Synthesis of magnetite/lanthanum hydroxide composite and magnetite/aluminum hydroxide composite for removal of phosphate

Recent developments in alginate-based adsorbents for removing phosphate ions from wastewater: a review

“…In contrast, at pH above 7, the beads were negatively charged and surrounded by hydroxyl groups which could compete with phosphate ions for the active sites of the beads. This result agrees well with the studies by Youness et al , 86,87 and Qixuan et al 88 The adsorption of phosphate on Zr@AlgKN composite beads was evaluated in the presence of different co-anions, such as Cl − , HCO 3 − , SO 4 2− , F − and HCrO 4 − . It was found that HCO 3 − showed the lowest competition with phosphate ions for the adsorption sites of the beads.…”

“…In contrast, at pH above 7, the beads were negatively charged and surrounded by hydroxyl groups which could compete with phosphate ions for the active sites of the beads. This result agrees well with the studies by Youness et al, 86,87 and Qixuan et al 88 The adsorption of phosphate on Zr@AlgKN composite beads was evaluated in the presence of different co-anions, such as Cl À , HCO Recently, bentonite (BT) has drawn a great deal of interest as an applicable adsorbent since it is inorganic. 89 In this context, Xu et al 74 scrutinized the adsorption performance of modied bentonite entrapped in Alg beads (Al-NaBT-Alg) towards the adsorptive removal of phosphate from wastewater.…”

Sludge-based biochar with lanthanum modification for phosphate recovery from wastewater streams

“…As shown in Fig. 7c, compared with SBP, a new peak appeared at ∼3550 cm −1 for SBP-La assigned to the O-H stretching group of La oxide or La hydroxide; peaks at ∼800 and ∼470 cm −1 corresponding to the symmetric stretching vibration of Si-O from the Si-O-Al sandwiched structure 40 disappeared due to the alteration of the Si-O structure by La loading. More importantly, the peak at ∼3550 cm −1 became weaker after phosphate adsorption, which likely resulted from the exchange of the hydroxyl group with phosphate and the formation of inner-sphere complexes.…”

Preparation and Coagulation Performance of Polyaluminum Lanthanum Silicate Coagulant

“…It is of great environmental concern and sustainable significance to remove phosphorus from the aquatic environment and mitigate eutrophication. Various studies have been conducted on the development of modified materials to deal with severe phosphorus eutrophication [26][27][28]. Aluminum compounds have been in use for the removal of phosphate.…”