Waste date palm-derived biochar (DPBC) was modified with nano-zerovalent iron (BC-ZVI) and silica (BC-SiO2) through mechanochemical treatments and evaluated for arsenate (As(V)) removal from water. The feedstock and synthesized adsorbents were characterized through proximate, ultimate, and chemical analyses for structural, surface, and mineralogical compositions. BC-ZVI demonstrated the highest surface area and contents of C, N, and H. A pH range of 2–6 was optimum for BC-ZVI (100% removal), 3–6 for DPBC (89% removal), and 4–6 for BC-SiO2 (18% removal).

Novel carbon nanodots (nCD-DBC) and nano zero-valent iron composites (nZVI-DBC) were synthesized using date palm waste-derived biochar (DBC). The synthesized materials were analyzed for chemical and structural composition by using FTIR, SEM, XRD, and TGA, and evaluated for their methylthioninium chloride dye (MB) removal efficiency from contaminated aqueous solutions. pH 7.0 was found optimum for the highest MB removal in sorption batch studies.

Purpose Biochar, due to its heterogeneity, may not be equally effective for cationic and anionic metals/metalloid immobilization in soil. Biochar modification could facilitate the immobilization of specific metals/metalloids in soil. Materials and methods This study explored the potential of unmodified and modified (with KMnO4) biochars derived from sawdust and rice husk at two different temperatures (300 and 700 °C) on the mobility of arsenic (As) in contaminated soil.

In the present work, the olive mill solid waste (OMSW)-derived biochar (BC) was produced at various pyrolytic temperatures (300–700°C) and characterized to investigate its potential negative versus positive application effects on pH, electrical conductivity (EC), and nutrients (P, K, Na, Ca, Mg, Fe, Mn, Zn, and Cu) availability in a calcareous loamy sand soil. Therefore, a greenhouse pot experiment with maize (Zea mays L.) was conducted using treatments consisting of a control (CK), inorganic fertilizer of NPK (INF), and 1% and 3% (w/w) of OMSW-derived BCs.

Natural clay sediments were collected from ten different localities in Saudi Arabia (S-1 from eastern, S-2 to S-4 from middle and S-5 to S-10 from western regions), characterized and evaluated for their efficiency towards chlortetracycline (CTC) removal from aqueous solutions. Sediment S-4 exhibited highest surface area (288.5 m2 g−1), followed by S-5, S-9, and S-1 (252.1, 249.6, and 110.4 m2 g−1, respectively). Sediments S-5, S-9, S-2, and S-4 showed the highest cation exchange capacities (CEC) (62.33, 56.54, 52.72, and 46.85 cmol kg−1, respectively).

2,4-Dichlorophenol (2,4-DCP) is a hazardous chlorinated organic chemical derived from phenol that exerts serious effects on living organisms. In the present study, SnO2 templated with grapefruit peel carbon as a nanocomposite (SnO2@GPC) was designed via ball-milling, and its mechanism of 2,4-DCP adsorption in aqueous solution was determined.

Soil treatment methods to cope with ever-growing demands of construction industry and environmental aspects are always explored for their suitability in different in-situ conditions. Of late, enzyme induced calcite precipitation (EICP) is gaining importance as a reliable technique to improve soil properties and for contaminant remediation scenarios. In the present work, swelling and permeability characteristics of two native Indian cohesive soils (Black and Red) are explored.

Emission of greenhouse gases (GHG) including carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4) due to anthropogenic activities has changed the world climate, consequently resulting in global warming. Biochar can potentially deplete atmospheric carbon (C) levels and enhance C sequestration to combat climate change. Lower mineralization and higher recalcitrance of biochar enhance the C sequestration and reduce the release of CO2. Biochar application to the soil reduces N2O and CH4 emissions and increase microbial growth and activities.

The Kingdom of Saudi Arabia (KSA) is one of the most vulnerable countries to climate change due to its geographical location with a continental climate, cold winter, hot summer, and random rainfall. This chapter focuses on the effects of climate change on soils and groundwater in valley wadi Rumah, Qassim, KSA by using remote sensing and geographic information system (GIS) techniques. Three satellite images (taken in 1972, 1990, and 2000) were acquired and analyzed to detect the changes in topography during these years.

Purpose