25 tN, and 2.5 tP per hectare and per year can be fixed, producing up to 200 t/year of valuable microalgae biomass. To ...
The traditional method of removing ammonia from municipal and industrial wastewaters is based on biological treatments. However, it can be easily inhibited by toxic shock ... 3 h-long batch experiments were carried out to remove ammonium ions from the effluents using three natural sorbents, with a particle size of 0.5–1 mm. Their …
Fig. 1 depicts the microtopography of freshly ground and sieved clinoptilolite powder prior to membrane manufacture using transmission electron microscopy (TEM). The raw natural zeolite, as shown in the microtopography images, is composed of many phase patterns. Fig. 1 a shows the general structure of the clinoptilolite coupled with the feldspar …
From an initial concentration of 50 ± 0.7 mg NH 4 –N/L, the NH 4 –N concentration was reduced to 16.3 ± 0.3 mg NH 4 –N/L after 4 hours. This corresponds to an average ammonium removal ...
These wastewaters were fed into solar still systems (SSSSs) and subjected to natural solar evaporation. Elemental analysis of the wastewater samples was performed using ICP-AES to determine the concentrations of various elements including As, Ba, CO, Cr, Fe, Hg, K, Mn, Mg, Na, Ni, P, and Zn.
In the last time, the use of natural additives that are biocompatible, are biodegradable, have low toxicity and are from renewable resources attracted attention of many researchers due to their high ability …
Possibility of Adsorptive Removal of the Frequently Used Antibiotics from Wastewaters using Natural Zeolites – Clinoptilolite. I. M. Rubashvili, L. G. Eprikashvili, T. N.
Constructed wetlands (CWs) for wastewater treatment are engineered systems that are designed and operated in order to use all natural processes involved in the removal of pollutants from wastewaters. CWs are designed to take advantage of many of the same processes that occur in natural wetlands, but do so within a more controlled …
However, after using natural zeolite for water decontamination, the fate of the loaded zeolite with heavy metals and/or radionuclides needs further investigation. ... Ammonium removal from wastewaters using natural New Zealand zeolites. New Zealand Journal of Agricultural Research, 41 (1998), pp. 427-446. CrossRef View in Scopus …
This review mainly focused on the wastewater treatment using natural polymers and the techniques involved for their extraction from natural sources. ... As a result, to improve their performance in removing colors from diverse wastewaters, these polymers should be changed using a chemical and physical treatment technique. It is …
The objective of this study is to compare and propose a new wastewater technologies using wetland, weirs as an aeration source, finally add Mouringa Oleifera seeds which proven …
Hence, this study demonstrated and proved that natural zeolite could be an effective adsorbent for removal of the selected antibiotics from wastewaters. View full-text Article
Ammoniacal nitrogen (ammonia and ammonium) in agricultural wastewaters can promote eutrophication of receiving waters and be potentially toxic to fish and other aquatic life. Zeolites, which are hydrated aluminum‐silicate minerals, have an affinity for ammonium ions (NH 4 + ) and are, therefore, potentially useful in removing this …
The barplots were generated using ggplot2 v. 3.3.0 and the abundance heatmaps were generated using plot_heatmap from phyloseq while the prevalence heatmaps were generated using pheatmap from the ...
