scholarly journals Combined Industrial Wastewater Treatment in Anaerobic Bioreactor Posttreated in Constructed Wetland

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Bibi Saima Zeb ◽  
Qaisar Mahmood ◽  
Saima Jadoon ◽  
Arshid Pervez ◽  
Muhammad Irshad ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Constructed Wetland ◽  
Industrial Wastewater ◽  
Industrial Effluents ◽  
Quality Standards ◽  
Water Quality Standards ◽  
Anaerobic Bioreactor ◽  
Treated Effluent ◽  
Removal Efficiencies

Constructed wetland (CW) with monoculture ofArundo donaxL. was investigated for the posttreatment of anaerobic bioreactor (ABR) treating combined industrial wastewater. Different dilutions of combined industrial wastewater (20, 40, 60, and 80) and original wastewater were fed into the ABR and then posttreated by the laboratory scale CW. The respective removal efficiencies of COD, BOD, TSS, nitrates, and ammonia were 80%, 78–82%, 91.7%, 88–92%, and 100% for original industrial wastewater treated in ABR. ABR was efficient in the removal of Ni, Pb, and Cd with removal efficiencies in the order of Cd (2.7%) > Ni (79%) > Pb (85%). Posttreatment of the ABR treated effluent was carried out in lab scale CW containingA. donaxL. CW was effective in the removal of COD and various heavy metals present in ABR effluents. The posttreatment in CW resulted in reducing the metal concentrations to 1.95 mg/L, 0 mg/L, and 0.004 mg/L for Ni, Pb, and Cd which were within the permissible water quality standards for industrial effluents. The treatment strategy was effective and sustainable for the treatment of combined industrial wastewater.

scholarly journals Enhanced removal of nutrients and heavy metals from domestic-industrial wastewater in an academic campus of Hanoi using modified hybrid constructed wetlands

2020 ◽  
Vol 82 (10) ◽  
pp. 1995-2006
Author(s):  
Mai Huong ◽  
Dan-Tam Costa ◽  
Bui Van Hoi
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Constructed Wetlands ◽  
Constructed Wetland ◽  
Aquatic Ecosystems ◽  
Industrial Wastewater ◽  
Oxygen Demand ◽  
Outdoor Experiment ◽  
Removal Efficiencies ◽  
Cyperus Alternifolius

Abstract Vietnam, like many developing countries, is facing serious water quality issues due to discharging wastewaters without treatment or with improper treatment, which can constitute a potential risk for aquatic ecosystems, food safety and human health. Hybrid constructed wetlands with four substrate layers (HCW) and modified hybrid constructed wetland (MHCW-1 and MHCW-2) with seven substrate layers were designed to evaluate the enhanced treatment capacity for wastewaters. To this end, we carried out an outdoor experiment at the Vietnam Academy of Science and Technology, Vietnam to treat its wastewaters from April to August 2019. All constructed wetland units were planted with reed Phragmites australis and cyperus Cyperus alternifolius; and specifically wetland MHCW-2 was cultured with earthworm Perionys excavates. Results indicated that MHCW-1 and MHCW-2 with seven substrate layers had higher removal efficiencies of -N, TKN and TP than HCW system. More substrate layers in MHCW-1 and MHCW-2 also resulted in increase of Cu and Pb removal efficiencies, with 73.5%, 79.4%, 71.5% and 67.8%, respectively. Particularly, earthworm addition in MHCW-2 was more efficient in decreasing the concentrations of biochemical oxygen demand (BOD5), with removal efficiency over 70%.

scholarly journals Development and Substantiation of Regional Water Quality Standards in Respect of Heavy Metals Content for the Upper Kama Basin Water Bodies

2015 ◽  
pp. 50-64
Author(s):  
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Temporal Variability ◽  
Natural Waters ◽  
Quality Standards ◽  
Water Bodies ◽  
Water Quality Standards ◽  
Industrial Complexes ◽  
Basin Water ◽  
Regional Water

The paper presents a new methodology for establishing regional water quality standards for the Upper Kama water bodies. Water bodies of the Upper Kama Basin are receiving wastewater from one of the largest industrial complexes of the Kama basin – Solikamsk-Berezniki industrial hub. The approach takes into account factors that determine the content of heavy metals in natural waters and the spatial/temporal variability of their content in the water bodies of the Upper Kama basin. The developed approach is implemented in establishment of regional water quality standards for the Upper Kama basin.

Analysis of Chemical Properties and Heavy Metals from Cisadane River, Tangerang, Indonesia

2021 ◽  
Vol 18 (1) ◽  
pp. 81-87
Author(s):  
Desy Rosarina ◽  
Ellysa Kusuma Laksanawati ◽  
Dewi Rosanti
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Chemical Properties ◽  
Data Retrieval ◽  
Quality Standards ◽  
Class Ii ◽  
Quality Standard ◽  
Water Quality Standards ◽  
Water Quality Standard ◽  
A Value

This paper explained heavy metals and chemical properties from the Cisadane River in Tangerang City. A survey method was used to determine the place for sampling the test material. Water measurement is carried out in situ and laboratory tests. Data retrieval was done by purposive sampling determining three observation stations, namely in the Taman Gajah Tunggal park area (station1), Babakan Cikokol residential area (station 2), and Karawaci paper mill area (station 3). The analysis was carried out exactly using analysis. Namely, analysis carried out in the laboratory. The parameters observed were COD, phosphate, DO, BOD, pH. Results of this study informed the water quality in the Cisadane City river did not meet Class II Water Quality Standards based on Government Regulation Number 82, the year 2001. The COD content only meets class II water quality standards at stations 1 and 3. BOD and phosphate content is high and exceeds class II water quality standards. Heavy metal content still meets the water quality standard threshold with a value of Cd less than 0.01 mg/L, Cu less than 0.02 mg/L, Pb less than 0.03mg/L, and Cr less than 0.05mg/L. Zn content exceeds the water quality standard threshold at station three and meets water quality standards at stations 1 and 2 with a value of less than 0.05mg/L.

scholarly journals Arsenic pollution in Quaternary sediments and water near a former gold mine

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Łukasz Stachnik ◽  
Bartosz Korabiewski ◽  
Jerzy Raczyk ◽  
Michał Łopuch ◽  
Iwo Wieczorek
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Surface Water ◽  
Surface Waters ◽  
Preferential Flow ◽  
Arsenic Concentration ◽  
Quality Standards ◽  
Arsenic Contamination ◽  
Water Quality Standards ◽  
Quaternary Sediments

Abstract Contamination of water and sediments with arsenic and heavy metals is a global issue affecting human health. Regions covered with Quaternary deposits have received little attention from the point of view of the flux of arsenic and heavy metals from sediments to surface water. This study aims to determine the flux of arsenic and other heavy metals from Quaternary sediments to surface waters in an area affected by the former Złoty Stok gold and arsenic mine. Contamination in surface waters and sediments was caused by arsenic, whereas concentrations of metals were usually within water quality standards. Arsenic contamination of surface water increased in the lower part of the basin covered by Quaternary sediments, and exceeded water quality standards by 2 orders of magnitude. Arsenic mass flux exceeded 8 kg/day near the confluence of the Trująca River with the Nysa Kłodzka, a main tributary of the Oder River. An increase in arsenic concentration in the lower part of the basin is related to mine tailings and preferential flow of groundwater through Quaternary sediments. In future, water resources scarcity may lead to an increase in arsenic contamination in surface and groundwater.

scholarly journals A Novel Approach to Reduce the Environmental Footprint of Maritime Shipping

2021 ◽  
Author(s):  
Domenico Flagiello ◽  
Martina Esposito ◽  
Francesco Di Natale ◽  
Kent Salo
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Quality Standards ◽  
Pilot Scale ◽  
Water Quality Standards ◽  
Environmental Benefit ◽  
Sulphur Compounds ◽  
Gas Cleaning ◽  
Maritime Shipping ◽  
Exhaust Gas Cleaning

AbstractMaritime shipping is a strategic sector with a strong international vocation and management. The need to define regulations valid for many different countries without generating disparities of treatment slowed down the formulation of environmental regulations, especially for atmospheric emissions. In particular, regulations pertaining to the reduction of sulphur compounds allowed two distinct approaches: the use of low-sulphur fuels or exhaust gas cleaning systems, the so-called Scrubbers. The actual implementation of these solutions presents specific concerns either related to the toxicity of atmospheric by-products and to the fuel cost or to the generation of polluting washwaters that may need treatment before discharge. In this paper we analyzed the potential environmental benefit deriving from the use of a distillate fuel, not compliant with current IMO Sulphur Regulations, together with a Scrubber. The pilot-scale experimental results indicated that a limited amount of water and/or scrubber volume is needed to reduce sulphur emissions below regulations on maritime shipping, especially with the addition of NaOH reaching a water-saving between 25%-33% compared to the use of pure seawater. Experiments indicated that scrubber washwater PAHs emissions are within the available water quality standards indicated by EU and USA guidelines. A bottom-up analysis on heavy metals concentration shed light on the prominent role of metal-parts corrosion on the washwater emissions. Taking into account for corrosion phenomena, the actual heavy metals concentration in the washwater deriving from scrubbing was normally below the water quality standards.

scholarly journals WHO water quality standards Vs Synergic effect(s) of fluoride, heavy metals and hardness in drinking water on kidney tissues

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Hewa M. S. Wasana ◽  
Gamage D. R. K. Perera ◽  
Panduka De S. Gunawardena ◽  
Palika S. Fernando ◽  
Jayasundera Bandara
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Drinking Water ◽  
Quality Standards ◽  
Synergic Effect ◽  
Water Quality Standards

scholarly journals Relationship between levels of the heavy metals lead, cadmium and mercury, and metallothionein in the gills and stomach of Crassostrea iredalei and Crassostrea glomerata

F1000Research ◽  
2018 ◽  
Vol 7 ◽  
pp. 1239 ◽  
Author(s):  
Asus Maizar Suryanto Hertika ◽  
Kusriani Kusriani ◽  
Erlinda Indrayani ◽  
Rahmi Nurdiani ◽  
Renanda B. D. S. Putra
Keyword(s):  
Heavy Metals ◽  
Water Quality ◽  
Heavy Metal ◽  
Quality Standards ◽  
Atomic Absorption Spectrophotometry ◽  
Water Quality Standards ◽  
Absorption Spectrophotometry ◽  
Metal Levels ◽  
Permissible Levels ◽  
Local Water

Background: The objective of this study was to compare the levels of heavy metals (Pb, Hg, and Cd) and metallothionein (MT) in the gills and stomach of two species of mussels (Crassostrea iredalei and Crassostrea glomerata), and to observe the ability of the mussels to absorb the heavy metals Pb, Hg and Cd present in the water. Methods: The mussels were obtained from Mayangan, Kenjeran and Gresik ports, East Java, Indonesia. MT levels were determined using ELISA. Heavy metal levels of Pb, Hg and Cd were assayed using atomic absorption spectrophotometry. Results: The levels of Pb and Cd in water were below the maximum permissible levels for local water quality standards. By contrast, the level of Hg in the water was above the maximum permissible levels for water quality standards. At Mayangan Port (Station 1), the level of Pb was higher than Hg and Cd. Levels of MT and heavy metals varied greatly among of C. iredalei and C. glomerata individuals, but were always higher in the gills than in the stomach. The highest MT level (160,250 ng/g) was observed at Kenjeran Port (Station 2). MT levels were shown to be significantly associated with heavy metal level (P<0.0001). Conclusions: This result indicates that MT may be responsible for the sequestration of these heavy metals, as has already been observed in terrestrial animals.

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