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Topic Review
Heat Recovery from Wastewater
Wastewater from domestic, industrial and commercial developments maintains considerable amounts of thermal energy after discharging into the sewer system. 
  • 1.7K
  • 29 Jun 2021
Topic Review
Heat Stress Affect Wheat
Heat stress (HS) is one of the major abiotic stresses affecting the production and quality of wheat. Rising temperatures are particularly threatening to wheat production.
  • 694
  • 07 Mar 2022
Topic Review
Heatwave Events over the Yangtze River Basin
Heatwave events (HWEs) have strong impacts on human health, ecosystems, and sustainable social development. In the future, the increase in HWEs over the Yangtze River Basin (YRB) region is likely to be associated with the enhancement of the western-Pacific subtropical high (WPSH) and South-Asian high (SAH), and this enhancement was also greater under SSP585. The results from the high-resolution simulation of the RCM can provide an important reference for disaster prevention and mitigation in the future.
  • 448
  • 08 Feb 2022
Topic Review
Heavy Metal Contamination Chan Thnal Reservoir
Chan Thnal reservoir, built during the Pol Pot period, is the major water source for the people in Krang Chek commune, Kampong Speu Province, Cambodia. Metal pollution caused by agricultural activities, improper wastewater treatment, and municipal waste disposal poses serious environmental health problems.
  • 630
  • 20 Dec 2021
Topic Review
Heavy Metal Soil Contamination Detection Using Geochemistry and Field Spectroradiometry
Technological advances in hyperspectral remote sensing have been widely applied in heavy metal soil contamination studies, as they are able to provide assessments in a rapid and cost-effective way. The present work investigates the potential role of combining field and laboratory spectroradiometry with geochemical data of lead (Pb), zinc (Zn), copper (Cu) and cadmium (Cd) in quantifying and modelling heavy metal soil contamination (HMSC) for a floodplain site located in Wales, United Kingdom. The study objectives were to: (i) collect field- and lab-based spectra from contaminated soils by using ASD FieldSpec® 3, where the spectrum varies between 350 and 2500 nm; (ii) build field- and lab-based spectral libraries; (iii) conduct geochemical analyses of Pb, Zn, Cu and Cd using atomic absorption spectrometer; (iv) identify the specific spectral regions associated to the modelling of HMSC; and (v) develop and validate heavy metal prediction models (HMPM) for the aforementioned contaminants, by considering their spectral features and concentrations in the soil. Herein, the field- and lab-based spectral features derived from 85 soil samples were used successfully to develop two spectral libraries, which along with the concentrations of Pb, Zn, Cu and Cd were combined to build eight HMPMs using stepwise multiple linear regression. The results showed, for the first time, the feasibility to predict HMSC in a highly contaminated floodplain site by combining soil geochemistry analyses and field spectroradiometry. The generated models help for mapping heavy metal concentrations over a huge area by using space-borne hyperspectral sensors. The results further demonstrated the feasibility of combining geochemistry analyses with filed spectroradiometric data to generate models that can predict heavy metal concentrations.
  • 1.2K
  • 30 Oct 2020
Topic Review
Heavy Metals and Metalloids
The contamination of soil by heavy metals and metalloids is a worldwide problem due to the accumulation of these compounds in the environment, endangering human health, plants, and animals. Heavy metals and metalloids are normally present in nature, but the rise of industrialization has led to concentrations higher than the admissible ones. They are non-biodegradable and toxic, even at very low concentrations. Several techniques have been developed over the years: - physical remediation (e.g., washing, thermal desorption, solidification), - chemical remediation (e.g., adsorption, catalysis, precipitation/solubilization, electrokinetic methods), - biological remediation (e.g., biodegradation, phytoremediation, bioventing), and combined remediation (e.g., electrokinetic–microbial remediation; washing–microbial degradation).
  • 2.5K
  • 20 May 2021
Topic Review
Heavy Metals Biosorption by Algae
Seaweeds are mostly used in the wastewater treatment for removing toxic heavy metals.
  • 524
  • 10 Apr 2023
Topic Review
Heavy Metals in Agricultural Soils
Population growth and increasing food demand have led to an intensification of agricultural production systems, putting stress on soils and increasing soil contaminants. Some human-induced contaminants, such as heavy metals (HMs), are well-known and have been present in agricultural soils for a long time. In order to provide an overview of HMs in agricultural soils, it is important to investigate agriculturally related sources of contamination with HMs, behaviour of HMs in agricultural soils, as well as their interactions with soil microorganisms, fauna, and plants.
  • 725
  • 08 Dec 2022
Topic Review
Heavy Metals in Medicinal Plants
It is possible for heavy metals (HMs) to be present in pharmaceutical herb materials coming from anthropogenic activities like agriculture, industrial waste, and natural sources. In various ethnic groups, there is evidence that contaminants were purposefully added in the belief that they had some sort of therapeutic benefit. HM toxicity of medicinal plant products has been linked to a wide range of adverse health effects, causing dysfunction of the liver, kidney, and heart, and even death.
  • 740
  • 17 Feb 2023
Topic Review
Heavy Metals Removal from Contaminated Soil by Phytoremediation
Pollution from heavy metals is one of the significant environmental concerns facing the world today. Human activities, such as mining, farming, and manufacturing plant operations, can allow them access to the environment. Heavy metals polluting soil can harm crops, change the food chain, and endanger human health. Thus, the overarching goal for humans and the environment should be the avoidance of soil contamination by heavy metals. Heavy metals persistently present in the soil can be absorbed by plant tissues, enter the biosphere, and accumulate in the trophic levels of the food chain. The removal of heavy metals from contaminated soil can be accomplished using various physical, synthetic, and natural remediation techniques (both in situ and ex situ). The most controllable (affordable and eco-friendly) method among these is phytoremediation. The removal of heavy metal defilements can be accomplished using phytoremediation techniques, including phytoextraction, phytovolatilization, phytostabilization, and phytofiltration.
  • 515
  • 21 Jul 2023
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